Abstract
Summary
1. A uniformly fatal encephalitis develops in 7-day-old rats following either intracerebral injection or intranasal instillation of epidemic keratoconjunctivitis virus. 2. Most of the 12-day-old rats tested were found to be susceptible to infection with epidemic keratoconjunctivitis virus but were not uniformly so since some animals in this age group survived. 3. Rats 3 to 4 weeks of age as well as rats 7 to 8 weeks of age apparently are refractory to epidemic keratoconjunctivitis virus since they did not develop a clinically apparent infection following intracerebral injection of the virus.
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