Does Trema micranthum (L.) Blume Produce Cannabinoids?

There are inconclusive claims in the scientific literature that the species Trema micranthum, widely distributed throughout the Brazilian territory, may produce phytocannabinoids, potentially serving as an alternative to Cannabis sativa. In this study, we conducted a comprehensive investigation to assess the presence of phytocannabinoids in two Trema micranthum samples collected in the Midwest region of Brazil. In trying to detect cannabinoids in T. micranthum, a recommended cannabis screening test was employed, the Fast Blue BB Salt (FBBBS) colorimetric assay, followed by thin-layer chromatography (TLC) and instrumental techniques: high-performance liquid chromatography coupled to diode array detector (HPLC-DAD) and gas chromatography coupled to mass spectrometry (GC-MS). When employed without chloroform extraction, the FBBBS reagent yielded positive results for extracts from all parts of T. micranthum (leaves, branches, fruits, and inflorescences). However, these initial positive results from the FBBBS test, suggesting the presence of cannabinoids, were not corroborated by FBBBS followed by chloroform extraction, TLC, or the instrumental techniques used in this study. These additional outcomes suggest that the positive FBBBS test results were likely due to the presence of other phenolic compounds rather than phytocannabinoids. For example, the presence of vitexin-like compounds in T. micranthum extracts might explain the positive FBBBS test results. Therefore, new assertions that T. micranthum produces cannabinoids will require the support of more selective experiments to avoid false-positive claims based on less selective screening tests.

Cross-validation of existing signatures and derivation of a novel 29-gene transcriptomic signature predictive of progression to TB in a Brazilian cohort of household contacts of pulmonary TB.

The goal of this study was to identify individuals at risk of progression and reactivation among household contacts (HHC) of pulmonary TB cases in Vitoria, Brazil. We first evaluated the predictive performance of six published signatures on the transcriptional dataset obtained from peripheral blood mononuclear cell samples from HHC that either progressed to TB disease or not (non-progressors) during a five-year follow-up. The area under the curve (AUC) values for the six signatures ranged from 0.670 to 0.461, and the PPVs did not reach the WHO published target product profiles (TPPs). We therefore used as training cohort the earliest time-point samples from the African cohort of adolescents (GSE79362) and applied an ensemble feature selection pipeline to derive a novel 29-gene signature (PREDICT29). PREDICT29 was tested on 16 progressors and 21 non-progressors. PREDICT29 performed better in segregating progressors from non-progressors in the Brazil cohort with the area under the curve (AUC) value of 0.911 and PPV of 20%. This proof of concept study demonstrates that PREDICT29 can predict risk of progression/reactivation to clinical TB disease in recently exposed individuals at least 5 years prior to disease development. Upon validation in larger and geographically diverse cohorts, PREDICT29 can be used to risk-stratify recently infected for targeted therapy.

Triterpenes from Pouteria ramiflora (Mart.) Radlk. Leaves (Sapotaceae).

Pouteria ramiflora (Mart.) Radlk. (Sapotaceae) is a species used by inhabitants from the Cerrado for its edible fruits and medicinal value. Hexane crude extracts from leaves and fractions were evaluated for in vitro α-amylase inhibitory activity and antioxidant potential. The fraction with the highest α-amylase inhibitory activity was submitted to a phytochemical study. Three triterpenes were isolated, friedelin, epi-friedelanol, and taraxerol. This is the first report of these compounds isolated from P. ramiflora. Moreover, this is the first report of friedelin isolated from Pouteria sp. Epi-friedelanol was present in significant amounts, suggesting that this compound could be a candidate marker for this species.

[Prevalence of infection with Mycobacterium tuberculosis and associated factors in community health workers in Brazil based on the tuberculin skin test]. / Prevalência e fatores associados à infecção pelo Mycobacterium tuberculosis entre agentes comunitários de saúde no Brasil, usando-se a prova tuberculínica.

This article aimed to determine the prevalence of latent Mycobacterium tuberculosis infection and associated factors in community health workers (CHW) in Brazil, using two cutoff points for the tuberculin skin test (5mm and 10mm). This was a cross-sectional study with data on gender, age, BCG scar, working in a primary care unit (PCU), having a household contact with tuberculosis (TB), alcohol consumption, previous tuberculin skin test (TST), smoking, time on the job as CHW, and comorbidities. Logistic regression was used to estimate odds ratios (OR) and to control for confounding. TST was applied and read after 48-72 hours. Prevalence rates were 57.88% and 37.3%, respectively, for the 5mm and 10mm TST cutoffs. Variables that remained associated with positive TST using the 10mm cutoff were working in a primary care unit that had implemented a Tuberculosis Control Program (TCP) and history of household contact with TB. Variables associated with the 5mm cutoff were working in a primary care unit with a TCP. Necessary actions at the local level include awareness-raising and strengthening of continuing education.

Immunogenicity and safety of a recombinant tetravalent dengue vaccine in children and adolescents ages 9-16 years in Brazil.

Immunogenicity and safety of a recombinant, live-attenuated, tetravalent dengue disease vaccine (CYD-TDV) was evaluated in children/adolescents in Brazil. In this observer-blind, placebo-controlled, phase II single-center study, children/adolescents (ages 9-16 years) were randomized to receive CYD-TDV or placebo at 0, 6, and 12 months. Immunogenicity was assessed using a 50% plaque neutralization test. Overall, 150 participants were enrolled (CYD-TDV: N = 100; placebo: N = 50). Injection site pain and headache were the most common solicited injection site and systemic reactions. Unsolicited adverse events (AEs) and serious AEs were similar between groups. No serious AEs were vaccine-related. Geometric mean titers against all dengue virus serotypes increased with CYD-TDV vaccination and were 267, 544, 741, and 432 1/dil for serotypes 1-4, respectively, after dose 3, representing a mean fold increase from baseline of 5, 6, 6, and 20, respectively. CYD-TDV vaccination elicited a neutralizing antibody response against serotypes 1-4 and was well-tolerated in children/adolescents in a dengue-endemic region.

Prevalência e fatores associados à infecção pelo Mycobacterium tuberculosis entre agentes comunitários de saúde no Brasil, usando-se a prova tuberculínica / Prevalence of infection with Mycobacterium tuberculosis and associated factors in community health workers in Brazil based on the tuberculin skin test / Prevalencia y factores asociados a la infección porMycobacterium tuberculosis, usando la prueba tuberculina entre los agentes comunitarios de salud en Brasil

Resumo Este artigo tem por objetivo determinar a prevalência e os fatores associados à infecção latente pelo Mycobacterium tuberculosis entre agentes comunitários de saúde (ACS), usando dois pontos de corte da prova tuberculínica 5mm e 10mm. Trata-se de estudo transversal, com dados coletados sobre sexo, idade, cicatriz de BCG, prova tuberculínica (PT) anterior, tempo que trabalha na profissão de ACS, atuar em unidade básica de saúde (UBS), ter tido contato intradomiciliar com tuberculose (TB), usar álcool, ser fumante e apresentar comorbidades. Para controle de variáveis de confusão e estimativa da medida de efeito (OR), foi empregada a regressão logística. Aplicou-se PT, com leitura após 48-72 horas. As prevalências foram de 57,88% e 37,3%, respectivamente, para 5mm e 10mm. Manteve-se associada à positividade para o ponto de corte de 10mm a condição de trabalhar em UBS com Programa de Controle de Tuberculose (PCT) implementado e já ter tido contato intradomiciliar com TB. Já para o ponto de corte de 5mm, trabalhar em UBS com PCT e implementado. São necessárias ações de conscientização nos municípios e fortalecimento das ações de educação permanente sobre a temática.

Abstract This article aimed to determine the prevalence of latent Mycobacterium tuberculosis infection and associated factors in community health workers (CHW) in Brazil, using two cutoff points for the tuberculin skin test (5mm and 10mm). This was a cross-sectional study with data on gender, age, BCG scar, working in a primary care unit (PCU), having a household contact with tuberculosis (TB), alcohol consumption, previous tuberculin skin test (TST), smoking, time on the job as CHW, and comorbidities. Logistic regression was used to estimate odds ratios (OR) and to control for confounding. TST was applied and read after 48-72 hours. Prevalence rates were 57.88% and 37.3%, respectively, for the 5mm and 10mm TST cutoffs. Variables that remained associated with positive TST using the 10mm cutoff were working in a primary care unit that had implemented a Tuberculosis Control Program (TCP) and history of household contact with TB. Variables associated with the 5mm cutoff were working in a primary care unit with a TCP. Necessary actions at the local level include awareness-raising and strengthening of continuing education.

Resumen Este artículo tiene como objetivo determinar la prevalencia y los factores asociados con la infección por Mycobacterium tuberculosis latente entre los agentes comunitarios de salud (ACS), utilizando dos puntos de corte de la tuberculina: prueba de 5mm y 10mm. Un estudio transversal con los datos recogidos sobre: género, edad, cicatriz de BCG (marca de la vacuna), trabajar en una unidade básica de salud (UBS), vivir en un hogar con tuberculosis, el consumo de alcohol, prueba de la tuberculina (PT) anterior, tabaquismo, antigüedad en la profesión como agente comunitario de salud y comorbilidades. Para controlar las variables de confusión y estimar medidas de efecto (OR) se utilizó la regresión logística. Se aplicó el PT, con una lectura después de 48-72 horas. Las tasas de prevalencia fueron un 57,88% y 37,3%, respectivamente, para 5 y 10mm. Se mantuvo asociado con positividad en el trabajo de corte de 10mm en UBS, implementado por el Programa de Control de Tuberculosis (PCT), y que tuvo contacto con la tuberculosis en el hogar. En cuanto al trabajo de 5 mm de corte en la atención primaria se implementó con el PCT. Se necesitan acciones de sensibilización en los municipios.

[Knowledge about tuberculosis by doctors and nurses, who work in the Family Health Strategy in the city of Vitória, Espírito Santo State: a cross-sectional study]. / O conhecimento de enfermeiros e médicos que trabalham na Estratégia de Saúde da Família acerca da tuberculose no município de Vitória (ES): um estudo de corte transversal.

Brazil is in 14th among the 23 countries responsible for 80% of the tuberculosis (TB) cases in the world. Aiming to understand the maintenance of these indexes, this study was developed to identify if the knowledge about tuberculosis by doctors and nurses, who work in the Family Health Strategy in the city of Vitória (ES), would be a factor in the mediation of the prevention processes, diagnosis and treatment of the Tuberculosis. This is a cross-sectional study, with a sample size of 50 professionals. The collected data had been analyzed using the Chi-square and Fisher Exact tests with significance level of 0.05. Regarding the transmission and diagnosis of the Tuberculosis, there was no statistically significant difference between doctors and nurses. Only one variable presented a statistical difference: 41% of doctors and 15% of the nurses (p<0.05) mentioned that the patient must be attended in a place of choice of the doctor or nurse, and still, 4% of the total of the sample had answered that the supervision cannot be made by a member of the family. The research proves that doctors and nurses has knowledge to reduce the indexes of Tuberculosis, even so is indispensable the continuous study and qualification of these professionals.

Mycobacterium tuberculosis infection among community health workers involved in TB control.

OBJECTIVE: To evaluate the incidence of Mycobacterium tuberculosis infection, using tuberculin skin test, among community health agents (CHAs) monitoring TB patients in the city of Cachoeiro de Itapemirim, Brazil. METHODS: We included 30 CHAs acting in the Family Health Program and 30 of their family members residing in the same household. The tuberculin skin test results of each CHA were compared with those of the corresponding family member. RESULTS: Of the 30 CHAs, 27 (90.0%) were female, compared with 23 (76.7%) of the 30 family members (p = 0.299). The mean age of the CHA group and of the family member group was, respectively, 36.8 and 39.7 years. No statistically significant difference was found between the groups regarding the level of education. Regarding M. tuberculosis exposure, the same number of participants in the two groups reported having known or had contact with a TB patient (17 individuals; 56.7%). There was a statistically significant difference regarding positive tuberculin skin test results (26.7% in the CHA groupand 3.3% in the family member group; p = 0,011). CONCLUSIONS: M. tuberculosis infection was significantly higher among CHAs than among their family members, fueling the debate on the occupational risk involved in the activities of these professionals.

O conhecimento de enfermeiros e médicos que trabalham na Estratégia de Saúde da Família acerca da tuberculose no município de Vitória (ES): um estudo de corte transversal / Knowledge about tuberculosis by doctors and nurses, who work in the Family Health Strategy in the city of Vitória, Espírito Santo State: a cross-sectional study

O Brasil está no 14º lugar entre os 23 países responsáveis por 80 por cento dos casos da doença no mundo. Buscando compreender a manutenção desses índices, estruturou-se este estudo, com o objetivo de identificar se o conhecimento, sobre a tuberculose, de médicos e enfermeiros que trabalham na Estratégia de Saúde da Família no município de Vitória (ES), seria um fator relevante na mediação dos processos de prevenção, diagnóstico e tratamento da tuberculose. É um estudo de corte transversal, tendo como amostra 50 profissionais. Os dados coletados foram analisados utilizando-se o teste qui-quadrado exato de Fischer com o nível de significância de 0.05. Em relação à transmissão e ao diagnóstico da tuberculose, não houve diferença estatisticamente significativa entre médicos e enfermeiros. Apenas uma variável apresentou diferença estatística: 41 por cento dos médicos e 15 por cento dos enfermeiros (p<0,05) disseram que o paciente deve ser assistido em um local de escolha do médico ou enfermeiro, e ainda 4 por cento do total da amostra responderam que a supervisão não pode ser feita por um membro da família. A pesquisa comprova que médicos e enfermeiros possuem conhecimento para reduzir os índices da tuberculose, embora sejam indispensáveis o contínuo estudo e capacitação desses profissionais.

Brazil is in 14th among the 23 countries responsible for 80 percent of the tuberculosis (TB) cases in the world. Aiming to understand the maintenance of these indexes, this study was developed to identify if the knowledge about tuberculosis by doctors and nurses, who work in the Family Health Strategy in the city of Vitória (ES), would be a factor in the mediation of the prevention processes, diagnosis and treatment of the Tuberculosis. This is a cross-sectional study, with a sample size of 50 professionals. The collected data had been analyzed using the Chi-square and Fisher Exact tests with significance level of 0.05. Regarding the transmission and diagnosis of the Tuberculosis, there was no statistically significant difference between doctors and nurses. Only one variable presented a statistical difference: 41 percent of doctors and 15 percent of the nurses (p<0,05) mentioned that the patient must be attended in a place of choice of the doctor or nurse, and still, 4 percent of the total of the sample had answered that the supervision cannot be made by a member of the family. The research proves that doctors and nurses has knowledge to reduce the indexes of Tuberculosis, even so is indispensable the continuous study and qualification of these professionals.

Infecção por Mycobacterium tuberculosis entre agentes comunitários de saúde que atuam no controle da TB / Mycobacterium tuberculosis infection among community health workers involved in TB control

OBJETIVO: Avaliar a incidência de infecção por Mycobacterium tuberculosis através da prova tuberculínica em agentes comunitários de saúde (ACS) que acompanham pacientes em tratamento de TB no município de Cachoeiro de Itapemirim (ES). MÉTODOS: Incluímos 30 ACS que atuam no Programa de Saúde da Família e 30 de seus familiares residentes no mesmo domicílio. Comparamos o resultado do teste tuberculínico de cada ACS e do membro familiar correspondente. RESULTADOS: Entre os 30 ACS, 27 (90,0 por cento) eram do sexo feminino, ao passo que entre os 30 familiares, 23 (76,7 por cento) eram do sexo feminino (p = 0,299). A idade média do grupo ACS e do grupo dos familiares foi, respectivamente, 36,8 e 39,7 anos. Não houve diferença estatística no nível de escolaridade entre os grupos estudados. Na investigação da exposição ao M. tuberculosis, o mesmo número de indivíduos nos dois grupos afirmou conhecer ou já ter tido algum contato com paciente com TB (17 indivíduos; 56,7 por cento). Houve diferença estatisticamente significativa quanto ao resultado positivo da prova tuberculínica nos dois grupos (26,7 por cento no grupo ACS e 3,3 por cento no grupo de familiares; p = 0,011). CONCLUSÕES: A infecção por M. tuberculosis entre os ACS foi significativamente maior que entre seus familiares, e isso contribui para o debate em torno do risco ocupacional envolvido nas atividades destes profissionais.

OBJECTIVE: To evaluate the incidence of Mycobacterium tuberculosis infection, using tuberculin skin test, among community health agents (CHAs) monitoring TB patients in the city of Cachoeiro de Itapemirim, Brazil. METHODS: We included 30 CHAs acting in the Family Health Program and 30 of their family members residing in the same household. The tuberculin skin test results of each CHA were compared with those of the corresponding family member. RESULTS: Of the 30 CHAs, 27 (90.0 percent) were female, compared with 23 (76.7 percent) of the 30 family members (p = 0.299). The mean age of the CHA group and of the family member group was, respectively, 36.8 and 39.7 years. No statistically significant difference was found between the groups regarding the level of education. Regarding M. tuberculosis exposure, the same number of participants in the two groups reported having known or had contact with a TB patient (17 individuals; 56.7 percent). There was a statistically significant difference regarding positive tuberculin skin test results (26.7 percent in the CHA groupand 3.3 percent in the family member group; p = 0,011). CONCLUSIONS: M. tuberculosis infection was significantly higher among CHAs than among their family members, fueling the debate on the occupational risk involved in the activities of these professionals.