The reproductive lifespan of Onchocerca volvulus in West African savanna
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چکیده
منابع مشابه
The reproductive lifespan of Onchocerca volvulus in West African savanna.
The epidemiological model ONCHOSIM--a model and computer simulation program for the transmission and control of onchocerciasis--has been used to determine the range of plausible values for the reproductive lifespan of Onchocerca volvulus. Model predictions based on different lifespan quantifications were compared with the results of longitudinal skin-snip surveys undertaken in 4 reference villa...
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Simulium yahense black flies infected with microfilaria of Onchocerca volvulus were kept in a defined insectary environment in Liberia, West Africa. A daily sample of infected flies was dissected for larvae developing in the thoracic muscles and examined for growth in stadial development. Microfilariae ingested by black flies transformed to the L1 larval stage without molting. Successive larval...
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BACKGROUND The initial endemicity (pre-control prevalence) of onchocerciasis has been shown to be an important determinant of the feasibility of elimination by mass ivermectin distribution. We present the first geostatistical map of microfilarial prevalence in the former Onchocerciasis Control Programme in West Africa (OCP) before commencement of antivectorial and antiparasitic interventions. ...
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In an attempt to describe the changing population dynamics of Onchocerca volvulus during a period of vector control, nodulectomies were undertaken in 256 patients from ten villages in the Onchocerciasis Control Programme (OCP) and in 74 patients from two villages in an area with ongoing transmission. A total of 1198 nodules were excised and 4350 adult worms were isolated and examined for viabil...
متن کاملAcute sigmoid volvulus in a West African population.
BACKGROUND Acute sigmoid volvulus is one of the commonest causes of benign large bowel obstruction. Its incidence varies considerably from one geographic area to another. OBJECTIVE To review the management of acute sigmoid volvulus in a relatively high prevalence area. METHODS All adult patients with acute sigmoid volvulus seen at the Royal Victoria Teaching Hospital (RVTH) Banjul, between ...
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ژورنال
عنوان ژورنال: Acta Tropica
سال: 1991
ISSN: 0001-706X
DOI: 10.1016/0001-706x(91)90015-c