Epidemiological aspects of pediculosis by Pediculus humanus capitis (Phthiraptera: Pediculidae) in Minas Gerais: a systematic review / Aspectos epidemiológicos da pediculose por Pediculus humanus capitis (Phthiraptera: Pediculidae) em Minas Gerais: uma revisão sistemática

Abstract Background Head lice, or head pediculosis, is a parasitosis considered a serious public health problem that affects mainly resource-limited countries. Objective To describe epidemiological aspects of the pediculosis capitis in Minas Gerais, in Brazil. Method This systematic review was conducted through the standards established by the Preferred Reporting Items in Systematic Reviews and Metanalyses (PRISMA). PubMed, LILACS, and SciELO databases, as well as the gray literature, were searched. Results Nine of 1,167 studies were included, published between 1988 and 2019. These studies reported a total prevalence of parasitosis that ranged from 1.4% to 57.4%. The prevalence of head lice ranged from 0.0% to 66.7% for males and 2.3% to 57.4% for females, thus being higher in black-skinned people (1.4% to 40.3%). Regarding age, the highest prevalence was 10-12 years old (45.3%). As for the characteristics of the hair, there was a greater infestation in people with long (16.0% to 79.5%), wavy (0.0% to 44.7%), dark (0.0% to 36.6%), with low capillary density (35.4%), and thick hair (39.2%). Conclusion Head pediculosis affects both sexes, different ages, and races, representing an important health problem in Minas Gerais, not only due to the presence of ectoparasite but also to the secondary complications that can be generated from this parasitism.

Resumo Introdução A pediculose de cabeça é uma parasitose considerada um sério problema de saúde pública, afetando principalmente países com recursos limitados. Objetivo Descrever os aspectos epidemiológicos da pediculose de cabeça em Minas Gerais, Brasil. Método Revisão sistemática conduzida por meio dos padrões estabelecidos pelo Preferred Reporting Items in Systematic Reviews and Metanalyses (PRISMA). Foram pesquisadas as bases de dados PubMed, LILACS e SciELO, bem como a literatura cinza. Resultados Nove de 1.167 estudos foram incluídos, publicados entre 1988 e 2019. Relatou-se uma prevalência total da parasitose que variou de 1,4% a 57,4%. Ela variou de 0,0% a 66,7% para homens e 2,3% a 57,4% para mulheres, sendo maior em pessoas de cor negra (1,4% a 40,3%). Em relação à idade, a maior prevalência foi de 10 a 12 anos (45,3%). Quanto às características dos cabelos, houve maior infestação em pessoas com cabelos longos (16,0% a 79,5%), ondulados (0,0% a 44,7%), escuros (0,0% a 36,6%), com baixa densidade capilar (35,4%) e fios grossos (39,2%). Conclusão A pediculose atinge ambos os sexos, diferentes idades e raças, representando um importante problema de saúde em Minas Gerais, não só pela presença do ectoparasita, mas também pelas complicações secundárias que podem ser geradas desse parasitismo.

Quality of life predictors for people living with HIV/AIDS in an impoverished region of Brazil

Abstract INTRODUCTION: Quality of life (QoL) is important for people living with HIV/AIDS, particularly as the disease progresses. This study evaluated the QoL of people living with HIV/AIDS (PLWHA), as well as its predictors, in one of the most impoverished regions of Brazil. METHODS: This cross-sectional study was conducted with patients older than 18 years with HIV/AIDS from two specialized HIV/AIDS care centers in the city of Montes Claros between 2013 and 2014. Sample size was calculated considering the estimates of mean scores for various dimensions of the European Portuguese version of the World Health's Organization Quality of Life Instrument in HIV Infection (WHOQOL-HIV Bref). The following parameters were adopted: CI of 95%, estimated mean scores for QoL equal to 15, estimated variance for QoL scores equal to 16, and 5% relative margin of error. An increase of 20% was established to compensate for possible non-responses or losses, and correcting any design effect, adopting a deff equal to 2.0. Calculations revealed the need to interview at least 221 patients. Therefore, 226 patients living with HIV/AIDS were randomly selected. RESULTS: A total of 226 patients with mean age 43.7 years were evaluated: 51.8% men, 51.8% unemployed, 51.8% with low schooling level, 89.8% used antiretrovirals, and 43.3% experienced depression. Despite this, data indicated that 65% self-assessed their QoL as good and very good. Low QoL was associated with sociodemographic variables and some clinical variables. CONCLUSIONS: Depression was the main predictor of low QoL in all domains evaluated.

Deficiência de iodo e fatores associados em lactentes e pré-escolares de um município do semiárido de Minas Gerais, Brasil, 2008 / Iodine deficiency and associated factors in infants and preschool children in an urban community in the semiarid region of Minas Gerais State, Brazil, 2008

O objetivo do estudo foi avaliar a prevalência de deficiência de iodo em crianças de 6 a 71 meses em Novo Cruzeiro, Minas Gerais, Brasil. Foram analisadas 475 crianças alocadas por amostragem probabilística estratificada em relação às concentrações de iodo no sal de consumo familiar e excreção urinária de iodo. Observou-se excreção deficiente de iodo em 34,4 por cento das crianças; entre as quais, 23,5 por cento apresentaram deficiência leve; 5,9 por cento, moderada; e 5 por cento, grave. Diferença na distribuição da deficiência de iodo urinário foi constatada entre o meio urbano e rural (p < 0,001), registrando concentrações medianas de iodúria de 150,8µg/L e 114,3µg/L, respectivamente. Observou-se alta proporção de deficiência entre crianças cujo teor de iodo no sal de consumo encontrava-se abaixo da recomendação. A deficiência de iodo em Novo Cruzeiro não constitui problema de saúde pública segundo a Organização Mundial da Saúde (OMS), embora apresente prevalência ainda expressiva. A distribuição limítrofe de iodúria associada a baixos níveis de iodo no sal sugere que as ações de controle dessa carência ainda não são completas no país.

The aim of this study was to evaluate the prevalence of iodine deficiency in children aged 6 to 71 months in Novo Cruzeiro, Minas Gerais State, Brazil. A total of 475 children, allocated by stratified probability sampling, were analyzed with respect to the iodine concentrations in the salt consumed by the family and urinary iodine. Iodine deficiency was verified in 34.4 percent of the children, of which 23.5 percent showed slight deficiency, 5.9 percent moderate and 5 percent serious deficiency. A difference in the distribution of iodine deficiency was observed between the urban and the rural environments (p < 0.001) where average urinary iodine concentrations of 150.8 and 114.3µg/L respectively were found. A greater proportion of iodine deficiency was observed among children where the proportion of iodine in the salt consumed was below the recommended level. Although expressive, iodine deficiency in Novo Cruzeiro is not a public health problem according to World Health Organization (WHO), The limitrophe distribution of the urinary iodine associated with low iodine levels in salt suggests that efforts to control this deficiency are not yet complete.

The organization of health services and visceral leishmaniasis: an integrated intervention to improve diagnosis and treatment / Contribuição à organização de serviços de saúde com atenção à leishmaniose visceral: um trabalho integrado para o diagnóstico e tratamento da doença

The objective of this study, carried out in municipalities located in a metropolitan region of Brazil, was to promote the early diagnosis and prompttreatment of visceral leishmaniasis. In the intervention model a health professional underwent training that covered all procedures involved in assisting patients with suspected visceral leishmaniasis. The professionals then returned to their municipalities where they implemented a workplan with the following aims: (a) at least onephysician able to diagnose and treat patients; (b) training of professionals for the laboratorial diagnosis of visceral leishmaniasis; (c) delivery of information on visceral leishmaniasis to the health workers. The implementation process was evaluated by follow-up meetings. Attendance of health professionals at the meetings, implementation of the workplan, and the visceral leishmaniasis case fatality rate before (1998-1999) and after (2001-2002) implementation of the model were used in the analysis. Among the 36 municipalities in the region, 22 were enrolled. Eight (36.3%) guaranteed at least 50% attendance in the meetings, and 14 (63.6%) had less than 50% attendance with no activities implemented. The fatality rate decreasedin the municipalities that implementedthe activities.

Estudo com o objetivo de diagnosticar precocemente e tratar de forma adequada a leishmaniose visceral foidesenvolvido em municípios de uma região metropolitana no Brasil. O modelo de intervenção previa a capacitação de um profissional de saúde que, após participar de um treinamento sobre diferentes aspectos da leishmaniose visceral, estaria apto a articular no seu município a implantação de um plano de ação que contemplaria três atividades: (a) ter pelo menos um médico para o diagnóstico e tratamento dos casos, (b) treinar profissionais para o diagnóstico laboratorial, (c) divulgar a informação sobre a leishmaniose visceral para profissionais de saúde. A implantação das atividades foi acompanhada por meio de reuniões durante três anos. Para as análises foram utilizados como indicadores: a presença dos profissionais às reuniões, a implantação das atividades e a redução da letalidade, antes (1998-1999) e após (2001-2002) a implantação. Entre os 36 municípios da região, 22 participaram. Oito (36,3%) tiveram 50% ou mais de presença às reuniões e 14 (63,6%) tiveram menos que 50% e nenhuma atividade implantada. Houve decréscimo da letalidade entre os municípios que implementaram as atividades.

Impact of highly active antiretroviral therapy (HAART) on the incidence of opportunistic infections, hospitalizations and mortality among children and adolescents living with HIV/AIDS in Belo Horizonte, Minas Gerais State, Brazil

The impact of highly active antiretroviral therapy (HAART) can be evaluated using indicators, such as rates of opportunistic infections, hospitalizations by cause of infection, and associated death. This study aimed to estimate the impact of HAART on the incidence of these indicators, in children and adolescents with HIV/AIDS. It was a hybrid cohort study; 371 patients were followed from 1989 to 2003. In December 2003, 76 percent of the patients were still being followed, while 12.1 percent had died, 9.5 percent had dropped out, and 2.4 percent had been transferred. The overall rate of opportunistic infections was 18.32 infections/100 persons-year and 2.63 in the pre- and post-HAART periods, respectively. In the multivariate analysis, the risk of developing an opportunistic infection was 5.4 times greater and 3.3 times greater for hospitalization risk before HAART. Respiratory causes represented 65 percent of the hospitalizations and they were reduced by 44.6 percent with therapeutic intervention. The average hospital stay of 15 days was reduced to 9.There was a post-HAART decline in deaths of 38 percent. This study demonstrates the effectiveness of HAART in significantly reducing opportunistic infections, hospitalizations, and deaths in this Brazilian cohort.

O impacto da terapia anti-retroviral de alta potência ativa (HAART) pode ser avaliado utilizando-se indicadores, como taxas de incidências de infecções oportunistas, hospitalizações por causas infecciosas e mortalidade associada. O objetivo deste trabalho foi estimar o impacto da HAART na incidência desses indicadores em crianças e adolescentes com HIV/AIDS. Trata-se de uma coorte híbrida, na qual foram acompanhados 371 pacientes no período de 1989-2003. Em dezembro de 2003, 76 por cento dos pacientes permaneciam em acompanhamento, 12,1 por cento faleceram, 9,5 por cento foram perda de seguimento e 2,4 por cento transferidos. A taxa de incidência global de infecções oportunistas foi de 18,32 infecções/100 pessoas-ano e 2,63 nos períodos pré e pós-HAART, respectivamente. Na análise multivariada, risco relativo de desenvolvimento de infecção oportunista foi 5,4 vezes maior e 3,3 vezes maior para hospitalizações, antes da HAART. Causas respiratórias representaram 65 por cento das hospitalizações, sendo reduzidas em 44,6 por cento com a intervenção terapêutica. A mediana de duração das hospitalizações apresentou queda: 15 para 9 dias. Houve 38 por cento de declínio nos óbitos pós-HAART. Este estudo demonstrou a efetividade da HAART, associando-a com significativa redução na incidência das infecções oportunistas, hospitalizações e mortalidade nesta coorte brasileira.

Diagnosing human asymptomatic visceral leishmaniasis in an urban area of the State of Minas Gerais, using serological and molecular biology techniques

A population-based cross-sectional study was set up in Sabará country, Southeastern Brazil, to identify asymptomatic human visceral leishmaniasis in an urban area of low disease prevalence. Blood was collected on filter paper (n=1,604 inhabitants) and examined by indirect immunofluorescent test, enzyme-linked immunosorbent assay and immunochromatographic strip test. The prevalence rates of infection ranged from 2.4 to 5.6 percent depending on the test used. One year later, venous blood was collected in a subset of 226 participants (102 seropositive and 124 seronegative). The tests performed were IFAT, ELISA, rk39-ELISA, polymerase chain reaction and hybridization with Leishmania donovani complex probe. No clinical signs or symptoms of leishmaniasis were observed. Using hybridization as a reference test, the sensitivity and specificity of serology were respectively: 24.8 and 71 percent (ELISA); 26.3 and 76.3 percent (rk-39); 30.1 and 63.4 percent (IFAT). Due to disagreements, different criteria were tested to define the infection and hybridization should be considered in epidemiological studies.

Um estudo seccional de base populacional foi desenvolvido no município de Sabará, região sudeste do Brasil, para identificar a leishmaniose visceral humana assintomática em uma área urbana de baixa prevalência da doença. Foi coletado sangue em papel filtro (n=1.604 moradores), sendo examinados pela reação de imunofluoresência indireta, ensaio imunoenzimático e teste imunocromatográfico (strip test). As taxas de prevalência da infecção variaram de 2,4 a 5,6 por cento, dependendo do teste utilizado. Um ano depois foi coletado sangue venoso de um subgrupo de 226 participantes (102 soropositivos e 124 soronegativos). Os testes realizados foram IFAT, ELISA, rk39-ELISA, reação em cadeia da polimerase e hibridização com sonda específica para o complexo Leishmania donovani. Não foi observado nenhum sinal clínico ou sintoma de leishmaniose. Usando a hibridização como teste de referência, a sensibilidade e especificidade dos testes sorológicos foram, respectivamente: 24.8 e 71 por cento (ELISA); 26,3 e 76,3 por cento (rk39-ELISA); 30,1 e 63,4 por cento (IFAT). Devido a discordâncias, diferentes critérios foram testados para definir a presença da infecção e a hibridização deveria ser considerada em estudos epidemiológicos.

Determinants of Human Immunodeficiency Virus (HIV) prevalence in homosexual and bisexual men screened for admission to a cohort study of HIV negatives in Belo Horizonte, Brazil: Project Horizonte

Project Horizonte, an open cohort of homosexual and bisexual human immunodeficiency virus (HIV-1) negative men, is a component of the AIDS Vaccine Program, in Belo Horizonte, Minas Gerais, Brazil. The objective of this study was to compare volunteers testing HIV positive at cohort entry with a sample of those who tested HIV negative in order to identify risk factors for prevalent HIV infection, in a population being screened for enrollment at Project Horizonte. A nested case-control study was conducted. HIV positive volunteers at entry (cases) were matched by age and admission date to three HIV negative controls each. Selected variables used for the current analysis included demographic factors, sexual behavior and other risk factors for HIV infection. During the study period (1994-2001), among the 621 volunteers screened, 61 tested positive for HIV. Cases were matched to 183 HIV negative control subjects. After adjustments, the main risk factors associated with HIV infection were unprotected sex with an occasional partners, OR = 3.7 (CI 95 percent 1.3-10.6), receptive anal intercourse with an occasional partner, OR = 2.8 (95 percent CI 0.9-8.9) and belonging to the negro racial group, OR = 3.4 (CI 95 percent 1.1-11.9). These variables were associated with an increase in the risk of HIV infection among men who have sex with men at the screening for admission to an open HIV negative cohort