Shigella sonnei: ¨Est ocurriendo un cambio en nuestro medio? / Shigella sonnei: is a change occurring in our middle?

RESUMEN

Objetivos: Determinar los serogrupos de Shigella como agentes etiol¢gicos de diarrea. Dise¤o Estudio descriptivo, retrospectivo, anal¡tico. Instituci¢n Instituto de Medicina Tropical, Universidad Nacional Mayor de San Marcos, Lima, Per£, y Hospital Nacional Daniel A. Carri¢n, Callao, Per£. Material biol¢gico Aislamientos de Shigella sp. en coprocultivos. Intervenciones Se revis¢ los aislamientos de Shigella sp. en coprocultivos, durante los a¤os 2010 y 2011, en la base de datos WHONET 5.6 del hospital, tanto de pacientes adultos como pedi tricos, ambulatorios, hospitalizados y atendidos en emergencia. Se distribuy¢ la Shigella por serogrupos. Principales medidas de resultados: Frecuencia absoluta y frecuencia relativa de Shigella sp. Resultados: El a¤o 2010 se aisl¢ 64 Shigellas sp.; 41 correspondieron al serogrupo flexneri (64,1 por ciento) y 20 al serogrupo sonnei (31,3 por ciento). En el a¤o 2011 se aisl¢ 90 Shigellas sp.; 36 correspondieron a serogrupo flexneri (40 por ciento) y 50 al serogrupo sonnei (55,6 por ciento). Las diferencias encontradas son estad¡sticamente significativas. Conclusiones: Shigella sonnei fue el serogrupo predominante en nuestro hospital.

ABSTRACT

Objectives: To determine Shigella serogroups as diarrhea etiological agents. Design: Descriptive, retrospective, analytical study. Setting: Instituto de Medicina Tropical, Universidad Nacional Mayor de San Marcos, Lima, Peru, and Hospital Nacional Daniel A. Carrion, Callao, Peru. Biologic material: Shigella sp. isolates in coprocultures. Interventions: Shigella sp. isolates in coprocultures of outpatient, hospitalized and emergency adult and pediatric patients attended during years 2010 and 2011were reviewed at the hospital WHONET 5.6 database. Shigella were distributed by serogroups. Main outcome measures: Absolute and relative frequency of Shigella sp. Results: Sisty-four Shigellas sp were isolated in 2010; 41 corresponded to flexneri serogroup (64.1 per cent) and 20 to sonnei serogroup (31.3 per cent). Ninety Shigellas sp. were isolated in 2011; 36 corresponded to flexneri serogroup (40 per cent) and 50 to sonnei serogroup (55,6 per cent). Differences were statistically significant. Conclusions: Shigella sonnei was the predominant serogroup at our hospital.