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E-ISSN : 2148-9696
Crescent Journal of
Medical and Biological Sciences
Jan 2020, Vol 7, Issue 1
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Original Article
Occurrence of Klebsiella pneumoniae in Hospitalized Patients in South of Iran (2014-2016): Assessment of Antibiotic non-susceptibility and Quinolone Resistance Markers
Jalal Mardaneh1,2, Hengameh Zandi3,4, Moulud Tajgardoun5, Zahra Hosseinzadeh6, Gholamreza Pouladfar7, Mojtaba Anvarinejad7
1Department of Microbiology, School of Medicine, Gonabad University of Medical Sciences, Gonabad, Iran
2Student Research Committee, Gonabad University of Medical Sciences, Gonabad, Iran
3Department of Microbiology, School of Medicine, Shahid Sadoughi University of Medical Sciences,Yazd, Iran
4Research Center for Food Hygiene and Safety, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
5International Campus, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
6Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
7Professor Alborzi Clinical Microbiology Research Center, Nemazee Hospital, Shiraz University of Medical Sciences, Shiraz, Iran

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Keywords : Antibiotic resistance,Hospitalized patients, Klebsiella pneumoniae, Quinolone resistance genes
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Objectives: The purpose of current research was to investigate the existence of the aac(6´)-Ib-cr and qnr (qnrS, qnrD, qnrC, qnrB, qnrA) genes and determine the antibiotic sensitivity patterns in the strains of Klebsiella pneumonia, recovered from hospitalized patients in Shiraz, southern Iran.

Materials and Methods: In the current cross-sectional work, the strains isolated from clinical specimens of hospitalized individuals between 2014 and 2016 in Shiraz, Iran, were tested. Culture was done on microbiological media. The strains were recognized as K. pneumonia, based on the bio-chemical tests in the API-20E diagnostic strip. All the strains were investigated for antibacterial sensitivity using the CLSI standard guidelines. Genes encoding antibiotic resistance markers consisting of aac(6’)-Ib-cr, qnrS, qnrD, qnrC, qnrB, and qnrA were evaluated by PCR assay.

Results: Ninety-six strains of K.pneumoniae, isolated from hospitalized patients were entered into the research. 51.04% of strains were recovered from females. 35.66% of the patients were hospitalized in intensive care unit. Sixty-two strains were isolated from urine. Imipenem was the most efficient drug against the strains (81.52%). Less than 50% were sensitive to the new generation of quinolones. All the isolates harboring antibiotic resistance genes were non-susceptible or intermediate level resistance to ciprofloxacin. Most of aac(6’)-Ib-cr+ strains were non-susceptible or intermediate level resistance to piperacillin/tazobactam. In PCR assay, 27.08% isolates had antibiotic resistance traits (aac(6’)-Ib-cr, qnrS, qnrD, qnrC, qnrB, qnrA). The aac(6’)-Ib-cr, qnrS, and qnrB markers were found in 7.3%, 10.4% and 7.3%, respectively.

Conclusion: In this research, the emergence of potentially virulent and carbapenem non-susceptible cases in conjugation with a quinolones resistant genotype is alarming, as a possible result would be vigorous clinical manifestations along with drastic constraints in therapy.


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Articles by Mardaneh J
Articles by Zandi H
Articles by Tajgardoun M
Articles by Hosseinzadeh Z
Articles by Pouladfar G
Articles by Anvarinejad M


Articles by Jalal Mardaneh
Articles by Hengameh Zandi
Articles by Moulud Tajgardoun
Articles by Zahra Hosseinzadeh

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