Prevalence of the Yellow Fever Mosquito, Aedes Aegypti (Linn.), in Colombia

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  • International Health Board, 61 Broadway, New York


During the recent campaign against yellow fever in Colombia mosquito control measures were carried on at the more important centers and main key points of travel. Many other towns and villages in various parts of the country were also visited and inspected. This gave quite a complete survey of the distribution and prevalence of A. aegypti throughout the Republic.

A total of 56 places were investigated for mosquito breeding, at 18 of which control measures were established, preliminary inspections only being carried on at the other 38.

Mosquito breeding was found at 46 of the 56 places inspected. The highest house index was 96 per cent at Banco. The lowest was 6 per cent at Buenaventura. However, at this latter place control measures were being continued from a previous campaign. The lowest index found where no control measures had been carried on preceding our inspection was 13 per cent at Florida. The house indices of 45 of these places with breeding may be roughly grouped as follows: 8 were less than 25 per cent, 9 between 25 and 50 per cent, 18 between 50 and 75 per cent and 10 were more than 75 per cent. Four places, Banco, Villamizar, Cucuta and Quibdo, gave indices of more than 90 per cent. No index was obtained at Aracataca.

The accompanying map of Colombia will serve to illustrate the locations of the various places where these investigations were carried on.