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Hepatitis E virus (HEV) infection is a common cause of acute viral hepatitis in tropical regions. In Brazil, HEV G3 is the only genotype detected to date. Reports on HEV prevalence are heterogeneous. We aimed to compare the prevalence of anti-HEV among three populations living in the Brazilian Amazon basin. Two cross-sectional studies were conducted in urban, rural, and Yanomami indigenous areas. Plasma samples from 428 indigenous and 383 non-indigenous subjects were tested for anti-HEV IgG using enzyme-linked immunosorbent assays. The overall prevalence of anti-HEV was 6.8% (95%CI: 5.25-8.72), with 2.8% (12/428) found in the Yanomami areas, 3% (3/101) in an urban area, and 14.2% (40/282) in a rural area. Multivariate logistic analysis indicated that patients aged 31-45 years or ≥46 years are more likely to present anti-HEV positivity, with a respective aOR of 2.76 (95%CI: 1.09-7.5) and 4.27 (95%CI: 1.58-12.35). Furthermore, residence in a rural area (aOR: 7.67; 95%CI: 2.50-33.67) represents a relevant risk factor for HEV infection. Additional studies detecting HEV RNA in fecal samples from both humans and potential animal reservoirs are necessary to comprehensively identify risk factors associated with HEV exposure.

Hepatitis E virus (HEV) infection is a common cause of acute viral hepatitis in tropical regions. In Brazil, HEV G3 is the only genotype detected to date. Reports on HEV prevalence are heterogeneous. We aimed to compare the prevalence of anti-HEV among three populations living in the Brazilian Amazon basin. Two cross-sectional studies were conducted in urban, rural, and Yanomami indigenous areas. Plasma samples from 428 indigenous and 383 non-indigenous subjects were tested for anti-HEV IgG using enzyme-linked immunosorbent assays. The overall prevalence of anti-HEV was 6.8% (95%CI: 5.25–8.72), with 2.8% (12/428) found in the Yanomami areas, 3% (3/101) in an urban area, and 14.2% (40/282) in a rural area. Multivariate logistic analysis indicated that patients aged 31–45 years or ≥46 years are more likely to present anti-HEV positivity, with a respective aOR of 2.76 (95%CI: 1.09–7.5) and 4.27 (95%CI: 1.58–12.35). Furthermore, residence in a rural area (aOR: 7.67; 95%CI: 2.50–33.67) represents a relevant risk factor for HEV infection. Additional studies detecting HEV RNA in fecal samples from both humans and potential animal reservoirs are necessary to comprehensively identify risk factors associated with HEV exposure.

Abstract This paper analyzes the employment and income dynamics of rural families in Brazil's North Region, the main representative of the Brazilian Amazon. We use information from the National Household Sample Survey between 2004 and 2015 to create a typology of families based on the members' occupation in agricultural and non-agricultural activities. We hypothesize that the recent increase in employment and income was strongly associated with non-agricultural activities, reproducing the dynamics observed in other developing countries and Brazil's more developed regions. The results highlight that, differently from the rural exodus observed in the other regions of the country, the number of rural households increased in the North Region, attracted by the expanding non-agricultural occupations. As a result, the importance of earnings from non-agricultural activities and non-labor (pensions, cash transfers, among others) to family income has increased considerably, especially among self-employed family farmers. The final discussion highlights the relevance of non-agricultural activities for public policies to increase income in less developed rural areas.

People never ate much fish or depended so heavily on the sector for their welfare as they do today. The world consumption of fish per capita increased from 9.9 kg in 1960 to 19.2 kg in 2012. However, Brazil accounted for only 0.86% of world fish production in 2009. The North Region led the setting of fishing continental extraction (54.6%) driven by Amazonas and Pará states in 2009, but came in last place in the continental aquaculture production (10.61%) driven by Amazonas and Rondônia states. Thus, the objective of this study was to understand fish farming in the state of Rondônia in 2009 with data from a questionnaire applied to producers about area in hectares of fish farming, the number of fish stocked, and production in tons. The state of Rondônia produced 11,455.67 tons of fish in fish farming in 2009. Porto Velho was the site with one of the smaller areas and lower production of fish farming, but had the highest stocking density; while Mirante da Serra was the municipality with the largest area and highest production of fish farming, but had one of the lowest stocking densities. On the other hand, Colorado do Oeste was the site that had the highest density storage with smaller area, but its aquaculture production was intermediate compared with other municipalities. The fish farming industry is favored in Rondônia because of the high amount of fish intake in the North region and favorable conditions of production of aquatic organisms. However, it is crucial investments and incentives through public policies to increase the supply and consumption of this food in Brazil, as well as the maintenance of the intake pattern in the North and Northeast Regions. [ABSTRACT FROM AUTHOR]