Multiple antibiotic resistance patterns of Escherichia coli isolates from swine farms.

Studies the effects of pig age and level of antibiotic use on single and multiple antibiotic resistance patterns of Escherichia coli. Incidence of single and multiple resistance to tested antibiotics in fecal E. coli of pigs of various ages; Cross-resistance of E. coli with the aminoglycoside group; Increased incidence of antibiotic resistance seen in nursery pigs.