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Am. J. Trop. Med. Hyg., 6(1), 1957, pp. 145-152
Copyright © 1957 by The American Society of Tropical Medicine and Hygiene

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Forest Mosquitoes Associated with Sylvan Yellow Fever in Nicaragua

Pedro Galindo AND Harold Trapido1
Gorgas Memorial Laboratory, Panama, R. P.

The results are given of forest canopy mosquito surveys at three places in Nicaragua where there was evidence of sylvan yellow fever activity during 1952 and 1953. At these localities five species of Haemagogus were taken: spegazzinii falco, iridicolor, m. mesodentatus, equinus and anastasionis, the last named only on the Pacific slope, and the first three only on the Caribbean slope. H. iridicolor is also present on the Pacific slope in small numbers but was not in the collections made at the two fixed stations operated there. Also present and of interest as possible vectors were Aedes leucocelaenus clarki and Trichoprosopon magnus on the Caribbean side only, and Sabethes chloropterus on both the Caribbean and Pacific versants. On epidemiological grounds H. equinus appears to have been the vector on the Pacific side and H. iridicolor the principal vector on the Caribbean slope. The possible role of S. chloropterus, considered an important species in carrying virus over the dry season in Panama, could not be assessed as the Nicaraguan collections were made only in the rainy season. Also in doubt is the possible part played by Trichoprosopon magnus, the commonest arboreal mosquito at the Caribbean side stations, since its ability to transmit has not yet been determined. It is thought that the numbers of three species known to be vectors elsewhere, H. spegazzinii falco, H. m. mesodentatus and A. leucocelaenus clarki were too small for them to have been significantly involved in transmission.


1 Present address: The Rockefeller Foundation, 49 West 49th Street, New York, N. Y.






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Copyright © 1957 by the American Society of Tropical Medicine and Hygiene.