nervous system
• motor neurons loss and concurrent microglial infiltration in the lumbar spinal anterior horn is induced in transgenic mice by intramuscular (IM) infection with Coxsackievirus A21 (CAV21)
• motor neuron loss is not observed in dorsal horn, thoracic and cervical spinal cord, brainstem or brain
• spinal cord damage is concentrated in the anterior horn gray matter ipsilateral to injection site
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behavior/neurological
abnormal gait
(
J:92607
)
• 3-4 days following IM infection with CAV21 transgenic mice develop abnormal gait; symptoms peak on day 7 and some animals recover function
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• 3-4 days following IM infection with CAV21 transgenic mice develop flaccid paralysis (drop-foot) of the injected limb; symptoms peak on day 7 and some animals recover function
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• 3-4 days following IM infection with CAV21 transgenic mice develop paresis of the injected limb; symptoms peak on day 7 and some animals recover function
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immune system
• viral titer is elevated in the spinal tissue of transgenic animals, but is negligible in controls following IM infection of CAV21
• poliomyelitis is induced by CAV21in transgenic mice, but is not observed in controls
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