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Cited by 246Milk Quality and Mastitis in Dairy CowsMicrobial infections and disease researchAnimal health and immunology

Environmental Pathogens and Intramammary Infection During the Dry Period

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Larry Smith, K., Todhunter, D.A., Schoenberger, P.S.·1985·Journal of Dairy Science
DOI 10.3168/jds.s0022-0302(85)80838-9
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Abstract

Rate of coliform and streptococcal intramammary infection during the dry period was studied in 168 dry periods. Coliform infection rate was influenced by stage of dry period, parity, and season during which dry periods occurred. Effects of dry cow therapy, immunization, or induced inflammation on coliform infection rate were minimal. Coliform infections originating in the first 50% of the dry period and persisting to lactation were predominantly other than Escherichia coli, whereas the majority originating in the last 50% of the dry period and persisting to lactation were Escherichia coli. Duration of streptococcal infections was greater than coliform infections. Dry cow therapy reduced streptococcal infection rate, and the effect was exerted primarily during the first 25% of the dry period. Effects of parity and season were not significant and likely masked by the positive effects of dry cow therapy. Results support the contention that all quarters of all cows should be dry treated for maximum reduction of new streptococcal infection during the dry period. Results suggest that methods other than conventional dry cow therapy are required for control of coliform infection during the dry period and streptococcal infection during the latter half of the dry period.

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  • During the dry period, susceptibility to intramammary infections is greatest the two weeks after drying off and the two weeks prior to calving.

    “During the dry period, susceptibility to intramammary infections is greatest the two weeks after drying off and the two weeks prior to calving [56].”

    From Coliform mastitis (2003) · cites this paper as [56]

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Authors
Larry Smith, K., Todhunter, D. A., & Schoenberger, P. S.
Venue
Journal of Dairy Science
Publisher
American Dairy Science Association
Published
1985-02
Volume
68
Issue
2
Pages
402-417
ISSN
0022-0302 (ISSN-L)
DOI
10.3168/jds.s0022-0302(85)80838-9
OpenAlex
W1963700544
Cited by
246
References
36
Citations by year
2025: 3 · 2024: 2 · 2023: 4 · 2022: 6 · 2021: 2 · 2020: 8 · 2019: 6 · 2018: 3 · 2017: 6 · 2016: 3 · 2015: 6 · 2014: 5 · 2013: 12 · 2012: 8
FWCI
9.97
Type
journal article
Language
en
Open access
Licence
Locations
  • Journal of Dairy Science (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Agriculture
  • Ohio State University
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
  • Health Sciences › Veterinary › Small Animals › Animal health and immunology
Keywords
intramammary infection, dry period, streptococcal infection, Escherichia coli, dry cow therapy, parity, seasons, immunization, bovine mastitis, dairy cattle
MeSH terms
Animals, Cattle, Cell Count, Enterobacteriaceae Infections, Environmental Microbiology, Female, Mastitis, Bovine, Milk, Parity, Pregnancy, Pregnancy Complications, Infectious, Seasons, Streptococcal Infections, Vaccination

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