Total of 3452 available samples were included in the study. 1607 positive culture results were documented (46.6%). The most commonly isolated microorganisms (10 isolates or more) are given in the order of frequency of their occurrence in the . The sensitivity pattern of gram negative rods (GNR) to most common antibiotics is shown in .
List of the most commonly isolated microorganisms at four major tertiary care centers in Tbilisi, Georgia, 2011.
The sensitivity of microorganisms to antibiotics, Georgia, 2011.
Out of 95 isolates of GNRs tested for the presence of extended-spectrum beta-lactamase (ESBL) 33.7% was found to be ESBL carriers (K. pneumonia −24, E. coli – 4, K. oxytoca – 2, P. mirabilis – 1, C. freundii −1). The vast majority of GNRs were sensitive to colistin, but we have identified eight colistin resistant strains: Pseudomonas aeruginosa – 1, E. coli – 2, K. oxytoca – 1, K. pneumonia – 1, P. mirabilis – 2, K. terrigena – 1. The most common gram positive cocci (GPC) were S. aureus, S. epidermidis and E. faecalis. 33.3% of S. aureus and 36.1% of S. epidermidis were Methicillin resistant. All of the GPC isolates were vancomycin sensitive.
Overall 66 stool samples from 53 patients with diarrhea, which had developed during their hospitalization were evaluated for Clostridium defficile A and B toxins. 25 (37.8%) samples from 20 (37.7%) patients were found to be positive for Clostridium defficile.