The Prevalence and Characterization of Fecal Extended-Spectrum-Beta-Lactamase-Producing Escherichia coli Isolated from Pigs on Farms of Different Sizes in Latvia

拉脱维亚不同规模养猪场猪粪便中产超广谱β-内酰胺酶大肠杆菌的流行情况及特征