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Venezuelan Encephalitis Virus Infection in Neotropical Bats

III. Experimental Studies on Virus Excretion and Non-Arthropod Transmission^*

Charles Seymour AND Robert W. Dickerman

A total of 80 Neotropical bats of five species was inoculated with one of four strains of Venezuelan encephalitis (VE) virus. Virus was detected in the oropharynges of 56% of bats, and most regularly in Artibeus jamaicensis (75%). Titers of virus in oropharyngeal secretions were occasionally very high (8.5 log₁₀ SMicLD₅₀/ml in one A. jamaicensis). Only 2 of 123 urine samples from 50 bats and 2 of 86 fecal samples from 46 bats yielded VE virus. No contact or aerosol virus transmission from bat to bat was detected. VE virus passed transplacentally from two infected mothers to their fetuses, which were aborted. Virus did not pass from one infected mother to her nursing young.

Accepted for publication July 23, 1977.

^* This research was supported by USPHS Research Grant AI-11383 from NIAID.

Present address: Department of Veterinary Science, University of Wisconsin, Madison, Wisconsin 53706.