"drug resistance pattern in isolated bacteria from blood cultures"

bacteremia is an important infectious disease which may lead to death. common bacteria and pattern of antibiotic resistance in different communities are different and understanding these differences is important. in the present study, relative frequency and pattern of drug resistance have been examined in bacteria isolated from blood cultures in razi hospital laboratory. the method of the study was descriptive. data collection was carried out retrospectively. total sample consisted of 311 positive blood cultures from 1999 to 2001. variables under study were bacterial strains, antibiotics examined in antibiogram, microbial resistance, and patients' age and sex. the most common isolated bacteria were salmonella typhi (22.2%) and the least common ones were citrobacter (1.6%). the highest antibiotic resistance was seen against amoxicillin (88.4%). the proportion of males to females was1: 1/1 and the most common age group was 15-44 (47.3%). common bacteria and pattern of antibiotic resistance were different in some areas and this subject requires further studies in the future.