The aim of this study was the evaluation of occurrence and antimicrobial susceptibility of M morganii rods isolated from clinical samples. This study included 201 strains isolated in the Clinical Microbiology Department of Dr. A. Jurasz University Hospital in 2008-2010. Identification to species was carried out on the basis of the results of biochemical reactions included in the tests ID 32E and VITEK2 GN. Antimicrobial susceptibility of M. morganii rods was determined by the disk-diffusion method on Mueller-Hinton II Agar. Strains of M morganii most commonly isolated from skin and soft tissue, and material taken from the urinary tract, mainly from patients of Anesthesiology and Intensive Care Unit, Department of General and Vascular Surgery and Department of General Surgery and Endocrinology. All of M morganii strains isolated during the three years were susceptible to carbapenems. We reported decrease of strains susceptible to piperacillin and chloramphenicol. In 2010 we showed a higher percentage of strains intermediate to tigecycline, compared with 2009. We observed increase in the percentage of strains resistant to cefoperazone with sulbactam and reported decrease in the percentage of strains resistant and intermediate to aminoglycosides. Extended Spectrum Beta-Lactamases were produced by 13 (6,5%) of M morganii strains.
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