RESUMEN
Background: pneumonia is the second most frequent nosocomial infection. The incidence ranges from 4 to 50 cases per 1000 hospital admissions. The purpose of this study was to determine the prevalence of nosocomial lower respiratory tract infection caused by multi drug resistance bacteria in patients submitted in Baqyiatallah hospital during one year of period
Materials and Methods: the study was conducted prospectively during a period of 12 months from March to February 2005 in Baqyiqtallah hospital in Tehran, Iran and focusing on respiratory tract microbiology in the first 24 h following diagnosis of acute respiratory distress syndrome. Bacterial strains were isolated from various clinical samples of patients and identified by the conventional methods. Susceptibility testing was performed on isolates using the agar disc-diffusion technique
Results: the prevalence of nosocomial pneuminia during this study period was 41.7%.The most nosocomial infections were belonged to intensive care unit [ICU]. The most prevalent organism was Staphylococcus aureus [41.4%] followed by Pseudomonas auroginosa [26.7%]
Conclusion: nosocomial pneumonia rate in current study was lower than those reported by other researchers; however, the most prevalence of nosocomial pneumonia was from ICU and patients with more than 50 years of ages. There is a need to study more the causes of nosocomial pneumonia and development of preventative strategies in order to prevent the spread of nosocomial infections