| Research in Molecular Medicine (RMM)
Volume 6, Issue no. 1, DOI 10.18502/rmm.v6i1.3931
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Research Article
Different Features of Escherichia coli and
Klebsiella pneumoniae in Children and Adults
Vajihe Sheikhalizadeh1, Mohammad Ahangarzadeh Rezaee2,
Nastaran Langarizadeh3, and Hamid Reza Goli4
1PhD Fellow, Department of Medical Microbiology, Faculty of Medicine, Tabriz University of
Medical Sciences, Tabriz, Iran
2Associate Professor, Immunology Research Center and Department of Medical Microbiology,
Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
3Nastaran Langarizadeh, PhD student, Department of Biotechnology, Ege University, Izmir,
Turkey
4Hamid Reza Goli, Assistant Professor, Department of Medical Microbiology and Virology,
Mazandaran University of Medical Sciences, Sari, Iran
Abstract
Introduction: This study aimed to describe the association between age groups and
antimicrobial susceptibility patterns, as well as integron presence in Escherichia coli
and Klebsiella pneumoniae isolates from Tabriz, Iran.
Materials and methods: Equal numbers of isolates from adults and children, 140
for E. coli and 150 for K. pneumoniae, were examined for susceptibility to 13
routine antibiotics. Integron existence in multidrug resistant (MDR) isolates was also
determined using PCR-RFLP.
Results: Significant age-related differences were observed in the resistance rates of
K. pneumoniae toward cotrimoxazol, nalidixic acid, ciprofloxacin, and norfloxacin. For
E. coli, age-related differences in the resistance rates to tetracycline, chloramphenicol,
ciprofloxacin, and norfloxacin were significant. PCR-RFLP results revealed the pres-
ence of class 1 integron (intI1) in 24.5% and 19.2% of MDR E. coli in children and adults,
respectively. In K. pneumoniae, 72.9% of isolates from children and 84% from adults
were positive for intI1. The prevalence of class 2 integrons was significantly associated
with age, in both E. coli and K. pneumoniae. No class 3 integrons were detected in this
study. |