Pattern of nosocomial infection in two intensive care units of a tertiary care hospital in Karachi

Objective: To determine the pattern of nosocomial infections in two ICUS' of a teaching hospital in terms of frequency, common sites of infection, the pathogens involved and the antibiotic sensitivity patterns. Design: Observational study. Place and Duration of Study: It was conducted in two medical ICUs (Neurology and Nephrology) of a public tertiary care hospital i.e. Civil Hospital, Karachi, from June (o November 2004. Patients and Methods: Data was collected prospectively on patienls suspected to have developed nosocomial infection after 48 hours of admission to the ICU according to objective. Results: There were 101 cases of suspected nosocomial infection oul of a total of 254 patients. The frequency of nosocomial infection was 39.7%. UTI developed in 44.6%. while 27% had blood stream infection, and 21% had pneumonia. Each of the three major sites of infection was strongly associated with the use of invasive devices. Escherichia (E) coli was the most common organism isolated followed by Pseudomonas aeruginosa and Klebsiella, E. coli and Klebsiella showed a maximum sensitivity to Imipenem followed by Tazocin (pipericillen + tazobactam). Pseudomonas aeruginosa was sensitive to Amikasin and Fosfomycin. Amikacin and Fosfomycin. Conclusion: The high frequency of nosocomial infection suggests that more strict measures regarding invasive devices should be taken in future to control the infection and limit the emergence of antibiotic resistant organisms.