Ultrasound studies of the effects of certain poisonous plants on uterine function and fetal development in livestock

Article Abstract:

Several poisonous plants are teratogenic to animal fetuses. The study of their fetotoxic effects has been facilitated by the use of ultrasonographic imaging. Locoweed ingestion caused a sequence of changes in the placenta and fetus which frequently ended in abortion. Plants which contain piperidine and quinolizidine alkaloids causedmultiple congenital contracture-type skeletal malformations and cleft palate. The degree and duration of alkaloid-induced fetal immobilization correlated well with the severity of the malformations.

Methods, Abnormalities, Ultrasound imaging, Animals, Livestock, Poisonous plants

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Effects of Ponderosa pine needles during pregnancy: comparative studies with bison, cattle, goats, and sheep

Article Abstract:

A study was conducted to determine the effect of feeding Ponderosa pine needles on the incidence of abortion among ruminants. Results show that feeding pine needles causes abortion in ruminants especially in the later part of pregnancy and that the effect is heightened with advancing pregnancy stage, increasing dose and greater length of exposure to pine needles. It was also shown that buffalo and cattle were more susceptible to pine needles and that the pine needle diet does not affect fertility in bovine ruminants.

Health aspects, Food and nutrition, Ruminants

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Ponderosa pine needle-induced parturition in cattle

Article Abstract:

The mechanisms by which ingestion of ponderosa pine needles induce parturition in cattle are still unknown. This effect appears to be confined to pregnant cattle, as ingestion does not appear to affect other animals. The bark and new-growth branch tips appear to be more potent inducers or parturition and may be useful in identification of the toxic component. The use of a synthetic progesterone, melangesterol acetate, and a prostaglandin inhibitor, ketoprofen, could have potential prophylactic benefit.

Cattle, Abortion, Animal reproduction, Veterinary toxicology

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