[Analysis of nosocomial infection in hospitalized critical and serious patients].

An investigation was made on 298 hospitalized critical and serious patients in Chongqing. the results showed that the nosocomial infection rate was 43.3% (129/298). The higher infection rate was found in the departments of brain surgery and hematopathy. The lower respiratory tract was found to be the most commonly seen infection sites (65.1%). Of 46 strains of the pathogenic organisms causing the nosocomial infection, gram-negative becilli were accounted for 52.2% and fungi 28.3%. The case fatality rate of infected patients (37.9%) was significantly higher than that of non-infected patient's (10.7%).