Antimicrobial Resistance and Spread of Class 1 Integrons among Salmonella Serotypes

Publisher Website
Google Scholar
Abstract
The resistance profiles, for 15 antimicrobial agents, of 333 Salmonella strains representing the most frequent nontyphoidal serotypes, isolated between 1989 and 1998 in a Spanish region, and 9 reference strains were analyzed. All strains were susceptible to amikacin, ceftazidime, ciprofloxacin, and imipenem, and 31% were susceptible to all antimicrobials tested. The most frequent types of resistance were to sulfadiazine, tetracycline, streptomycin, spectinomycin, ampicillin, and chloramphenicol (ranging from 46 to 22%); 13% were resistant to these six drugs. This multidrug resistance pattern was found alone or together with other resistance types within serotypes Typhimurium (45%), Panama (23%), and Virchow (4%). Each isolate was also screened for the presence of class 1 integrons and selected resistance genes therein; seven variable regions which carried one ( aadA1a , aadA2 , or pse-1 ) or two ( dfrA14-aadA1a , dfrA1-aadA1a , oxa1-aadA1a , or sat1-aadA1a ) resistance genes were found in integrons.

This publication has 23 references indexed in Scilit: