Biomaterial Database

Electron microscopical studies on onchocerciasis. II. Skin and microfilariae after treatment with metrifonate. 1979

G D Burchard, and E J Albiez, and M Bierther

Skin snips of six patients with manifest onchocerciasis treated with a single dose of metrifonate (10 mg/kg) were examined by electron microscopy one, three, five and ten days after application of the drug. Compared to untreated cases 24 hours after treatment there is a marked increase in the extend of perivascular infiltrates which are composed not only of macrophages, lymphocytes and plasma cells, but also of eosinophils. Infiltrates directly around dead microfilariae are seen infrequently. This pattern of cellular reaction remains constant for the first ten days after treatment. Metrifonate obviously kills the microfilariae rapidly, already 24 hours after its application totally disintegrated parasites are to be found. On the other hand always a few intact microfilariae are seen, possibly they just hatched after treatment.

UI	MeSH Term	Description	Entries
D007988	Liberia	A republic in western Africa, south of GUINEA and east of COTE D'IVOIRE. Its capital is Monrovia.	Republic of Liberia
D008297	Male		Males
D008842	Microfilariae	The prelarval stage of Filarioidea found in the blood and tissues of mammals, birds and intermediate hosts (vector).	Microfilaria
D008854	Microscopy, Electron	Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen.	Electron Microscopy
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D009854	Onchocerca	A genus of parasitic nematodes whose organisms live and breed in skin and subcutaneous tissues. Onchocercal microfilariae may also be found in the urine, blood, or sputum.	Onchocercas
D009855	Onchocerciasis	Infection with nematodes of the genus ONCHOCERCA. Characteristics include the presence of firm subcutaneous nodules filled with adult worms, PRURITUS, and ocular lesions.	Onchocerciases
D002986	Clinical Trials as Topic	Works about pre-planned studies of the safety, efficacy, or optimum dosage schedule (if appropriate) of one or more diagnostic, therapeutic, or prophylactic drugs, devices, or techniques selected according to predetermined criteria of eligibility and observed for predefined evidence of favorable and unfavorable effects. This concept includes clinical trials conducted both in the U.S. and in other countries.	Clinical Trial as Topic
D004341	Drug Evaluation	Any process by which toxicity, metabolism, absorption, elimination, preferred route of administration, safe dosage range, etc., for a drug or group of drugs is determined through clinical assessment in humans or veterinary animals.	Evaluation Studies, Drug,Drug Evaluation Studies,Drug Evaluation Study,Drug Evaluations,Evaluation Study, Drug,Evaluation, Drug,Evaluations, Drug,Studies, Drug Evaluation,Study, Drug Evaluation
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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