Plasmid Replicon Typing of Enteroaggregative Escherichia coli Isolates Isolated from Diarrheal Children Using PCR Method Based on Plasmid Incompatibility Groups
Volume 66, Issue 6, January and February 2024
zakiyeh imanpanah, Gholamreza Hashemitabar, Mahdi Askari Badouei
Abstract Introduction: Plasmids play a the crucial role in the horizontal transfer of genes, especially antibiotic resistance and pathogenic agents, and not epidemiological studies have been conducted on the type of plasmids transmitted by Enteroaggregative Escherichia coli pathotypes. The main purpose of this study is to classify the plasmids of Enteroaggregative Escherichia coli isolates isolated from children with diarrhea based on the major incompatible plasmid groups according method of Johnsnon et al(2007).
Materials and Method: This descriptive study was performed on 44 isolates of Enteroaggregative Escherichia coli Isolates Isolated from Diarrheal to identify 18 plasmid replicons by The method of Johnsnon et al(2007).
Results: The results showed the FreP 35(79.54%) plasmid replicon was the most frequent and L/M plasmid replicon was the least frequent with 1(2.27%). IncFIC, IncN, IncW, Inc X, Inc HI1, Inc HI2 and IncFIIA replicons were not observed in any of the isolates.
Conclusion: The results of this study indicated a high diversity of profile plasmid incompatibility groups among the studied isolates.
Investigation of Prevalence, Phylogenetic Groups and Antibiotic Resistance Patterns of Enteroaggregative Escherichia coli(EAEC)Isolated from Diarrheic children in Mashhad
Volume 65, Issue 5, May and June 2022
Zakiyeh Imanpanah, Mahdi Askari Badouei, Gholamreza Hashemi Tabar, Kiarash Ghazvini
Abstract Introduction Purpose of this study was to investigate of prevalence, phylogenetic groups and antibiotic resistance pattern EAEC isolated from diarrheic children in Mashhad city. Material and Method This cross-sectional study conducted for one year. In total, 450 diarrhea samples of children under 10 years of age were collected from children's specialized hospital in Mashhad. After isolation of Escherichia coli, EAEC isolates were identified by PCR molcular method. Phylogenetic groups of EAEC isolates were determined using the original and updated 2019 method. Antimicrobial susceptibility test was performed using disc diffusion methods(Kirby-Bauer method) against 12 antibiotics. Results 44(9.8%) EAEC isolates were identified from 422(93.8%) Escherichia coli isolates by PCR. Seven phylogroups including D(40.9%), unknown(27.3%), G(11.4%), B1(9.1%), F(4.5%), B2(4.5%) and A(2.3%) were detected among EAEC isolates.The highest diversity of antibiotic resistance patterns was related to Phylogroup D. EAEC isolates showed the highest resistance to amoxicillin and erythromycin 100%. Overall, 97.7% of EAEC isolates were with multiple drug resistance(MDR). Conclusion The present study showed a significant presence of EAEC strains. Considering the role of EAEC in chronic diarrhea and growth retardation syndrome in children, it is suggested that the identification of EAEC strains to be considered in diagnostic laboratories in cases of children’s diarrhea. on the other hand, due to the high prevalence of multiple resistances, antibiogram test is required to treat diarrhea in children.