Integron-Associated Antibiotic Resistance in Salmonella enterica Serovar Typhi from Asia

Abstract

Eighteen of 25 isolates of Salmonella enterica serovar Typhi were multidrug resistant and contained class 1 integrons with a single cassette, dfrVII or aadA1 . The dfrVII -containing integron was likely borne on an IncHI1 plasmid. Salmonella serovar Typhi could become resistant to broad-spectrum cephalosporins by integrating cassettes, such as veb-1 , a common cassette in Asia.