New antibiotic resistance gene in Washington dairy cattle

By Margaret Davis Background E coli bacteria are normally found in feces and environments of dairy cattle and calves, so monitoring E coli is a good way to learn about antibiotic resistance on dairies. A new gene, called blaCTX-M for resistance to ceftiofur was first detected in Washington State in 2011 (Table 1). Previously, the […]

Categories: Dairy