Cited by 83Escherichia coli research studiesMilk Quality and Mastitis in Dairy CowsMicrobial infections and disease research

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Virulence factors of Escherichia coli isolated from bovine clinical mastitis

Abstract

Escherichia coli isolates from bovine mastitis were examined for a selection of virulence factors. The strains originated from Finland and Israel, which have differences in the proportion of mastitis caused by E. coli, clinical pictures of coliform mastitis, environmental conditions and herd management. The genes of nine virulence factors were detected by polymerase chain reaction. Presence of K1 and K5 capsules was assessed by use of specific bacteriophages. Serum resistance was tested by a turbidimetric assay. Out of 160 Finnish isolates, 37% had traT, 14% cnf2, 8% cnf1, 11% aer, 9% f17, 8% sfa, 7% pap, 1% afa8D and 1% afa8E. Out of 113 Israeli isolates, 41% had traT, 4% aer, 3% cnf2, 1% cnf1, 1% sfa and 1% f17. Some of the genes were distributed among two major pathotype groups, with either f17 family or sfa, pap and cnf1 as major determinants. Genes for F17a, CS31A, Afa7D and Afa7E were not detected. Altogether 49% of Finnish and 42% of Israeli isolates had at least one virulence gene, but genes other than traT were present in only 24% of Finnish and 5% of Israeli isolates. Serum resistance was more common among Finnish (94/160) than Israeli isolates (19/113). K1 and K5 capsules were not detected.

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Crossref · 10.1016/s0378-1135(01)00483-7

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  • Resistance to the bactericidal activity of serum is a virulence factor common to many coliform bacteria causing clinical mastitis, but is not a prerequisite for pathogenicity.

    “Resistance to the bactericidal activity of serum is a virulence factor common to many coliform bacteria causing clinical mastitis, but is not a prerequisite for pathogenicity [14, 26, 36, 52].”

    From Coliform mastitis (2003) · cites this paper as [36]

Citations

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Research works printed but not linked: 28

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  3. Bertin, 1998, Association of genes encoding P fimbriae, CS31A antigen and EAST 1 toxin among CNF1-producing Escherichia coli strains from cattle with septicaemia and diarrhoea, FEMS Microbiol. Lett., 162, 235, 10.1111/j.1574-6968.1998.tb13004.x · DOI
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  9. Lam, T.J.G.M., 1996. Dynamics of bovine mastitis: a field study in low somatic cell count herds. Faculteit Diergeneeskunde, Universiteit Utrecht, Utrecht, pp. 147–171.
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  15. Nemeth, 1991, Serum resistance and the traT gene in bovine mastitis-causing Escherichia coli, Vet. Microbiol., 28, 343, 10.1016/0378-1135(91)90069-R · DOI
  16. Nemeth, 1994, In vitro comparison of bovine mastitis and faecal Escherichia coli isolates, Vet. Microbiol., 40, 231, 10.1016/0378-1135(94)90112-0 · DOI
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  23. Pyörälä, 1998, Efficacy of parenteral administration of three antimicrobial agents in treatment of clinical mastitis in lactating cows: 487 cases (1989–1995), J. Am. Vet. Med. Assoc., 212, 407, 10.2460/javma.1998.212.03.407 · DOI
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Metadata

Authors
Kaipainen, T., Pohjanvirta, T., Shpigel, N. Y., Shwimmer, A., Pyörälä, S., & Pelkonen, S.
Affiliations
  • University of Helsinki (FI)
  • Hebrew University of Jerusalem (IL)
Corresponding author
Kaipainen, T.
Venue
Veterinary Microbiology
Publisher
Elsevier BV
Published
2002-02
Volume
85
Issue
1
Pages
37-46
ISSN
0378-1135 (ISSN-L)
OpenAlex
W2078391941
Cited by
83
References
1
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 2 · 2022: 6 · 2021: 2 · 2020: 6 · 2019: 6 · 2018: 2 · 2017: 7 · 2016: 2 · 2015: 2 · 2014: 4 · 2013: 1 · 2012: 3
FWCI
1.88
Type
journal article
Language
en
Open access
closed
Locations
  • Veterinary Microbiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Valio
Topics
  • Life Sciences › Immunology and Microbiology › Microbiology › Escherichia coli research studies
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Milk Quality and Mastitis in Dairy Cows
  • Life Sciences › Immunology and Microbiology › Microbiology › Microbial infections and disease research
Keywords
Escherichia coli, bovine mastitis, virulence factors, coliform mastitis, traT, cytotoxic necrotizing factor 1, sFas, PAP, serum resistance, K1 capsule
MeSH terms
Pancreatitis-Associated Proteins, Animals, Bacterial Outer Membrane Proteins, Base Sequence, Blood Bactericidal Activity, Cattle, Escherichia coli, Finland, Genes, Bacterial, Israel, Mastitis, Bovine, Nephelometry and Turbidimetry, Virulence, Polymerase Chain Reaction, Bacterial Capsules, DNA Primers, Escherichia coli Proteins

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