The Western type of equine encephalomyelitis virus can be passed as an hereditary infection in a tick of the family Ixodidae, Dermacentor andersoni Stiles. Under experimental conditions, this virus has been carried in this tick for two successive generations, possibly for a third, passing certainly once, and possibly twice, from the female through the eggs to the larvae. The virus-carrying larval, nymphal, and adult stages of this tick, furthermore, are capable of infecting susceptible hosts when they are permitted to feed on them.
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Copyright, 1941, by The Rockefeller Institute for Medical Research New York
1941
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