About: Characterization of virulence genes in Escherichia coli strains isolated from pre-weaned calves in the Republic of Korea

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About: Characterization of virulence genes in Escherichia coli strains isolated from pre-weaned calves in the Republic of Korea Goto Sponge NotDistinct Permalink

An Entity of Type : schema:ScholarlyArticle, within Data Space : covidontheweb.inria.fr associated with source document(s)

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type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
has title	Characterization of virulence genes in Escherichia coli strains isolated from pre-weaned calves in the Republic of Korea
Creator	Kim, Suhee Choi, Kyoung-Seong Park, Jinho Ryu, Ji-Hyoung
Source	Medline; PMC
abstract	BACKGROUND: Escherichia coli is an important cause of diarrhea in calves and its diarrheagenic properties are related to presence of certain virulence genes. In this study, the prevalence of virulence genes F5, F17, F41, sta, stx1, stx2, eae, and saa in E. coli isolated from pre-weaned calves presenting with (n= 329) or without diarrhea (n= 360) was explored using multiplex polymerase chain reaction. We also evaluated the association between detection of E. coli and the presence of diarrhea. RESULTS: Escherichia coli was detected in 56.3% (388/689) of the fecal samples and showed the highest prevalence (66.5%) in 21–40-day-old calves and the lowest (46.3%) among those that were 1–20 days old. The prevalence of the enterotoxigenic E. coli (ETEC) and Shiga toxin-producing E. coli (STEC) pathotypes was detected in 73.9% and 15.9%, respectively. The results showed no association between diarrhea and the presence of E. coli in general, ETEC or STEC. The F17 gene was the most frequently detected virulence factor in E. coli of calves of all ages regardless of diarrhea. Interestingly, the results show that the calves aged 41–60 days with F17-positive E. coli are at a higher risk for production of Shiga toxin (Stx1; 95% confidence intervals: 1.86–31.95; P = 0.005) compared to calves aged 1–20 days; no association between this finding and diarrhea was observed among the calves of this age group. Moreover, the virulence genes associated with the ETEC and STEC strains were not significantly associated with pathogenicity in this study cohort. CONCLUSIONS: These results suggest that while the incidence of E. coli is age-related, there was no relationship linking E. coli virulence genes to calf age and diarrhea. Furthermore, the present study demonstrated that detection of E. coli strains either with or without virulence factors was not associated with diarrhea in pre-weaned calves.
has issue date	2020-08-20(xsd:dateTime)
bibo:doi	10.1186/s13028-020-00543-1
bibo:pmid	32819409
has license	cc-by
sha1sum (hex)	fc4686f071c21400dc6aefc9a7c078d1a0bf8dd1
schema:url	https://doi.org/10.1186/s13028-020-00543-1
resource representing a document's title	Characterization of virulence genes in Escherichia coli strains isolated from pre-weaned calves in the Republic of Korea
has PubMed Central identifier	PMC7439630
has PubMed identifier	32819409
schema:publication	Acta Vet Scand
resource representing a document's body	covid:fc4686f071c21400dc6aefc9a7c078d1a0bf8dd1#body_text
is schema:about of	named entity 'diarrhea' named entity 'evaluated' named entity 'genes' named entity 'virulence' named entity 'DETECTION' named entity 'RELATED' named entity 'ITS' named entity 'genes' named entity 'diarrhea' named entity 'E. coli' named entity 'virulence' named entity 'F41' named entity 'virulence genes' named entity 'diarrhea' named entity 'E. coli' named entity 'Escherichia coli' named entity 'stx2' named entity 'virulence genes' named entity 'Escherichia coli' named entity 'ROK' named entity 'E. coli' named entity 'Takara' named entity 'HUS' named entity 'gene' named entity 'Asan' named entity 'Stx2' named entity 'enteroaggregative E. coli' named entity 'Shiga toxin' named entity 'intestinal epithelial cells' named entity 'enterotoxin' named entity 'virulence factors' named entity 'feces' named entity 'Mungyeong' named entity 'E. coli' named entity 'MacConkey' named entity 'E. coli' named entity 'clinical signs' named entity 'etiological agent' named entity 'E. coli' named entity 'statistically significant' named entity 'enterohemorrhagic E. coli' named entity 'small intestines' named entity '21 days' named entity '21 days' named entity 'Shiga toxins' named entity 'cattle' named entity 'PCR' named entity 'E. coli' named entity 'E. coli' named entity 'E. coli infection' named entity 'fimbrial' named entity 'bacterial colonization' named entity 'diarrhea' named entity 'intimin' named entity 'ETEC' named entity 'Biotechnology' named entity 'immune factors' named entity 'PCR' named entity 'NTEC' named entity 'pathogenesis' named entity 'pathogenic E. coli' named entity 'ETEC' named entity 'gene' named entity 'virulence factors' named entity 'virulence factor' named entity 'gene' named entity 'ETEC' named entity 'septicemia' named entity 'epithelial cells' named entity 'pathogenesis' named entity 'University of Wisconsin-Madison' named entity 'diarrhea' named entity 'enterotoxins' named entity 'Shiga toxin' named entity 'stx2' named entity 'F41' named entity 'NTEC' named entity 'polymerase chain reaction'

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