Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 27 1-2 1998 03 15 21 26 J. Nowroozi 2015 10 03 Nosocomial infection and its heavy financial cost is a well recognized problem. A variety of sources of organisms involved in nosocomial infection have been identified in recent years. One potential route of bacterial infection is contamination. In order to assess the importance of food contamination, we carried out a survey of bacterial examination of food and the kitchen environment of 14 hospitals. 456 samples were examined. Bacterial growth was observed in 40% and salad yielded the highest frequencies of isolation of bacteria (P https://ijph.tums.ac.ir/index.php/ijph/article/view/1771 https://ijph.tums.ac.ir/index.php/ijph/article/download/1771/1752