Culling of dairy cows. Part I. Effects of diseases on culling in Finnish Ayrshire cows

Preventive Veterinary Medicine

Volumn 41, Issue 2-3, 1999, Pages 195-208

  Rajala Schultz, P J ^a   Grohn Y T ^a  

^a Section of Epidemiology   (United States)

Author keywords

Cattle management; Culling; Survival analysis; Time dependent covariates

Indexed keywords

ANIMAL; ANIMAL DISEASE; ANIMAL HUSBANDRY; ARTICLE; CATTLE; CATTLE DISEASE; DAIRYING; EUTHANASIA; FEMALE; PARITY; PREVALENCE; PROPORTIONAL HAZARDS MODEL;

ANIMAL HUSBANDRY; ANIMALS; CATTLE; CATTLE DISEASES; DAIRYING; EUTHANASIA; FEMALE; PARITY; PREVALENCE; PROPORTIONAL HAZARDS MODELS;

ANIMALIA; BOS TAURUS;

EID: 0344004868     PISSN: 01675877     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0167-5877(99)00046-X     Document Type: Article

References (18)

1. Beaudeau F., Ducrocq V., Fourichon C., Seegers H. Effect of disease on length of productive life of French Holstein dairy cows assessed by survival analysis. J. Dairy Sci. 78:1995;103-117.
2. Beaudeau F., Frankema K., Fourichon C., Seegers H., Faye B., Noordhuisen J.P.T.M. Associations between health disorders of French dairy cows and early and late culling within lactation. Prev. Vet. Med. 19:1994;213-231.
3. Beaudeau F., Henken A., Fourichon C., Frankena K., Seegers H. Associations between health disorders and culling of dairy cows: a review. Livestock Prod. Sci. 35:1993;213-236.
4. Cobo-Abreu R., Martin S.W., Stone J.B., Willoughby R.A. Associations between disease, production and culling in a university dairy herd. Can. Vet. J. 20:1979;191-195.
5. Cox, D., 1972. Regression models and life tables. J. R. Stat. Soc. Series B 187-202.
6. Dohoo I.R., Martin S.W. Disease, production and culling in Holstein-Friesian cows. V. Survivorship. Prev. Vet. Med. 2:1984;771-784.
7. Dohoo I.R., Martin S.W., Meek A.H., Sandals W.C.D. Disease, production and culling in Holstein-Friesian cows III. Disease and production as determinants of disease. Prev. Vet. Med. 2:1984;671-690.
8. Ducrocq, V., Sölkner, J., 1994. The Survival Kit, a FORTRAN package for the analysis of survival data. Guelph, Department Animal Poultry Science, University of Guelph. 22, pp. 51-52.
9. Ducrocq, V.P., 1987. An analysis of the length of productive life in dairy cattle. Department of Animal Science, Cornell University, Ithaca, USA.
10. Erb H.N., Smith R.D., Oltenacu P.A., Guard C.L., Hillman R.B., Powers P.A., Smith M.C., White M.E. Path model of reproductive disorders and performance, milk fever, mastitis, milk yield, and culling in Holstein cows. J. Dairy Sci. 68:1985;3337-3349.
11. Fetrow, J., 1988. Culling of dairy cows. 20th annual meeting of AABP, Phoenix, Arizona, AABP.
12. Gröhn Y., Saloniemi H., Syväjärvi J. An epidemiological and genetic study on registered diseases in Finnish Ayrshire cattle. I. The data, disease occurrence and culling. Acta Vet. Scand. 27:1986;182-195.
13. Gröhn Y.T., Ducrocq V., Hertl J.A. Modeling the effect of a disease on risk of culling: an illustration of the use of time-dependent covariates for survival analysis. J. Dairy Sci. 80:1997;1755-1766.
14. Gröhn Y.T., Eicker S.W., Ducrocq V., Hertl J.A. Effect of diseases on culling in New York State Holstein Dairy Cows. J. Dairy Sci. 81:1998;966-978.
15. Martin S.W., Aziz S.A., Sandals W.C.D., Curtis R.A. The association between clinical disease, production and culling in Holstein-Friesian cows. Can. J. Anim. Sci. 62:1982;633-640.
16. Milian-Suazo F., Erb H.N., Smith R.D. Risk factors for reason-specific culling of dairy cows. Prev. Vet. Med. 7:1989;19-29.
17. Rajala P.J., Gröhn Y.T. Disease occurrence and risk factors analysis in Finnish Ayrshire cows. Acta Vet. Scand. 39:1998;1-13.
18. Rothman, K.J., 1986. Modern Epidemiology. Little, Brown and Company, Boston.