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2006, Number 1

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Enf Infec Microbiol 2006; 26 (1)

Identificación de la susceptibilidad antimicrobiana de Streptococcus del Grupo B aislados de mujeres embarazadas mexicanas

Reyna FJ, Ortiz IFJ, Beltrán ZM, Villeda GG, Sosa GIE

Language: Spanish
References: 19
Page:
PDF size: 93.68 Kb.


ABSTRACT

Objective. Our aim was to study the antimicrobial susceptibilities of Group B Streptococcus (GBS) isolated from Mexican pregnant women. Material and methods. A descriptive transversal study was conducted with 107 strains of GBS. Vaginal swabs were taken between January 2002 and December 2003 from 91 pregnant women (one swab from vaginal) . Also 16 viable strains of GBS were obtained from the collection stokes of GBS collected of years 1991 to the 2001 by simple random form. The antimicrobial susceptibility was to identify by automatic test,using the concentrations equivalent to the categorical breakpoints of National Committee of Standards of clinical laboratories (NCCLS) and the serotypes were tested by agglutination in capillary tubes. Results. All strains of GBS were 100% susceptible to amoxicillin, cefalotin, cefazolin, imipenem, nitrofurantoin, rifampin, trimethoprim-sulfamethoxazol and vancomycin. Resistance to clarithromycin and clindamycin was found in 2.8% of the isolates respectively. 1.8% strains were intermediate to clindamycin and penicillin respectively, and 0.9% strains were intermediate to erythromycin and ampicillin respectively. The susceptibility to penicillin of GBS in our population was 98.1% . The resistance to clindamycin and claritromycin is lower than reports in other countries. We didn ’t find resistance to erythromycin.


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