Background: Infection and antibiotic resistance become important as public health problems. Objective: To determine bacteria causing infections and their resistance to commonly used antimicrobial agents. Methods: Samples of patients suspected infections were studied: isolating and identifying bacteria, perfoming antimicrobial susceptibility testing by using the Kirby - Bauer disk-diffusion technique, collecting data and analyzing results by Excel. Result: From 2010-2011, 455 clinical isolates of bacteria were studied. The six most common pathogens were: Yeast (32 percent), K. pneumoniae (23 percent), E. coli (21.5 percent), P. aeruginosa (10.5 percent), S. aureus (7.5 percent), A. baumannii (4.6 percent). Almost bacteria were resistant to many antibiotics. Conclusion: Antibiotic resistance of pathogens actually to be warned.