Understanding Immune Responses to Digital Dermatitis in Cattle
Author Information
Author(s): Coatney John W., Krull Adam C., Gorden Patrick J., Shearer Jan, Humphrey Samuel, Olsen Steven, Plummer Paul J., Wilson-Welder Jennifer H.
Primary Institution: Iowa State University
Hypothesis
Development of digital dermatitis, followed by complete recovery, results in adaptive immune responses that prevent or decrease the likelihood of subsequent disease after re-infection.
Conclusion
Infection and recovery from digital dermatitis can provide partial protection against subsequent disease despite a lack of evidence for circulating antigen reactive lymphocytes.
Supporting Evidence
- All naïve calves developed lesions after initial infection.
- Only 5 of 8 calves developed lesions after a second experimental infection.
- Humoral and cellular responses did not differ significantly between treatment groups.
Takeaway
The study looked at how cows respond to a skin infection called digital dermatitis and found that getting the infection once might help them fight it off better if they get it again later.
Methodology
The study involved inducing digital dermatitis in two groups of calves and comparing their immune responses through serum antibody titers and lymphocyte proliferation analysis.
Potential Biases
Potential bias due to the controlled experimental conditions that may not represent real-world scenarios.
Limitations
The study's experimental conditions may not accurately reflect natural exposure and disease development, and the sample size was small.
Participant Demographics
Holstein dairy calves, approximately 250–425 pounds and 4–7 months of age.
Statistical Information
P-Value
0.20
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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