This is bull
A cattle producer from northeast Oklahoma found several of his cows open during the last pregnancy check. The previous year he purchased a new bull with a breeding soundness exam performed before purchasing. Due to the high number of open cows, he submitted a preputial wash and requested a new fertility test. The following is a video of the culture after 48 hours of initiation.
Video: Culture pouch after 48 hours of initiation.
Tritrichomonas foetus trophozoites. This parasite is sexually transmitted, causing early abortions, endometritis, and occasionally pyometra. Bulls are asymptomatic and remain infected indefinitely. Diagnosis is confirmed by culture or qPCR and control measures should be focused on biosecurity protocols, culling, and artificial insemination.
Image: Stained T. foetus (arrow).
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