Stuart L D, James L F, Panter K E, Call J W, Short R E
Colorado Veterinary Laboratory, Broomfield 80020.
Cornell Vet. 1989 Jan;79(1):61-9.
Grazing of ponderosa pine needles by pregnant cows may cause abortion. The abortions are frequently accompanied by retained placenta. Death is not uncommon in cows that abort. Ten cows were placed on a ponderosa pine needle experiment. Six of these cows were fed pine needles and four served as controls. All six cows receiving pine needles aborted, and three of them died shortly after the abortion. Death was due to a severe septicemia. Although the cows were necropsied shortly after death, all tissues were necrotic. Other lesions are described. Three of the six calves died shortly after the abortion. The other three were small and weak but survived due to intensive care.
怀孕母牛啃食黄松针叶可能会导致流产。流产时常伴有胎盘滞留。流产的母牛死亡并不罕见。十头母牛被用于黄松针叶实验。其中六头母牛喂食了松针，四头作为对照。所有六头食用松针的母牛都流产了，其中三头在流产后不久死亡。死亡原因是严重败血症。尽管母牛在死后不久就进行了尸检，但所有组织都已坏死。还描述了其他病变。六头小牛中有三头在流产后不久死亡。另外三头小牛体型小且虚弱，但由于精心照料而存活下来。
