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Cited by 61Milk Quality and Mastitis in Dairy CowsEscherichia coli research studiesMicrobial infections and disease research

The DOI matches its Crossref record; 27 of the 27 references it cites were found in a registry or an index.

Mastitis-Causing Escherichia coli: Serum Sensitivity and Susceptibility to Selected Antibacterials in Milk

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Fang, W., Pyörälä, S.·1996·Journal of Dairy Science
DOI 10.3168/jds.s0022-0302(96)76336-1
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Abstract

A total of 169 Escherichia coli strains were isolated from cows with cases of clinical mastitis.{3-Glucuronidase production, serum sensitivity, and susceptibility to selected antibacterials were analyzed using the fluorometric {3-glucuronidase assay.About 89% (150 of 169) of the isolates tested positive for {3glucuronidase.Of these isolates producing {3glucuronidase, 102 (68%) were resistant or moderately resistant to bovine serum.The antibacterial susceptibility of 96 isolates was tested in broth and milk.There was a significant shift from lower fluorometric minimum inhibitory concentration for tetracycline, sulfadoxin-trimethoprim, enrofloxacin, and gentamicin in broth to higher fluorometric minimum inhibitory concentration in milk.Serum sensitivity and susceptibility to tested antibacterials in broth or in milk were not related.Gentamicin and sulfadoxintrimethoprim seemed to be more potent in mastitic milk than in normal milk, suggesting a possible synergistic effect between these exogenous antibacterials and the indigenous antibacterial agents in mastitic milk.(Key words: Escherichia coli, (3-glucuronidase, antibacterial susceptibility, mastitis) Abbreviation key: FMIC =fluorometric MIC, ICoo = drug concentrations exhibiting 90% inhibition of fluorescence, ISB = Iso-Sensitest® broth, MIC = minimum inhibitory concentration, 4-MUG = 4-methylumbelliferyl-{3-D-glucuronide.

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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 [14]

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Metadata

Authors
Fang, W., & Pyörälä, S.
Affiliations
University of Helsinki (FI)
ORCID
Fang, W.
Venue
Journal of Dairy Science
Publisher
American Dairy Science Association
Published
1996-01
Volume
79
Issue
1
Pages
76-82
ISSN
0022-0302 (ISSN-L)
DOI
10.3168/jds.s0022-0302(96)76336-1
OpenAlex
W1981279375
Cited by
60
References
27
Citations by year
2025: 1 · 2022: 1 · 2021: 3 · 2020: 1 · 2019: 3 · 2017: 5 · 2016: 1 · 2015: 3 · 2014: 1 · 2013: 1 · 2012: 1
FWCI
3.94
Type
journal article
Language
en
Open access
Licence
Locations
  • Journal of Dairy Science (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Milk Quality and Mastitis in Dairy Cows
  • Life Sciences › Immunology and Microbiology › Microbiology › Escherichia coli research studies
  • Life Sciences › Immunology and Microbiology › Microbiology › Microbial infections and disease research
Keywords
bovine mastitis, Escherichia coli, beta-glucuronidase, serum sensitivity, antibacterial susceptibility, minimum inhibitory concentration, milk, tetracycline, enrofloxacin, gentamicin, synergistic antibacterial activity, dairy cattle
MeSH terms
Enrofloxacin, Ampicillin, Animals, Anti-Infective Agents, Anti-Bacterial Agents, Blood Bactericidal Activity, Cattle, Escherichia coli, Escherichia coli Infections, Female, Gentamicins, Glucuronidase, Mastitis, Bovine, Microbial Sensitivity Tests, Milk, Sulfadoxine, Tetracycline, Trimethoprim, Quinolones, Fluoroquinolones

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