This study examined the efficacy of the PortaSCCRTM milk test to estimate somatic cell count (SCC) and detect subclinical mastitis in sheep, and the effects of cell counting method, sampling day and udder health status on SCC and milk constituents. Study results indicate that the PortaSCCRTM milk test is an effective method for determining udder sides as either healthy or chronic/clinically infected. Somatic cell counts in log10 transformation show less variation than actual SCC and provide distinction among udder sides classified in Healthy, Healthy/Inflammaiton, Infection/Subclinical Mastitis or Chronic/Clinical Mastitis categories. Sampling day affected both SCC and milk constituents, indicating that testing at 24 h post-weaning is optimal for detecting ewes with udder health problems. Mastitis status affects concentrations of milk constituents; the percentages of milk protein and fat were greater with the presence of mastitis, while the concentration of lactose in the milk was lower for mastitic udder sides than for healthy udder sides.Quantification of mastitis in sheep. University of Nevada, Reno. M.S. Thesis. Menzies, P., and S.Z. Ramanoon. 2001. Mastitis of sheep and goats. Vet. Clin. North Am. Food Anim. Pract. 17:333-358. Merck Veterinary Manual. 9th ed. 2005.
|Title||:||Efficacy of the PortaSCC Milk Test to Estimate Somatic Cell Count (SCC) and Detect Subclinical Mastitis in Sheep, and the Effect of Cell Counting Method, Sampling Day, and Udder Health Status on SCC and Constituents in Sheep Milk|
|Publisher||:||ProQuest - 2007|