Prevalence of AmpC and Extended-Spectrum Beta-Lactamase Genes in Klebsiella pneumoniae and Escherichia coli Isolates

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Jahantabi Alireza; HOSSEINI FARZANEH; ASGHARZADEH MOHAMMAD; Akhavan Sepehi Abbas; SAMADI KAFIL HOSSEIN

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Journal: Iranian Red Crescent Medical Journal Year:2020 | Volume:22 | Issue:2 Page(s): 0-0

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Title

Prevalence of AmpC and Extended-Spectrum Beta-Lactamase Genes in Klebsiella pneumoniae and Escherichia coli Isolates

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Keywords

Escherichia coli

Klebsiella pneumoniae

Gen

ESBL

AmpC -lactamases

CTX-M-1

Abstract

Background: In recent years, the prevalence of antibiotic resistance has steadily increased and also the antibiotic-resistant strains producing extended-spectrum beta-lactamases (ESBLs) and AmpC beta-lactamases have emerged among the Enterobacteriaceae, predominantly in Escherichia coli and Klebsiella pneumoniae species. Objectives: This prospective study aimed at determining the production of ESBL or AmpC, phenotypically and also at the molecular level, in E. coli and K. pneumoniae isolates collected from various clinical specimens. Methods: In total, 78 K. pneumoniae and 92 E. coli isolates were collected from various clinical infectious sources available in different wards of the Imam Reza Hospital, Tabriz, Iran, from July 2017 to December 2018. All isolates were subjected to antimicrobial susceptibility testing. MAST 4-disc test and polymerase chain reaction (PCR) were applied for phenotypic and Genotypic detection of ESBLs and plasmid-encoded AmpCs (pAmpCs) among isolates, respectively. Results: Overall, 78 K. pneumoniae and 92 E. coli isolates were evaluated, of which 46 K. pneumoniae (58. 9%) and 51 E. coli (55. 4%) isolates were resistant to cefotaxime/ceftazidime and included in the study. Among the K. pneumoniae and E. coli isolates resistant to cefotaxime/ceftazidime, 40(86. 9%)and40(78. 4%) isolates were ESBL producersand8 (17. 3%)and2 (3. 9%) isolates werepAmpCproducers, respectively. In addition, 40 E. coli (78. 4%) isolates were positive for both CTX-M-14 and CTX-M-15 Genes. Regarding K. pneumoniae isolates, 40isolates (86. 9%) were positive for CTX-M-15 Geneand 18 isolates (39. 1%) for CTX-M-14 Gene. Among51 ceftazidime/cefotaximeresistant E. coli isolates, 32 isolates (62. 7%) were positive for DHA-1 Gene and 33 isolates (64. 7%) isolates for CMY-2 Gene. Also, among 46 ceftazidime/cefotaxime-resistant K. pneumoniae isolates, 15 isolates (32. 6%) had DHA-1 Gene and 27 isolates (58. 7%) had CMY-2 Gene in the Genome. Conclusions: The high prevalence of ESBL and AmpC production among E. coil and K. pneumoniae isolates was a serious concern in the studied region. Therefore, a simple and rapid PCR-based technique is essential to detect and distinguish various pAmpC and ESBL Genes to discriminate other resistance determinants.

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APA: Copy

Jahantabi, Alireza, HOSSEINI, FARZANEH, ASGHARZADEH, MOHAMMAD, Akhavan Sepehi, Abbas, & SAMADI KAFIL, HOSSEIN. (2020). Prevalence of AmpC and Extended-Spectrum Beta-Lactamase Genes in Klebsiella pneumoniae and Escherichia coli Isolates. IRANIAN RED CRESCENT MEDICAL JOURNAL (IRCMJ), 22(2), 0-0. SID. https://sid.ir/paper/768333/en

Vancouver: Copy

Jahantabi Alireza, HOSSEINI FARZANEH, ASGHARZADEH MOHAMMAD, Akhavan Sepehi Abbas, SAMADI KAFIL HOSSEIN. Prevalence of AmpC and Extended-Spectrum Beta-Lactamase Genes in Klebsiella pneumoniae and Escherichia coli Isolates. IRANIAN RED CRESCENT MEDICAL JOURNAL (IRCMJ)[Internet]. 2020;22(2):0-0. Available from: https://sid.ir/paper/768333/en

IEEE: Copy

Alireza Jahantabi, FARZANEH HOSSEINI, MOHAMMAD ASGHARZADEH, Abbas Akhavan Sepehi, and HOSSEIN SAMADI KAFIL, “Prevalence of AmpC and Extended-Spectrum Beta-Lactamase Genes in Klebsiella pneumoniae and Escherichia coli Isolates,” IRANIAN RED CRESCENT MEDICAL JOURNAL (IRCMJ), vol. 22, no. 2, pp. 0–0, 2020, [Online]. Available: https://sid.ir/paper/768333/en

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