The mechanisms of persistence and of demyelination in Theiler's virus (TV)-induced chronic neurologic disease (a murine model for multiple sclerosis) are, as yet, disputed. We investigated the tropism and persistence of TV in brain cell culture to better understand the pathogenesis of this disease. Using anti-genic markers to identify specific cells in culture, we have demonstrated that TV infects, lytically, neurons and oligodendrocytes and persistently astrocytes and macrophages. These results suggest that host cell factors play a key role in the mechanism of demyelination and the persistence of TV in the nervous system.
In recent months, the COVID-19 pandemic has threatened the financial viability of pediatric ophthalmology practices. To measure the economic impact, the American Association of Pediatric Ophthalmology and Strabismus (AAPOS) Socio-economic Committee surveyed current US members at the peak of the COVID shutdown, in April 2020. With a robust response rate, the survey portrays that some pediatric ophthalmology practices are ominously strained, if not irreparably harmed.
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