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Observations on the morphology of adults and larval stages of Oesophagostomum sp. isolated from man in northern Togo and Ghana

Published online by Cambridge University Press:  05 June 2009

J. Blotkamp ,
H. P. Krepel ,
V. Kumar ,
S. Baeta ,
J. M. Van't Noordende  and
A. M. Polderman
J. Blotkamp
Affiliation:
Laboratory of Parasitology, University of Leiden, P.O. Box 9605, 2300 RC Leiden, The Netherlands
H. P. Krepel
Affiliation:
Ministry of Health, Lomé, Togo
V. Kumar
Affiliation:
Institute for Tropical Medicine, Antwerp, Belgium
S. Baeta
Affiliation:
Ministry of Health, Lomé, Togo
J. M. Van't Noordende
Affiliation:
Department of Electron Microscopy, University of Leiden
A. M. Polderman
Affiliation:
Laboratory of Parasitology, University of Leiden, P.O. Box 9605, 2300 RC Leiden, The Netherlands
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Abstract

Infection with Oesophagostomum sp. appears to be extremely common in man in northern Togo and Ghana Adult specimens were recovered from the intestinal lumen by treatment with pyrantel pamoate and the morphological characteristics of oesophagostomes of man could for the first time be compared with information available on the morphology of oesophagostomes of monkeys. The observations and measurements demonstrated that the species involved is Oesophagostomum bifurcum and that the eggs of this species cannot be differentiated from those of Necator americanus. Both infections occur simultaneously in the population involved. The L1 larvae, too, cannot be differentiated from hookworm L1 larvae. The L3 however, are characteristic. Diagnoses of human Oesophagostomum infections is based on the detection of these larvae in coprocultures. In the present paper, the eggs, the L1 and L3 larval stages and the adults, carefully described and photos are given.

Keywords

Oesophagostomum bifurcummorphologymanTogoGhanaNematoda
Type
Research Papers
Information
Journal of Helminthology , Volume 67 , Issue 1 , March 1993 , pp. 49 - 61
Copyright
Copyright © Cambridge University Press 1993

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