International Journal of Tropical Insect Science

, Volume 3, Issue 4, pp 275–279 | Cite as

Onchocerciasis in the Benue State of Nigeria—I. The Incidence, Breeding Sites and Infection Rates of Simulium Damnosum in the Kwande Local Government Area

  • E. I. Gemade
  • O. O. Dipeolu


Between 1979 and 1980, the incidence, breeding sites and infection rates of Simulium damnosum with Onchocerca volvulus were investigated on rivers Amire-u-Kiriki and Katsina Ala in a local government area of the Benue State of Nigeria, in West Africa. Several breeding sites were located along the rivers. All the Simulium caught were identified as S. damnosum, and a greater number was encountered during the rainy than the dry season. The numbers of infected and infective S. damnosum were ascertained through the dissection of the caught flies; the number of bites per day as well as the number of infective bites per person per day were estimated for each zone of investigation. It was concluded that the areas of investigation are highly endemic for human onchocerciasis, and the consequences of this on the people living in the area are discussed.

Key Words

Simulium damnosum Onchocerca volvulus infective bites per person per day 


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  1. Anderson R. C. (1956) The life cycle and seasonal transmission of Ornithofilaraia fallisensis Anderson, a parasite of domesticated and wild ducks. Can. J. Zool 34, 485.Google Scholar
  2. Barnley G. R. (1949) Onchocerciasis in Kigezi District, Uganda. E. Afr. Med. J. 26, 308–310.Google Scholar
  3. Blacklock D. B. (1926) The development of Onchocerca volvulus in Simulium damnosum. Ann. trop. Med. Parasit. 20, 1–48.CrossRefGoogle Scholar
  4. Bradley A. K. (1976) Effects of Onchocerciasis on settlement in middle Hawal valley. Nigeria Trans. R. Soc. Trop. Med. Hyg. 70, 225–229.CrossRefGoogle Scholar
  5. Crosskey R. W. (1954) Onchocerciasis in the Galma valley area, Northern Nigeria. West Afr. Med. J. 3, 75–79.PubMedGoogle Scholar
  6. Crosskey R. W. (1956) The distribution of Simulium damnsum Meobaled in Northern Nigeria. Trans. R Soc. trop. Med. Hyg. 50, 379–392.CrossRefGoogle Scholar
  7. Crosskey R. W. (1962) Observations on the uptake of human blood by Simulium damnosum; the engorgement time and size of blood meal. Ann. trop. Med. Parasit. 56, 141–148.CrossRefGoogle Scholar
  8. Crosskey R. W. and Crookey M. E. (1959) A quantitative survey of Onchocerciasis in persons under twenty years of age in an endemic area in Northern Nigeria. Ann. trop Med. Parasit. 53, 10–24.CrossRefGoogle Scholar
  9. Davies J. B., Crosskey R. W., Johnston M. R. L. and Crosskey M. E. (1968) The Simulium control scheme at Abuja Northern Nigeria and its effect on the prevalence of Onchocerciasis in the area. Bull. Wld. Hlth. Org. 39, 187–207.Google Scholar
  10. Gemade E. I. (1980) The role of Simulium in the spread of Onchocerciasis in Ikyou and Nanev clans in the Kwande Local Government area of Benue State, Nigeria. M. Sc. Thesis, University of Ibadan.Google Scholar
  11. Iloeje N. P. (1977) A New Geography of Nigeria. New Edition, 1972 Reprinted 1977. Fletcher & Sons Ltd., Norwich.Google Scholar
  12. McMahon J. P. (1967) A review of the control of Simulium vectors of Onchocerciasis. Bull. Wld. Hlth. Org. 37, 415–430.Google Scholar
  13. Mills A. R. (1965) Onchocerciasis in the northern province of Sierre Leone. Trans. R. Soc. trop. Med. Hyg. 59, 252.CrossRefGoogle Scholar
  14. Nelson G. S. and Pester F. R. N. (1962) The identification of infective filarial larvae in Simulliidae. Bull Wld. Hlth. Org. 27, 473–481.Google Scholar
  15. Sofoluwe G. O., Dipeolu O. O. and Ogunji F. O. (1977) Studies on Filariasis at the Nigerian Institute of Oil Palm Research (NIFOR). I The results of parasitological and entomological investigations Nig. J. Microb. 1, 52–58.Google Scholar
  16. Steward J. S. (1937) The occurrence of Onchocerca gutturosa Neumann in cattle in England, with an account of its life history and development in Simulium ornatum MG. Parasitology 29, 212–219.CrossRefGoogle Scholar
  17. Wyatt G. B. (1971) Onchocerciasis in Ibarapa, Western State, Nigeria. Ann. trop. Med. Parasit. 65, 513–523.CrossRefGoogle Scholar

Copyright information

© ICIPE 1982

Authors and Affiliations

  • E. I. Gemade
    • 1
  • O. O. Dipeolu
    • 1
  1. 1.Department of Veterinary Microbiology and ParasitologyUniversity of IbadanIbadanNigeria

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