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August 14, 1915


JAMA. 1915;LXV(7):626-627. doi:10.1001/jama.1915.02580070060021

Our domestic animals are exposed to a variety of noxious agencies usually only of indirect interest to physicians. Unless the harmful factors represent sources of infection to man, they do not concern the medical world further than to indicate possible hindrances to the expected supply of food and clothing which are derived from animal sources. Sometimes the scientific problems involved deserve attention, quite aside from the practical aspects of the subject.

The zygadenus is a poisonous plant abundant on many of the stock ranges of the West, and is one of the most important sources of loss to sheepmen. Apparently all species of zygadenus are poisonous. The plants are poisonous through the whole season of their growth, but the tops are somewhat more poisonous at the time of flowering. The toxicity of the bulbs and tops is about the same, while the seeds are much more toxic than other parts