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  • Title: Comparative analysis of mobility and ultrastructure of intramuscular larvae of Trichinella spiralis and Trichinella pseudospiralis.
    Author: Al Karmi TO, Faubert GM.
    Journal: J Parasitol; 1981 Oct; 67(5):685-91. PubMed ID: 7299578.
    Abstract:
    The muscle phase of Trichinella spiralis and Trichinella pseudospiralis was studied by using scanning electron microscope techniques, closed circuit television, and video tape recording. The complete absence of any cyst structure including the pseudocapsule allows T. pseudospiralis to move freely between the muscle layers. Its rate of activity, measured as distance moved between two points, was 2.83 mm/min compared to that of the encysted T. spiralis larvae which was 0.237 mm/min. There was an absence of cellular reaction to T. pseudospiralis infection which may have been the result of either an absence of active antigen or specific suppression of the cellular response by the metabolites released by by the parasite. THe absence of a capsule around the muscle larvae of T pseudospiralis suggest a different host-parasite relationship than T spiralis.
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