Comparative morphometry, morphology of egg and adult surface topography under light and scanning electron microscopies, and metaphase karyotype among three size-races of Fasciola gigantica in Thailand.
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Date
2000-06-29
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Abstract
Comparative morphometry of eggs and adults under light microscope, and morphology of adults under scanning electron microscope (SEM) were undertaken in the three size-races (< 25 mm, 25-35 mm, > 35 mm) of Fasciola gigantica (Thailand strain). Morphometric examination revealed intraspecific variation with respects to the dimensions of eggs and adults, whereas surface topography of the three size-race adults under SEM was morphologically similar. The observations on mitotic metaphase chromosomes of spermatogonial cells from testes of the three size-races revealed 2n=20 (diploid type), and no karyotypic difference was observed among them. The meiotic metaphase chromosome was 10 bivalents in primary spermatocyte in diplotene to diakinesis, and many mature spermatozoa were seen in the testicular preparations.
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The Southeast Asian Journal of Tropical Medicine and Public Health.
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Srimuzipo P, Komalamisra C, Choochote W, Jitpakdi A, Vanichthanakorn P, Keha P, Riyong D, Sukontasan K, Komalamisra N, Sukontasan K, Tippawangkosol P. Comparative morphometry, morphology of egg and adult surface topography under light and scanning electron microscopies, and metaphase karyotype among three size-races of Fasciola gigantica in Thailand. The Southeast Asian Journal of Tropical Medicine and Public Health. 2000 Jun; 31(2): 366-73