Bioclimatic distribution and prevalence maps for Fasciola hepatica in Espírito Santo State, Brazil

Freitas, Deivid França; Martins, Isabella Vilhena Freire; Santos, Gleissy Mary A. D. A. dos; Santos, Alexandre Rosa dos; Gomes, Daniel da Silva

doi:10.1186/1678-9199-20-32

Cited by 13 publications

(17 citation statements)

References 14 publications

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“…In this context, the state of Espírito Santo becomes a potential breeding site, due to the warm and humid climate and local topography to the development of the parasite and its host (Bernardo et al, 2011). Martins et al (2012) observed the existence of risk areas for fasciolosis in the southern region of this state and Freitas et al (2014) reported prevalence rates of up to 28.41% for the disease. These data reflect the importance of the state of Espírito Santo as being a reservoir area for the disease and investigations on factors that determine mollusc species richness and distribution in wetland systems are scarce in the Neotropical region (Maltchik et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

The population density of Lymnaea columella (Say, 1817) (Mollusca, Lymnaeidae) an intermediate host of Fasciola hepatica (Linnaeus, 1758), in the Caparaó microregion, ES, Brazil

et al. 2016

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The aim of this study was to monitor the population density of Lymnaea columella, an intermediate host of Fasciola hepatica, in various aquatic habitats and in drinking water in the area of the Instituto Federal de Educação, Ciência e Tecnologia do Espírito Santo, on Caparaó Microregion, municipality of Alegre, state of Espírito Santo, Brazil. Monthly samplings were performed at certain points between drainage areas and drinking water in cattle and goat production systems during the years 2010 to 2013. The mean temperature, precipitation and the frequency of samples of L. columella were analysed graphically according the monthly average during the study period. A total of 2,038 molluscs were collected, 1558 of which were L. columella, that predominated in all sampled points. The highest average of specimens observed for L. columella was in the years 2010 and 2013 (51.0), and occurred decreased in 2011 (19.8). The temperature and precipitation averaged is 23.7 °C and 141 mm/year, respectively. Rainfall peak occurred in March (2011, 2013) and November (2012, during these periods the population of L. columella growth. There was no significant difference in the relationship between the specimens observed with seasons (dry-wet), thus the population of L. columella remained stable and can be found throughout the year.

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Section: Introductionmentioning

confidence: 99%

The population density of Lymnaea columella (Say, 1817) (Mollusca, Lymnaeidae) an intermediate host of Fasciola hepatica (Linnaeus, 1758), in the Caparaó microregion, ES, Brazil

et al. 2016

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“…In a study by Bernardo et al (2011) with data from a slaughterhouse in the Atilio Vivácqua city, 27.625 livers were condemned due to fasciolosis, representing a prevalence of 24.89% between the years 2006 to 2009. Freitas et al (2014) also found high percentages of prevalence, being recorded mainly in the southern region of the state, with percentages ranging from 0.01 to 28.41%. Alves et al (2011) observed in 717 stool specimens collected on properties in the region a cumulative frequency of 21.33% positive for disease cases.…”

Section: The Southern Espírito Santo Is An Area Notoriously Known Formentioning

confidence: 78%

“…In another study, Freitas et al (2014) observed through a zoning distribution for risk areas for fasciolosis that 52.24% of the entire state is in areas at risk for occurrence and survival of F. hepatica.…”

Section: Resultsmentioning

confidence: 99%

Climate change on the forecasted risk of bovine fasciolosis in Espírito Santo state, Brazil

et al. 2014

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The climate change expected for the coming years can cause large economic losses and a strong impact on intestinal parasites of ruminants throughout the world. In this sense, organisms belonging to the class trematoda seem to be highly sensitive to any changes in the patterns of temperature and rainfall caused by possible climate change. So, maps were elaborated forecasting current and future risk to Fasciola hepatica in the state of Espírito Santo, Southeast of Brazil, using as a base increases in the temperature ranging from 1°C to 5°C. Environmental and climatic factors like temperature, rainfall, altitude and declivity were used for generation of maps bioclimatic risk of fasciolosis through of the ArcGIS/ArcInfo 10.1 Software. High-risk areas resulted in a total of 35.42% for the current risk and tended to decrease with increases in temperature over the next 100 years, which favored a reduction of 35.42% to 33.84% in these regions. The places included in the of low risk areas showed significant increases in their areas for temperatures up to 5°C with values ranging from 24.65% to 28.26% of their areas. These forecasting models using increases in temperatures in the generation of risk maps to F. hepatica were first made in Brazil and like the others, represented a tendency to aid in policy making animal and human health oriented regions shown to be potentially suitable for the risk of bovine fasciolosis. Key words: Geographic Information System (GIS), climate change, Fasciola hepatica, cattle ResumoAs mudanças climáticas esperadas para os próximos anos podem ocasionar grande impacto sobre as parasitoses intestinais de ruminantes em todo o mundo. Neste sentido, organismos pertencentes à classe Trematoda parecem ser altamente sensíveis a alterações nos padrões de temperatura e precipitação causados por eventuais alterações climáticas. Assim, foram elaborados mapas de previsão de risco atual e futuro para Fasciola hepatica no estado do Espírito Santo, Sudeste do Brasil, utilizando como base o aumentos na temperatura que variaram de 1°C a 5°C. Fatores ambientais e climáticos, como a temperatura, precipitação, a altitude e a declividade foram utilizados para a geração de mapas de risco para fasciolose por meio do programa ArcGIS / ArcInfo 10.1. As áreas de alto risco resultaram em um total de 35,42% para o risco atual e tenderam a diminuir com o aumento da temperatura para os próximos 100 anos, o que favoreceu uma redução de 35,42% para 33,84% nestas regiões. As localidades

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“…Both Oliveira (2008) and Martins et al (2014) also made correlations between presence of mollusks on the farm, sharing of grazing areas between cattle and other hosts, and the fact that animals drank water from a still source, such as ditches or reservoirs, as risk factors for occurrence of fascioliasis in the locations that they evaluated. On the other hand, Freitas et al (2014) concluded that favorable climatic conditions alone (altitude, temperature, declivity and rainfall) were not sufficient for occurrence of fascioliasis in the state of Espírito Santo, southeastern region of Brazil. Oliveira et al (2007) investigated about break of fascioliasis in the municipality of Canutama, state of Amazonas, northern region of Brazil, regarding the characteristics of occurrences of positive cases of F. hepatica and the related exposure factors.…”

Section: Discussionmentioning

confidence: 97%

Prevalence of bovine fascioliasis, areas at risk and ensuing losses in the state of Goiás, Brazil

Aquino

Soares

Rossi

et al. 2018

Rev. Bras. Parasitol. Vet.

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The present study had to determine the prevalence and spatial distribution of areas at risk of bovine fascioliasis in the state of Goiás, central-western Brazil between 2007 and 2014; to evaluate the associations of some epidemiological variables with occurrences of Fasciola hepatica in animals; and to estimate the economic losses that this parasite on the cattle industry. It could be concluded that of 23,255,979 animals slaughtered, the average prevalence of F. hepatica in cattle in Goiás during the period evaluated was 0.0026% (95% CI: 0.0024-0.0028). In the State of Goias, in about then years (since when this parasite was found for the first time by other researchers in 2007), F. hepatica was diagnosed in 168 new municipalities. Using the regression analysis, the effective bovine herd size was a significant risk factor (OR= 1.21; 95% CI 1.1022-1.4510; p ≤ 0.05) for cattle to be infected with fascioliasis in the state of Goiás. The cattle-rearing industry lost approximately R$ 15,072.75 (US$ 4,785) due to condemn of livers with Fasciola in the state of Goiás. New studies need to be conducted in these regions, with the aim to identify the likelihood of presence of intermediate hosts, which might serve as a source of F. hepatica infection for definitive hosts.

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Bioclimatic distribution and prevalence maps for Fasciola hepatica in Espírito Santo State, Brazil

Cited by 13 publications

References 14 publications

The population density of Lymnaea columella (Say, 1817) (Mollusca, Lymnaeidae) an intermediate host of Fasciola hepatica (Linnaeus, 1758), in the Caparaó microregion, ES, Brazil

The population density of Lymnaea columella (Say, 1817) (Mollusca, Lymnaeidae) an intermediate host of Fasciola hepatica (Linnaeus, 1758), in the Caparaó microregion, ES, Brazil

Climate change on the forecasted risk of bovine fasciolosis in Espírito Santo state, Brazil

Prevalence of bovine fascioliasis, areas at risk and ensuing losses in the state of Goiás, Brazil

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