Resumen de Strategic treatments against " Fasciola hepatica " in bovines in Veracruz, Mexico

Héctor Quiroz Romero, Froylán Ibarra-Velarde, P. Ochoa-Galván, María Yolanda Manga González

• The aim of the study was to discover which months were more suitable for the administration of treatments on cattle for the study and their effects on egg reduction in an endemic zone in the Gulf of Mexico. Five strategic control programmes in Veracruz, Mexico, with one, two and three triclabendazole treatments per year were evaluated. Five groups of 23 cows naturally infected with Fasciola hepatica were formed. Group 1 was the control and was in January only treated; Group 2 in January and May; Group 3 in January and June; Group 4 in January and September and Group 5 in January, June and September. The feces were examined approximately every 43 days for 13 months to determine the quantity of eggs in 5 g (epg). The epg reduction percentage of the different groups in comparison with the control was: Group 2, 47.5%; Group 3, 30.5%; Group 4, 77.9% and Group 5, 67.8%. Group 4, treated in January and September, had the highest epg reduction percentage (P < 0.5)