Resistance to the antimicrobials ampicillin, chloramphenicol, streptomycin, sulfonamides and tetracycline
was frequently observed and varied between 23.5% and 83.1%. Resistance ranged from 15.6% to 20.7% for the
combination trimethoprim–sulfonamides and from 3.4% to 5.8% for nalidixic acid.