Influence of mastitis on electrophoretic fractions of colostrum from Holstein cows
Influência da mastite nas frações eletroforéticas do colostro de vacas da raça Holandesa1
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The aim of this study was to evaluate the protein fractions in colostral secretions of cows affected by mastitis immediately after calving. Therefore, 30 Holstein cows were divided into three groups: Group I (GI) composed of ten multiparous cows calving without mastitis; Group II (GII) composed of ten multiparous cows calving with subclinical mastitis, and Group III (GIII) composed of ten multiparous cows calving with mastitis. The concentration of immunoglobulin A (IgA), lactoferrin (LF), albumin, immunoglobulin G (IgG), β-lactoglobulin (β-Lg) and α-lactoalbumin (α-La) was determined by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE). It was found that the IgG, LF and albumin vary among glands of subclinical and clinical mastitis and healthy and that the presence of a bacteria in the mammary gland was the key role for changing of the pattern of serum protein source.
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