Browsing by Author "Al-Agamy M.H."

Now showing 1 - 2 of 2

Antimicrobial resistance pattern and their beta-lactamase encoding genes among Pseudomonas aeruginosa strains isolated from cancer patients
(2014) Zafer M.M.; Al-Agamy M.H.; El-Mahallawy H.A.; Amin M.A.; Ashour M.S.E.-D.; Department of Microbiology and Immunology; Faculty of Pharmacy; Ahram Canadian University; Cairo; Egypt; Department of Pharmaceutics and Microbiology; College of Pharmacy; King Saud University; P.O. Box 2457; Riyadh 11451; Saudi Arabia; Department of Microbiology and Immunology; Faculty of Pharmacy; Al-Azhar University; Cairo; Egypt; Department of Clinical Pathology; National Cancer Institute; Cairo University; Cairo; Egypt; Department of Microbiology and Immunology; Faculty of Pharmacy; Cairo University; Cairo; Egypt; Department of Microbiology and Immunology; Faculty of Pharmacy; Modern Science and Arts University; 6th October City; Giza; Egypt
This study was designed to investigate the prevalence of metallo-?-lactamases (MBL) and extended-spectrum ?-lactamases (ESBL) in P. aeruginosa isolates collected from two different hospitals in Cairo, Egypt. Antibiotic susceptibility testing and phenotypic screening for ESBLs and MBLs were performed on 122 P. aeruginosa isolates collected in the period from January 2011 to March 2012. MICs were determined. ESBLs and MBLs genes were sought by PCR. The resistant rate to imipenem was 39.34%. The resistance rates for P. aeruginosa to cefuroxime, cefoperazone, ceftazidime, aztreonam, and piperacillin/tazobactam were 87.7%, 80.3%, 60.6%, 45.1%, and 25.4%, respectively. Out of 122 P. aeruginosa, 27% and 7.4% were MBL and ESBL, respectively. The prevalence of bla VIM2, bla OXA10-, bla VEB1, bla NDM-, and bla IMP1-like genes were found in 58.3%, 41.7%, 10.4%, 4.2%, and 2.1%, respectively. GIM-, SPM-, SIM-, and OXA-2-like genes were not detected in this study. OXA-10-like gene was concomitant with VIM-2 and/or VEB. Twelve isolates harbored both OXA-10 and VIM-2; two isolates carried both OXA-10 and VEB. Only one strain contained OXA-10, VIM-2, and VEB. In conclusion, bla VIM2- and bla OXA10-like genes were the most prevalent genes in P. aeruginosa in Egypt. To our knowledge, this is the first report of bla VIM2, bla IMP1, bla NDM, and bla OXA10 in P. aeruginosa in Egypt. � 2014 Mai M. Zafer et al.
Molecular characterization of carbapenem-insensitive Acinetobacter baumannii in Egypt
(Elsevier B.V., 2014) Al-Agamy M.H.; Khalaf N.G.; Tawfick M.M.; Shibl A.M.; El Kholy A.A.; Pharmaceutics and Microbiology Department; College of Pharmacy; King Saud University; PO Box 2457; Riyadh 11451; Saudi Arabia; Microbiology and Immunology Department; Faculty of Pharmacy; Al-Azhar University; Cairo; Egypt; Microbiology and Immunology Department; Faculty of Pharmacy; Modern Arts and Science University; Sixth of October City; Egypt; Clinical Pathology Department; Faculty of Medicine; Cairo University; Cairo; Egypt
Objectives: This study investigated the prevalence of diverse Ambler class ?-lactamase-encoding genes in 40 carbapenem-insensitive Acinetobacter baumannii isolates collected from two hospitals in Egypt during the period January-March 2012. Methods: The resistance levels to different groups of antimicrobial agents were determined. PCR was used to detect the different Ambler class ?-lactamases encoding the following genes: blaTEM, blaSHV, blaCTX-M, blaVEB, blaPER, blaGES, blaVIM, blaIMP, blaSIM, blaSPM, blaGIM, blaNDM, blaADC, blaOXA-23, blaOXA-24, blaOXA-51, and blaOXA-58. ISAba1 and int1 were detected by PCR. Results: The isolates were 100% resistant to amoxicillin-clavulanate, aztreonam, cefepime, cefotaxime, and ceftazidime. Of the isolates, 5% were resistant to colistin, 45% to amikacin, 70% to imipenem, and 85% to ciprofloxacin. The blaADC- and blaOXA-51-like genes were detected in the entire collection. The prevalences of blaOXA-23, blaOXA-24, and blaOXA-58 were 50%, 7.5%, and 5%, respectively. However, the prevalences of blaTEM-, blaPER-, and blaGES-like genes were 87.5%, 55%, and 27.5%, respectively. SHV, CTX-M, VEB, KPC, and MBL encoding genes were not detected. The ISAba1 was found upstream to blaOXA-51, blaOXA-23, and blaADC in 85%, 80%, and 50%, respectively. Of note, 45% (18/40) of the isolates co-produced extended-spectrum ?-lactamases (PER and GES) and carbapenemases (OXA-23 and OXA-58). Conclusions: The blaADC-, blaTEM-, blaPER-, blaOXA-23-, and blaGES-like genes were found to be the most prevalent types of ?-lactamase-encoding gene in A. baumannii collected from Egypt. A high level of carbapenem resistance is mediated by blaOXA-23, blaOXA-24, and blaOXA-58 (minimum inhibitory concentration (MIC) 32 to >256?g/ml), and a low level of carbapenem resistance is mediated by blaGES (MIC 4-16?g/ml) and by up-regulation of ISAba1-OXA-51 (MIC 1-4?g/ml). Class B MBL was not identified to play a role in carbapenem resistance in A. baumannii isolates from Egypt. � 2014 The Authors.