Viruses in Ticks

III. Attempts to Transmit St. Louis Virus by Argas (Persicargas) Arboreus

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  • Department of Medical Zoology, United States Naval Medical Research Unit Number Three, Cairo, Egypt, U. A. R.

Summary

Infection of Argas (Persicargas) arboreus with the virus of St. Louis encephalitis (SLE) was attempted. Only a low proportion became infected and transmission by bite was not accomplished. Infection of nymphs and transstadial transmission of the virus by nymphs was shown once in 9 attempts. Transovarial transmission of the virus was not demonstrated.

Virus was retained in some infected females for at least 52 days, despite failure to transmit. The possibility that other bird-feeding ticks may serve as reservoirs of SLE virus is mentioned.

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