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Ascaris lumbricoides Linne, 1758 and Ascaris suum Goeze, 1782: morphological differences between specimens obtained from man and pig



Ascaris lumbricoides Linne, 1758 and Ascaris suum Goeze, 1782: morphological differences between specimens obtained from man and pig



Southeast Asian Journal of Tropical Medicine and Public Health 4(1): 41-45



The denticles, cuticular striations, eggs and spicules of Ascaris from man and pig were compared. No differences were found between the width of the cuticular striations, and size of the egg, in worms from the 2 hosts. In worms from both hosts, denticle size varied directly with body-length. Denticles of pig Ascaris were mainly equilateral triangles with straight edges but some had convex or rounded edges; denticles of human Ascaris were smaller with concave edges, resembling small cones but some had straight edges. The spicules of pig Ascaris had tapering posterior ends while those of human Ascaris were generally blunt but showed great variation. The author considers that these are separate species but that cross infection may take place.

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Accession: 000024891

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PMID: 4718127



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