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KMID : 0377519810060040579
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Chung-Ang Journal of Medicine
1981 Volume.6 No. 4 p.579 ~ p.589
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Ultrastructural Study on the Teguments of Juvenile and Adult Paragonimus westermani
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Lee Sang-Moon
Shim Tae-Sub
Hong Sung-Tae
Lee Soon-Hyung
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Abstract
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The teguments of juvenile and adult Paragonimus westermani were observed through scanning and’ transmission electron microscopes to outline the ultrastructural differences of the tegument by worm growth and development. The results are as follows. 1. Scale-like spines were observed around oral sucker of juvenile worms irregularly and they remained in adult worms. 2. The tegumental surfaces of juvenile worms consisted of many valleys, cobble stone-like knobs of protoplasmic processes and underdeveloped spines. The tegumental surface was wrinkled greatly and irregularly. 3. The valleys found in the tegument of juvenile worms were not observed in adult worms. And the tips of protoplasmic knobs became wide, therefore, the surface looked flat and smooth in adult worms. The spines of adult worms well protruded due to stretching of the wrinkled tegumental surface of juvenile worms. 4. The findings of transmission electron microscopy correspond well to those of scanning electron microscopy. And it was also found that subtegumental fibrous layer became thick and muscle layers were less compact in adult worms. These findings were regarded as results from the differences of the parasitic location, migration habit and developmental stages between juvenile and adult worms of P. westermani.
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