Which one of the following sets of conditions predispose a cow to metritis?
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Cows are predisposed to post-parturient metritis by many things, including: – Dystocia – Ketosis (overfeeding in dry period) – Hypocalcemia (Ca-P imbalance in feed)
Cows are also predisposed to metritis by: – Retained placenta – Contaminated calving environment – Abortion – Malnutrition
Ketosis and hypocalcemia (subclinical or clinical) are two common predisposing conditions to metritis in dairy cattle. Ketosis can be caused by overfeeding in the dry period, leading to an increase in fat mobilization and NEFA formation during the transition period. A Ca-P imbalance in the peri-parturient diet is one cause calcium dysregulation in the post-parturient cow that leads to hypocalcemia.
In cattle, the causative bacterial organisms isolated most often are Trueperella pyogenes alone or with Fusobacterium necrophorum or other gram-negative anaerobes. Note the name changes – Trueperella pyogenes used to be called Arcanobacterium pyogenes and before that it was classified as Corynebacterium pyogenes.
