Changes in bovine milk secretion following intramammary infusions of Concanavalin A, oyster glycogen, or water

Effects of sterile intramammary infusion of Concanavalin A on milk secretion were contrasted with infusion of oyster glycogen or water. Twenty-four cows were infused intramammary with 100 mg Concanavalin A, oyster glycogen in 20 ml water, or with 20 ml water alone. Concentrations of lactose, somatic...

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Bibliographic Details
Published in:Journal of dairy science 1986-05, Vol.69 (5), p.1259-1269
Main Authors: Fox, L.K, Timms, L.L, Schultz, L.H
Format: Article
Language:English
Subjects:
Acetylglucosaminidase - analysis
ACTIVIDAD ENZIMATICA
ACTIVITE ENZYMATIQUE
AGUA
Animals
Cattle - physiology
COMPOSICION
COMPOSITION
Concanavalin A - pharmacology
COWS
EAU
ENZYMIC ACTIVITY
Female
GLANDE MAMMAIRE
GLANDULAS MAMARIAS
GLICOGENO
GLYCOGEN
Glycogen - pharmacology
GLYCOGENE
HUITRE
Immunoglobulin A, Secretory - analysis
Immunoglobulin G - analysis
IMMUNOGLOBULINE
IMMUNOGLOBULINS
INFECCIONES
INFECTION
INFLAMACION
INFLAMMATION
Infusions, Parenteral
INJECTION
INMUNOGLOBULINA
INYECCION
LACTACION
LACTATION
Lactation - drug effects
Lactose - analysis
LAIT
LECHE
MAMMARY GLANDS
Mammary Glands, Animal - drug effects
MAMMITE
MASTITIS
MILK
Milk - analysis
Milk - enzymology
MILK PRODUCTION
n-acetyl-b-d-glucosaminidase
OSTRA
OYSTERS
Pregnancy
PRODUCCION LECHERA
PRODUCTION LAITIERE
PROTEINAS
PROTEINE
PROTEINS
Serum Albumin - analysis
TERAPIA
THERAPEUTIQUE
THERAPY
VACA
VACHE
WATER
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Summary:Effects of sterile intramammary infusion of Concanavalin A on milk secretion were contrasted with infusion of oyster glycogen or water. Twenty-four cows were infused intramammary with 100 mg Concanavalin A, oyster glycogen in 20 ml water, or with 20 ml water alone. Concentrations of lactose, somatic cells, immunoglobulins G and A, serum albumin, and activity of N-acetyl-B-D-glucosaminidase were determined in milk. Blood N-acetyl-B-D-glucosaminidase activity and concentrations of blood immunoglobulins G and A and serum albumin were determined. Oyster glycogen and concanavalin A caused inflammation in treated quarters; peak elevations of milk somatic cell counts, serum albumin, immunoglobulin G concentrations, and N-acetyl-B-D-glucosaminidase activity were at 12 to 36 h following treatment. Milk production and lactose concentration were reduced by oyster glycogen and Concanavalin A. Selective indices of relative accumulation of milk immunoglobulins decreased following Concanavalin A and oyster glycogen, whereas the N-acetyl-B-D-glucosaminidase activity selective index generally remained unchanged. Inflammation reduced the selective accumulation of immunoglobulins, and absence of change in the N-acetyl-B-D-glucosaminidase selective index indicated that blood is not a major source of milk N-acetyl-B-D-glucosaminidase.
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(86)80532-X