The onchocerciasis focus at Kinsuka/Kinshasa (Republic of Zaire) in 1985. I. Entomological aspect

MC Henry, SEO Meredith

    Research output: Contribution to journalA1: Web of Science-article

    Abstract

    The entomological aspect of the onchocerciasis focus at Kinsuka/Kinshasa has not been studied since vector control was carried out in 1948. As in 1940, larvae of Simulium damnosum s.l. are located in the arm of the Zaire River flowing between Mimosa Island and the Zairian bank. They are, however, scarce. Cytotaxonomic studies showed that the S. squamosum group was the only member of the S. damnosum complex present in the region of Kinshasa. Physico-chemical analysis of the water at breeding sites determined that S. squamosum larvae develop in neutral or acid water with a conductivity of less than 50 micronhos cm-1 and a low concentration of dissolved salts. Longitudinal study showed that the 'annual biting rate' (ABR) and the 'annual transmission potential' (ATP) fluctuate from 2406-5999 bites man-1 year-1 and from 120-236 infective larvae man-1 year-1 respectively. The low transmission rate at Kinsuka is mainly due to the low level of the biting population occurring during the main river rising. The increase in Kinsuka's population has reinforced this situation by 'diluting' the parasite in the human reservoir
    Original languageEnglish
    JournalAnnals of Tropical Medicine and Parasitology
    Volume84
    Issue number4
    Pages (from-to)369-379
    ISSN0003-4983
    Publication statusPublished - 1990

    Keywords

    • B780-tropical-medicine
    • Onchocerciasis
    • Helminthic diseases
    • Entomology
    • Simulium damnosum
    • Transmission
    • Congo-Kinshasa
    • Kinsuka
    • Africa-Central
    • Maps

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