Clinical and microbiological characteristics of patients colonized or infected by Stenotrophomonas maltophilia: is resistance to sulfamethoxazole/trimethoprim a problem?
Stenotrophomonas maltophilia has emerged as an important opportunistic pathogen in the last decade. Increased resistance to sulfamethoxazole/trimethoprim (SMX/TMP) has been reported in S. maltophilia strains in the past few years, leading to few therapeutic options. We conducted a prospective multic...
| Autores: | , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | Brasil |
| Institución: | Instituto de Medicina Tropical (IMT) |
| Repositorio: | Revista do Instituto de Medicina Tropical de São Paulo |
| Idioma: | inglés |
| OAI Identifier: | oai:revistas.usp.br:article/183591 |
| Acceso en línea: | https://www.revistas.usp.br/rimtsp/article/view/183591 |
| Access Level: | acceso abierto |
| Palabra clave: | Stenotrophomonas maltophilia Immunocompromised patients Sulfamethoxazole/trimethoprim resistance Gram-negative infection |
| Sumario: | Stenotrophomonas maltophilia has emerged as an important opportunistic pathogen in the last decade. Increased resistance to sulfamethoxazole/trimethoprim (SMX/TMP) has been reported in S. maltophilia strains in the past few years, leading to few therapeutic options. We conducted a prospective multicenter study at two Brazilian teaching hospitals that identified S. maltophilia isolates and evaluated their antimicrobial susceptibility profile, SMX/TMP resistance genes and their clonality profile. A total of 106 non-repeated clinical samples of S. maltophilia were evaluated. Resistance to SMX/TMP was identified in 21.6% of the samples, and previous use of SMX/TMP occurred in 19 (82.6%). PCR detected the sul1 gene in 14 of 106 strains (13.2%). Of these isolates, nine displayed resistance to SMX/TMP. The resistant strains presented a polyclonal profile. This opportunistic pathogen has emerged in immunocompromised hosts, with few therapeutic options, which is aggravated by the description of emerging resistance mechanisms, although with a polyclonal distribution profile. |
|---|