Haptoglobin and serum amyloid

(2009) Haptoglobin and serum amyloid A in bulk tank milk in relationto raw milk quality. Access to the published version may require journal subscription. Summary 25 The aim of the present study was to evaluate relationships between the presence of the 26 two major bovine acute phase proteins haptoglobin (Hp) and serum amyloid A (SAA) 27 and raw milk quality parameters in bulk tank milk samples. Hp and SAA have been 28 suggested as specific markers of mastitis but recently also as markers for raw milk 29 quality. Since mastitis has detrimental effects on milk quality, it is important to 30 investigate if the presence of Hp or SAA indicates such changes in the composition 31 and properties of the milk. Bulk tank milk samples (n=91) were analysed for Hp, 32 SAA, total protein, casein, whey protein, proteolysis, fat, lactose, somatic cell count 33 and coagulating properties. Samples with detectable levels of Hp had lower casein 34 content, casein number and lactose content, but higher proteolysis than samples 35