Abstract：To understand the relationship between the multidrug resistance of Salmonella isolates from pig carcass and the condition of carrying the integron-I and the multidrug resistance genes,the susceptibility testing of 78 strains of Salmonella isolates from pig carcass to 22 varieties of antibiotics were performed by means of K-B disc method.In addition PCR technique was used to detect the presence of the integron I and the multi-resistance genes.It was found that 41 strains of these 78 isolates tested(52.56%)exhibited resistance to at least two antibiotics,belonging to the multidrug-resistant strains with the highest frequency of resistance to multiple antibiotics of the doxycycline-tetracycline-chloromycetin-kanamycin spectrum.In 41 strains of multidrug resistance,19 strains carried the integron-I and the most prevalent genes to be detected by PCR were tetB,aph(3)-IIa and flor genes.This result indicates that a good correlation exists between multidrug resistance and the carrier condition of integon-I,and the results to detect the phenotype of multidrug resistance and the detection of multidrug resistant genes were consistent.
