8/20/2023 0 Comments Download horsehair worm locationThey had the typical morphological features of nematomorphan worms. Both worms were examined with the naked eye and microscopically. The other worm from the mouth of a boy was removed by his mother. She had eaten vegetables harvested from a private garden. The worm was preserved in 10% formalin before examination. The woman vomited a worm after gargling with a saline solution as she felt something was caught in her throat while she was lying in bed. The subjects lived in Kyoto city, Kyoto Prefecture, and Nara city, Nara Prefecture, Japan. The present report deals with a species of hair worm collected from laboratory institutes in November and December, 2009, one of which was vomited from an 80-year-old woman and the other was collected from the mouth of a 1-year-old boy by his mother. Of the genus Parachordodes, 2 species have been reported in Japan: Parachordodes okadai and P. Additionally, some or new records of Nematomorpha in insects were recently reported from Shiga, Niigata, Nara, Gifu, Kyoto, and Fukuoka Prefectures, Japan, and molecular and morphological data have been used to analyze the systematic relationship of Nematomorpha. ![]() Moreover, at least 13 species of freshwater Nematomorpha have been recorded to date in Japan. A human case of a Gordius worm found in the vomitus and another case of a Parachordodes worm found in the urinary system have also been reported in Korea. In these cases, worms were vomited and excreted in the feces and from anus. Records of human accidental parasitism with Parachordodes, Paragordius, or Gordius are uncommon in the literature, although many have been identified in different parts of the world from specimens recovered from the mouth, urethra, and anus. ![]() Parachordodes or Gordius worms have parasitic larval stages, and final hosts include the mantis and some carnivorous or omnivorous species of Orthoptera (Acrididae: grasshoppers, Gryllidae: crickets, etc.), and Coleoptera (Carabidae: ground beetles). The caudal end of the male is either bifurcated or has a dorsoventral groove in Gordiidae and Parachordodinae, but not in Chordodinae. When intermediate hosts are eaten by the final hosts, larvae develop to juveniles and grow to adult size. Adults of Parachordodes (Chordodidae: Parachordodinae), Gordius (Gordiidae), or the genera of the subfamily Chordodinae (Chordodidae), also commonly known as hair worms, are free-living freshwater inhabitants, and their larvae are first free-living and then infect intermediate hosts. Parachordodes or Gordius worms belong to the phylum Nematomorpha (Gordiida, Gordioidea). Despite their worldwide distribution, detailed life cycles of Nematomorpha have not been completely documented. Nematomorpha is a phylum of animals that has been poorly studied. DNA sequencing of the Parachordodes worm does not appear on the database therefore, more information on the gene sequences of the genus Parachordodes from humans, animals, or intermediates is required. which has already been reported in humans in Japan. DNA analysis on 18S rRNA partial sequence arrangements was also carried out and both worms were assumed to be close to the genus Paragordionus based on tree analysis, and far from Gordius sp. ![]() (Nematomorpha: Chordodidae) based on the characteristic morphologies of cross sections and areoles in the cuticle. They were identified as Parachordodes sp. Both worms were males having bifurcated posterior ends and male gonads in cross sectional specimens. Two gordiid worms were collected in the vomit and excreta of an 80-year-old woman in November 2009 in Kyoto city, and in the mouth of 1-year-old boy in December 2009 in Nara city, Japan, respectively. The present study was performed to describe 2 human cases infected by the horsehair worm, Parachordodes sp., in Japan.
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