Made available in DSpace on 2016-04-28T20:18:32Z (GMT). No. of bitstreams: 1 2009 - Alexandre Galvao.pdf: 298975 bytes, checksum: 9d22ecc92482b98f474bee4de0969bdd (MD5) Previous issue date: 2009-02-19 / Dermatobia hominis affects bovines, causing serious economic damages and of productivity for the beef cattle. The occurrence of dermatobiosis and alteration in the fertility of bulls come being currently studied with intention to evaluate its influence on the parameters of the spermatic quality. The objective of this study was to evaluate the clinical analysis of the masculine reproductive system, the testicular perimeter, the physical characteristics as motility, turbidity, intensity and spermatic concentration, and morphology of the semen. For in such a way, 18 bulls of the commercial Nelore race had been used, with age of 36 months, variation of corporal score of 6.0 to 6.5, after pre selection, following the standard of the Manual of the CBRA. The bulls had been placed in two groups: G1 (nine infested with D. hominis larvae on the scrotal skin) and G2 (nine bulls as controls), and they were submitted to the andrologic examinations in the days D24, D48, D63 and D74 and evaluated the testicular and seminal characteristics. The gotten average values of these parameters had been analyzed by the variance test, and results had indicated that it did not have significant difference (p< 0.005). These results indicate that the experimental infestation of D. hominis in the escrotal skin did not influence the spermatic quality of bulls of the Nelore race. / Dermatobia hominis afeta os bovinos, causando graves preju?zos econ?micos e de produtividade para a pecu?ria de corte. A ocorr?ncia da dermatobiose e altera??o na fertilidade de touros v?m sendo estudadas atualmente com intuito de avaliar a sua influ?ncia sobre os par?metros da qualidade esperm?tica. O objetivo deste estudo foi avaliar clinicamente o aparelho reprodutor masculino, o per?metro testicular, as caracter?sticas f?sicas (motilidade, turbilhonamento, vigor e concentra??o esperm?tica) e morfol?gicas do ejaculado. Foram utilizados 18 touros da ra?a Nelore comercial, com idade de 36 meses, com varia??o de escore corporal de 6,0 a 6,5, ap?s a pr?-sele??o seguindo o padr?o do Manual do CBRA. Os touros foram alocados em dois grupos: G1 (nove infestados com larvas de D. hominis na bolsa escrotal) e Grupo 2 ( nove touros, controle), e submetidos aos exames androl?gicos nos dias D24, D48, D63 e D74 e avaliadas as caracter?sticas testiculares e as seminais. Os valores m?dios obtidos destes par?metros foram analisados pelo teste de vari?ncia, e os resultados indicaram que n?o houve diferen?a significativa (P<0.05). Estes resultados indicam que a infesta??o experimental de D. hominis na bolsa escrotal n?o influenciou a qualidade esperm?tica de touros Nelore.