Figure 1.

Culture PCR results summarized for individual bulls beginning 2 wk after the second of 2 treatments with injectable oxytetracycline and 2 doses of monovalent Campylobacter fetus vaccine. Bulls were reported as positive if they had at least 1 positive test result on day 1, 7, 14, or 21 for each of the subsequent three 21-day observation periods. A bull was reported as negative for a period if he was test negative on all 4 samples considered part of that period.

* Results were negative for direct prepuce PCR for 2 of 4 samples and 2 samples were undetermined due to fungal overgrowth.