The efflux pump SmeDEF contributes to trimethoprim-sulfamethoxazole resistance in Stenotrophomonas maltophilia.
نویسندگان
چکیده
Trimethoprim-sulfamethoxazole (co-trimoxazole) is one of the antimicrobials of choice for the treatment of Stenotrophomonas maltophilia infections. The analysis of mutants either lacking or overexpressing the efflux pump SmeDEF shows that this efflux pump contributes to intrinsic and acquired co-trimoxazole resistance in S. maltophilia. Since SmeDEF can extrude a variety of antibiotics, selection with such antimicrobials, including quinolones, might also select for S. maltophilia co-trimoxazole resistance.
منابع مشابه
The efflux pump SmeDEF contributes to trimethoprim / sulfamethoxazole 1 resistance in
The efflux pump SmeDEF contributes to trimethoprim/sulfamethoxazole 1 resistance in Stenotrophomonas maltophilia 2 3 María Blanca Sánchez and José Luis Martínez* 4 Departamento de Biotecnología Microbiana, Centro Nacional de Biotecnología, CSIC, 5 Darwin 3, Cantoblanco, 28049 Madrid, Spain. 6 7 Corresponding author’s mailing address: 8 JLM e-mail: [email protected] 9 10 11 12 13 14 15 16 17 1...
متن کاملContribution of integrons, and SmeABC and SmeDEF efflux pumps to multidrug resistance in clinical isolates of Stenotrophomonas maltophilia.
OBJECTIVES The contribution of integrons and efflux pumps to multidrug resistance in Stenotrophomonas maltophilia was evaluated. MATERIALS AND METHODS Ninety-three S. maltophilia clinical isolates were studied. PCR and direct sequencing were used to detect the presence of integrons. Real-time PCR was performed to assess and quantify the expression of the Sme efflux pumps of S. maltophilia. ...
متن کاملA function of SmeDEF, the major quinolone resistance determinant of Stenotrophomonas maltophilia, is the colonization of plant roots.
Quinolones are synthetic antibiotics, and the main cause of resistance to these antimicrobials is mutation of the genes encoding their targets. However, in contrast to the case for other organisms, such mutations have not been found in quinolone-resistant Stenotrophomonas maltophilia isolates, in which overproduction of the SmeDEF efflux pump is a major cause of quinolone resistance. SmeDEF is ...
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The resistance-nodulation-division (RND)-type efflux pump is one of the causes of the multidrug resistance of Stenotrophomonas maltophilia. The roles of the RND-type efflux pump in physiological functions and virulence, in addition to antibiotic extrusion, have attracted much attention. In this study, the contributions of the constitutively expressed SmeYZ efflux pump to drug resistance, virule...
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OBJECTIVES The use of antibiotics for the treatment of infectious diseases has led to important changes in the structure of pathogenic bacterial populations. However, these changes could be buffered if the expression of antibiotic resistance genes were to lead to the counter-selection of antibiotic-resistant strains in antibiotic-free environments. To test the effect of antibiotic resistance on...
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عنوان ژورنال:
- Antimicrobial agents and chemotherapy
دوره 59 7 شماره
صفحات -
تاریخ انتشار 2015