Ultrastructure of house-dust mites, Dermatophagoides farinae and D. pteronyssinus

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  • TONGU Yasumasa
    Department of Parasitology, Okayama University Medical School
  • ISHII Akira
    Department of Parasitology, Okayama University Medical School
  • OH Heinan
    Department of Parasitology, Okayama University Medical School

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  • コナヒョウヒダニ Dermatophagoides farinae およびヤケヒョウヒダニ D. pteronyssinus の微細構造
  • コナヒョウヒダニDermatophagoides farinaeおよびヤケヒョウヒダニD.pteronyssinusの微細構造〔英文〕
  • コナヒョウヒダニ Dermatophagoides farinae オヨビ ヤ

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Description

The digestive tract of Dermatophagoides farinae and D. pteronyssinus was composed of pharynx, esophagus, anterior midgut, posterior midgut and hindgut. Among them the midgut had microvilli on the luminal surface of the epithelial cell. The food materials were wrapped up in a peritrophic membrane and forced to the hindgut. Microorganism was not found in the digestive tract of the mite maintained in our laboratory. Oil gland was a paired gland having the orifice at each side of posterior abdomen. This cell consisted of a single cell and contained fluid material in the lumen. Body cuticle was composed of 3 layers : epicuticle, exocuticle, and endocuticle. The endocuticle was the thickest, and was characterized by closely spaced lamellae structures. Many pore canals from epithelial cell ran through endocuticle to epicuticle. D. farinae and D. pteronyssinus described here did not have symbionts such as microorganism.

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