title: Haptoglobin and serum amyloid A in milk and serum during acute and chronic experimentally induced Staphylococcus aureus mastitis.
abstract: Local and systemic changes in the acute phase proteins, haptoglobin and serum amyloid A (SAA), were studied in six dairy cows during the acute and chronic phases of experimentally induced Staphylococcus aureus mastitis. Haptoglobin and SAA were measured in serum, and in milk from infected and healthy control udder quarters within each cow. Concentrations of haptoglobin and SAA increased rapidly in both serum and milk during the acute phase of mastitis and followed a similar pattern. Significantly raised milk concentrations of SAA were also found during chronic subclinical mastitis. Serum concentrations of SAA also tended to be higher during the chronic phase than pre-infection. Increases in milk haptoglobin and SAA were specific for the infected udder quarters. In conclusion, measurement of SAA in milk samples could be a useful tool in diagnosing mastitis.
authors.affiliation: Department of Obstetrics and Gynaecology, Swedish University of Agricultural Sciences, Faculty of Veterinary Medicine, Uppsala, Sweden.
authors.forename: Ulrika
authors.initials: U
authors.lastname: Grönlund
authors.forename: Cecilia
authors.initials: C
authors.lastname: Hultén
authors.forename: Peter D
authors.initials: PD
authors.lastname: Eckersall
authors.forename: Caroline
authors.initials: C
authors.lastname: Hogarth
authors.forename: Karin
authors.initials: K
authors.lastname: Persson Waller
mesh_terms: D000208:Acute Disease; D000818:Animals; D001053:Apolipoproteins / Q000032:analysis*; D002417:Cattle; D002908:Chronic Disease; D005260:Female; D006242:Haptoglobins / Q000032:analysis*; D008414:Mastitis, Bovine / Q000097:blood / Q000175:diagnosis*; D008892:Milk / Q000737:chemistry*; D000685:Serum Amyloid A Protein / Q000032:analysis*; D013203:Staphylococcal Infections / Q000097:blood / Q000175:diagnosis / Q000662:veterinary*; D013211:Staphylococcus aureus / Q000276:immunology
chemical_list: D001053:Apolipoproteins; D006242:Haptoglobins; D000685:Serum Amyloid A Protein