Author/Authors :
Khosravani Seyed Abdolmajid نويسنده Department of Microbiology, Yasuj University of Medical Sciences, Yasuj, IR Iran , Mardaneh Jalal نويسنده Prof. Alborzi Clinical Microbiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran , Sharifi Asghar نويسنده Assistant Professor in Educational Managment, Tehran Science and Research Branch, Tehran, Iran. , Manzouri Leila نويسنده Department of Community Medicine, School of Medicine, Isfahan University of Medical Science, Isfahan , Khoramrooz Seyed Sajjad نويسنده Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, IR Iran , Behzad-Behbahani Abbas نويسنده Technology Research Center, School of Paramedical Sciences,Department of Biotechnology, Diagnosis Laboratory Sciences,Shiraz University of Medical Sciences,Shiraz,Iran , Izadi Pour Jahromi Shahrbanou نويسنده Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, IR Iran , Pezeshkpour Vahid نويسنده Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, IR Iran , Seyyedi Noorossadat نويسنده Diagnostic Laboratory Sciences and Technology Research Center, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, IR Iran , Rafiei Dehbidi Gholamreza نويسنده Diagnostic Laboratory Sciences and Technology Research Center, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, IR Iran , Pourmasoudi Masoud نويسنده Diagnostic Laboratory Sciences and Technology Research Center, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, IR Iran
Abstract :
[Background]Pseudomonas aeruginosa is a Gram negative ubiquitous opportunistic organism and one of the more problematic drug-resistant pathogens encountered today.[Objectives]The aims of the current multicenter research were to assess antibiotic resistance profiles, carbapenemase production, and detection of antibiotic resistance IMP gene as well as virulence factors genes including exoA, algD, lasB, and plcH among the clinical isolates of P. aeruginosa.[Methods]A total of 80 nonduplicate isolates of P. aeruginosa were recovered from inpatients. Bacterial identification was done by standard diagnostic tests. Species was confirmed by detection of the exoA gene using the PCR technique. Antimicrobial susceptibility test was performed according to the Clinical and Laboratory Standards Institute (CLSI) guidelines. Carbapenemase production among the isolates was determined by the modified Hodge test. Virulence genes were detected by PCR.[Results]A total of 42 (52.5%) isolates recovered from wound specimens. Colistin was the most effective antibiotic against isolates (97.5% isolates were susceptible) and levofloxacin was the least effective drug (67.5% isolates were resistant). The most common antibiotic resistance pattern was CIPR-CPMR-GEMR (47 isolates). In total, 47 (58.75%) isolates were identified as multidrug resistance (MDR), while 30% of isolates were carbapenemase producer (MHT+). Among studied isolates, plcH+ and lasB+ genotypes (100% isolates) were the most common virulence gene patterns. Of 80 P. aeruginosa isolates, 39 (48.75%) showed algD+, plcH+, lasB+, and IMP+ genotype. The blaIMP resistance gene was detected in all MHT positive and MDR isolates.[Conclusions]In our study, the emergence of potentially highly pathogenic and carbapenem-resistant strains in joining with a MDR phenotype is alarming, as a feasible outcome would be a severe clinical result concomitant with critical restrictions in antibiotic therapy.
