Abstract

This study describes a model for experimental induction of metritis in cattle. Cows were given two intrauterine inoculations of a mixture of Corynebacterium pyogenes and Bacteroides melaninogenicus at 12 and 36 h following calving. The endometrium was subjected to minor irritation just prior to inoculation with bacteria. All cows showed signs of severe metritis within 48 h following the last intrauterine inoculation. The study also evaluated intrauterine oxygen-reduction potential (E h) and pH following calving in control cows, cows with retained fetal membranes, and cows with induced metritis. The results revealed that cows with retained fetal membranes or induced metritis had lower E h values (P < 0.05) than control cows on Days 2, 3, or 4 postpartum. This suggests that antibiotics that are effective under anaerobic conditions should be considered for intrauterine therapy during this period.

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