epidemiology of hospitalacquired infections and related anti-microbial resistance patterns in a tertiary-care teaching hospital in zahedan, southeast iran

Healthcare-acquired infections (hais) that patients develop during the course of healthcare treatment are important causes of morbidity and mortality worldwide. the aim of this study was to determine the epidemiology of hais in a tertiarycare teaching hospital in zahedan, southeast iran. this was a crosssectional study of patients admitted to aliibnabitalib hospital, a tertiarycare teaching center, from march 2013 through march 2014. all patients admitted during this study period were examined by head nurses on a daily basis for detecting four types of hais: surgical site infection, urinary tract infection, pneumonia, and bloodstream infection. all the identified hais were registered into the iranian national nosocomial infections surveillance system software. pathogens were identified using standard microbiological methods, and antimicrobial susceptibility was determined by disk diffusion tests according to the clinical and laboratory standards institute guidelines. descriptive statistics were used for data analysis. a total of 16,140 patients were admitted to the hospital during the study period, including 162 found to have hais (approximately 1%). the majority (79.6%) of the hais were reported from the intensive care units (n = 129), followed by the medical wards (10.5%, n = 17) and obstetrics/gynecology ward (7.4%, n = 12). the most common site of infection was the respiratory tract (67.9%) followed by the urinary tract (13.6%). among the pathogens isolated, acinetobacter and enterobacter were the most common (17.6%) followed by escherichia coli (11%). overall, multidrug resistance was observed in 95% of the isolates. the hai prevalence found in this study was lower than hai rates reported in some other studies from iran. the isolates showed high resistance to common antibiotics. guidelines for improving hai surveillance and stringent measures to reduce the prevalence of multidrugresistant hais must be implemented to reduce the rate and the consequences of hais.