Detection of bovine viral diarrhea virus in semen obtained after inoculation of seronegative postpubertal bulls.

Objective: To evaluate persistence of bovine viral diarrhea virus (BVDV) in semen after inoculation of postpubertal bulls.

Animals: Three 2-year-old bulls and five 6-month-old calves.

Procedure: 3 seronegative 2-year-old bulls were inoculated intranasally with BVDV.

Effects of testicular biopsy in clinically normal bulls.

Objective: To determine whether testicular needle biopsy is detrimental to testicular function in clinically normal bulls.

Design: Prospective study.

Animals: 6 mixed-breed mature bulls.