Field trial to determine efficacy of an Escherichia coli J5 mastitis vaccine
Open accessAbstract
Efficacy of an Escherichia coli (O111:B4) J5 bacterin for preventing naturally occurring IMI and clinical mastitis was tested in a 2.5-yr field trial in a 225-cow commercial herd. Cows with odd-numbered identification were vaccinated, and cows with even-numbered identification served as unvaccinated controls for each lactation during the study. Immunizations were subcutaneous on the upper part of the rib cage just posterior to the scapula at drying off, 30 d after drying off, and at calving. Percentage of quarters infected at calving with Gram-negative bacteria did not differ between treatment groups. A total of 67% of Gram-negative bacterial IMI present at calving in control cows became clinical during the first 90 d of lactation compared with 20% in vaccinated cows. Rate of Gram-negative bacterial clinical mastitis was higher in control cows than in vaccinated cows during the first 90 d of lactation. Immunization with the E. coli J5 bacterin did not reduce level of Gram-negative bacterial IMI at calving but did reduce incidence of clinical mastitis.
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Data from field trials suggest that these vaccines also reduce clinical cases of mastitis caused by species in the genera Klebsiella, Pseudomonas, Serratia, and Proteus.
“Data from field trials suggest that these vaccines also reduce clinical cases of mastitis caused by species in the genera Klebsiella , Pseudomonas , Serratia , and Proteus [16, 28].”
From Coliform mastitis (2003) · cites this paper as [28]
The field-trial results report fewer clinical Gram-negative mastitis cases in vaccinated cows, supporting the general suggestion of protection. The results also identify Serratia, Pseudomonas, and Klebsiella among infections at calving, but do not report reduced clinical cases separately for those genera; no passage found mentions Proteus (searched: Proteus and genus-specific clinical cases). (LLM, conf=0.84)
Experimental — accuracy not yet measured66.7% of coliform intramammary infections in unvaccinated cows became clinical during early lactation compared to 20% in vaccinated cows.
“The most striking difference between vaccinated and nonvaccinated cows was that 66.7% of coliform intramammary infections in unvaccinated cows became clinical during early lactation compared to 20% in vaccinated cows [28].”
From Coliform mastitis (2003) · cites this paper as [28]
The results passage reports that 66.7% of Gram-negative intramammary infections at calving in unvaccinated cows became clinical during the first 90 days of lactation, compared with 20% in vaccinated cows. The percentages and timing match, but the paper applies them to Gram-negative infections, not specifically to the narrower coliform category; it also lists Pseudomonas among the organisms. (LLM, conf=0.84)
Experimental — accuracy not yet measuredThe rate of clinical mastitis caused by Gram-negative bacteria was 4 to 5-fold lower in vaccinated cows compared with controls in controlled field trials.
“Rate of clinical mastitis caused by Gram-negative bacteria was 4 to 5-fold lower in vaccinated cows compared with controls in controlled field trials [16, 28].”
From Coliform mastitis (2003) · cites this paper as [28]
Vaccination of cows with Escherichia coli (O111:B4) J5 bacterins during the dry period and at calving reduced the incidence of naturally occurring clinical coliform mastitis during early lactation.
“Vaccination of cows with Escherichia coli (0111:B4) J5 bacterins during the dry period and at calving reduced the incidence of naturally occurring clinical coliform mastitis during early lactation (2, 5).”
From Effects of an Escherichia coli J5 Vaccine on Mild Clinical Coliform Mastitis (1995) · cites this paper as [5]
Use of an E. coli J5 bacterin did not reduce incidence of IMI at calving, but immunization reduced the percentage of mammary quarters with Gram-negative bacterial IMI that displayed clinical signs.
“The use of an E. coli J5 bacterin did not reduce incidence of IMI at calving, but immunization reduced the percentage of mammary quarters with Gram-negative bacterial IMI that displayed clinical signs (5).”
From Effects of an Escherichia coli J5 Vaccine on Mild Clinical Coliform Mastitis (1995) · cites this paper as [5]
Coliforms that can metabolize the constituents of milk in the micro-environment of the gland can reach populations exceeding 10^8 colony-forming units per milliliter of milk.
“Coliforms that can metabolize the constituents of milk in the micro-environment of the gland can reach populations exceeding 10 8 colony-forming units per milliliter of milk [31].”
From Coliform mastitis (2003) · cites this paper as [31]
The Introduction discusses coliform intramammary infections, and the Milk samples section describes culturing milk to identify bacteria. Neither reports coliform growth from milk constituents or populations exceeding 10^8 colony-forming units per milliliter; searches for those terms and the numerical threshold found no supporting passage. (LLM, conf=0.76)
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Self-citation
- Authors
- Hogan, J. S., Smith, K. L., Todhunter, D. A., & Schoenberger, P. S.
- Affiliations
- The Ohio State University (US)
- Venue
- Journal of Dairy Science
- Publisher
- American Dairy Science Association
- Published
- 1992-01
- Volume
- 75
- Issue
- 1
- Pages
- 78-84
- ISSN
- 0022-0302 (ISSN-L)
- OpenAlex
- W1982759563
- Cited by
- 96
- References
- 17
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 2 · 2023: 4 · 2022: 4 · 2021: 3 · 2020: 7 · 2019: 2 · 2018: 1 · 2017: 4 · 2016: 2 · 2013: 2 · 2012: 3
- FWCI
- 10.92
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Journal of Dairy Science (publishedVersion)
- PubMed (publishedVersion)
- Funders
- 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
- Escherichia coli J5, bacterin, mastitis vaccines, intramammary infection, clinical mastitis, Gram-negative bacteria, dairy cattle, vaccine efficacy, field trials, subcutaneous immunization
- MeSH terms
- Animals, Bacterial Vaccines, Cattle, Escherichia coli, Escherichia coli Infections, Female, Labor, Obstetric, Lactation, Mastitis, Bovine, Parity, Pregnancy, Vaccination, Gram-Negative Bacterial Infections, Escherichia coli Vaccines
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