Last modified: 2018-08-14
Abstract
Staphylococcus aureus is an opportunistic organism responsible for most nosocomial infection. From a total of 100 staphylococci isolates, 41 were S. aureus collected from 8 (19.5%) tonsillitis, 9 (22%) Skin , 13 (31.7%) wound, 6 (14.6%) nose and 5 (12.2%) from ear infection samples. All bacterial isolates were identified by the biochemical, cultural and microbial characteristics confirmed by Api Staph System. β-lactamase test of S. aureus revealed that (21) isolates were positive. While 31 (75.61%) were able to produce urease. The sensitivity test of four quinolones groups showed that (50.2%) isolates were resistant to norfloxacin, (44.1%) were resistant to ofloxacin and (39.8%) were resistant to ciprofloxacin. While the lowest resistance was (25.7%) to levofloxacin. The β-lactamase positive S. aureus showed a high resistance in compare to that β-lactamase negative isolates. The range of the minimum inhibitory concentrations of levofloxacin was (16-512 µg\ml). A single plasmid was detected in tow isolates with same size. The DNA plasmid was determined from levofloxacin resistant isolates.
Published 01 August 2018