Isolation of Mycoplasma spp. and serological responses in bulls prior to and following their introduction into Mycoplasma bovis-infected dairy herds.

摘要: ABSTRACT With the common use of bulls for breeding following a period artificial insemination in seasonally bred dairy herds, it is important to consider potential role bull transmission Mycoplasma spp. within and between herds. This study aimed assess prevalence population before after bovis -infected The frequency subclinical infection was also measured serologically postbreeding, association on semen quality evaluated. isolated from 4 118 herds infected with M. . In bulls, seroprevalence increased 9% prebreeding 46% postbreeding total seroconversion rate 44% across no evidence clinical disease. There bulls' abnormal palpation characteristics (enlarged or nodular) seminal vesicular glands poor attributes such as mass activity, sperm motility, morphology. These results demonstrate high degree exposure highlight be mycoplasma carriers Herd biosecurity protocols control programs should take into account introduction spread