Nicholson S S, Olcott B M, Usenik E A, Casey H W, Brown C C, Urbatsch L E, Turnquist S E, Moore S C
Louisiana Cooperative Extension Service, Baton Rouge.
J Am Vet Med Assoc. 1989 Aug 1;195(3):345-6.
A phalaris grass (Phalaris caroliniana) caused neurologic signs and lesions in cattle and sheep. The sheep were hyperexcitable and uncoordinated, with severe muscle twitching, stiff gait, and head nodding. The cattle were thin, nervous, and ataxic. One feature of chronic phalaris toxicosis in these cases was onset of signs weeks or months after removal of the animals from the forage.
一种虉草（卡罗来纳虉草）致使牛和羊出现神经症状及病变。羊表现为过度兴奋且不协调，伴有严重的肌肉抽搐、步态僵硬和点头症状。牛则消瘦、紧张且共济失调。这些病例中慢性虉草中毒的一个特征是，动物从该草料中移除数周或数月后才出现症状。
