Abstract

Abstract Immatures often are identified after surgical removal of a nodule. Eggs are easily overlooked as they resemble hookworm eggs. Ternidens deminutus eggs are in fact larger, 70-94 by 40-60 /im. Oesophagostomum is diagnosed on cultured L3 (Blotkamp et al. 1993) which are 700-950 /rm (larger than Necator) with prominent intestinal cells and a long ‘hair-like’ tail to the transversely striated sheath. Adults are about 1 cm long: T. deminutus has a globose buccal capsule, mouth collar, and leaf crown (Goldsmid and Lyons 1973); Oesophagostomum a cylindrical buccal capsule, double leaf crown, cephalic vesicle, and distinct ventral groove. An IgG4 ELISA for Oesophagostomum is under experimental evaluation.

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