Molecular investigation of Campylobacter spp. and salmonella infection in children with community acquired diarrhea

authors:

avatar Haniyeh Ahadi , avatar Bahareh Attaran , avatar Roxana Mansour Ghanaiee ORCID , * , avatar Leila Ganji , avatar Fatemeh Fallah , avatar Abdollah Karimi ORCID , avatar Iraj Sedighi ORCID , avatar Marjan Tariverdi , avatar Alireza Nateghian , avatar Negin Nahan-Moghadam , avatar Masoud Alebouyeh ORCID

Koomesh: Vol.24, issue 5; 684-690
published online: December 01, 2022
article type: Research Article
received: December 02, 2021
accepted: April 01, 2022

how to cite: Ahadi H, Attaran B, Mansour Ghanaiee R, Ganji L , Fallah F, et al. Molecular investigation of Campylobacter spp. and salmonella infection in children with community acquired diarrhea. koomesh. 2022;24(5):e152779. 

Abstract

Introduction: Acute gastroenteritis is a typical disorder that accounts for 8-12% of pediatric outpatient visits. Campylobacter and Salmonella infections account for about 8.4% and 11% of global diarrhea cases. Due to the importance of these bacteria in pediatric diseases, the aim of this study was to determine the infectious rate of Salmonella and Campylobacter species and also the frequency of the gene encoding Cytholethal distending toxin in children with community-acquired diarrhea. Materials and Methods: Stool samples of children under 5 years of age with diarrhea were collected. The samples were related to children referred to hospitals in Hamadan, Ardabil, Bandar Abbas and two hospitals in Tehran. DNA was extracted from the samples using a DNA extraction kit from stool. The presence of Campylobacter in the studied samples was detected by polymerase chain reaction using specific primers. A control stool sample was spiked with 10-fold dilution of C. jejuni suspension for LOD (detection limit determination) measurement. Results: In this study, PCR results showed a LOD of 100 CFU per gram in the spiked feces sample. Accordingly, out of 144 fecal samples of children with acute diarrhea, one case was positive for Campylobacter jejuni; this sample was also positive for the presence of cdtB gene. Presence of Salmonella was confirmed in two samples of the patients (1.4%). Conclusion: Low prevalence of Campylobacter and Salmonella was detected in symptomatic children under 5 years of age during the Covid-19 pandemic. Examination of these samples for viruses and other microbial agents can clarify the etiology of diarrhea in children referred to the hospitals.

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