A field study of the bovine reproductive tract found that 71.7 percent of the culturable isolates from cervico-vaginal mucus were multidrug resistant. Surveillance for antimicrobial resistance in cattle leans on milk and feces, and the reproductive tract is almost never added to that list. Culture-based susceptibility testing and 16S rRNA sequencing were run side by side on 35 cows and heifers grouped by reproductive status. Why the reproductive tract stays out of routine resistance monitoring Almost all resistance data from a dairy herd come from two places. Clinical and subclinical mastitis supply the milk samples, and fecal or carcass work covers the gut. The cervico-vaginal tract gets sampled for fertility…