Environmental impact of ivermectin excreted by cattle treated in autumn on dung fauna and degradation of feces on pasture

IGLESIAS, LUCÍA; SAUMELL, CARLOS; FERNÁNDEZ, ALICIA SILVINA; FUSÉ, LUIS; LIFSCHITZ, ADRIÁN; RODRÍGUEZ, EDGARDO; STEFFAN, PEDRO; FIEL, CÉSAR

PARASITOLOGY RESEARCH

SPRINGER

Año: 2006 vol. 100 p. 93 - 102

0932-0113

The effect of ivermectin excreted in faeces of treated cattle on dung fauna and dung degradation on pasture during autumn was evaluated. Two groups of calves were used. One group was treated subcutaneously with ivermectin while the other remained as untreated control. Faeces deposited on 1, 3, 7, 14 and 21 days post-treatment (dpt) were removed on 1, 3, 7, 14, 21, 30 and 60 days postdeposition (dpd) and were used to determine the concentration of ivermectin and the percentage of organic matter and for the collection of colonising organisms. Samples from 1 and 3 dpt contained the highest drug concentration and percentage of organic matter compared to the control group (p