A three-year study on seasonal transmission and control of Fasciola hepatica of cattle in Louisiana

Malone, John B.; Loyacano, A.F.; Hugh‐Jones, Martin; Corkum, Kenneth C.

doi:10.1016/0167-5877(84)90003-5

Cited by 43 publications

(19 citation statements)

References 6 publications

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“…Soil moisture has been identified as a key factor in determining year-to-year variation in the transmission of F. hepatica (Malone et al, 1984). The most favourable soils are those with high water retention capacity such as alluvial soils (Rapsch et al, 2008) and the transmission of the disease is being associated with poorly drained soils (Malone et al, 1992; or loam soils ).…”

Section: Discussionmentioning

confidence: 99%

Application of a geographical information system approach for risk analysis of fascioliasis in southern Espírito Santo state, Brazil

et al. 2012

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Abstract.A model based on geographical information systems for mapping the risk of fascioliasis was developed for the southern part of Espírito Santo state, Brazil. The determinants investigated were precipitation, temperature, elevation, slope, soil type and land use. Weightings and grades were assigned to determinants and their categories according to their relevance with respect to fascioliasis. Theme maps depicting the spatial distribution of risk areas indicate that over 50% of southern Espírito Santo is either at high or at very high risk for fascioliasis. These areas were found to be characterized by comparatively high temperature but relatively low slope, low precipitation and low elevation corresponding to periodically flooded grasslands or soils that promote water retention.

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Section: Discussionmentioning

confidence: 99%

Application of a geographical information system approach for risk analysis of fascioliasis in southern Espírito Santo state, Brazil

et al. 2012

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“…Explosive growth because of high reproductive rates under favorable conditions alternate with drastic declines under unfavorable periods in for its development (Malone et al, 1984). Accordingly, small populations can quickly recover in number, since individuals are also able to self-fertilization (Dillon, 2004).…”

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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“…Accordingly, in the present study fewer snails were detected when the humidity was low (18.5-55%). Malone et al (1985), in Louisiana, reported a remarkable association between the number of L. (F.) bulimoides collected and humidity over 3 years of study within a closed range of soil temperature (15-25°C). From these data, it can be concluded that low humidity (not temperature) is a key factor affecting aestivation and, as a consequence, of the total number of snails as well as the number of infected snails.…”

Section: Discussionmentioning

confidence: 98%

Seasonal transmission of Fasciola hepatica in cattle and Lymnaea (Fossaria) humilis snails in central Mexico

Cruz-Mendoza¹,

Ibarra-Velarde²,

Quintero-Martínez³

et al. 2005

Parasitol Res

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A 19-month study on the prevalence of fasciolosis in 30 naturally infected cows, the presence of infected and non-infected Lymnaea (Fossaria) humilis snails, and variation in soil temperature and humidity is reported. The prevalence of fasciolosis in cattle declined from around 50% in March to 30% in July, then, it increased from August, reaching a plateau of 100% in November-January, before gradually declining thereafter. A rise in soil humidity and temperature in June and July, respectively, which peaked between August and November was observed. In July, L. (F.) humilis snails appeared, but the infection could only be found in these in August and November. The number of infected snails did not reflect the infestation rate in cows, even though the infestation kinetics in both hosts behaved as predicted from the life cycle of the parasite.

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A three-year study on seasonal transmission and control of Fasciola hepatica of cattle in Louisiana

Cited by 43 publications

References 6 publications

Application of a geographical information system approach for risk analysis of fascioliasis in southern Espírito Santo state, Brazil

Application of a geographical information system approach for risk analysis of fascioliasis in southern Espírito Santo state, 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

Seasonal transmission of Fasciola hepatica in cattle and Lymnaea (Fossaria) humilis snails in central Mexico

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