Abstract
Summary
1. Okinawan horses, goats, pigs, ducks, and chickens were inoculated intravenously with the virus of Japanese B encephalitis in order to obtain additional data regarding their role as natural reservoirs of disease.
2. Virus was recovered from the blood of pigs and ducks 24 hours after intravenous inoculation and was probably present for a longer period in chickens.
3. Two of 3 inoculated pigs died with characteristic signs of encephalitis while the third recovered after a long illness of a similar nature. Virus was not recovered from the brains of the animals which died. The other species showed no clinical evidence of infection.
4. Complement-fixing antibodies in experimental animals rapidly reached high levels, whereas neutralizing antibody levels rose more slowly.
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