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Activities of the Trinidad Regional Virus Laboratory in 1953 and 1954 with Special Reference to the Yellow Fever Outbreak in Trinidad, B.W.I.¹

Serological surveys of Trinidad residents by the Trinidad Regional Virus Laboratory demonstrated yellow fever immunes in eight individuals 15–19 years of age, and in a high proportion of older individuals. Yellow fever virus was isolated from a human case in April 1954. Subsequently virus isolations have been made from 13 other human cases, 7 red howler (Alouatta) monkeys which were brought in dead, 21 pools of Haemagogus mosquitoes, and 1 pool of mixed mosquitoes—a total of 43 virus isolations. Yellow fever virus was repeatedly recovered from Haemagogus mosquitoes captured at ground level.

¹ The studies and observations on which this paper is based were conducted with the support and under the auspices of the Government of Trinidad and Tobago, the Colonial Development and Welfare Scheme, and The Rockefeller Foundation.

² Staff members, The Rockefeller Foundation Virus Laboratories.