Endemic onchocerciasis on the Jarawa valley area of Plateau state, Nigeria.

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  • NWOKE BERTRAM E. B.
    Medical Entomology & Parasitology Unit, School of Biological Science, Imo State University
  • ONWULIRI CELESTINE O. E.
    Department of Zoology, Faculty of Natural Science, University of Jos
  • SHIWAKU KUNINORI
    Department of Parasitology, Aichi Medical University Department of Environmental Medicine, Shimane Medical University
  • UFOMADU GAD O.
    Nigerian Institute for Trypanosomiasis Research
  • TADA ISAO
    Department of Parasitic Diseases, Kumamoto University Medical School
  • TAKAHASHI HIROSHI
    The Japan International Cooperation Agency, University of Jos

Bibliographic Information

Other Title
  • ナイジェリア, プラトー州ジャラワ渓谷におけるオンコセルカ症の流行状況

Description

Clinical and parasitological survey on onchocerciasis was carried out in the Jarawa Valley area of Nigeria. A total of 1, 821 inhabitants from six villages were examined and 908 (49.9%) were positive for microfilaria of Onchocerca volvulus. Onchocercal infection increased with age, reaching the highest level in adults over 40 years old. Pruritus was the most frequent lesion, followed by skin depigmentaion, visual impairment, nodule, hanging groin and elephantiasis. Leopard skin occurred in various parts of the body including areas not exposed to blackfly-bites. Lymphatic manifestation, hanging groin and elephantiasis, occurred mostly in old male subjects. The adult had the highest prevalence of nodules mainly in the pelvic regions. Skin biopsies taken from the iliac crest gave the highest frequency of positive skin snip.

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