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Sreedharan, Jyothy, 2011. Relationship between Natural Antibody levels and Somatic Cell Count in Dairy Cattle. Second cycle, A2E. Uppsala: SLU, Dept. of Animal Breeding and Genetics

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Abstract

At present mastitis in dairy cattle is detected by using somatic cell count and various bacterial diagnostic tests. Still it is difficult to understand the exact health status of the animal by mere observation of the test results, since there maybe presence of sub-clinical cases. There are indications in other species like poultry that natural antibodies might be used as indicators for the identification of (more) disease resistant individuals (Wijga, 2009). The present study focuses on the relationship between the natural antibody titres collected at a single sampling moment and the somatic cell count later inn the lactation. If proven, natural antibodies can be used as indicators for the immune status of the animal. For the present research the preliminary analysis of the fixed effects were analysed using the SAS software and the genetic parameters were estimated using the ASReml software. The results from the analyses show that relationships between the NAb titres and SCS after the sampling moment exists, but with a trend expressing a positive correlated response. The study shows that the NAb levels do not show a protective effect on the animal as the cell counts later in the lactation increased when the NAb levels increased. Hence NAb titre measured in milk samples may not be useful as a tool against mastitis selection.

Main title:Relationship between Natural Antibody levels and Somatic Cell Count in Dairy Cattle
Authors:Sreedharan, Jyothy
Supervisor:Grandinson, Katja and Bovenhuis, Henk and van der Poel, Jan
Examiner:Strandberg, Erling
Series:Examensarbete / SLU, Institutionen för husdjursgenetik
Volume/Sequential designation:382
Year of Publication:2011
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:VM002 Animal Breeding and Genetics - Erasmus Mundus Master's Programme 120 HEC
Department:(VH) > Dept. of Animal Breeding and Genetics
Keywords:Mastitis, somatic cell score, Natural antibodies, relationship, heritability
URN:NBN:urn:nbn:se:slu:epsilon-s-1737
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-1737
Subjects:Animal genetics and breeding
Language:English
Deposited On:05 Oct 2012 14:10
Metadata Last Modified:05 Oct 2012 14:10

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