Characteristics of the school food environment associated with hypertension and obesity in Brazilian adolescents: a multilevel analysis of the Study of Cardiovascular Risks in Adolescents (ERICA).

OBJECTIVE: To characterize the food environment in schools that participated in the Study of Cardiovascular Risks in Adolescents (ERICA) and to identify individual and contextual factors associated with hypertension and obesity. DESIGN: National school-based survey. SETTING: Blood pressure, weight and height were measured, and characteristics of the schools were obtained in interviews with the principals. For each outcome, multilevel models of mixed effects were applied by logistic regression. PARTICIPANTS: School-going adolescents aged 12-17 years. RESULTS: A total of 73 399 adolescents were evaluated. The prevalence of hypertension was 9·6 (95 % CI 9·0, 10·3) % and that of obesity was 8·4 (95 % CI 7·9, 8·9) %. Approximately 50 % of the adolescents were able to purchase food at school and in its immediate vicinity and 82 % had access to no-charge meals through Brazil's National School Feeding Program. In the adjusted analysis, hypertension was associated (OR; 95 % CI) with the consumption of meals prepared on the school premises (0·79; 0·69, 0·92), the sale of food in the school's immediate vicinity (0·67; 0·48, 0·95) and the purchase of food in the school cafeteria (1·29; 1·11, 1·49). It was observed that there were lower odds of obesity among students who were offered meals prepared on the school premises (0·68; 0·54, 0·87). CONCLUSIONS: High frequency of sales of ultra-processed foods in schools was identified. Contextual and individual characteristics in the school food environment were associated with hypertension and obesity, pointing to the need for regulation and supervision of these spaces.

Time trends and changes in the distribution of malaria cases in the Brazilian Amazon Region, 2004-2013.

Recent efforts to reduce malaria incidence have had some successes. Nevertheless, malaria persists as a significant public health problem in the Brazilian Amazon. The objective of this study was to describe changes in malaria case characteristics and to identify trends in malaria incidence in the Brazilian Amazon. This study used data from the Malaria Epidemiological Surveillance and Case Notification Information System from 2004 to 2013. The annual parasite incidence (API) was calculated and joinpoint regression was used to assess the trends in API over time. There was a sharp increase in API in the state of Acre, followed by two periods of decrease. Pará also presented inconsistent decreases over the study period. Amapá, Amazonas, Rondônia, and Roraima showed statistically significant decreases over the period. The sharpest decrease occurred in Rondônia, with a reduction of 21.7% in the average annual percent change (AAPC) (AAPC: -21.7%; 95% confidence interval: -25.4%, -17.8%; p < 0.05). This panorama of malaria incidence highlights the importance of integrating evidence-based malaria surveillance and control. Malaria is highly preventable, and eliminating its transmission should be a goal in coming decades.

Factors associated with timely treatment of malaria in the Brazilian Amazon: a 10-year population-based study.

OBJECTIVE: To identify factors associated with timely treatment of malaria in the Brazilian Amazon. Malaria, despite being treatable, has proven difficult to control and continues to be an important public health problem globally. Brazil accounted for almost half of the 427 000 new malaria cases notified in the Americas in 2013. METHODS: This was a cross-sectional study using secondary data on all notified malaria cases for the period from 2004 - 2013. Timely treatment was considered to be all treatment started within 24 hours of symptoms onset. Multivariate logistic regression was used to identify independent factors associated with timely treatment. RESULTS: The proportion of cases starting treatment on a timely basis was 41.1%, tending to increase in more recent years (OR = 1.40; 95%CI: 1.37 - 1.42 in 2013). Furthermore, people starting within < 24 hours were more likely to: reside in the states of Rondônia (OR = 1.50; 95%CI: 1.49 - 1.51) or Acre (OR = 1.53; 95%CI: 1.55 - 1.57); be 0 - 5 years of age (OR = 1.39; 95%CI: 1.34 - 1.44) or 6 - 14 years of age (OR = 1.34; 95%CI: 1.32 - 1.36); be indigenous (OR = 1.41; 95%CI: 1.37 - 1.45); have a low level of schooling (OR = 1.20; 95%CI: 1.19 - 1.22); and be diagnosed by active detection (OR = 1.39; 95%CI: 1.38 - 1.39). CONCLUSION: In the Brazilian Amazon area, individuals were more likely to have timely treatment of malaria if they were young, residing in Acre or Rondônia states, have little schooling, and be identified through active detection. Identifying groups vulnerable to late treatment is important for preventing severe cases and malaria deaths.

Trends of main indicators of leprosy in Brazilian municipalities with high risk of leprosy transmission, 2001-2012.

BACKGROUND: Leprosy incidence has reduced in recent years in Brazil, although the disease still persists as a public health problem in some regions. To investigate the trends of selected leprosy indicators in Brazilian municipalities with high risk of transmission is essential to provide effective control of the disease, yet this area has not been investigated. METHODS: This is an ecological time-series study with multiple groups using Notifiable Diseases Information System (SINAN) data. All 692 municipalities of the states of Mato Grosso, Tocantins, Rondônia, Pará and Maranhão were included. The incidence rates of leprosy were calculated, as well as incidence rates in children under 15 years per 100,000 inhabitants and rates of new cases presenting grade-2 disabilities per 100,000 inhabitants. Joinpoint Regression was used to analyse the time trends of the different indicators studied. The spatial distribution of temporal variations of the indicators in the period was presented. RESULTS: Between 2001 and 2012, 176,929 leprosy cases were notified in the area studied, this being equivalent to 34.6 % of total cases in Brazil. In the aggregate of municipalities, there was a reduction in incidence rate of leprosy from 89.10 to 56.98 new cases per 100,000 inhabitants between 2001 and 2012, with a significant reduction between 2003 and 2012 (APC: - 6.2 %, 95 % CI: -7.2 % to -5.2 %). The incidence rate in <15 years also reduced significantly between 2003 and 2012 (APC: -5.6 %; 95 % CI: -7.2 % to -4.1 %). The rate of new cases with grade 2 disability remained stable between 2001 and 2012 (APC: -1.3 %; 95 % CI: -2.6 % to 0.1 %). CONCLUSION: Despite the reduction in the leprosy incidence rate, strategies for controlling this disease need to be enhanced to enable early case detection, especially in hyperendemic municipalities, in order to prevent disability.

Factors associated with the occurrence of Triatoma sordida (Hemiptera: Reduviidae) in rural localities of Central-West Brazil.

This study estimates the factors of artificial environments (houses and peridomestic areas) associated with Triatoma sordida occurrence. Manual searches for triatomines were performed in 136 domiciliary units (DUs) in two rural localities of Central-West Brazil. For each DU, 32 structural, 23 biotic and 28 management variables were obtained. Multiple logistic regression analysis was performed in order to identify statistically significant variables associated with occurrence of T. sordida in the study areas. A total of 1,057 specimens (99% in peridomiciles, mainly chicken coops) of T. sordida were collected from 63 DUs (infestation: 47%; density: ~8 specimens/DU; crowding: ~17 specimens/infested DU; colonisation: 81%). Only six (0.6%) out of 945 specimens examined were infected with Trypanosoma cruzi. The final adjusted logistic regression model indicated that the probability of T. sordida occurrence was higher in DU with wooden chicken coops, presence of > 30 animals in wooden corrals, presence of wood piles and presence of food storeroom. The results show the persistence of T. sordida in peridomestic habitats in rural localities of Central-West Brazil. However, the observed low intradomestic colonisation and minimal triatomine infection rates indicate that T. sordida has low potential to sustain high rates of T. cruzi transmission to residents of these localities.

Socioeconomic inequalities and mortality trends in BRICS, 1990-2010.

OBJECTIVE: To explore the presence and magnitude of--and change in--socioeconomic and health inequalities between and within Brazil, the Russian Federation, India, China and South Africa--the countries known as BRICS--between 1990 and 2010. METHODS: Comparable data on socioeconomic and health indicators, at both country and primary subnational levels, were obtained from publicly available sources. Health inequalities between and within countries were identified and summarized by using standard gap and gradient metrics. FINDINGS: Four of the BRICS countries showed increases in both income level and income inequality between 1990 and 2010. The exception was Brazil, where income inequality decreased over the same period. Between-country inequalities in level of education and access to sanitation remained mostly unchanged but the largest between-country difference in mean life expectancy increased, from 9 years in 1990 to 20 years in 2010. Throughout the study period, there was disproportionality in the burden of disease between BRICS. However, the national infant mortality rate fell substantially over the study period in all five countries. In Brazil and China, the magnitude of subnational income-related inequalities in infant mortality, both absolute and relative, also decreased substantially. CONCLUSION: Despite the economic prosperity and general improvements in health seen since 1990, profound inequalities in health persist both within and between BRICS. However, the substantial reductions observed--within Brazil and China--in the inequalities in income-related levels of infant mortality are encouraging.

Leprosy in Brazil and its association with characteristics of municipalities: ecological study, 2009-2011.

OBJECTIVE: To analyse the ecological association between the demographic and socio-economic characteristics of the Brazilian municipalities and average leprosy incidence rate in the period 2009-2011. METHODS: An ecological study taking the Brazilian municipalities as its units of analysis. The local empirical Bayes estimation method was used to obtain smoothed incidence rates (SIR) for leprosy. The mean, median, first quartile (Q1) and third quartile (Q3) of the SIR were calculated per 100 000 inhabitants. Hierarchical log-linear negative binomial regression models were used to estimate the incidence rate ratios (IRR). RESULTS: In the period 2009-2011, the average SIR of leprosy in Brazil was 20.2 per 100 000 inhabitants, and the median incidence rate among municipalities was 9.1 per 100 000 inhabitants. Significantly higher adjusted IRR were identified for large municipalities (IRR = 1.67) compared to small municipalities, as well as in municipalities with higher illiteracy rates (IRR = 2.15), more urbanised municipalities (IRR = 1.53), those with greater social inequality as per the Gini index (IRR = 1.26), high percentage of households with inadequate sanitation (IRR = 1.63), higher average number of people per room (IRR = 1.41), high proportions of Family Health Programme coverage (IRR = 1.29), high percentage of household contacts investigated (IRR = 2.30) and those with percentage of cases with grade 2 disability considered to be the medium (IRR = 1.26). CONCLUSIONS: In this study, SIR was significantly associated with municipalities with low socio-economic status. Disease control activities need to be focused on these municipalities, and investments need to be made in improving the population's living conditions.

Comparative effectiveness of first-line antiretroviral therapy: results from a large real-world cohort after the implementation of dolutegravir.

OBJECTIVE: We aimed to assess the effectiveness of first-line antiretroviral therapy (ART) regimens in achieving viral suppression at 12 months, from 2014 to 2017 in Brazil. DESIGN: A retrospective cohort study utilizing programmatic data from the Brazilian HIV Program. METHODS: Adults (aged 15-80 years) who started ART from January 2014 to July 2017 and had a viral load 365 (±90) days after treatment initiation were included. Associations with achieving viral suppression (<50 copies/ml) at 365 (±90) days were assessed using logistic regression. Our main study variable was ART regimen, and covariates included year of ART initiation, sex/exposure group, age, education, race, region, baseline CD4 and viral load counts, and adherence measured by pharmacy refill data. We performed both intent-to-treat and per-protocol analogous analyses. RESULTS: Out of 107 647 ART-naive patients, 71.5% initiated with tenofovir/lamivudine/efavirenz (TLE) and 10.5% with tenofovir/lamivudine/dolutegravir (TLD). Median age and CD4 cell counts were 34 [interquartile range (IQR) 26-46] and 379 cells/µl (IQR 190-568), respectively; 68.0% were men. Viral suppression by 12 months was 84.0% [95% confidence interval (95% CI) 83.7-84.2] with TLE and 90.5% (95% CI 90.0-91.0) with TLD, and below 80% for protease-inhibitor-based regimens. In the multivariable intent-to-treat-analogous analysis, controlling for cofactors related to viral suppression including adherence, the adjusted odds ratio (aOR) for TLD's viral suppression relative to TLE was 1.56 (95% CI 1.40-1.75). Findings were robust to secondary per-protocol analogous and sensitivity analysis. CONCLUSION: Our results showed the superiority of dolutegravir- over efavirenz- and protease-inhibitor-based regimens in suppressing viral replication in a real-word cohort of HIV-positive adults. This superiority was not driven by higher levels of adherence with dolutegravir-based regimens.

Factors Associated With Early Virological Response in HIV-Infected Individuals Starting Antiretroviral Therapy in Brazil (2014-2015): Results From a Large HIV Surveillance Cohort.

OBJECTIVE: To identify clinical, sociodemographic, and treatment-related factors associated with early virological response in HIV-infected adults starting antiretroviral treatment (ART) in Brazil in 2014-2015. METHODS: Data from 4 information systems from the Brazilian AIDS Program were combined to create a historical cohort. Unconditional logistic regression models were used to assess the likelihood of not achieving viral load suppression (VLS), defined as having either a viral load (VL) count >200 copies per milliliter or an aids-related death recorded within 180 ± 90 days after treatment initiation. RESULTS: Among 76,950 individuals, 64.8% were men; median age, CD4, and VL counts were 34 years, 378 cells per micro liter, and 38,131 copies per milliliter, respectively, and 85.2% achieved VLS. In the multivariate analysis, some factors which increased the odds of non-VLS were as follows: lower CD4 and higher VL counts, younger age, heterosexual or injection drug use groups (relative to men who have sex with men), lower educational level, black/brown race, higher pill burden, and higher dosing frequency. Regimens containing boosted protease inhibitors were similar to those containing nonnucleoside reverse transcriptase inhibitors and superior to those containing unboosted protease inhibitors (all P values <0.001). No difference was observed between patients with CD4 counts 350-499 and 500+ cells per micro liter. CONCLUSIONS: Our findings support the decision made in Brazil in 2013 to recommend immediate initiation of ART regardless of clinical stage or CD4. Several factors were found to be associated with poorer virologic outcomes and should be addressed to maximize ART adherence and success rates.

Time trends and changes in the distribution of malaria cases in the Brazilian Amazon Region, 2004-2013

Recent efforts to reduce malaria incidence have had some successes. Nevertheless, malaria persists as a significant public health problem in the Brazilian Amazon. The objective of this study was to describe changes in malaria case characteristics and to identify trends in malaria incidence in the Brazilian Amazon. This study used data from the Malaria Epidemiological Surveillance and Case Notification Information System from 2004 to 2013. The annual parasite incidence (API) was calculated and joinpoint regression was used to assess the trends in API over time. There was a sharp increase in API in the state of Acre, followed by two periods of decrease. Pará also presented inconsistent decreases over the study period. Amapá, Amazonas, Rondônia, and Roraima showed statistically significant decreases over the period. The sharpest decrease occurred in Rondônia, with a reduction of 21.7% in the average annual percent change (AAPC) (AAPC: -21.7%; 95% confidence interval: -25.4%, -17.8%; p < 0.05). This panorama of malaria incidence highlights the importance of integrating evidence-based malaria surveillance and control. Malaria is highly preventable, and eliminating its transmission should be a goal in coming decades.

Factors associated with timely treatment of malaria in the Brazilian Amazon: a 10-year population-based study / Factores asociados con el tratamiento oportuno de la malaria en la Amazonia brasileña: estudio de 10 años basado en la población / Fatores associados ao tratamento precoce da malária na Amazônia brasileira: um estudo populacional de 10 anos

ABSTRACT Objective To identify factors associated with timely treatment of malaria in the Brazilian Amazon. Malaria, despite being treatable, has proven difficult to control and continues to be an important public health problem globally. Brazil accounted for almost half of the 427 000 new malaria cases notified in the Americas in 2013. Methods This was a cross-sectional study using secondary data on all notified malaria cases for the period from 2004 - 2013. Timely treatment was considered to be all treatment started within 24 hours of symptoms onset. Multivariate logistic regression was used to identify independent factors associated with timely treatment. Results The proportion of cases starting treatment on a timely basis was 41.1%, tending to increase in more recent years (OR = 1.40; 95%CI: 1.37 - 1.42 in 2013). Furthermore, people starting within < 24 hours were more likely to: reside in the states of Rondônia (OR = 1.50; 95%CI: 1.49 - 1.51) or Acre (OR = 1.53; 95%CI: 1.55 - 1.57); be 0 - 5 years of age (OR = 1.39; 95%CI: 1.34 - 1.44) or 6 - 14 years of age (OR = 1.34; 95%CI: 1.32 - 1.36); be indigenous (OR = 1.41; 95%CI: 1.37 - 1.45); have a low level of schooling (OR = 1.20; 95%CI: 1.19 - 1.22); and be diagnosed by active detection (OR = 1.39; 95%CI: 1.38 - 1.39). Conclusion In the Brazilian Amazon area, individuals were more likely to have timely treatment of malaria if they were young, residing in Acre or Rondônia states, have little schooling, and be identified through active detection. Identifying groups vulnerable to late treatment is important for preventing severe cases and malaria deaths.

RESUMEN Objetivo Determinar los factores asociados con el tratamiento oportuno de la malaria en la Amazonia brasileña. La malaria, a pesar de que es tratable, ha resultado difícil de controlar y sigue siendo un problema importante de salud pública mundial. En Brasil se notificaron casi la mitad de los 427 000 nuevos casos de malaria en la Región de las Américas en el 2013. Métodos Se realizó un estudio transversal que utilizó datos secundarios de todos los casos notificados de malaria en el período 2004-2013. Se entendió como tratamiento oportuno todo tratamiento iniciado en las 24 horas posteriores a la aparición de los síntomas. Para determinar los factores independientes asociados con el tratamiento oportuno, se usó el método de regresión logística multifactorial. Resultados La proporción de casos en los que se inició el tratamiento oportunamente fue de 41,1%, con una tendencia ascendente en los últimos años (razón de posibilidades [OR] = 1,40; IC 95%: 1,37 - 1,42 en el 2013). Además, en las personas que comenzaron el tratamiento menos de 24 horas después de la aparición de los síntomas era mayor la probabilidad de que residieran en los estados de Rondônia (OR = 1,50; IC 95%: 1,49 - 1,51) o Acre (OR = 1,53; IC 95%: 1,55 - 1,57); también era mayor la probabilidad de que tuvieran entre 0 y 5 años (OR = 1,39; IC 95%: 1,34 - 1,44) o entre 6 y 14 años (OR = 1,34; IC 95%: 1,32 - 1,36); fueran indígenas (OR = 1,41; IC 95%: 1,37 - 1,45); tuvieran un nivel bajo de escolarización (OR = 1,20; IC 95%: 1,19 - 1,22) y hubieran sido diagnosticadas por detección activa (OR = 1,39; IC 95%: 1,38 - 1,39). Conclusiones En la zona de la Amazonia brasileña, era más probable que las personas que iniciaban oportunamente el tratamiento contra la malaria fueran jóvenes, residieran en los estados de Acre o Rondônia, tuvieran un nivel bajo de escolarización y fueran detectadas mediante la detección activa. La identificación de los grupos vulnerables al tratamiento tardío es importante para prevenir los casos graves y las muertes por malaria.

RESUMO Objetivo Identificar os fatores associados ao tratamento precoce da malária na Amazônia brasileira. Embora seja tratável, a malária tem sido difícil de controlar e continua a representar um importante problema de saúde pública em escala mundial. Em 2013, o Brasil registrou quase a metade dos 427.000 novos casos de malária notificados nas Américas. Métodos Este foi um estudo transversal que utilizou dados secundários sobre todos os casos de malária notificados no período de 2004 a 2013. O tratamento precoce foi definido como todo tratamento iniciado nas primeiras 24 horas desde o surgimento dos sintomas. Utilizamos a regressão logística multivariada para identificar fatores independentes associados ao tratamento precoce. Resultados A proporção de casos que iniciaram tratamento precoce foi de 41,1%, tendendo a aumentar em anos mais recentes (odds ratio [OR] = 1,40; IC 95%: 1,37 - 1,42 em 2013). Além disso, as pessoas que iniciaram o tratamento em menos de 24 horas tiveram maior probabilidade de: residir nos estados de Rondônia (OR = 1,50; IC 95%: 1,49 - 1,51) ou Acre (OR = 1,53; IC 95%: 1,55 - 1,57); ter entre 0 e 5 anos de idade (OR = 1,39; IC 95%: 1,34 - 1,44) ou entre 6 e 14 anos de idade (OR = 1,34; IC 95%: 1,32 - 1,36); ser indígena (OR = 1,41; IC 95%: 1,37 - 1,45); ter um baixo nível de escolaridade (OR = 1,20; IC 95%: 1,19 - 1,22); e ser diagnosticado por meio da detecção ativa (OR = 1,39; IC 95%: 1,38 - 1,39). Conclusão Na região da Amazônia brasileira, as pessoas têm uma maior probabilidade de receber tratamento precoce para a malária se forem jovens, residirem nos estados do Acre ou de Rondônia, tiverem um baixo nível de escolaridade e forem identificadas através da detecção ativa. A identificação de grupos vulneráveis ao tratamento tardio é importante para prevenir os casos graves e as mortes decorrentes da malária.

Factors associated with timely treatment of malaria in the Brazilian Amazon: a 10-year population-based study / Fatores associados ao trata¬mento precoce da malária na Amazônia brasileira: um estudo populacional de 10 anos / Factores asociados con el tratamiento oportuno de la malaria en la Amazonia brasileña: estudio de 10 años basado en la población

Objective. To identify factors associated with timely treatment of malaria in the Brazilian Amazon. Malaria, despite being treatable, has proven difficult to control and continues to be an important public health problem globally. Brazil accounted for almost half of the 427 000 new malaria cases notified in the Americas in 2013. Methods. This was a cross-sectional study using secondary data on all notified malaria cases for the period from 2004 – 2013. Timely treatment was considered to be all treatment started within 24 hours of symptoms onset. Multivariate logistic regression was used to identify independent factors associated with timely treatment. Results. The proportion of cases starting treatment on a timely basis was 41.1%, tending to increase in more recent years (OR = 1.40; 95%CI: 1.37 – 1.42 in 2013). Furthermore, people starting within < 24 hours were more likely to: reside in the states of Rondônia (OR = 1.50; 95%CI: 1.49 – 1.51) or Acre (OR = 1.53; 95%CI: 1.55 – 1.57); be 0 – 5 years of age (OR = 1.39; 95%CI: 1.34 – 1.44) or 6 – 14 years of age (OR = 1.34; 95%CI: 1.32 – 1.36); be indigenous (OR = 1.41; 95%CI: 1.37 – 1.45); have a low level of schooling (OR = 1.20; 95%CI: 1.19 – 1.22); and be diagnosed by active detection (OR = 1.39; 95%CI: 1.38 – 1.39). Conclusion. In the Brazilian Amazon area, individuals were more likely to have timely treatment of malaria if they were young, residing in Acre or Rondônia states, have little schooling, and be identified through active detection. Identifying groups vulnerable to late treatment is important for preventing severe cases and malaria deaths.

Objetivo. Determinar los factores asociados con el tratamiento oportuno de la malaria en la Amazonia brasileña. La malaria, a pesar de que es tratable, ha resultado difícil de controlar y sigue siendo un problema importante de salud pública mundial. En Brasil se notificaron casi la mitad de los 427 000 nuevos casos de malaria en la Región de las Américas en el 2013. Métodos. Se realizó un estudio transversal que utilizó datos secundarios de todos los casos notificados de malaria en el período 2004–2013. Se entendió como tratamiento oportuno todo tratamiento iniciado en las 24 horas posteriores a la aparición de los síntomas. Para determinar los factores independientes asociados con el tratamiento oportuno, se usó el método de regresión logística multifactorial. Resultados. La proporción de casos en los que se inició el tratamiento oportunamente fue de 41,1%, con una tendencia ascendente en los últimos años (razón de posibilidades [OR] = 1,40; IC 95%: 1,37 – 1,42 en el 2013). Además, en las personas que comenzaron el tratamiento menos de 24 horas después de la aparición de los síntomas era mayor la probabilidad de que residieran en los estados de Rondônia (OR = 1,50; IC 95%: 1,49 – 1,51) o Acre (OR = 1,53; IC 95%: 1,55 – 1,57); también era mayor la probabilidad de que tuvieran entre 0 y 5 años (OR = 1,39; IC 95%: 1,34 – 1,44) o entre 6 y 14 años (OR = 1,34; IC 95%: 1,32 – 1,36); fueran indígenas (OR = 1,41; IC 95%: 1,37 – 1,45); tuvieran un nivel bajo de escolarización (OR = 1,20; IC 95%: 1,19 – 1,22) y hubieran sido diagnosticadas por detección activa (OR = 1,39; IC 95%: 1,38 – 1,39). Conclusiones. En la zona de la Amazonia brasileña, era más probable que las personas que iniciaban oportunamente el tratamiento contra la malaria fueran jóvenes, residieran en los estados de Acre o Rondônia, tuvieran un nivel bajo de escolarización y fueran detectadas mediante la detección activa. La identificación de los grupos vulnerables al tratamiento tardío es importante para prevenir los casos graves y las muertes por malaria.

Objetivo. Identificar os fatores associados ao tratamento precoce da malária na Amazônia brasileira. Embora seja tratável, a malária tem sido difícil de controlar e continua a representar um importante problema de saúde pública em escala mundial. Em 2013, o Brasil registrou quase a metade dos 427.000 novos casos de malária notificados nas Américas. Métodos. Este foi um estudo transversal que utilizou dados secundários sobre todos os casos de malária notificados no período de 2004 a 2013. O tratamento precoce foi definido como todo tratamento iniciado nas primeiras 24 horas desde o surgimento dos sintomas. Utilizamos a regressão logística multivariada para identificar fatores independentes associados ao tratamento precoce. Resultados. A proporção de casos que iniciaram tratamento precoce foi de 41,1%, tendendo a aumentar em anos mais recentes (odds ratio [OR] = 1,40; IC 95%: 1,37 – 1,42 em 2013). Além disso, as pessoas que iniciaram o tratamento em menos de 24 horas tiveram maior probabilidade de: residir nos estados de Rondônia (OR = 1,50; IC 95%: 1,49 – 1,51) ou Acre (OR = 1,53; IC 95%: 1,55 – 1,57); ter entre 0 e 5 anos de idade (OR = 1,39; IC 95%: 1,34 – 1,44) ou entre 6 e 14 anos de idade (OR = 1,34; IC 95%: 1,32 – 1,36); ser indígena (OR = 1,41; IC 95%: 1,37 – 1,45); ter um baixo nível de escolaridade (OR = 1,20; IC 95%: 1,19 – 1,22); e ser diagnosticado por meio da detecção ativa (OR = 1,39; IC 95%: 1,38 – 1,39). Conclusão. Na região da Amazônia brasileira, as pessoas têm uma maior probabilidade de receber tratamento precoce para a malária se forem jovens, residirem nos estados do Acre ou de Rondônia, tiverem um baixo nível de escolaridade e forem identificadas através da detecção ativa. A identificação de grupos vulneráveis ao tratamento tardio é importante para prevenir os casos graves e as mortes decorrentes da malária.

Factors associated with the occurrence of Triatoma sordida (Hemiptera: Reduviidae) in rural localities of Central-West Brazil

This study estimates the factors of artificial environments (houses and peridomestic areas) associated with Triatoma sordida occurrence. Manual searches for triatomines were performed in 136 domiciliary units (DUs) in two rural localities of Central-West Brazil. For each DU, 32 structural, 23 biotic and 28 management variables were obtained. Multiple logistic regression analysis was performed in order to identify statistically significant variables associated with occurrence of T. sordida in the study areas. A total of 1,057 specimens (99% in peridomiciles, mainly chicken coops) of T. sordida were collected from 63 DUs (infestation: 47%; density: ~8 specimens/DU; crowding: ~17 specimens/infested DU; colonisation: 81%). Only six (0.6%) out of 945 specimens examined were infected with Trypanosoma cruzi. The final adjusted logistic regression model indicated that the probability of T. sordida occurrence was higher in DU with wooden chicken coops, presence of > 30 animals in wooden corrals, presence of wood piles and presence of food storeroom. The results show the persistence of T. sordida in peridomestic habitats in rural localities of Central-West Brazil. However, the observed low intradomestic colonisation and minimal triatomine infection rates indicate that T. sordida has low potential to sustain high rates of T. cruzi transmission to residents of these localities.

Self-reported compliance with last malaria treatment and occurrence of malaria during follow-up in a Brazilian Amazon population.

The objective of this study was to describe the association between self-reported compliance with last malaria treatment (CMT) and occurrence of malaria during follow-up, controlling for current risk factors. We conducted a prospective open cohort study in Leonislândia, a rural area of Peixoto de Azevedo City, in the Amazon region of Mato Grosso, Brazil. A total of 414 individuals were interviewed at baseline regarding CMT and followed-up for either 8 or 4 months to assess malaria incidence. The associations between CMT and occurrence of malaria were examined through multiple linear regression (when the outcome was malaria episode frequency) or Cox regression (when the outcome was time to malaria onset). Poor CMT (prior to baseline) was identified as an important predictor of the occurrence of subsequent malaria episodes during follow-up among individuals with an indication of being less immune - those whose first malaria episode was relatively recent or those who had an increased number of malaria episodes during the last 2 years. Moreover, surprisingly, it seems that for individuals who are probably more immune (individuals who had experienced their first malaria episode more than 4.5 years previously or those with few or no malaria episodes during the last 2 years), CMT was found to be a poor predictor of increased risk of subsequent malaria. These findings provide compelling evidence for the need to further study CMT and its effect on malaria outcomes.