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- W4294686935 abstract "Introduction: Diarrheagenic Escherichia coli (DEC) are responsible for about 30–40% of acute diarrhoea episodes in developing countries. Up to 10% of isolates of E. coli from stool specimens have been reported to be non-lactose fermenting (NLF E. coli). There is scarcity of literature available regarding the pathogenicity of NLF E. coli causing infectious diarrhoea. Aim: We aimed to elucidate the importance of NLF E. coli in causing diarrhoea in both adults as well as children by detecting various DEC pathotypes among NLF E. coli in stool samples from gastroenteritis cases. Material and Methods: A total of 376 non-lactose fermenting (NLF) E. coli isolates isolated from 3110 stool samples of diarrhoea/ gastroenteritis patients were included in the study. Upto 3 non-lactose fermenting colonies which did not confirm as V.cholerae, Aeromonas spp., Salmonella spp., Shigella spp., but were  identified as E.coli on MALDI-TOF were selected from each MacConkey agar plate and streaked onto fresh, sterilized nutrient agar and biochemical reactions were put up. Multiplex PCR was put up for EAEC, EPEC, ETEC, EHEC pathotypes and PCR for ipaH gene was put up for EIEC. Antibiotic sensitivity testing was performed with the disc diffusion method. Results: Using multiplex PCR and ipaH PCR, a total of 63 pathotypes of DEC were obtained, EAEC being the most predominant (n= 31) followed by EIEC (n=22), EPEC (n=8) and ETEC (n=2). To further differentiate EIEC from Shigella, additional biochemicals were performed which include acetate utilization, mucate and salicin fermentation, and esculin hydrolysis. Antimicrobial susceptibility testing (AST) showed that maximum resistance was seen against ciprofloxacin (82.5%) followed by ampicillin (77.8%) and cotrimoxazole (68.2%) and minimum resistance was seen against ertapenem (4.8%). Conclusion: In our study two pathotypes (EAEC, EIEC) were predominant among NLF E. coli and these were important etiological agents not only in children but also in adults. Our study also sheds light on epidemiology of EIEC which is one of the most neglected DEC pathotype as hardly any microbiological laboratory process NLF E. coli for EIEC." @default.
- W4294686935 created "2022-09-06" @default.
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- W4294686935 date "2022-09-01" @default.
- W4294686935 modified "2023-10-18" @default.
- W4294686935 title "Editor response for version 1" @default.
- W4294686935 doi "https://doi.org/10.1099/acmi.0.000459.v1.5" @default.
- W4294686935 hasPublicationYear "2022" @default.
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