Are TEM and CTX Beta-Lactamase genes common among urinary isolates from Ain Shams University Hospitals, Intensive Care Units? | ||||
| Egyptian Journal of Medical Microbiology | ||||
| Article 15, Volume 30, Issue 2, April 2021, Page 107-115 PDF (535.56 K) | ||||
| Document Type: New and original researches in the field of Microbiology. | ||||
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| Author | ||||
Nadia M. Elsheshtawy 
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| Medical Microbiology & Immunology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt. | ||||
| Abstract | ||||
| Background: Many extended-spectrum β-lactamases (ESBLs) variants are known among Gram-negative bacilli, and are classified into different structural families as TEM, SHV, CTX-M, and OXA. Objectives: To detect the distribution of blaTEM and blaCTX-M genes among the Gram-negative isolates collected from urine samples from patients admitted to ICUs of Ain Shams University Hospitals, Egypt. Methodology: Forty Gram-negative urinary isolates were enrolled, and subjected to microbiological identification and antimicrobial susceptibility testing. Phenotypic detection of ESBLs production was done. Detection of blaTEM and blaCTX-M genes was done by PCR. Results: Phenotypically, 8(20%) isolates were ESBL producers and 32(80%) were non ESBL producers. BlaTEM gene was found in 15 isolates(37.5%) and blaCTX-M gene was found in 8 isolates(20%), while both genes were detected among five isolates. Conclusion: Molecular methods should be used for definitive identification of ESBLs. BlaTEM gene was more common than blaCTX-M gene in urine specimens in our setting. | ||||
| Keywords | ||||
| Antimicrobial susceptibility testing; blaTEM; blaCTX-M; ESBLs | ||||
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