RESUMEN
Diarrheagenics Escherichia coli are the major agents involved in diarrheal disease in developing countries. The aim of this study was to evaluate the time of appearance of the first asymptomatic infection by the different categories of diarrheagenic E. coli in 44 children since their birth and during the first 20 months of their lives. In all of the children studied, we detected at least one category of diarrheagenic E. coli through the 20 months of the study. 510 diarrheagenic E. coli (33.5 percent) were obtained from the 1,524 samples collected from the 44 children during the time of the study (31.4 percent EAggEC, 28.8 percent EPEC, 27.1 percent DAEC, and 12.7 percent ETEC). Neither EHEC nor EIEC were identified. The median age for diarrheagenic E. coli colonization was 7.5 months. The mean weaning period was 12.8 months and the mean age for introduction of mixed feeding (breast fed supplemented) was 3.8 months. A significantly lower incidence of diarrheal disease and asymptomatic infections was recorded among the exclusively breast-fed rather than in the supplemented and non breast-fed infants. For ETEC, EPEC and EAggEC the introduction of weaning foods and complete termination of breast-feeding were associated with an increase of asymptomatic infections
Asunto(s)
Humanos , Lactante , Recién Nacido , Diarrea Infantil/microbiología , Infecciones por Escherichia coli/microbiología , Argentina , Lactancia Materna , Sondas de ADN , Escherichia coli/clasificación , Escherichia coli/aislamiento & purificación , Estudios de Seguimiento , Factores de Riesgo , Factores de TiempoRESUMEN
El presente trabajo informa de la calidad y susceptibilidad de los gérmenes involucrados en la infección nosocomial durante el año 1988, en pacientes internados en el Sector Pediatría del Hospital Ramón Madariaga. Sobre un total de 1749 muestras clínicas estudiadas, se obtuvo un 23,44%de positividad. El tipo de infección más frecuente fue heridas quirúrgicas y tejidos blandos superficiales, como es de esperar en la población pediátrica. Los agentes etiológicos predominantes fueron los bacilos gram (-) con marcada resistencia a antibióticos betaláctamicos y gentamicina