Serological and vaccine evaluation for hepatitis B among Community Health Workers / Avaliação sorológica e vacinal para hepatite B entre Agentes Comunitários de Saúde / Evaluación serológica y vacuna para la hepatitis B entre Agentes Comunitarios de Salud

Abstract Objective: to identify the vaccination and serological status against hepatitis B among community health workers; to vaccinate against hepatitis B virus and to evaluate the immune response of susceptible workers. Method: phase I, cross-sectional and descriptive study, among community health workers in a capital city of the Midwest region, through a self-administered questionnaire, checking of vaccination cards, and blood collection for testing of serological markers for hepatitis B. Phase II, cohort study carried out in vaccinated non-immune workers identified in phase I. They received one dose of vaccine (challenge dose) and serological testing. Results: a total of 109 workers participated in the study. Most had vaccination record (97; 89.0%) and vaccination completeness (75; 77.3%), while the isolated anti-HBs (Antibodies against hepatitis B virus) marker was detected in 78 (71.6%) workers. The prevalence of hepatitis B virus exposure was 8.2%. Of the ten non-immune vaccinated workers, after challenge dose, one remained susceptible. Conclusion: although most workers are vaccinated and show immunological response to hepatitis B, susceptibility after challenge dose was identified. Therefore, it is necessary to have a surveillance program of the vaccination situation and serological status for this virus, to promote these workers' safety.

Resumo Objetivo: identificar a situação vacinal e sorológica contra hepatite B entre agentes comunitários de saúde; vacinar contra o vírus da hepatite B e avaliar a resposta imunológica dos agentes susceptíveis. Método: fase I, estudo transversal e descritivo, entre agentes comunitários de saúde de uma capital da região Centro-oeste, por meio de questionário autoaplicável, conferência do cartão vacinal e coleta de sangue para testagem dos marcadores sorológicos para hepatite B. Fase II, estudo de coorte realizado em trabalhadores vacinados não imunes e identificados na fase I. Estes receberam uma dose da vacina (dose desafio) e teste sorológico. Resultados: participaram do estudo 109 agentes. A maioria tinha registro de vacinação (97; 89,0%) e completude vacinal (75; 77,3%), já o marcador anti-HBs (anticorpos contra o vírus da hepatite B) isolado foi detectado em 78 (71,6%) agentes. A prevalência de exposição ao vírus da hepatite B foi de 8,2%. Dos dez agentes vacinados não imunes, após a dose desafio, um permaneceu susceptível. Conclusão: apesar da maioria dos trabalhadores estarem vacinados e apresentarem resposta imunológica para hepatite B, a suscetibilidade após a dose desafio foi identificada. Portanto, é necessário que haja um programa de vigilância da situação vacinal e estado sorológico para este vírus, para promover a segurança destes trabalhadores.

Resumen Objetivo: identificar la situación de la vacunación y serología contra la hepatitis B entre agentes comunitarios de la salud, vacunar contra el virus de la hepatitis B y evaluar la respuesta inmunológica de los agentes susceptibles. Método: fase I, estudio transversal y descriptivo, entre agentes comunitarios de la salud de una capital de la región centro oeste, por medio de cuestionario autoadministrado, verificación del carné de vacunación y extracción de sangre para comprobar los marcadores serológicos para la hepatitis B. Fase II, estudio de cohorte realizado en trabajadores vacunados no inmunes e identificados en la Fase I; estos recibieron una dosis de la vacuna (dosis de desafío) y realizaron el test serológico. Resultados: participaron del estudio 109 agentes. La mayoría tenía registro de vacunación (97; 89,0%) y de cobertura de vacunación (75; 77,3%); el marcador anti-HBs (Anticuerpos contra el virus de la hepatitis B) aislado fue detectado en 78 (71,6%) de los agentes. La prevalencia de exposición al virus de la hepatitis B fue de 8,2%. De los diez agentes vacunados no inmunes, después de la dosis desafío, uno permaneció susceptible. Conclusión: a pesar de que la mayoría de los trabajadores estaban vacunados y presentaron respuesta inmunológica para la hepatitis B, la susceptibilidad, después de la dosis desafío, fue identificada. Por tanto, es necesario que exista un programa de vigilancia de la situación de vacunación y estado serológico para este virus, para promover la seguridad de estos trabajadores.

Nursing performance in COVID-19 and non-COVID-19 units: Implications for occupational health / Atuação da enfermagem em unidades dedicadas e não dedicadas à COVID-19: implicações na saúde ocupacional / Trabajo de enfermería en unidades dedicadas y no dedicadas al COVID-19: consecuencias para la salud ocupacional

Abstract Objective: to analyze the implications of the pandemic on the Nursing team's occupational health according to its performance in COVID-19 and non-COVID-19 units. Method: a multicenter and mixed-methods study, with a sequential explanatory strategy. A total of 845 professionals took part in the first stage, answering an electronic form which contained sociodemographic and work-related variables, as well as about the pandemic and their health, in addition to the Self-Reporting Questionnaire. 19 professionals were interviewed in the second stage. The quantitative data were submitted to statistical analysis and the qualitative ones to thematic content analysis, with integration by connection. Results: the pandemic exerted impacts on the professionals' health, both in the COVID-19 and non-COVID-19 areas. However, composition of the teams presented different characteristics between the areas, as well as the risk perceptions and the work demands. Conclusion: the professionals working in areas COVID-19 and non-COVID-19 areas are equally affected, although with different work exposure regarding the requirements at work in the COVID-19 units and the fear of contamination in non-COVID-19 units.

Resumo Objetivo: analisar as implicações da pandemia sobre a saúde ocupacional da equipe de enfermagem conforme a atuação em unidades dedicadas e não dedicadas à COVID-19. Método: estudo multicêntrico, de método misto, estratégia explanatória sequencial. Participaram 845 profissionais na primeira etapa, respondendo a um formulário eletrônico contendo variáveis sociodemográficas, laborais, sobre a pandemia e sua saúde e o Self-Reporting Questionnaire. Na segunda etapa, 19 profissionais foram entrevistados. Os dados quantitativos foram submetidos à estatística analítica e os qualitativos à análise temática de conteúdo, sendo integrados por conexão. Resultados: os impactos da pandemia sobre a saúde dos profissionais ocorreram tanto nas áreas dedicadas como nas não dedicadas à COVID-19. Contudo, a composição das equipes apresentou características distintas entre as áreas, bem como as percepções de risco e das exigências no trabalho. Conclusão: os profissionais que atuam em áreas dedicadas e não dedicadas à COVID-19 estão igualmente adoecidos, mas com exposição laboral distinta quanto às exigências no trabalho nas unidades dedicadas e o medo da contaminação nas unidades não dedicadas.

Resumen Objetivo: analizar las consecuencias que tuvo la pandemia en la salud ocupacional de los enfermeros según si se desempeñaban en unidades dedicadas y no dedicadas al COVID-19. Método: estudio multicéntrico, método mixto, estrategia explicativa secuencial. En la primera etapa participaron en total 845 profesionales que respondieron un formulario electrónico que contenía variables sociodemográficas, ocupacionales, sobre la pandemia y la salud y el Self-Reporting Questionnaire. En la segunda etapa, fueron entrevistados 19 profesionales. Los datos cuantitativos fueron sometidos a estadística analítica y los datos cualitativos al análisis de contenido temático, posteriormente, ambos fueron integrados por conexión. Resultados: los impactos de la pandemia en la salud de los profesionales se produjeron tanto en las áreas dedicadas como en las no dedicadas al COVID-19. Sin embargo, la composición de los equipos presentó distintas características entre las áreas, así como también diferentes percepciones de riesgo y exigencias en el trabajo. Conclusión: los profesionales que trabajan en áreas dedicadas y no dedicadas al COVID-19 se enfermaron por igual, pero tuvieron diferente exposición ocupacional debido a las exigencias que presentaba el trabajo en las unidades dedicadas y al miedo al contagio en las unidades no dedicadas.

Seropositividad de Chlamydia psittaci en trabajadores expuestos a aves y revisión de la literatura: evidencia de circulación en Antioquia / Chlamydia psittaci seropositivity in workers exposed to birds and review of the literature: Evidence of circulation in Antioquia

Introducción. La psitacosis es una enfermedad zoonótica causada por Chlamydia psittaci. Esta bacteria es catalogada como un agente con potencial bioterrorista y ha causado múltiples brotes en trabajadores con exposición laboral a aves en diferentes lugares del mundo. En Colombia, no se hace seguimiento epidemiológico de la infección y existe una gran brecha en el conocimiento. Objetivos. Determinar la frecuencia de anticuerpos contra C. psittaci en trabajadores con exposición laboral a aves y sus factores asociados. Además, revisar la literatura en relación con los estudios sobre el tema realizados en Colombia. Materiales y métodos. Se llevó a cabo un estudio descriptivo, transversal, con intención analítica, en trabajadores en contacto con aves y se revisó la literatura científica relacionada en Colombia. Se detectaron anticuerpos IgM e IgG contra C. psittaci en suero por microinmunofluorescencia. La descripción de las características sociodemográficas y de exposición se hizo con frecuencias y medidas de resumen. Se exploraron factores asociados por análisis bivariados y multivariados. La revisión de la literatura científica y gris se hizo con búsqueda estructurada. Resultados. Se analizaron 54 trabajadores en contacto con aves y se encontró una prevalencia de anticuerpos del 31,5 %. El ejercer funciones de sacrificio y faenado de las aves sin ser médico veterinario fue un factor de riesgo para la presencia de anticuerpos. Solo se encontraron cuatro estudios previos sobre C. psittaci hechos en Colombia. Conclusiones. Este estudio constituye la primera evidencia de la circulación de C. psittaci en trabajadores en contacto con aves en Antioquia y el segundo reporte en el país. Estos hallazgos aportan desde la salud pública a la estrategia One Health.

Introduction. Psittacosis is a zoonotic disease caused by Chlamydia psittaci, a bacterium classified as an agent with bioterrorist potential. It has caused multiple outbreaks in exposed poultry workers around the world. Colombia has no epidemiological follow-up of the infection and a big knowledge gap. Objectives. To determine the antibodies' frequency against C. psittaci in workers with occupational exposure to birds and to review the literature on studies conducted in Colombia. Materials and methods. We conducted a cross-sectional descriptive study with analytical intent on workers in contact with birds and reviewed the related literature in Colombia. IgM and IgG serum antibodies against C. psittaci were detected by microimmunofluorescence. The sociodemographic and exposure characteristics were expressed as frequencies and summary measures. Associated factors were explored by bivariate and multivariate analysis. The scientific and gray literature review was done with a structured search. Results. We analyzed 54 workers in contact with birds. Antibody prevalence was 31.5%. Slaughtering and evisceration by non-veterinarians was a risk factor for antibody presence. There are only four previous studies on C. psittaci in Colombia. Conclusions. Here, we present the first evidence of C. psittaci circulation among workers exposed to birds in Antioquia and the second report in the country. These findings contribute to the "One Health" public health strategy.

Fatores associados a acidentes com exposição a material biológico de trabalhadores da saúde da atenção básica e da média complexidade em cinco municípios baianos / Factors associated with occupational accidents involving exposure to biological material in primary care and medium complexity among workers in five municipalities in Bahia, Brazil

Resumo Introdução no trabalho em saúde podem ocorrer os acidentes de trabalho com exposição a material biológico, potencial fonte de infecção para doenças graves. Objetivo estimar os fatores associados aos acidentes com exposição a material biológico entre trabalhadores da saúde da atenção básica e da média complexidade. Método estudo transversal, exploratório, realizado com trabalhadores da atenção básica e da média complexidade em cinco municípios baianos. O processamento dos dados incluiu análises descritivas, uni e multivariadas. Resultados a incidência dos acidentes de trabalho com exposição a material biológico foi de 3,4%, atingindo a faixa etária entre 19 a 33 anos (RR: 2,06; IC 95%: 1,2 - 3,4), revelando ausência de prática regular de atividade de lazer (RR: 1,8; IC 95%:1,1-2,8), atuação na média complexidade (RR: 1,8; IC 95%: 1,2-2,8), exposição a agentes biológicos (RR: 3,7; IC 95%: 2,4 - 5,9) e trabalho de alta exigência (RR: 1,9; IC 95%: 1,1 - 3,3). Conclusão verifica-se ser necessária a priorização dos trabalhadores da saúde em ações de vigilância em ambientes de trabalho e programas voltados à prevenção dos acidentes como compromisso da área de saúde do trabalhador no Sistema Único de Saúde.

Abstract Background: i n health work, work accidents may occur with exposure to biological material, a potential source of infection for serious diseases. Objective To estimate the factors associated with occupational accidents with exposure to biological material among health workers in primary care and medium complexity. Method A cross-sectional and exploratory study was carried out with primary care and medium complexity workers in five municipalities in Bahia, Brazil. Data processing included descriptive, univariate, and multivariate analyses. Results The incidence of occupational accidents with exposure to biological material was 3.4%. The associated factors were age group of 19 to33 years (RR: 2.06; 95% CI: 1.2 - 3.4), absence of regular leisure activity (RR: 1.8; 95% CI: 1.1- 2.8), acting in medium complexity (RR: 1.8; 95% CI: 1.2-2.8), exposure to biological agents (RR: 3.7; 95% CI: 2.4 - 5, 9), and high-strain jobs (RR: 1.9; 95% CI: 1.1 - 3.3). Conclusion It is necessary to prioritize workers' health in actions to monitor work environments and programs aimed at preventing accidents as a commitment in occupational health, in the Unified Health System (SUS).

Fatores associados à percepção do risco biológico e aos acidentes com material biológico em Agentes Comunitários de Saúde / Factors associated with the perception of biological risk and accidents with biological material in community health workers / Factores asociados a la percepción del riesgo biológico y de los accidentes con material biológico en los agentes comunitarios de salud

Objetivos: identificar fatores associados à acidentes com material biológico e à percepção do risco biológico entre Agentes Comunitários de Saúde (ACS). Métodos: estudo transversal analítico realizado com ACS, mediante aplicação de questionário e consulta de registros no cartão de vacinas. Regressão múltipla de Poisson com variância robusta foi realizada para analisar os fatores associados aos acidentes com material biológico e à percepção do risco biológico. Resultados: dos 207 participantes, 50,24% (IC 95% = 43,4 - 56,9) apresentou autorrelato de acidentes com material biológico, tendo como fatores associados possuir formação de nível superior [RP ajustada = 2,2 (IC 95% = 1,0 - 4,7)], ter outro vínculo empregatício [RP ajustada = 1,5 (IC 95% = 1,0 - 2,3)] e conhecimento quanto às vacinas necessárias ao ACS [RP ajustada = 0,7 (0,5 - 0,9)]. Constatou-se que 74,39% dos ACS tinham percepção de algum risco biológico, mesmo de forma limitada. Entre as variáveis investigadas, na análise ajustada, nenhuma mostrou associação com a percepção de risco biológico pelos ACS. Conclusão: a prevalência de acidentes com material biológico em ACS é elevada, sendo fatores associados possuir formação de nível superior, ter outro vínculo empregatício e apresentar conhecimento quanto as vacinas necessárias para a atividade laboral. Há limitada percepção de risco pela maioria dos ACS. Não foram encontrados fatores associados à esta variável.

Objectives: to identify factors associated with accidents involving biological material and the perception of biological risk among community health workers (CHWs). Methods: an analytical cross-sectional study was carried out with CHWs using a questionnaire and consultation of vaccination card records. Poisson multiple regression with robust variance was conducted to analyze the factors associated with accidents involving biological material and perception of biological risk. Results: of the 207 participants, 50.24% (95% CI = 43.4 - 56.9) self-reported accidents with biological material, and the associated factors were having a university degree [adjusted PR = 2.2 (95% CI = 1.0 - 4.7)], having another job [adjusted PR = 1.5 (95% CI = 1.0 - 2.3)] and knowledge of the vaccines needed by CHWs [adjusted PR = 0.7 (0.5 - 0.9)]. It was found that 74.39% of CHWs were aware of some biological risk, even to a limited extent. Among the variables investigated, in the adjusted analysis, none showed an association with the perception of biological risk by CHWs. Conclusion: the prevalence of accidents involving biological material among CHWs is high, and the associated factors are having a university degree, having another job, and having knowledge of the vaccines required for the job. Most CHWs have a limited perception of the risk. No factors were associated with this variable.

Objetivos: identificar los factores asociados a los accidentes con material biológico y la percepción del riesgo biológico entre agentes comunitarios de salud (ACS). Métodos: estudio transversal analítico realizado con los ACS mediante cuestionario y consulta de los registros de las cartillas de vacunación. Se realizó una regresión múltiple de Poisson con varianza robusta para analizar los factores asociados a los accidentes con material biológico y la percepción del riesgo biológico. Resultados: de los 207 participantes, el 50,24% (IC 95% = 43,4 - 56,9) declararon haber sufrido accidentes con material biológico, y los factores asociados fueron tener un título universitario [PR ajustado = 2,2 (IC 95% = 1,0 - 4,7)], tener otro trabajo [PR ajustado = 1,5 (IC 95% = 1,0 - 2,3)] y conocer las vacunas que necesitan los ACS [PR ajustado = 0,7 (0,5 - 0,9)]. Se observó que el 74,39% de los ACS conocían algún riesgo biológico, aunque fuera de forma limitada. De las variables investigadas en el análisis ajustado, ninguna mostró una asociación con la percepción del riesgo biológico por parte de los ACS. Conclusión: la prevalencia de accidentes con material biológico entre los ACS es alta, y los factores asociados son tener un título universitario, tener otro trabajo y tener conocimientos sobre las vacunas necesarias para el trabajo. La mayoría de los ACS tienen una percepción limitada del riesgo. No se encontraron factores asociados a esta variable.

Trabalho, exploração e suicídio de fumicultores no Rio Grande do Sul / Work, exploitation, and suicide of tobacco farmers in Rio Grande do Sul

O Rio Grande do Sul se destaca no cultivo do fumo, sendo o estado brasileiro responsável pela maior produção de tabaco do país. Pesquisas apontam que o cultivo do tabaco pode ser bastante insalubre, levando os fumicultores a sofrerem com doenças decorrentes da produção de fumo. Dentre esses problemas de saúde, o suicídio é alarmante. Esta pesquisa teve como objetivo analisar como as relações econômicas com as fumageiras podem impactar a saúde mental de fumicultores, contribuindo para desfechos desfavoráveis no caso das famílias entrevistadas. Foram realizadas entrevistas semiestruturadas com familiares de fumicultores que cometeram suicídio e atores sociais que acompanham esses agricultores. As entrevistas foram analisadas de acordo com o método fenomenológico interpretativo e os resultados foram agrupados em duas categorias de análise: 1) fumicultura como parte constituinte de uma cultura e identidade local; e 2) relação de trabalho entre fumicultores e fumageiras. Os fumicultores apresentam dificuldades na comercialização do tabaco, devido a problemas com suas instituições representativas, além do endividamento provocado por um sistema opressor que mantém os fumicultores subordinados às indústrias de beneficiamento de tabaco em nível técnico e de capital

Rio Grande do Sul stands out in tobacco cultivation, and is the Brazilian state responsible for the largest tobacco production in the country. Research shows that tobacco cultivation can be quite unhealthy, leading farmers to suffer from diseases resulting from tobacco production. Among these health problems, the suicide is alarming. This research aimed to analyze how economic relationships with tobacco companies can impact the mental health of tobacco farmers, contributing to unfavorable outcomes in the case of the families interviewed. Semi-structured interviews were carried out with family members of tobacco farmers that committed suicide and social actors that follow up these farmers. The interviews were analyzed according to the interpretive phenomenological method and the results were grouped into two categories of analysis: 1) tobacco growing as part of a local culture and identity, and 2) the working relationship between tobacco farmers and tobacco industries. Tobacco farmers have difficulties in selling tobacco due to problems with their representative institutions, in addition to indebtedness, caused by an oppressive system that keeps tobacco farmers subordinate to tobacco processing industries at a technical and capital level

O impacto da exposição química sobre o transcriptoma de trabalhadores formais e informais / The impact of chemical exposure on the transcriptome of formal and informal workers

Introdução: Exposições químicas podem variar em populações geograficamente distintas, com diferentes hábitos, estilos de vida e características individuais. Alguns elementos químicos encontrados no ambiente são capazes de alterar a expressão gênica humana. Objetivos: a) quantificar as concentrações de elementos potencialmente tóxicos (EPTs: As, Cd, Cr, Cu, Hg, Mn, Ni, Pb, Sb, Sn, e Zn) na urina da população de Limeira, e nas peças de joias e pó de solda; b) quantificar as concentrações de EPTs no sangue dos participantes de Limeira e Volta Redonda; c) avaliar os riscos de doenças associadas à exposição ocupacional; d) avaliar o impacto da exposição ocupacional na expressão gênica de trabalhadores formais e informais. Métodos: O grupo Exposto foi composto por trabalhadores informais que realizam soldagem de joias e bijuterias em ambiente domiciliar na cidade de Limeira, SP; e por trabalhadores formais da Companhia Siderúrgica Nacional, em Volta Redonda, RJ. O grupo Controle incluiu moradores dos mesmos bairros dos trabalhadores, mas que não desenvolviam nenhuma atividade diretamente relacionada à exposição química. Amostras de sangue foram coletadas para quantificação de glicose, insulina, perfil lipídico, EPTs e para análise transcriptômica. Em Limeira, também foi quantificada a concentração de EPTs na urina. Para transcriptômica, o RNA foi extraído e hibridizado com Agilent SurePrint G3 Human Gene Expression 8x60K v2 Microarray. O pré-processamento, análise estatística e de vias de interesse foram realizados no software GeneSpring GX. Todos os participantes preencheram questionários sobre hábitos, percepção de risco, morbidade referida e exposição ocupacional. A associação entre exposição a EPTs e desfechos de saúde foi testada por modelo de regressão de Poisson multivariado. Resultados: Nos trabalhadores informais, foram detectados 16 genes superexpressos e 33 subexpressos em comparação com os controles (fold-change > 2). A análise de vias indicou genes enriquecidos em vias do processo inflamatório (quimiocinas MAPK, receptor Toll-like e NF-kappa B). Nos trabalhadores formais, foram encontrados 20 genes superexpressos e 50 subexpressos, com vias relacionadas à resposta imune e ao processo de aterosclerose. O único gene diferencialmente expresso (DEG) em comum nas duas populações foi o IFI27 relacionado na literatura a diferentes tipos de câncer. A produção informal de joias de Limeira foi associada a exposição dos trabalhadores ao Cd, com concentrações significativamente maiores na urina e no sangue dos trabalhadores comparado aos controles. Além disso, foi observada uma associação positiva entre as concentrações de Cd no sangue e a glicemia. As concentrações de As e Pb também foram maiores no sangue dos trabalhadores informais comparado aos controles, sendo que participantes com concentrações de Pb superiores a 2,6 µg dL-1 apresentaram prevalência de manifestações neurológicas 2,3 vezes maior (IC 95%: 1,17 - 4,58; p = 0,02). Não foram observadas diferenças significativas nos EPTs entre os grupos de Volta Redonda, provavelmente devido ao uso de equipamentos de proteção individual e à poluição ambiental na região. Conclusão: As diferenças na expressão gênica relacionadas à exposição ocupacional estão associadas, principalmente, à inflamação e à resposta imune. Os resultados sugerem que a exposição ocupacional prolongada a elementos tóxicos pode levar a consequências negativas para a saúde, como por exemplo, um aumento da prevalência de manifestações neurológicas. Os resultados exploratórios desta tese são um ponto de partida para estudos em populações sensíveis e pouco estudadas, especialmente, de países em desenvolvimento. Análises adicionais devem ser realizadas para investigar efeitos diretos e validar associações causais.

Introduction: Chemical exposures may vary in geographically distinct populations, with different habits, lifestyles, and individual characteristics. Objectives: a) to determine potentially toxic elements' (EPTs: As, Cd, Cr, Cu, Hg, Mn, Ni, Pb, Sb, Sn, and Zn) in the urine of the population of Limeira, and in jewelry pieces and soldering powder; b) determine the PTEs concentrations in the participants' blood from Limeira and Volta Redonda municipalities; c) investigate disease risks associated with occupational exposure; d) to evaluate the impact of occupational exposure on gene expression profile. Methods: The exposed group was composed of informal workers who perform soldering of jewelry inside their houses in the city of Limeira, SP; and formal workers from a steel company in the city of Volta Redonda, RJ. Control participants were recruited from the same neighborhoods without occupational chemical exposure. Blood samples were collected for blood glucose, insulin, lipid profile, and PTE determinations, and for transcriptomic analysis. In Limeira, PTE concentration in urine was also determined. RNA was extracted and hybridized to Agilent SurePrint G3 Human Gene Expression 8x60K v2 Microarray for transcriptomics analysis. Pre-processing, statistical, and pathway analysis were performed in GeneSpring GX software. All participants completed questionnaires about household risk, reported morbidity, and occupational exposure. The association between PTEs exposure and health outcomes was tested by a multivariable robust Poisson regression model. Results: 16 up- and 33 down-regulated genes (fold-change > 2) were observed in the informal workers. Pathway analysis revealed genes enriched in inflammatory process (MAPK, Toll-like receptor, and NF-kappa B chemokine signaling pathways). In formal workers, 20 up- and 50 down-regulated genes were found with pathways related to immune response and atherosclerosis development. The gene IFI27 which has been associated with various types of cancer was the only one commonly differentially expressed between informal and formal workers. Informal jewelry production in Limeira increased exposure to Cd, with significantly higher concentrations in the urine and blood of informal exposed workers compared to controls. Furthermore, a positive association was observed between blood Cd concentrations and glycemia. The blood concentration of As and Pb were also Participants with Pb concentrations higher than 2.6 µg dL-1 showed a prevalence of neurological manifestations 2.3 times higher (95% CI: 1.17 - 4.58; p = 0.02) than those with lower lead concentrations. No significant differences were observed between formal workers from Volta Redonda and their control group, probably, because of the use of individual protection equipment and the environmental pollution in the region. Conclusion: Differences in gene expression related to occupational exposure are mainly associated with inflammation and immune response. The results suggest that prolonged occupational exposure to toxic elements could lead to negative health outcomes, such as higher prevalence of neurological manifestations. These exploratory results are a starting point for analysis in sensitive and understudied populations, especially in developing countries. Further analysis should be carried out to investigate its direct effects and to validate causal associations.

Risk factors for chronic obstructive pulmonary disease (COPD) in a tertiary health institution in Lagos, Nigeria

Objective: To describe the clinical characteristics and identifiable risk factors for Chronic Obstructive Pulmonary Disease (COPD) in a real-world clinical setting. Design: Cross-sectional study among patients with COPD. Setting: The Respiratory clinic of the Lagos University Teaching Hospital. Participants: Consecutive patients with spirometry confirmed COPD on follow-up for ≥3 months. There were 79 participants. Intervention: None Main outcome measure: COPD risk factors, disease severity, comorbidities, and the severity of airflow limitation. Results: The mean age of the participants was 63.3± 12.4 years, and 47 (59.5) were male. There was a high symptom burden (73.4% had COPD assessment test (CAT) score >10), 33 (41.8%) and 4 (5.1%) had GOLD 3 and GOLD 4 airflow limitation, respectively. Risk factors were identified for 96.2% of the participants: history of asthma in 37 (46.8%), tobacco smoking 22 (27.8%), occupational exposure 15 (19%), biomass exposure 5 (6.6%), post-tuberculosis 3 (3.8%), old age (3.8%), and prematurity 1 (1.3%). Fifty-nine (74.7%) had Asthma COPD Overlap (ACO). There were no significant associations between the risk factors and disease severity. Participants with ACO had lower lung function and a high frequency of allergic rhinitis. Conclusion: Asthma was the most commonly identifiable risk factor for COPD, underscoring asthma risk reduction and management optimisation as priorities toward COPD burden mitigation. Future studies need to validate these findings and identify the predominant COPD phenotypes in our setting.

Benchmark Dose Assessment for Coke Oven Emissions-Induced Mitochondrial DNA Copy Number Damage Effects / 生物医学与环境科学（英文）

OBJECTIVE@#The study aimed to estimate the benchmark dose (BMD) of coke oven emissions (COEs) exposure based on mitochondrial damage with the mitochondrial DNA copy number (mtDNAcn) as a biomarker.@*METHODS@#A total of 782 subjects were recruited, including 238 controls and 544 exposed workers. The mtDNAcn of peripheral leukocytes was detected through the real-time fluorescence-based quantitative polymerase chain reaction. Three BMD approaches were used to calculate the BMD of COEs exposure based on the mitochondrial damage and its 95% confidence lower limit (BMDL).@*RESULTS@#The mtDNAcn of the exposure group was lower than that of the control group (0.60 ± 0.29 vs. 1.03 ± 0.31; P < 0.001). A dose-response relationship was shown between the mtDNAcn damage and COEs. Using the Benchmark Dose Software, the occupational exposure limits (OELs) for COEs exposure in males was 0.00190 mg/m 3. The OELs for COEs exposure using the BBMD were 0.00170 mg/m 3 for the total population, 0.00158 mg/m 3 for males, and 0.00174 mg/m 3 for females. In possible risk obtained from animal studies (PROAST), the OELs of the total population, males, and females were 0.00184, 0.00178, and 0.00192 mg/m 3, respectively.@*CONCLUSION@#Based on our conservative estimate, the BMDL of mitochondrial damage caused by COEs is 0.002 mg/m 3. This value will provide a benchmark for determining possible OELs.

Is chemical exposure present in informal work associated with Sars-CoV-2 infection?

ABSTRACT OBJECTIVE To compare the incidence of covid-19 symptoms between informal home-based workers and a control group and to assess the association of these cases with blood elements concentrations and other relevant risk factors for Sars-Cov-2 infection. METHODS Welders chemically exposed to potentially toxic elements (PTEs) (n = 26) and control participants (n = 25) answered questionnaires on adherence to social distancing and signs and symptoms of the disease for five months during the covid-19 pandemic. After follow-up, covid-19 serology tests were performed on a subsample of 12 chemically exposed workers and 20 control participants. Before the pandemic, PTE concentrations in blood (As, Mn, Ni, Cd, Hg, Sb, Sn, Cu, Zn, and Pb) were measured by ICP-MS. RESULTS The chemically exposed group had higher lead and cadmium levels in blood (p < 0.01). The control group presented lower adherence to social distancing (p = 0.016). Although not significant, welders had a 74% greater chance of having at least one covid-19 symptom compared with control participants, but their adherence to social distancing decreased this chance by 20%. The use of taxis for transportation was a risk factor significantly associated with covid-19 symptoms. CONCLUSION The lower adherence to social distancing among the control group greatly influences the development of covid-19. The literature lacks data linking exposure to PTEs and Sars-Cov-2 infection and/or severity. In this study, despite chemical exposure, working from home may have protected welders against covid-19, considering that they maintained greater social distancing than control participants.

Investigation on health status of workers exposed to glyphosate / 中华劳动卫生职业病杂志

Objective: To analyze the concentrations of glyphosate and its metabolites in occupational exposed workers and their possible effects on human health, so as to provide a reference for improving the safe use of glyphosate and toxicity research. Methods: From April to December 2020, 247 workers directly exposed to glyphosate in 5 enterprises were selected as the contact group, and 237 workers who were not exposed to glyphosate and other pesticides in the same enterprise were selected as the control group. Questionnaire survey and occupational health examination were conducted on objects, and the concentrations of glyphosate and its metabolites in the air of workplaces and biological samples were detected. The correlation between the concentrations and the difference of health examination between the two groups were analyzed. Results: The urine glyphosate concentration (0.022-47.668 mg/L), the rate of exceeding the standard (60.32%, 149/247) and the urine aminomethyl phosphonic acid concentration (<0.010-1.624 mg/L) in the contact group were higher than those in the control group [urine glyphosate concentration (<0.020-4.482 mg/L), the rate of exceeding the standard (2.53%, 6/237) and the urine aminomethyl phosphonic acid concentration (<0.010-0.524 mg/L) ], respectively (P<0.001). The exceeding standard rate of glyphosate concentration in the workplace was 33.67% (33/98). The concentration of glyphosate in the workplace was positively correlated with the concentrations of glyphosate and aminomethylphosphonic acid in urine (r(s)=0.804, 0.238, P<0.001), and the concentration of glyphosate in urine was positively correlated with the concentration of aminomethylphosphonic acid in urine (r(s)=0.549, P<0.001). The alanine aminotransferase (ALT), white cell ratio, creatinine, uric acid, the abnormal rates of ALT and total protein (TP) in the contact group were higher than those in the control group, and TP was lower than that in the control group, the differences were statistically different (P<0.05). The abnormal rates of overall liver function, overall renal function, blood routine test, urine routine test, electrocardiogram, liver B ultrasound and blood lipid in the contact group were significantly higher than those in the control group (P<0.05) . Conclusion: The concentration of glyphosate in the workplace is related to the concentrations of glyphosate and aminomethyl phosphonic acid in the urine of workers, and exposure to glyphosate may have some harmful effects on human health.

Research progress of occupational hazards in plywood manufacturing / 中华劳动卫生职业病杂志

Occupational disease hazards in plywood manufacturing mainly include wood dust, formaldehyde, phenol, ammonia, noise, terpene, microorganisms, etc. The exposure is complex with multiple factors accompanied or coexisted. In the production process, these factors are exceeded, and mass occupational disease hazard events occurred among workers. Exposure to wood dust, formaldehyde, terpene, etc., put workers at increased risk of cancer. This article provides a review of this issue in order to provide a scientific basis for the prevention and control of occupational disease hazards in plywood manufacturing.

41 cases of chronic obstructive pulmonary disease caused by occupational irritating chemicals / 中华劳动卫生职业病杂志

Objective: To analyze the case characteristics of Chronic obstructive pulmonary disease caused by occupational irritant chemicals (OI-COPD). To provide basis for revising its diagnostic criteria. Methods: From June to December 2021, we investigated the information of OI-COPD patients confirmed by Shandong Institute of Occupational Health and Prevention of Occupational Diseases, Guangxi Zhuang Autonomous Region Institute of Occupational Disease Prevention and Control, Qingdao Central Hospital affiliated to Qingdao University and other diagnostic institutions in the past five years, a total of 41 cases. The basic information of OI-COPD cases, occupational risk factors exposure information, medical history, smoking history and clinical symptoms were analyzed retrospectively. The measurement data were tested for normal distribution, which was described by x±s, and compared between groups by t test; Those who do not conform to the normal distribution are described by the median [M (Q(1), Q(3)) ] and analyzed by nonparametric test; The counting data were expressed in frequency and rate (% ), and the comparison between groups was tested. Results: Of the 41 cases, 33 were male and 8 were female. The age of the patient diagnosed with OI-COPD was (49.5±10.3) years old, and the minimum age was 30 years old; Among them, 8 patients had a definite long-term smoking history (more than 5 years) ; The exposure duration of occupational risk factors was (18.6±10.3) years, of which 3 patients had exposure duration of less than 5 years; The occupational risk factors leading to OI-COPD include acids and acid-forming compounds, bases, aldehydes, nitrogen oxides, chlorine and its compounds, etc. The exposure level of occupational risk factors is related to the degree of COPD airflow restriction (χ(2)=6.17, P <0.05). 18 patients with diagnosis age <50 years old were diagnosed as early-onset COPD. The incidence of respiratory symptoms in the early diagnosis COPD group was lower than that in the non-early diagnosis COPD group, and the FEV1% pred was significantly higher than that in the non-early diagnosis COPD group. The difference was statistically significant (P<0.01 ) . Conclusion: The exposure level of occupational risk factors may be the risk factor affecting the degree of COPD airflow restriction. With the increase of the exposure level of COPD patients, the proportion of respiratory symptoms will also increase accordingly.

Analysis of dust and noise exposure levels in the mining industry from the national surveillance program in 2019 / 中华劳动卫生职业病杂志

Objective: To understand the exposure level of dust and noise in the mining industry and provide data support for revising policy for the prevention and control of occupational diseases. Methods: In May 2022, Data was collected through the National Surveillance Program for Occupational Hazards in the Workplace. Descriptive analysis was conducted for dust and noise levels by industry type and enterprise size from 7, 679 enterprises in the mining industry among 29 provincial regions nationwide. Results: The enterprises in the mining industry included in the National Surveillance Program for Occupational Hazards in the Workplace are mainly small and micro, accounting for 47.97% (3684/7679) and 30.00% (230/7679) respectively. The industry is mainly compred of employers in the non-metallic ming and beneficiation industry, accounting for 50.25% (3859/7679). Among the enterprises with silica dust, coal dust, and noise hazards, the proportion of enterprises where total dust concentration and noise intensity exceed the standard is higher than 50%. 30% of the posts are with an exposure level of silica dust, coal dust, and noise that exceeds the standard. The exceedance rate and the median of the time-weighted average concentration of total coal dust among large and medium-sized enterprises are higher than those among small and micro-sized enterprises (P<0.05) . Conclusion: The dust and noise hazards in the mining industry are lower than in the past in China, but more than 25% of workers are still at a high risk of occupational pneumoconiosis and noise deafness. Therefore, intervention and surveillance strategies should be strengthened in the future.

Analysis of the status of occupational disease prevention and control of enterprises in mining and manufacturing industries in China in 2019 / 中华劳动卫生职业病杂志

Objective: To analyze the status of prevention and treatment of occupational diseases among mining and manufacturing industries in China in 2019, provide the scientific basis for the formulation and revision of policies and standards of prevention and treatment of occupational diseases. Methods: In May 2022, Collecting data of a project named Surveillance of Occupational Hazards in the Workplace in 2019 through the National Surveillance System for Occupational Hazards in the workplace. Compare the status of prevention and treatment of occupational diseases in 63 563 enterprises of mining and manufacturing industries among different dimensions. Results: The training rate of managers was 76.17% and that of occupational health managers was 76.97%. The rate of reporting of occupational diseases hazardous items was 67.58%, the rate of launching of the detection of occupational hazards was 57.16%, and the rate of launching of occupational health examination was 62.42%. Excluding the distribution rate of dust mask, the installation rate of various occupational prevention facilities and the distribution rate of gas mask and hearing protector were less than 80%. The differences in all the indicators among different areas, enterprise scales, economic types were statistically significant (P<0.05) . Conclusion: There are still some enterprises which are relatively weak in the ability of the prevention and treatment of occupational diseases in China. Measures such as special support, guidance and strengthen supervision should be taken towards those enterprises toimprove the awareness of prevention and treatment of occupational diseases and the level of that.

Paternal occupational exposures and infant congenital heart defects in the Japan Environment and Children's Study

BACKGROUND@#Few prospective studies have investigated the association between paternal occupational exposures and risk of infant congenital heart defects (CHDs). We investigated the associations between paternal occupational exposures, frequency of use, and concurrent or sequential exposure to a mixture of compounds and the risk of infant CHDs.@*METHODS@#Our study examined 28,866 participants in the Japan Environment and Children's Study. Logistic regression analysis was used to estimate odds ratios (ORs) and 95% confidence intervals (CIs) associated with paternal occupational exposures during the 3 months until pregnancy was noticed after adjustment for potential confounding factors of the infant CHDs. CHD diagnosis was ascertained from medical record.@*RESULTS@#In total, 175 were diagnosed with infant CHDs. The number of fathers who were exposed to the following substances at least once a month were: 11,533 for photo copying machine/laser printer, 10,326 for permanent marker, 8,226 for soluble paint/inkjet printer, 6,188 for kerosene/petroleum/benzene/gasoline, 4,173 for organic solvents, 3,433 for chlorine bleach/germicide, 2,962 for engine oil, 2,931 for insecticide, 2,460 for medical sterilizing disinfectant, 1,786 for welding fumes, 1,614 for dyestuffs, 1,247 for any products containing lead-like solder, 986 for herbicide, 919 for radiation/radioactive substances/isotopes, 837 for lead-free solder, 341 for microbes, 319 for formalin/formaldehyde, 301 for agricultural chemical not listed above or unidentified, 196 for general anesthetic for surgery at hospital, 171 for anti-cancer drug, 147 for chromium/arsenic/cadmium, 88 for mercury and 833 for other chemical substances. Paternal occupational exposure regularly to photo copying machine or laser printer and soluble paint/inkjet printer were associated with higher risks of infant CHDs: the adjusted ORs (95%CIs) were 1.38 (1.00-1.91) and 1.60 (1.08-2.37), respectively. The higher risks were also observed for occasional exposure to engine oil, any products containing lead-like solder lead-free solder, and microbes; the adjusted ORs (95%CIs) were 1.68 (1.02-2.77), 2.03 (1.06-3.88), 3.45 (1.85-6.43), and 4.51, (1.63-12.49), respectively.@*CONCLUSIONS@#Periconceptional paternal occupational exposure was associated with a higher risk of infant CHDs. Further studies using biomarkers of the association between paternal occupational exposure and infant CHDs are warranted.

Two cases of airway dysfunction related to diacetyl exposure / 中华劳动卫生职业病杂志

Occupational exposure to diacetyl can lead to bronchiolitis obliterans. In this paper, two patients with severe obstructive ventilation disorder who were exposed to diacetyl at a fragrance and flavours factory were analyzed. The clinical manifestations were cough and shortness of breath. One of them showed Mosaic shadows and uneven perfusion in both lungs on CT, while the other was normal. Field investigation found that 4 of the 8 workers in the factory were found to have obstructive ventilation disorder, and 2 had small airway dysfunction. This paper summarizes the diagnostic process of patients in order to improve the understanding of airway dysfunction caused by occupational exposure to diacetyl and promote the development of relevant standards.

Quantitative risk assessment of occupational exposure to PCDD/Fs in the waste incineration industry / 中华劳动卫生职业病杂志

Objective: To analyze the level of PCDD/Fs exposure of occupational workers in the waste incineration industry and explore the risk of occupational exposure. Methods: In September 2021, literature on environmental PCDD/Fs exposure in waste incineration plants published from the establishment of the database to February 10, 2021 was retrieved from CNKI database. A total of 1365 literatures were retrieved, and 7 met the criteria for inclusion. The US Environmental Protection Agency (EPA) inhalation risk model was used to assess and analyze carcinogenic and non-carcinogenic risks of PCDD/Fs exposure among occupational workers in the waste incineration industry. Results: A total of 86 sampling sites were included in incineration plants in 7 regions. The study of Wuhan area showed that the concentration of working environment near the waste incinerator in the same factory was the highest, followed by the rest and office area in the factory. The concentration of PCDD/Fs in waste incinerators was the highest in Southwest China (4880.00-24880.00 pg TEQ/m(3)), and the lowest in Shenzhen (0.02-0.44 pg TEQ/m(3)). According to the cancer risk assessment, with the increase of exposure years, the risk of cancer increased. The highest risk of cancer was found in the waste incineration plants in Southwest China. When the exposure period was 1 year, the risk was moderate (22.40×10(-6)-114.20×10(-6)). When the exposure time was more than 5 years, the risk of cancer was high. In Jinan, workers working near the incinerator had a moderate risk of cancer after five years of exposure. In Zhejiang, workers were at medium risk of cancer after exposure for more than 20 years. Workers in Wuhan, Shanghai, Zhejiang Province, Shenzhen and the Pearl River Delta were still at low risk of cancer after 40 years of occupational exposure. HQ>1 of workers working near the waste incinerators in Jinan, Zhejiang Province and Southwest China, and the qualitative evaluation results showed that the non-carcinogenic risk was unacceptable. Conclusion: There are great differences in PCDD/Fs of occupational exposure in waste incineration industry, and the occupational exposure exceeding the occupational exposure limit has higher carcinogenic and non carcinogenic risks.

Correlation analysis and benchmark dose study on bone metabolic biochemical index of low doses of exposed hydrogen fluoride workers / 中华劳动卫生职业病杂志

Objective: To analyze correlation of occupational hydrogen fluoride exposure to low doses of bone metabolism index through occupational epidemiological investigation and benchmark dose calculation. Methods: In May 2021, using cluster sampling method, 237 workers exposed to hydrogen fluoride in a company were selected as the contact group, and 83 workers not exposed to hydrogen fluoride in an electronics production company were selected as the control group. The external exposure dose and urinary fluoride concentration, blood and urine biochemical indicators of the workers was measured.The relationship between external dose and internal dose of hydrogen fluoride was analyzed. The external dose, urinary fluoride was used as exposure biomarkers, while serum osteocalcin (BGP), serum alkaline phosphatase (AKP) and urinary hydroxyproline (HYP) were used as effect biomarkers for bone metabolism of hydrogen fluoride exposure. The benchmark dose calculation software (BMDS1.3.2) was used to calculate benchmark dose (BMD) . Results: Urine fluoride concentration in the contact group was correlated with creatinine-adjusted urine fluoride concentration (r=0.69, P=0.001). There was no significant correlation between the external dose of hydrogen fluoride and urine fluoride in the contact group (r=0.03, P=0.132). The concentrations of urine fluoride in the contact group and the control group were (0.81±0.61) and (0.45±0.14) mg/L, respectively, and the difference between the two groups was statistically significant (t=5.01, P=0.025). Using BGP, AKP and HYP as effect indexes, the urinary BMDL-05 values were 1.28, 1.47 and 1.08 mg/L, respectively. Conclusion: Urinary fluoride can sensitively reflect the changes in the effect indexes of biochemical indexes of bone metabolism. BGP and HYP can be used as early sensitive effect indexes of occupational hydrogen fluoride exposure.

Occupational exposure level and requirements for radiation protection of nuclear medical staff / 中华劳动卫生职业病杂志

With the rapid development of nuclear medicine, the number of nuclear medical staff has increased a lot in the past few years in China. Close-range operations, such as preparation and injections of radiopharmaceuticals, are usually carried out in nuclear medicine department. And the use of unsealed radionuclides may also create internal exposure risk. So, occupational exposure of nuclear medical staff is a main issue of occupational health management in China. In this paper, the occupational exposure level and requirements for radiation protection of nuclear medical staff are introduced to provide references for the related work that radiological health technical institutions carry out.