Figure 1. Resistance patterns of 75 K88-positive isolates from 20 K88-positive farms. Results were expressed as percentage. The black bar represents the percentage of antimicrobial resistance to an specific antibiotic. The antimicrobials tested were: Spe (spectinomycin), Tet (tetracycline), Amp (ampicillin), Car (carbenicillin), Neo (neomycin), Sul (sulfamethoxazole), Cefa (cefadroxil), Gen (gentamicin), Tob (tobramycin), Apr (apramycin), Ceft (ceftiofur), Ami (amikacin), Enr (enrofloxacin), Cip (ciprofloxacin), Pol (polymyxin B).