An Investigation in the Antibiotic Resistance of E.Coli Isolated from Famers' Pig and Chicken in Guiyang

To investigate the antibiotic resistance of E.coli isolated from pig and chicken in Guiyang City,a total of 105 feces samples were collected and 96 E.coli strains were isolated and indentified from all samples.The MIC values of the 96 strains to 10 antibiotics were measured with the method of solid agar dilution.Result demonstrated that the resistance to florfenicol,ceftiofur sodium,oxytetracycline,amoxycillin,streptomycin,sulfsdiazine soditim,enrofloxacin,ciprofloxacin,kanamyci,and gentamicin were 88.5%,83.4%,82.3%,79.2%,76.0%,75.0%,71.9%,63.6%,61.4%,53.2%,respectively.Most of the 96 strains were multiple-antibiotic-resistant,the resistant spectrum range from two to 10 antibiotics.Therefore,the resistance situation to antibiotics of E.coli in famers' pig and chicken is considerable severe in Guiyang City.