Overexpression of the Efflux Pumps SmeVWX and SmeDEF Is a Major Cause of Resistance to Co-trimoxazole in Stenotrophomonas maltophilia.

ABSTRACT: Co-trimoxazole is one of the antimicrobials of choice for treating Stenotrophomonas maltophilia infections. Most works on the molecular epidemiology of the resistance to this drug combination are based on the analysis of sul genes. Nevertheless, the existence of clinical co-trimoxazole-resistant S. maltophilia isolates that do not harbor sul genes has been reported. To investigate potential mutations that can reduce the susceptibility of S. maltophilia to co-trimoxazole, spontaneous S. maltophilia co-trimoxazole-resistant mutants isolated under different co-trimoxazole concentrations were studied. All mutants presented phenotypes compatible with the overexpression of either SmeVWX (94.6%) or SmeDEF (5.4%). Indeed, the analysis of a selected set of

SUBMITTER: Sanchez MB 

PROVIDER: S-EPMC5971588 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature