Evaluation of effects of moxidectin on the reproductive characteristics of the bulls / Avaliação dos efeitos da moxidectina sobre as características reprodutivas de touros

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The helminths affect human beings and animals, causing serious damage to public health and considerable economic losses. The availability of anthelminthic of a broad-spectrum has helped reducing a large number of losses due to parasitic infestation. The objectives of this work were to evaluate the effect of the treatment with moxidectin, in Long Action (LA) formulation, in therapeutic doses in bulls, on the testicular consistency and perimeter, physical characteristics (motility and strength) and morphological of the semen and sexual behaviour. Twelve bulls, age 48 ± 10 months used. These animals were put in six, 06 blocks with two treatments. The animals were divided in groups: Control group (n=6) each animal received 5 ml of physiological solution subcutaneously in the left ear, and Treated group (n=6) each animal received 5 ml of moxidectin at 10% subcutaneously in the right ear. The animals were submitted to andrological examinations weekly, within a period of 60 days after the treatment. The testicular characteristics (consistency and perimeter) and seminal characteristic (motility, strength and morphology) were evaluated. Libido tests were done every fortnight, in five tests all together. The results indicated that there were not significant differences. (P>0.05) for the testicular consistency, perimeter, progressive motility, spermatic strength, morphology and libido among bulls of the control and treated groups. These results indicated that the treatment with moxidectin at 10% does not influence negatively on the reproductive characteristics of the bulls.

ASSUNTO(S)

bovinos anti-helmíntico bovines spermatozoa anthelmintic espermatozóides

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