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Mermithid (Nematoda: Mermithidae) parasitism of Simulium damnosum s.l. (Diptera: Simuliidae) in Sierra Leone and the need for vector control
- Harkrider, J.R., Gbakima, A.A., Kandeh, J.B., Sahr, F.
- Journal of medical entomology 1991 v.28 no.3 pp. 421-423
- Simulium damnosum, disease vectors, onchocerciasis, biological control, Mermithidae, ivermectin, parasites, Western Africa
- Females of Simulium damnosum Theobald s.l. were systematically collected at four sites in the Gorawa Chiefdom of Sierra Leone, West Africa, over a period of 15 mo from July 1986 to September 1987. The prevalence of mermithids infecting parous females varied from 0 to 7.9%, whereas the prevalence of mermithids in nulliparous females varied from 0 to 42.8%. The peak incidences of mermithid infection in nulliparous females occurred during the rainy season (15.2% in October 1986, 42.8% in August 1987). The high incidence of mermithids was associated with a high monthly biting rate, particularly during the month before the peak mermithid period (5,240 in September 1986, 4,878 in July 1987).