Dynamics of Fasciola hepatica transmission in the Andean Patagonian valleys, Argentina
We described the transmission dynamics of Fasciola hepatica at its southern distribution range. Studies of prevalence and egg output in cattle and population dynamics and infection in snails were performed in a farm in the Andean Patagonian valleys, Argentina, between December 1998 and February 2002...
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todo:paper_03044017_v145_n3-4_p274_Kleiman2023-10-03T15:20:32Z Dynamics of Fasciola hepatica transmission in the Andean Patagonian valleys, Argentina Kleiman, F. Pietrokovsky, S. Prepelitchi, L. Carbajo, A.E. Wisnivesky-Colli, C. Andean Patagonian valleys Argentina Cattle Epidemiology Fasciola hepatica Lymnaea viatrix anthelmintic agent rain Argentina article autumn cattle climate cohort analysis dynamics Fasciola hepatica fascioliasis geographic distribution heifer lifespan Lymnaea Lymnaea viatrix metacercaria nonhuman overwintering parasite identification parasite transmission population dynamics prevalence seasonal variation spring summer temperature dependence Animal Husbandry Animals Anthelmintics Argentina Cattle Cattle Diseases Fasciola hepatica Fascioliasis Female Population Dynamics Seasons Snails Time Factors Animalia Bos Fasciola hepatica Gastropoda Lymnaea viatrix We described the transmission dynamics of Fasciola hepatica at its southern distribution range. Studies of prevalence and egg output in cattle and population dynamics and infection in snails were performed in a farm in the Andean Patagonian valleys, Argentina, between December 1998 and February 2002. Snail surveys were conducted from spring to autumn. Infection was diagnosed coprologically in the whole herd at the beginning and end of the study, and in a cohort of heifers at the beginning and end of 2001. A twice-a-year anthelmintic treatment was implemented in 1999. The relationship of the variables mentioned above with temperature and rainfall was determined. Lymnaea viatrix showed a life-span of about 15 months and an annual pattern of population dynamics. Specimens were frequently found in temporary environments and lagoons, and rarely in streams. Snail abundance and soil-water availability were directly related in temporary environments and inversely related in lagoons. Overall prevalence in L. viatrix was 0.67% (range: 0.9-14%) and infection was detected in summer and autumn. At the beginning of the study, calves were the least infected age group (15%). Prevalences and median egg counts in grazing animals were similar at the beginning (heifers: 81%, 3.3 epg; cows: 60%, 1.3 epg) and end of the study (heifers and cows: around 51%, 1 epg). Likewise, the prevalence in the cohort of heifers remained similar (around 40%) between surveys. Transmission to cattle was highly effective despite of the short activity period and the low infection rate of snails, and the regular anthelminthic treatment. There would be two seasonal transmission peaks, one in summer-autumn, when infected snails were present, and the other in early spring due to overwintering metacercariae. Some recommendations based on the climatic conditions of the region are provided to minimize snail infection and ultimately to reduce the incidence of fasciolosis in cattle. © 2007 Elsevier B.V. All rights reserved. Fil:Kleiman, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pietrokovsky, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Prepelitchi, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Carbajo, A.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Wisnivesky-Colli, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03044017_v145_n3-4_p274_Kleiman |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Andean Patagonian valleys Argentina Cattle Epidemiology Fasciola hepatica Lymnaea viatrix anthelmintic agent rain Argentina article autumn cattle climate cohort analysis dynamics Fasciola hepatica fascioliasis geographic distribution heifer lifespan Lymnaea Lymnaea viatrix metacercaria nonhuman overwintering parasite identification parasite transmission population dynamics prevalence seasonal variation spring summer temperature dependence Animal Husbandry Animals Anthelmintics Argentina Cattle Cattle Diseases Fasciola hepatica Fascioliasis Female Population Dynamics Seasons Snails Time Factors Animalia Bos Fasciola hepatica Gastropoda Lymnaea viatrix |
| spellingShingle |
Andean Patagonian valleys Argentina Cattle Epidemiology Fasciola hepatica Lymnaea viatrix anthelmintic agent rain Argentina article autumn cattle climate cohort analysis dynamics Fasciola hepatica fascioliasis geographic distribution heifer lifespan Lymnaea Lymnaea viatrix metacercaria nonhuman overwintering parasite identification parasite transmission population dynamics prevalence seasonal variation spring summer temperature dependence Animal Husbandry Animals Anthelmintics Argentina Cattle Cattle Diseases Fasciola hepatica Fascioliasis Female Population Dynamics Seasons Snails Time Factors Animalia Bos Fasciola hepatica Gastropoda Lymnaea viatrix Kleiman, F. Pietrokovsky, S. Prepelitchi, L. Carbajo, A.E. Wisnivesky-Colli, C. Dynamics of Fasciola hepatica transmission in the Andean Patagonian valleys, Argentina |
| topic_facet |
Andean Patagonian valleys Argentina Cattle Epidemiology Fasciola hepatica Lymnaea viatrix anthelmintic agent rain Argentina article autumn cattle climate cohort analysis dynamics Fasciola hepatica fascioliasis geographic distribution heifer lifespan Lymnaea Lymnaea viatrix metacercaria nonhuman overwintering parasite identification parasite transmission population dynamics prevalence seasonal variation spring summer temperature dependence Animal Husbandry Animals Anthelmintics Argentina Cattle Cattle Diseases Fasciola hepatica Fascioliasis Female Population Dynamics Seasons Snails Time Factors Animalia Bos Fasciola hepatica Gastropoda Lymnaea viatrix |
| description |
We described the transmission dynamics of Fasciola hepatica at its southern distribution range. Studies of prevalence and egg output in cattle and population dynamics and infection in snails were performed in a farm in the Andean Patagonian valleys, Argentina, between December 1998 and February 2002. Snail surveys were conducted from spring to autumn. Infection was diagnosed coprologically in the whole herd at the beginning and end of the study, and in a cohort of heifers at the beginning and end of 2001. A twice-a-year anthelmintic treatment was implemented in 1999. The relationship of the variables mentioned above with temperature and rainfall was determined. Lymnaea viatrix showed a life-span of about 15 months and an annual pattern of population dynamics. Specimens were frequently found in temporary environments and lagoons, and rarely in streams. Snail abundance and soil-water availability were directly related in temporary environments and inversely related in lagoons. Overall prevalence in L. viatrix was 0.67% (range: 0.9-14%) and infection was detected in summer and autumn. At the beginning of the study, calves were the least infected age group (15%). Prevalences and median egg counts in grazing animals were similar at the beginning (heifers: 81%, 3.3 epg; cows: 60%, 1.3 epg) and end of the study (heifers and cows: around 51%, 1 epg). Likewise, the prevalence in the cohort of heifers remained similar (around 40%) between surveys. Transmission to cattle was highly effective despite of the short activity period and the low infection rate of snails, and the regular anthelminthic treatment. There would be two seasonal transmission peaks, one in summer-autumn, when infected snails were present, and the other in early spring due to overwintering metacercariae. Some recommendations based on the climatic conditions of the region are provided to minimize snail infection and ultimately to reduce the incidence of fasciolosis in cattle. © 2007 Elsevier B.V. All rights reserved. |
| format |
JOUR |
| author |
Kleiman, F. Pietrokovsky, S. Prepelitchi, L. Carbajo, A.E. Wisnivesky-Colli, C. |
| author_facet |
Kleiman, F. Pietrokovsky, S. Prepelitchi, L. Carbajo, A.E. Wisnivesky-Colli, C. |
| author_sort |
Kleiman, F. |
| title |
Dynamics of Fasciola hepatica transmission in the Andean Patagonian valleys, Argentina |
| title_short |
Dynamics of Fasciola hepatica transmission in the Andean Patagonian valleys, Argentina |
| title_full |
Dynamics of Fasciola hepatica transmission in the Andean Patagonian valleys, Argentina |
| title_fullStr |
Dynamics of Fasciola hepatica transmission in the Andean Patagonian valleys, Argentina |
| title_full_unstemmed |
Dynamics of Fasciola hepatica transmission in the Andean Patagonian valleys, Argentina |
| title_sort |
dynamics of fasciola hepatica transmission in the andean patagonian valleys, argentina |
| url |
http://hdl.handle.net/20.500.12110/paper_03044017_v145_n3-4_p274_Kleiman |
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| _version_ |
1782024445732323328 |