[Nutritional factors and mammary inflammatory infection in the dairy cow. Ecopathological approach during the peripartum period].
The relationships between nutrition and udder inflammation/infection were studied in the dairy cow using an ecopathological approach. The study ('enquête écopathologique Bretagne') was performed over 4 yr in French herds with high-lactating cows. A long distribution time of Italian ryegrass silage and a low quantity of dietary cereal-based concentrates in the first 2 months of lactation was linked with low milk leukocyte counts, probably due to a high dietary energetic level or to a polyunsaturated fatty acid imbalance and a subsequent decrease in the synthesis of leukotriene LTB4. In the late gestation period, a long distribution time of fresh English rye-grass, which induced high uraemia and a larger distribution of vitamins A, D and E, was related to lower frequencies of major pathogens in the milk.
INRA-Theix, laboratoire d'écopathologie, Saint-Genès-Champanelle, France.
J
J
Barnouin
I
I
Aimo
J P
JP
Chacornac
M
M
Chassagne
B
B
Faye
F
F
Lescourret
D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001419:Bacteria / Q000254:growth & development; D002417:Cattle; D002149:Energy Intake; D005231:Fatty Acids, Unsaturated / Q000378:metabolism; D005260:Female; D007958:Leukocyte Count / Q000662:veterinary; D007975:Leukotriene B4 / Q000096:biosynthesis; D008414:Mastitis, Bovine / Q000209:etiology*; D008892:Milk / Q000166:cytology / Q000382:microbiology; D014815:Vitamins / Q000008:administration & dosage
D005231:Fatty Acids, Unsaturated; D014815:Vitamins; D007975:Leukotriene B4
Facteurs nutritionnels et inflammation-infection mammaire chez la vache laitière. Approche écopathologique dans la période du peripartum.