Methods:The whole acrAB gene of Salmonella typhi 275 were amplified by PCR with the primers designed from Genebank,and the sequence of products and the amino acid sequence were detected.

• 方法 :以伤寒沙门菌基因序列为参考设计引物 ,以PCR法对伤寒沙门菌 2 75acrAB全序列进行调取并测序。