[Importance of estrogens and estrogen-active compounds for udder health in cattle. A review].
High oestrogen concentrations in blood or high intake of oestrogen-active compounds with forage can be associated with an enhanced occurrence of udder diseases. Mean somatic cell count (MSCC) can increase and milk yield can decrease. Subclinically infected udder quarters can develop clinical mastitis and the rate of new infections can be high. This review describes concentrations of oestrogens in peripheral blood plasma in cattle and occurrence of oestrogen-active compounds in forage. Relationships between oestrogens or oestrogen-active compounds and udder health are presented. The possible mechanisms of enhanced susceptibility of the udder to infection under the influence of oestrogens are discussed.
Zdunczyk
S
S
Klinik für Geburtshilfe und Pathologie der Reproduktion, Fakultät für Veterinärmedizin, Ermländisch-Masurische Universität Olsztyn, Polen.
Zerbe
H
H
Hoedemaker
M
M
D000821:Animal Feed; D000818:Animals; D002417:Cattle / Q000502:physiology*; D002452:Cell Count / Q000662:veterinary; D004967:Estrogens / Q000097:blood*; D005260:Female; D007529:Isoflavones / Q000008:administration & dosage*; D007774:Lactation; D008321:Mammary Glands, Animal / Q000382:microbiology / Q000502:physiology*; D008414:Mastitis, Bovine / Q000453:epidemiology; D008892:Milk / Q000166:cytology / Q000378:metabolism / Q000382:microbiology; D048789:Phytoestrogens; D028321:Plant Preparations / Q000008:administration & dosage*
D004967:Estrogens; D007529:Isoflavones; D048789:Phytoestrogens; D028321:Plant Preparations