Serovar from Cattle in California from 1993-2019: Antimicrobial Resistance Trends of Clinical Relevance.

subsp. serovar () is a cattle-adapted pathogen that has emerged as one of the most commonly isolated and multidrug resistant (MDR) serovars in cattle. may be shed in feces, milk, and colostrum and persist in asymptomatic cattle, leading to spread and outbreaks in herds.