Abstract
The impact of ten diseases of dairy cattle on milk production, calving interval and culling were studied in a university operated dairy herd. Cows with clinical mastitis, ketosis or displaced abomasum had lowered milk production. Cows with metritis, retained placenta, cystic graafian follicles or ovarian hypofunction had longer calving intervals. Cows with clinical mastitis, metritis, pneumonia or retained placenta had increased risks of culling.
The relationship between disease and culling was based on the medical history of culled and nonculled cows using a case control approach. Therefore, it is likely that in many cases, the association between disease and culling is due to the impact of that disease on productivity.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Cote J. F., Curtis R. A., McSherry B. J., Robertson J. M., Kronfeld D. S. Bovine ketosis: frequency of clinical signs, complications and alterations in blood ketones, glucose and free fatty acids. Can Vet J. 1969 Jul;10(7):179–187. [PMC free article] [PubMed] [Google Scholar]
- Cote J. F. Herd Health Practice. Can Vet J. 1963 Jul;4(7):181–184. [PMC free article] [PubMed] [Google Scholar]
- Johnson A. D., Legates J. E., Ulberg L. C. Relationship between follicular cysts and milk production in dairy cattle. J Dairy Sci. 1966 Jul;49(7):865–868. doi: 10.3168/jds.S0022-0302(66)87960-2. [DOI] [PubMed] [Google Scholar]
- Martin S. W., Kirby K. L., Curtis R. A. Left abomasal displacement in dairy cows: its relationship to production. Can Vet J. 1978 Sep;19(9):250–253. [PMC free article] [PubMed] [Google Scholar]
- Natzke R. P., Everett R. W., Guthrie R. S., Keown J. F., Meek A. M., Merrill W. G., Roberts S. J., Schmidt G. H. Mastitis control program: effect on milk production. J Dairy Sci. 1972 Sep;55(9):1256–1260. doi: 10.3168/jds.S0022-0302(72)85658-3. [DOI] [PubMed] [Google Scholar]