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Infections with Filaria bancrofti are supposed to have been introduced in Charleston, South Carolina, by a cargo of negro slaves from a filarial district on the West Coast of Africa. In the same manner the infection must have been materially increased if not actually introduced in the northern portions of South America, in Central America, and in the West Indian Islands. The existence of filarial infection in the West Indies was, according to Manson (1) first recognized by Demarquay. In later years Manson, also Daniels (2), have stated that such infections occur in all the West Indian Islands and in those portions of the Western mainland already mentioned, and Ashburn (3) has given evidence of the prevalence of the condition in one island by finding microfilaria in the bloods of 12 per cent of the mounted battalion of the Porto Rico Provisional Regiment.
Received January 17, 1922.
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