title: Influence of mastitis on D-amino acid content of milk.
abstract: The California Mastitis Test was used as an indicator of mastitis in this study. Five cows were chosen for each of the five test scores (from 0 = healthy to 4 = severe mastitis). Milk samples were analyzed for free AA and free D-AA. The contents of free AA, free D-AA, and the ratio of free D-AA to free AA increased significantly as the California Mastitis Test score increased. The free D-AA content of foremilk (first milk jets) from healthy cows (test score = 0) was approximately five times that in samples drawn later from the same udders. Contents of free AA and free D-AA were highly associated with test score and udder inflammation. Very low concentrations of free D-AA are normal for raw milk. Higher concentrations of free D-AA could be attributed to inclusion of foremilk and milk from cows having subclinical mastitis in the bulk tank milk.
authors: Pannon Agricultural University Faculty of Animal Science, Kaposvar, Hungary.
authors: J
authors: J
authors: Csapó
authors: Z
authors: Z
authors: Csapó-Kiss
authors: J
authors: J
authors: Stefler
authors: T G
authors: TG
authors: Martin
authors: S
authors: S
authors: Némethy
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D000818:Animals; D002417:Cattle; D002851:Chromatography, High Pressure Liquid; D005260:Female; D008414:Mastitis, Bovine / Q000378:metabolism*; D008892:Milk / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D000596:Amino Acids