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Antibiotic susceptibility of Streptococcus pneumoniae colonizing the nasopharynx of Colombian children with pneumonia Susceptibilidad antimicrobiana de Streptococcus pneumoniae colonizante de nasofaringe en niños colombianos con neumonía

By Aura Lucía Leal and Elizabeth Castañeda

Abstract

Streptococcus pneumoniae is one of the principal causal agents of acute respiratory infection (ARI) in children, and its resistance to antibiotics has increased worldwide. This study examined the patterns of susceptibility to antibiotics of S. pneumoniae that had colonized the upper respiratory tract of 272 children hospitalized for pneumonia in two hospitals in Santafé de Bogotá. S. pneumoniae was isolated from 114 patients (42%). Diminished susceptibility to penicillin was noted in 19 isolates (17%), with 12 (11%) having an intermediate level of sensitivity and 7 (6%) showing outright resistance. Only 1 of the 19 isolates resistant to penicillin also showed resistance to ceftriaxone. There was diminished sensitivity to erythromycin in 3 isolates (3%), to chloramphenicol in 6 (5%), and to co-trimoxazole (trimethoprim + sulfamethoxazole) in 46 (40%). Resistance to multiple drugs was found in 7 isolates (6%). The most commonly encountered penicillin-resistant serotype was 23F (68.4%). An association was observed between age, prior use of antibiotics, and colonization by S. pneumoniae with reduced penicillin sensitivity or multiple-drug resistance. This study confirmed the presence of antibiotic-resistant S. pneumoniae in Colombia and highlights the importance of the rational use of antibiotics and of the implementation of epidemiologic surveillance for this agent.<br>Streptococcus pneumoniae es uno de los principales agentes causales de infección respiratoria aguda (IRA) en niños y su resistencia a antibióticos se ha incrementado en todo el mundo. En este estudio se determinaron los patrones de susceptibilidad a antimicrobianos de S. pneumoniae colonizante de las vías respiratorias altas en 272 niños hospitalizados por neumonía en dos hospitales de Santafé de Bogotá. Se aisló S. pneumoniae en 114 pacientes (42%). Se observó susceptibilidad disminuida a la penicilina en 19 aislamientos (17%), con sensibilidad intermedia en 12 (11%) y franca resistencia en 7 (6%). Solo 1 de los 19 aislamientos resistentes a penicilina mostró también resistencia a la ceftriaxona. Se observó sensibilidad disminuida a la eritromicina en 3 aislamientos (3%), al cloranfenicol en 6 (5%) y al cotrimoxazol (trimetoprima + sulfametoxazol) en 46 (40%). Se encontró multirresistencia en 7 aislamientos (6%). El serotipo con sensibilidad disminuida a la penicilina que se halló con mayor frecuencia fue el 23F (68.4%). Se observó una asociación entre la edad, el uso previo de antibióticos y la colonización con S. pneumoniae con susceptibilidad disminuida a la penicilina o multirresistencia. Este estudio confirma la presencia de resistencia antimicrobiana de S. pneumoniae en Colombia y resalta la importancia del uso racional de los antibióticos y de la implementación de la vigilancia epidemiológica sobre este agente

Topics: LCC:Public aspects of medicine, LCC:RA1-1270, LCC:Medicine, LCC:R, DOAJ:Public Health, DOAJ:Health Sciences
Publisher: Organización Panamericana de la Salud
Year: 1997
OAI identifier: oai:doaj.org/article:ed43631cf0be4e11818440f6f0a2d2ec
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