Experiments on anthelmintic control of Fasciola hepatica in Brazil.

摘要: Abstract Two separate field trials involving naturally infected cattle were carried out on two farms known to have a history of Fasciola hepatica infection. On the first farm, 15 animals per group allocated as follows: G1, triclabendazole (TCBZ) four times year; G2, TCBZ twice year (May and September); G3, untreated control. All groups grazed together after 3.5 years slaughtered their livers examined by federal meat inspectors who condemned 100% in G3 8.3% G2 owing presence lesions fasciolosis. In G1 no condemned. Significant differences weight gains not detected fluke counts remained at low levels treated groups. Also, control group, egg started decrease when 2 old. second 20 three (May, September December); G2; nitroxynil G4, rafoxanide G5, controls. weighed faecal samples approximately 28-day intervals. During period study, larger than others. treatment kept F. lower level for longer periods other drugs significant only obtained between receiving group.