Abstract
This study demonstrates that most SJL/J mice inoculated intracerebrally (IC) with 1000 suckling mouse 50% mean lethal doses of Theiler's encephalomyelitis virus (TMEV) develop flaccid paralysis 10-21 days after infection when there is acute spinal cord gray matter involvement (early disease). Surviving mice later develop a distinctive chronic neurologic disorder which is associated with marked mononuclear cell infiltrates and active demyelination in spinal cord white matter (late disease). Moreover, about one-fourth of infected animals only develop signs of late disease which may begin after an incubation period as long as 2 and a half months. Affected mice are less active, incontinent, and have a waddling, spastic gait. Minimal stimulation induces prolonged extensor spasms of all limbs. These late-developing manifestations of chronic TMEV infection are progressive and clinical remissions have not been observed. The effect of persistent CNS infection on general development was monitored by weekly measurement of body weight; however, the growth of chronically-infected mice was found to parallel that of control animals.
Original language | English (US) |
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Pages (from-to) | 201-207 |
Number of pages | 7 |
Journal | Journal of the Neurological Sciences |
Volume | 30 |
Issue number | 1 |
DOIs | |
State | Published - Nov 1976 |
Externally published | Yes |
Funding
In the early 1930s Theiler (1934) reported the isolation of a virus from the central nervous systems (CNS) of mice that had developed spontaneous flaccid limb para- This study was supported by National Multiple Sclerosis Society grant RG 891-B-2 and grant 1 R01 NSI3011-01 from the National Institutes of Health. Send reprint requests to H.L.L., Department of Neurology Northwestern University Medical School, 303 East Chicago Avenue, Chicago, Illinois 60611.
ASJC Scopus subject areas
- Neurology
- Clinical Neurology