Linezolid activity against clinical Gram-positive cocci with advanced antimicrobial drug resistance in Iran.
J Glob Antimicrob Resist
; 10: 200-203, 2017 09.
Article
en En
| MEDLINE
| ID: mdl-28735054
OBJECTIVES: The aim of the study was to investigate the linezolid activity against clinical Gram-positive cocci with advanced antimicrobial drug resistance. METHODS: A collection of methicillin resistant Staphylococcus aureus (MRSA), vancomycin resistant enterococci (VRE), penicillin non-susceptible Streptococcus pneumoniae (PNSP), and group B streptococci (GBS) were isolated from various clinical samples. Antimicrobial susceptibility tests were done using standard methods Subsequently, we investigated linezolid antibacterial activities, the first approved oxazolidinone against isolates by the standard broth microdilution method. RESULTS: According to our results, MRSA and PNSP isolates were multidrug resistant, and almost half of the VRE isolates were high level gentamicin resistant (HLGR). Furthermore, resistance to linezolid was not seen among the isolates. The MIC90 values for MRSA, VRE, PNSP and GBS isolates were 4µg/ml, 2µg/ml, 1µg/ml, and 0.5µg/ml, respectively. Only 6.25% of vancomycin resistant enterococci showed intermediate susceptibility to this antibiotic. CONCLUSIONS: These findings indicate that linezolid has an excellent activity against clinical drug resistant Gram-positive isolates in Iran. Constant monitoring and surveillance of linezolid MIC distribution allows the researchers to assess and detect gradual upward MIC drifts.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Cocos Grampositivos
/
Staphylococcus aureus Resistente a Meticilina
/
Linezolid
/
Antibacterianos
Límite:
Humans
País/Región como asunto:
Asia
Idioma:
En
Revista:
J Glob Antimicrob Resist
Año:
2017
Tipo del documento:
Article
País de afiliación:
Irán