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Cited by 96Milk Quality and Mastitis in Dairy CowsMicrobial infections and disease researchGenetic and phenotypic traits in livestock

Gram-negative bacterial infections of the mammary gland in cows

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Todhunter, Deborah A., Smith, K. Larry, Hogan, Joseph S., Schoenberger, Pamela S.·1991·American Journal of Veterinary Research
DOI 10.2460/ajvr.1991.52.02.184
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Abstract

Naturally acquired gram-negative bacterial intramammary infections (n = 160) were studied in 99 cows over a 2-year period. Escherichia coli, Klebsiella spp, Serratia spp, Enterobacter spp, and unidentified gram-negative bacteria were isolated from 28.8, 39.4, 9.4, 5.0, and 11.2%, respectively, of infected mammary glands. A majority (61%) of intramammary infections were first detected during the nonlactating period. Gram-negative bacteria isolated during the first half of the nonlactating period were predominantly Klebsiella spp, Serratia spp, and Enterobacter spp. Onset of E coli intramammary infections was more prevalent during the second half of the nonlactating period and during the first 7 days of lactation. The majority (59%) of infections were less than 28 days in duration, but Klebsiella spp and Serratia spp infections were of significantly (P less than 0.05) greater duration than infections with E coli. The greatest percentage (47%) of gram-negative bacterial intramammary infections were first detected during the summer.

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Crossref · 10.2460/ajvr.1991.52.02.184

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18 of 18 references verified0 citation errors · 0 not checkable

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  • The average duration of E. coli intramammary infections during lactation is less than ten days.

    “The average duration of E. coli intramammary infections during lactation is less than ten days [59].”

    From Coliform mastitis (2003) · cites this paper as [59]

  • Escherichia coli infections present at calving and early lactation most often originate during the last two weeks of the dry period.

    “Escherichia coli infections present at calving and early lactation most often originate during the last two weeks of the dry period [59].”

    From Coliform mastitis (2003) · cites this paper as [59]

  • Rates of new infection and clinical mastitis are highest in summer months for confinement-housed cows.

    “Rates of new infection and clinical mastitis are highest in summer months for confinement-housed cows [59].”

    From Coliform mastitis (2003) · cites this paper as [59]

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Authors
Todhunter, D. A., Smith, K. L., Hogan, J. S., & Schoenberger, P. S.
Affiliations
The Ohio State University (US)
Venue
American Journal of Veterinary Research
Publisher
American Veterinary Medical Association (AVMA)
Published
1991-02-01
Volume
52
Issue
2
Pages
184-188
ISSN
0002-9645 (ISSN-L)
DOI
10.2460/ajvr.1991.52.02.184
OpenAlex
W2413606905
Cited by
96
References
18
Citations by year
2026: 1 · 2025: 2 · 2024: 5 · 2023: 2 · 2022: 3 · 2021: 1 · 2020: 2 · 2019: 7 · 2018: 3 · 2017: 3 · 2016: 1 · 2015: 2 · 2014: 3 · 2013: 5 · 2012: 4
FWCI
5.25
Type
journal article
Language
en
Open access
Locations
  • American Journal of Veterinary Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
U.S. Department of Agriculture
Topics
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Milk Quality and Mastitis in Dairy Cows
  • Life Sciences › Immunology and Microbiology › Microbiology › Microbial infections and disease research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and phenotypic traits in livestock
Keywords
gram-negative bacterial infection, intramammary infection, bovine mastitis, dairy cattle, Escherichia coli, Klebsiella, Serratia, Enterobacter, lactation, infection duration, seasonal variation, bacterial isolation
MeSH terms
Animals, Bacterial Infections, Cattle, Female, Gram-Negative Bacteria, Lactation, Mammary Glands, Animal, Mastitis, Bovine, Seasons, Time Factors

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