ZYGOPHALLACEOUS POISONING MOTOR NEURON DISEASE IN CATTLE AND SHEEP
 
Description    Ingestion of plants belonging to 3 genera of the family ZYGOPHYLLACEAE has been associated with clinical signs of motor neuron disease in cattle and/or sheep. Plants involved include PEGANUM HARMALA (African rue), P. MEXICANUM (Mexican rue), TRIBULUS TERRESTRIS (cat-head), T. MICROCOCCUS (yellow vine), KALLSTROEMIA HIRSUTISSIMA (hairy caltrop), K. PARVIFLORA (warty caltrop).
 
Species   Bovine, Ovine
 
Signs   Abnormal forelimb reflexes, Abnormal hindlimb reflexes, Abnormal proprioceptive positioning, Ataxia, Circling, Dullness, Dysmetria, Exercise intolerance, Forelimb atrophy, Forelimb weakness, Generalized weakness, Hemiparesis, Hindlimb atrophy, Inability to stand, Muscle hypotonia, Paraparesis, Pelvic atrophy, Reluctant to move, Seizures or syncope, Stiffness or extended neck, Tetraparesis, Trembling, Tremor, Underweight, poor condition, thin, emaciated, unthriftiness, ill thrift, Weakness of one hindlimb, Weight loss
 
References   Bourke CA. Motor neurone disease in molybdenum-deficient sheep fed the endogenous purine xanthosine: possible mechanism for Tribulus staggers. Aust Vet J 2012;90:272 [Web Reference]
Finnie J. Neurological diseases of ruminant livestock in Australia. II: toxic disorders and nutritional deficiencies. Aust Vet J 2011;89:247 [Web Reference]
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