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The surface ultrastructure of Bourgelatia diducta, a common nematode parasite of domestic pigs in India, was examined with a scanning electron microscope. The anterior end possesses an external corona radiata of 21 elements, 4 cephalic papillae and 2 lateral amphids. The bursa is formed by a longer dorsal and 2 shorter lateral lobes that incorporate a genital cone. The female tail bears a pair of...
The fine surface topography of Oesophagostomum columbianum and O. aspersum, the predominant nematode species of goats in India, has been studied by means of SEM. In O. columbianum the anterior end is bent like a hook; the cephalic vesicle is marked behind by a groove; the lateral alae are present throughout the anterior extremity thereby providing a dorsal curvature to the body; the external corona...
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