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Am. J. Trop. Med. Hyg., 38(1), 1988, pp. 142-152
Copyright © 1988 by The American Society of Tropical Medicine and Hygiene

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Biting Activity of Black Flies in Guatemala: Parity Rates and Differences between Localities and Habitats

Charles H. Porter AND Richard C. Collins
Medical Entomology Research and Training Unit/Guatemala and Division of Parasitic Diseases, Center for Infectious Diseases, Centers for Disease Control, Public Health Service, U.S. Department of Health and Human Services, Atlanta, Georgia 30333

Host-seeking activity of anthropophilic black flies at 4 localities in Guatemala with different prevalence rates of onchocerciasis was assessed using human attractants and semimonthly catches over one year. Density of host-seeking Simulium ochraceum was greatest at the locality with the highest incidence of onchocerciasis and very reduced at the 2 localities with low levels of human infection. The overall percentage of parous host-seeking S. ochraceum at the 4 localities ranged from 41%–49%. Host-seeking activity appeared to be concentrated near streams containing immature stages, and few females dispersed as far as 3 km away. S. metallicum was the second most frequently captured species; however, at the locality with the highest prevalence of onchocerciasis, its host-seeking density was much less than that of S. ochraceum. For S. metallicum, the overall percentage of parous females ranged from 28%–34% at the 4 localities. S. metallicum were consistently taken in much greater numbers in coffee cultivation areas than in housing areas. Host-seeking S. callidum and S. gonzalezi also were captured.

Accepted for publication July 21, 1987.




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K. A. Lindblade, M. Richards, J. Richards, R. J. Gonzalez, N. Cruz-Ortiz, G. Zea-Flores, A. L. Morales, M. Sauerbrey, J. Castro, E. Catu, et al.
Exposure of Seasonal Migrant Workers to Onchocerca volvulus on Coffee Plantations in Guatemala
Am J Trop Med Hyg, September 1, 2009; 81(3): 438 - 442.
[Abstract] [Full Text] [PDF]


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Copyright © 1988 by the American Society of Tropical Medicine and Hygiene.