RÉSUMÉ
La frecuencia de los diferentes agentes causantes de diarrea puede variar en distintas regiones, en poblaciones de diferente nivel socio económico y a través del tiempo. En 304 pacientes diarreicos, la bacteria más frecuentemente hallada fue Campylobacter jejuni, en 30 casos (9,9 %), la mayoría con heces con moco y/o sangre. Fue el agente predominante tanto en niños como en adultos. Salmonella se aisló en 18 (5,9 %) y Escherichia coli enteropatógeno (ECEP) en 7 (2,3 %). Fue llamativo que no se aislaron especies de Shigella. ECEP se aisló en muy pocos casos y sólo en niños menores de 5 años, contrastando con estudios anteriores en que se presentaba como la bacteria predominante. Debe tomarse en consideración que actualmente en nuestro medio los casos de diarrea inflamatoria mucosanguinolenta son frecuentemente causados por C jejuni.
Bacterial agents causing diarrea in patients attended in a hospital of Rosario, Argentina. The frequency of bacterial agents causing diarrhoea can vary in patients of different areas, and through the time. In an epidemiological surveillance we studied 304 patients with diarrhoeal diseases looking for Salmonella enterica, Shigella spp, Campylobacter spp, Aeromonas spp, Yersinia enterocolitica, and diarrheogenic Escherichia coli. C jejuni was isolated in 30 patients (9,9 %), Salmonella in 18 (5,9 %), and enteropathogenic E coli (EPEC) in 7 (2,3 %). Most cases due ton C jejuni had mucus and/or blood in their feces. Unexpectedly we didnt fine any cases due to Shigella spp. There was much less cases due to EPEC than in our previous studies, and occurred only in children of les s than 5 years old. It is necessary to take in consideration that C jejuni cause nearly all the cases of diarrhoea in patients with mucus and blood in their feces actually in our region.
Sujet(s)
Humains , Animaux , Nourrisson , Enfant d'âge préscolaire , Enfant , Adulte , Infections à Campylobacter/épidémiologie , Campylobacter jejuni/isolement et purification , Infection croisée/épidémiologie , Diarrhée/microbiologie , Argentine/épidémiologie , Infections à Escherichia coli/épidémiologie , Escherichia coli/isolement et purification , Fèces/microbiologie , Salmonelloses/épidémiologie , Salmonella/isolement et purificationRÉSUMÉ
Multidrug-resistant tuberculosis has emerged over the last two years at Carrasco Hospital, located in Rosario city. Nosocomial transmission among 7 AIDS patients admitted into the same ward between June and December/94 was supported by temporal clustering of cases, matching drug susceptibility, and identical lS6llO fingerprints. Among 8 non-HIV chronic cases without evidence of reciprocal contact outside the hospital, two additional clusters of 2 and 4 cases, respectively, were identified. The latter was found to be generated by a strain genetically related to the one that infected AIDS patients. lt is hypothesized that an ancestor strain, common to both, might have been brought into the hospital long before the outbreak was first suspected.