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  • Title: The distribution of excretory/secretory antigens during the muscle phase of Trichinella spiralis and T. pseudospiralis infections.
    Author: Li CK, Chung YY, Ko RC.
    Journal: Parasitol Res; 1999 Dec; 85(12):993-8. PubMed ID: 10599922.
    Abstract:
    The in situ distribution of excretory/secretory (ES) antigens of the infective-stage larvae of Trichinella spiralis and T. pseudospiralis was compared at various periods of development by immunofluorescent laser confocal microscopy and the immunoperoxidase method. In the former infection, epitopes of the ES antigens were always confined exclusively within the nurse cell, i.e., in the cytoplasmic region, hypertrophic nuclei, stichocytes, and cuticular surface of worms. In the latter infection, as early as at day 15 postinfection, ES epitopes were located along the infected myofibers, in the adjacent muscles, hypertrophic nuclei, stichocytes, and cuticular surface of worms. By day 30 postinfection there was a marked increase in both the distribution and the intensity of ES antigens in infected as opposed to uninfected myofibers. A new method was also developed to reveal the number of hypertrophic nuclei, small cells, and larvae in intact nurse cells. As many as four worms could be accommodated within a single complex. The number of hypertrophic nuclei within each complex varied from 15 to 81.
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