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OBJECTIVE: To analyse hospital case fatality and mortality related to Chagas disease (CD) in Brazil, 2000-2019. METHOD: This is a mixed ecological study with spatial and temporal trends, based on national population data from the Brazilian Ministry of Health - hospital admissions (HA) and death certificates (DC). Records with CD as a primary or secondary cause of death in HA and/or as an underlying or associated cause of death in DC were evaluated. Temporal trends were analysed by Joinpoint regression and the spatial distribution of age- and gender-adjusted rates, spatial moving averages, and standardized morbidity ratios. RESULTS: There were a total of 4,376 HA due to CD resulting in death in Brazil, with a hospital case fatality rate of 0.11/100,000 inhabitants. The Southeast region had the highest rate (63.9%, n = 2,796; 0.17/100,000 inhabitants). The general trend for this indicator in Brazil is upwards (average annual percentage change [AAPC] 7.5; 95% confidence interval [CI] 5.3 to 9.9), with increases in the North, Northeast and Southeast regions. During the same period 122,275 deaths from CD were registered in DC, with a mortality rate of 3.14/100,000 inhabitants. The highest risk of CD-related death was found among men (relative risk [RR] 1.27) and Afro-Brazilians (RR 1.63). There was a downward trend in CD mortality in the country (AAPC - 0.7%, 95%CI -0.9 to -0.5), with an increase in the Northeast region (AAPC 1.1%, 95%CI 0.6 to 1.6). Municipalities with a very high Brazilian Deprivation Index tended to show an increase in mortality (AAPC 2.1%, 95%CI 1.6 to 2.7), while the others showed a decrease. CONCLUSION: Hospital case fatality and mortality due to CD are a relevant public health problem in Brazil. Differences related to gender, ethnicity, and social vulnerability reinforce the need for comprehensive care, and to ensure equity in access to health in the country. Municipalities, states, and regions with indicators that reveal higher morbidity and mortality need to be prioritized.
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Doença de Chagas , Mortalidade Hospitalar , Humanos , Brasil/epidemiologia , Doença de Chagas/mortalidade , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Mortalidade Hospitalar/tendências , Adolescente , Idoso , Adulto Jovem , Pré-Escolar , Criança , Lactente , Análise Espaço-Temporal , Recém-NascidoRESUMO
We analyzed epidemiologic characteristics and distribution of 492 deaths related to Chagas disease and coronavirus disease (COVID-19) co-infection in Brazil during MarchâDecember 2020. Cumulative co-infected death rates were highest among advanced age groups, persons of Afro-Brazilian ethnicity and with low education levels, and geographically distributed mainly in major Chagas diseaseâendemic areas.
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COVID-19 , Doença de Chagas , Coinfecção , Humanos , Brasil/epidemiologia , Coinfecção/epidemiologia , Doença de Chagas/epidemiologiaRESUMO
Objective: To identify nationwide temporal trends and spatial patterns of gastric cancer-related mortality in Brazil. Methods: An ecological study was performed using death certificates registered from 2000 to 2019 in which gastric cancer was recorded as any cause of death (an underlying or associated cause). Trends over time were assessed using joinpoint regression models. Spatial and spatiotemporal clusters were identified by Kulldorff's space-time scan statistics to identify high-risk areas. Results: In 276 897/22 663 091 (1.22%) death certificates gastric cancer was recorded as any cause of death. Age-adjusted gastric cancer-related mortality increased significantly over time (annual percentage change [APC]: 0.7, 95% confidence interval [CI]: 0.5 to 0.8). The increase in mortality was more pronounced in the less-developed North and Northeast Regions (North Region, APC: 3.1, 95% CI: 2.7 to 3.5; Northeast Region, APC: 3.1, 95% CI: 2.5 to 3.7). Eight spatiotemporally associated high-risk clusters of gastric cancer-related mortality were identified in the North, South, Northeast and Central-West Regions, as well as a major cluster covering a wide geographical range in the South and Southeast Regions of Brazil during the first years of the study period (2000 to 2009). Conclusions: More recently, during 2010 to 2019, clusters of gastric cancer have been identified in the Northeast Region. The nationwide increase in mortality in this analysis of 20 years of data highlights the persistently high burden of gastric cancer in Brazil, especially in socioeconomically disadvantaged regions. The identification of these areas where the population is at high risk for gastric cancer-related mortality emphasizes the need to develop effective and intersectoral control measures.
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BACKGROUND: Gastric cancer (GC) is an important cause of morbidity and mortality worldwide. However, population-based data on GC mortality dynamics in low and middle income countries are scarce. METHODS: We analyzed GC mortality in Brazil based on all GC-related deaths registered 2000-2015. RESULTS: A total of 17,374,134 deaths were recorded, with GC identified in 214,808 (1.24%) cases-203,941 (94.9%) as underlying cause, and 10,867 (5.1%) as associated cause of death. Adjusted rates for age and sex was 6.85 deaths/100,000 inhabitants [95% confidence interval (CI) 6.73-6.97]. The highest mortality rates were found in males [10.00; rate ratio (RR) 1.85; 95% CI 1.78-1.91; p < 0.0001] and patients ≥ 45 years of age (24.98; RR 3.79; 95% CI 3.55-4.05; p < 0.0001). The South (7.56; RR 1.62; 95% CI 1.50-1.76; p < 0.0001) and Southeast (7.36; RR 1.59; 95% CI 1.48-1.71; p < 0.0001) regions had the highest regional rates. Spatial and spatiotemporal high-risk mortality areas in 2004-2007 were located mainly in the South, Southeast, and Central-West regions. After 2008, the Northeast region became a high-risk area, especially Ceará State. CONCLUSION: GC remains a significant public health problem with high mortality burden and unequal distribution in Brazilian states. The new patterns in poorer regions and the high risk in some specific populations show a clear process of epidemiological transition over time. There is a need to strengthen nationwide epidemiological monitoring, surveillance, prevention, and control for GC in the country.
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Neoplasias Gástricas/mortalidade , Adolescente , Adulto , Fatores Etários , Idoso , Brasil/epidemiologia , Demografia , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Morbidade , Prognóstico , Fatores Sexuais , Neoplasias Gástricas/epidemiologia , Taxa de Sobrevida , Fatores de Tempo , Adulto JovemRESUMO
BACKGROUND: Increasing resistance of head lice against neurotoxic agents and safety concerns have led to the search for treatment alternatives. Dimeticones with a physical mode of action are safe, and bear a reduced risk for the development of resistance. METHODS: We performed in vitro bioassays to assess pediculicidal and ovicidal activities of a new dimeticone-based product, and a randomized controlled clinical trial to assess efficacy, following 10 min application. Of 153 individuals screened, 100 participants with active head louse infestations were randomly assigned to treatment with either a dimeticone-based test product, or a 0.5% permethrin-based reference product (50 participants per group). Participants received two topical applications of either the test (10 min) or reference products (45 min) at days 0 and 7 or 8. Outcome measures included the efficacies of treatment and their safety, as well as global and local tolerability at baseline, and days 1, 7, and 10. RESULTS: After 10 min exposure, all lice treated with the dimeticone test product were classified as non-viable in the in vitro assay. Ovicidal activity after treatment of eggs with the dimeticone test product was 96.8%. In the clinical trial, 96 patients completed all study visits. In the full analysis set (FAS) population, on day 1 after one application, 98% of patients were cured in the test group, as compared to 84% cured in the reference group. All participants in both groups were free of head lice on day 10, following two applications (100% cure rate). In total, 42 adverse events (AEs) in 23 patients of both treatment groups were recorded, with the majority of AEs classified as mild. CONCLUSIONS: We have shown a high level of pediculicidal and ovicidal activity, and clinical efficacy and safety, of a brief application of a new dimeticone-based product. The short application time and reduced risk for the development of resistance are key drivers for improved patients' compliance. TRIAL REGISTRATION: EU Clinical Trials Register EudraCT 2016-004635-20 . Registered 14 November 2016.
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Dimetilpolisiloxanos/uso terapêutico , Inseticidas/uso terapêutico , Infestações por Piolhos/tratamento farmacológico , Pediculus/efeitos dos fármacos , Permetrina/uso terapêutico , Dermatoses do Couro Cabeludo/tratamento farmacológico , Administração Tópica , Adolescente , Adulto , Animais , Criança , Pré-Escolar , Dimetilpolisiloxanos/efeitos adversos , Dimetilpolisiloxanos/farmacologia , Feminino , Humanos , Técnicas In Vitro , Inseticidas/efeitos adversos , Inseticidas/farmacologia , Masculino , Permetrina/farmacologia , Método Simples-CegoRESUMO
Tungiasis is a zoonosis neglected by authorities, health professionals, and affected populations. Domestic, synanthropic, and sylvatic animals serve as reservoirs for human infestation, and dogs are usually considered a main reservoir in endemic communities. To describe the seasonal variation and the persistence of tungiasis in dogs, we performed quarterly surveys during a period of 2 years in a tourist village in the municipality of Ilhéus, Bahia State, known to be endemic for tungiasis. Prevalence in dogs ranged from 62.1% (43/66) in August 2013 to 82.2% (37/45) in November 2014, with no significant difference (p = 0.06). The prevalence of infestation remained high, regardless of rainfall patterns. Of the 31 dogs inspected at all surveys, period prevalence was 94% (29/31; 95% CI 79.3-98.2%) and persistence of infestation indicator [PII] was high (median PII = 6 surveys, q1 = 5, q3 = 7). Dogs < 1 year of age had a higher mean prevalence of 84.5%, as compared with 69.3% in the older dogs. No significant difference was found between the risk of infestation and age or sex (p = 0.61). Our data indicate that canine tungiasis persisted in the area during all periods of the year. The seasonal variation described in human studies from other endemic areas was not observed, most probably due to different rainfall patterns throughout the year. The study has important implications for the planning of integrated control measures in both humans and animal reservoirs, considering a One Health approach.
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Doenças do Cão/parasitologia , Tunga/fisiologia , Tungíase/parasitologia , Tungíase/veterinária , Animais , Brasil/epidemiologia , Doenças do Cão/epidemiologia , Cães , Doenças Endêmicas/estatística & dados numéricos , Doenças Endêmicas/veterinária , Meio Ambiente , Feminino , Humanos , Estudos Longitudinais , Masculino , Prevalência , Estações do Ano , Inquéritos e Questionários , Tunga/genética , Tungíase/epidemiologiaRESUMO
Soil-transmitted helminth (STH) infections are widely distributed in tropical and subtropical areas, including Brazil. We performed a nationwide population-based study including all deaths in Brazil from 2000 to 2011, in which STHs (ascariasis, trichuriasis and/or hookworm infection) were mentioned on death certificates, either as underlying or as associated causes of death. Epidemiological characteristics, time trends and spatial analysis of STH-related mortality were analysed. STHs was identified on 853/12 491 280 death certificates: 827 (97·0%) deaths related to ascariasis, 25 (2·9%) to hookworm infections, and 1 (0·1%) to trichuriasis. The average annual age-adjusted mortality rate was 0·34/1 000 000 inhabitants (95% confidence interval: 0·27-0·44). Females, children <10 years of age, indigenous ethnic groups and residents in the Northeast region had highest STH-related mortality rates. Nationwide mortality decreased significantly over time (annual percent change: -5·7%; 95% CI: -6·9 to -4·4), with regional differences. We identified spatial high-risk clusters for STH-related mortality mainly in the North, Northeast and South regions. Diseases of the digestive system and infectious/parasitic diseases were the most commonly associated causes of death mentioned in the STH-related deaths. Despite decreasing mortality in Brazil, a considerable number of deaths is caused by STHs, with ascariasis responsible for the vast majority. There were marked regional differences, affecting mainly children and vulnerable populations.
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Helmintíase/mortalidade , Solo/parasitologia , Adolescente , Adulto , Idoso , Ascaríase/epidemiologia , Ascaríase/mortalidade , Ascaríase/parasitologia , Ascaríase/transmissão , Brasil/epidemiologia , Criança , Pré-Escolar , Feminino , Geografia , Helmintíase/epidemiologia , Helmintíase/parasitologia , Helmintíase/transmissão , Infecções por Uncinaria/epidemiologia , Infecções por Uncinaria/mortalidade , Infecções por Uncinaria/parasitologia , Infecções por Uncinaria/transmissão , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Doenças Negligenciadas , Análise Espacial , Tricuríase/epidemiologia , Tricuríase/mortalidade , Tricuríase/parasitologia , Tricuríase/transmissão , Adulto JovemRESUMO
OBJECTIVE: To describe mortality from neglected tropical diseases (NTDs) in Brazil, 2000-2011. METHODS: We extracted information on cause of death, age, sex, ethnicity and place of residence from the nationwide mortality information system at the Brazilian Ministry of Health. We selected deaths in which the underlying cause of death was a neglected tropical disease (NTD), as defined by the World Health Organization (WHO) and based on its International statistical classification of diseases and related health problems, 10th revision (ICD-10) codes. For specific NTDs, we estimated crude and age-adjusted mortality rates and 95% confidence intervals (CI). We calculated crude and age-adjusted mortality rates and mortality rate ratios by age, sex, ethnicity and geographic area. FINDINGS: Over the 12-year study period, 12 491 280 deaths were recorded; 76 847 deaths (0.62%) were caused by NTDs. Chagas disease was the most common cause of death (58 928 deaths; 76.7%), followed by schistosomiasis (6319 deaths; 8.2%) and leishmaniasis (3466 deaths; 4.5%). The average annual age-adjusted mortality from all NTDs combined was 4.30 deaths per 100 000 population (95% CI: 4.21-4.40). Rates were higher in males: 4.98 deaths per 100 000; people older than 69 years: 33.12 deaths per 100 000; Afro-Brazilians: 5.25 deaths per 100 000; and residents in the central-west region: 14.71 deaths per 100 000. CONCLUSION: NTDs are important causes of death and are a significant public health problem in Brazil. There is a need for intensive integrated control measures in areas of high morbidity and mortality.
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Doenças Negligenciadas/mortalidade , Adolescente , Adulto , Distribuição por Idade , Idoso , Brasil/epidemiologia , Causas de Morte , Criança , Pré-Escolar , Etnicidade , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Distribuição por Sexo , Adulto JovemRESUMO
We analyzed spatiotemporal patterns of 8,756 schistosomiasis-related deaths in Brazil during 2000-2011 and identified high-risk clusters of deaths, mainly in highly schistosomiasis-endemic areas along the coast of Brazil's Northeast Region. Schistosomiasis remains a neglected public health problem with a high number of deaths in disease-endemic and emerging focal areas.
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Doenças Endêmicas , Saúde Pública/métodos , Esquistossomose/transmissão , Brasil/epidemiologia , Humanos , Esquistossomose/epidemiologia , Análise Espaço-TemporalRESUMO
INTRODUCTION: Tocantins State in north Brazil remains endemic for leprosy, with high detection rates and occurrence of disabilities at diagnosis. We analyzed trends and identified factors associated with the occurrence of disability at diagnosis. METHODS: We analyzed data from the Notifiable Diseases Information System (SINAN). We included new leprosy cases resident in Tocantins, diagnosed between 2001 and 2012. RESULTS: During the study period, there were 14,532 new leprosy cases residing in Tocantins. Of these, 12,328 (84.9%) were assessed for degree of disability at diagnosis: 9,166 (74.4%) with Grade 0; 2,498 (20.3%) with Grade 1; and 664 (5.4%) with Grade 2 disability. The proportion of disability Grade 2 remained stable over time. Factors associated with Grade 2 at diagnosis included: male gender (RR = 2.24; CI: 1.89 - 2.65), age ≥ 45 years (RR = 5.31; CI: 3.21 - 8, 29), illiteracy (RR = 6.70; CI: 3.75 - 11.95), diagnosis made through mass campaigns (RR = 2.40; CI: 1.50 - 3.85), and residency in rural areas (RR = 1.28; CI: 1.06 - 1.5). Grade 2 disabilities at diagnosis were also more common in the presence of ≥ 5 five skin lesions (RR = 4.42, CI: 3.74 - 5.21), leprosy reactions (RR = 2.78; CI: 2.31 - 3.33), multibacillary disease (RR = 7.43; CI: 6.11 - 9.04), and lepromatous clinical form (RR = 16.53, CI: 12.10 - 20.60). CONCLUSIONS: The leprosy control programme should focus on socio-economically disadvantaged and difficult-to-reach population groups. Leprosy mass campaigns and other collective examinations, to be integrated with other disease control programmes, may be an effective means to reduce disability degree at diagnosis.
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Doenças Endêmicas/estatística & dados numéricos , Hanseníase/complicações , Hanseníase/epidemiologia , Adolescente , Adulto , Brasil/epidemiologia , Notificação de Doenças , Feminino , Indicadores Básicos de Saúde , Humanos , Hanseníase/diagnóstico , Masculino , Pessoa de Meia-Idade , Fatores de Tempo , Adulto JovemRESUMO
OBJECTIVE: To estimate the prevalence of Chagas disease in pregnant women and the risk of congenital transmission of Trypanosoma cruzi infection in Brazil, through a systematic review and meta-analysis. METHODS: We searched electronic databases, grey literature and reference lists of included publications to identify epidemiological studies on the prevalence of Chagas disease in pregnant women and on the congenital transmission rate of T. cruzi infection in Brazil published between January 1980 and June 2013. Pooled estimates and 95% confidence intervals (95% CIs) were calculated using fixed- and random-effects models. RESULTS: Sixteen articles were included - 12 studies on the prevalence of Chagas disease in pregnant women (549,359 pregnant women) and nine on congenital transmission rates (1687 children born to infected mothers). Prevalence of Chagas disease in pregnant women ranged from 0.1% to 8.5%, and congenital transmission rates from 0% to 5.2%. The pooled prevalence of Chagas disease among pregnant women across studies was 1.1% (95% CI: 0.6-2.0); the pooled congenital transmission rate was 1.7% (95% CI: 0.9-3.1). In 2010, 34,629 pregnant women were estimated to be infected with T. cruzi, and 312-1073 children born (mean: 589 cases) with congenital infection. CONCLUSION: Congenital Chagas disease is a neglected public health problem in Brazil. Systematic congenital Chagas disease control programs through routine prenatal screening for T. cruzi should be widely implemented in Brazil's endemic areas, to identify infected pregnant women and newborns at risk of congenital infection.
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Doença de Chagas/epidemiologia , Transmissão Vertical de Doenças Infecciosas , Complicações Parasitárias na Gravidez/epidemiologia , Trypanosoma cruzi , Brasil/epidemiologia , Doença de Chagas/congênito , Doença de Chagas/parasitologia , Doença de Chagas/transmissão , Feminino , Humanos , Recém-Nascido , Gravidez , Complicações Parasitárias na Gravidez/etiologia , Complicações Parasitárias na Gravidez/parasitologiaRESUMO
Scabies is a neglected tropical disease and has been highlighted as a target for control. Sarcoptic mange affects animals, but mange is also considered a zoonosis. We present rapid assessment data on scabies and sarcoptic mange collected from key informants via a web-based questionnaire in Ceará State (1265 data entries). A total of 181/184 (98.3%) municipalities reported the occurrence of human scabies; 149 (80.9%) current occurrence; 168 (91.3%) severe cases; and 113 (61.4%) severe cases currently. Sarcoptic mange was reported from 149/184 (80.9%) municipalities, and severe mange from 128 (69.9%), most commonly in dogs (117 municipalities), cats (79), pigs (17), cattle (15), horses (15), and goats (2). Respondents from 171 (92.9%) municipalities observed seasonality of occurrence. Scabies and sarcoptic mange are important public health issues in a northeast Brazilian state. The wide distribution of severe cases requires an integrated One Health approach effectively and sustainably to reduce the disease burden.
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Data on the temporal and spatial evolution of SARS-CoV-2 and local control measures and their effects on morbidity and mortality patterns in rural Brazil are scarce. We analyzed the data from case notification systems, epidemiological investigation reports, and municipal decrees in Itapajé, a small municipality in Ceará State in northeast Brazil. For spatial and spatio-temporal analyses, cases and deaths were mapped. There were a total of 3020 cases of COVID-19, recorded between April 2020 and December 2021; 135 (4.5%) died. The cumulative incidence and mortality rates were 5650.3 cases and 252.6 deaths per 100,000 people, respectively. The index case of SARS-CoV-2 in Itapajé was diagnosed in March 2020. The first peak of cases and deaths occurred in May 2020. The second wave peaked in May 2021, with the highest number of deaths in March 2021. According to the spatial analysis, the highest density of cases and deaths occurred in the central urban areas. In these areas, there were also the clusters of highest risk according to the spatio-temporal analyses. The municipal government issued 69 decrees on restriction measures, surveillance, and the maintenance of social isolation as a response to the pandemic. The spread of the SARS-CoV-2 pandemic in Itapajé mirrored the dynamics in large metropolitan regions, going from central neighborhoods of low socio-economic status to the wealthier peripheries.
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PURPOSE OF REVIEW: Features of endemic scabies are specific in resource-poor and underprivileged communities, with implications for control measures on the community level. In this review, these special aspects are addressed. RECENT FINDINGS: Scabies is endemic in many resource-poor communities, with a prevalence of 20% and higher. Transmission is influenced by social attitudes, migration, access to healthcare services, housing conditions, hygiene conditions, and crowding. Endemic scabies occurs with severe infestations, complications, and sequels, mainly in children. Sleep loss as a result of scabies-related itching is common. Complications include secondary infections by group A streptococci and acute poststreptococcal glomerulonephritis. Shame, restriction of leisure activities, and stigmatization are common. Treatment of scabies includes a variety of topical compounds, but control on the community level is not an easy task. As ivermectin kills a variety of other parasites, this oral drug is increasingly used for mass treatment. Intervention should address socioemotional aspects using an integrated approach with professionals from different areas, and the community. SUMMARY: Scabies is a neglected disease and needs to be perceived as an important public health problem causing morbidity in many resource-poor communities. Future work on epidemiology, clinical aspects, transmission dynamics, socioeconomic aspects, and sustainable control in resource-poor communities is needed.
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Escabiose , Efeitos Psicossociais da Doença , Países em Desenvolvimento , Humanos , Áreas de Pobreza , Fatores de Risco , Escabiose/epidemiologia , Escabiose/prevenção & controle , Fatores SocioeconômicosRESUMO
BACKGROUND: Systematic data on the occurrence of tungiasis are scarce. METHODS: We analyzed data on tungiasis in humans and animals from all municipalities of Ceará State, Northeast Brazil, using a rapid assessment questionnaire. RESULTS: Among the 184 municipalities, 181 (98.3%) reported tungiasis in the past (before 2021) or currently, 120 (65.2%) reported current occurrence, 155 (84.2%) reported severe cases in the past or currently, 47 (25.5 %) reported severe cases currently, and 132 (71.7%) reported tungiasis in animals. CONCLUSIONS: Tungiasis is a significant public health concern in Ceará. A One Health approach is required to reduce the disease burden in humans and animals.
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Tungíase , Animais , Humanos , Tungíase/diagnóstico , Tungíase/epidemiologia , Brasil/epidemiologia , Inquéritos e Questionários , CidadesRESUMO
BACKGROUND: To analyze the temporal evolution of research on Neglected Tropical Diseases (NTDs) published by the Journal of the Brazilian Society of Tropical Medicine (JBSTM). METHODS: We performed an analysis of the scientific production in JBSTM on NTDs using an advanced search, which included authors' descriptors, title, and abstract, and by combining specific terms for each NTDs from 1991 to 2021. Data related to authors, countries of origin, institutions, and descriptors, were evaluated and analyzed over time. Bibliographic networks were constructed using VOSviewer 1.6.16. RESULTS: The JBSTM published 4,268 scientific papers during this period. Of these 1,849 (43.3%) were related to NTDs. The number of publications on NTDs increased by approximately 2.4-fold, from 352 (total 724) during 1991-2000 to 841 (total 2,128) during 2011-2021, despite the proportional reduction (48.6% versus 39.5%). The most common singular NTDs subject of publications included Chagas disease (31.4%; 581/1,849), leishmaniasis (25.5%, 411/1,849), dengue (9.4%, 174/1,849), schistosomiasis (9.0%; 166/1,849), and leprosy (6.5%, 120/1,849), with authorship mostly from Brazil's South and Southeast regions. CONCLUSIONS: Despite the proportional reduction in publications, JBSTM remains an important vehicle for disseminating research on NTDs during this period. There is a need to strengthen the research and subsequent publications on specific NTDs. Institutions working and publishing on NTDs in the country were concentrated in the South and Southeast regions, requiring additional investments in institutions in other regions of the country.
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Doença de Chagas , Hanseníase , Esquistossomose , Medicina Tropical , Humanos , Brasil , Doenças NegligenciadasRESUMO
OBJECTIVE: To describe patterns of spatial distribution of mortality associated with Chagas' disease in Brazil. METHODS: Nationwide study of all deaths in Brazil from 1999 to 2007, where Chagas' disease was recorded as a cause of death. Data were obtained from the national Mortality Information System of the Ministry of Health. We calculated the mean mortality rate for each municipality of residence in three-year intervals and the entire period. Empirical Bayes smoothing was used to minimise random variation in mortality rates because of the population size in the municipalities. To evaluate the existence of spatial autocorrelation, global and local Moran's I indices were used. RESULTS: The nationwide mean mortality rate associated with Chagas' disease was 3.37/100 000 inhabitants/year, with a maximum of 138.06/100 000 in one municipality. Independently from the statistical approach, spatial analysis identified a large cluster of high risk for mortality by Chagas' disease, involving nine states in the Central region of Brazil. CONCLUSION: This study defined geographical priority areas for the management of Chagas' disease and consequently reducing disease-associated mortality in Brazil. Different spatial-analytical approaches can be integrated to provide data for planning, monitoring and evaluating specific intervention measures.
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Doença de Chagas/mortalidade , Brasil/epidemiologia , Doença de Chagas/epidemiologia , Humanos , Incidência , Características de Residência , Fatores de RiscoRESUMO
OBJECTIVE: The Brazilian National Hansen's Disease Control Program recently identified clusters with high disease transmission. Herein, we present different spatial analytical approaches to define highly vulnerable areas in one of these clusters. METHOD: The study area included 373 municipalities in the four Brazilian states Maranhão, Pará, Tocantins and Piauí. Spatial analysis was based on municipalities as the observation unit, considering the following disease indicators: (i) rate of new cases/100,000 population, (ii) rate of cases <15 years/100,000 population, (iii) new cases with grade-2 disability/100,000 population and (iv) proportion of new cases with grade-2 disabilities. We performed descriptive spatial analysis, local empirical Bayesian analysis and spatial scan statistic. RESULTS: A total of 254 (68.0%) municipalities were classified as hyperendemic (mean annual detection rates >40 cases/100,000 inhabitants). There was a concentration of municipalities with higher detection rates in Pará and in the center of Maranhão. Spatial scan statistic identified 23 likely clusters of new leprosy case detection rates, most of them localized in these two states. These clusters included only 32% of the total population, but 55.4% of new leprosy cases. We also identified 16 significant clusters for the detection rate <15 years and 11 likely clusters of new cases with grade-2. Several clusters of new cases with grade-2/population overlap with those of new cases detection and detection of children <15 years of age. The proportion of new cases with grade-2 did not reveal any significant clusters. CONCLUSIONS: Several municipality clusters for high leprosy transmission and late diagnosis were identified in an endemic area using different statistical approaches. Spatial scan statistic is adequate to validate and confirm high-risk leprosy areas for transmission and late diagnosis, identified using descriptive spatial analysis and using local empirical Bayesian method. National and State leprosy control programs urgently need to intensify control actions in these highly vulnerable municipalities.
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Diagnóstico Tardio/estatística & dados numéricos , Doenças Endêmicas/estatística & dados numéricos , Hanseníase/epidemiologia , Hanseníase/transmissão , População Rural/estatística & dados numéricos , Brasil/epidemiologia , Análise por Conglomerados , Controle de Doenças Transmissíveis/organização & administração , Feminino , Nível de Saúde , Humanos , Hanseníase/diagnóstico , Masculino , Mycobacterium leprae/isolamento & purificação , Vigilância da População , Medição de Risco , Fatores de RiscoRESUMO
Pregnancies in women without knowledge of their HIV-positive status increase the risk of mother-to-child transmission, and of disease progression. This study aimed to characterize the frequency of multiple pregnancies and of HIV-positive children in the family, during HAART era. We analyzed data of a national multicenter cohort study among Brazilian children with AIDS diagnosed between 1999 and 2002. In total, 945 children and their 928 mothers were included. Five hundred and ninety (64.6%) women had a history of multiple pregnancies, and 49.5% attended prenatal care (mean: 3.5 consultations; SD 3.6). In 483 child cases, HIV status of the sibling was known; 130 (26.9%) of these were infected with HIV. In 38.5% of cases, the child with AIDS included in the cohort study was the first case in the family. Despite the overall positive results of the Brazilian control policy of HIV/AIDS, our study shows that HIV infection in pregnant women was often undetected and that consequently there was a high frequency of repeated HIV-infected children. There is a need to improve comprehensive prenatal and postnatal care of Brazilian women. HIV-affected families are most vulnerable and should be targeted by specific control programs, preventing additional HIV infections in other children.