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Acta Parasitologica

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Volume 61, Issue 2


Morphological, molecular and developmental characterization of the thelastomatid nematode Thelastoma bulhoesi (de Magalhães, 1900) (Oxyuridomorpha: Thelastomatidae) parasite of Periplaneta americana (Linnaeus, 1758) (Blattodea: Blattidae) in Japan

Sota Ozawa
  • Department of Environmental Biology, College of Bioscience & Biotechnology, Chubu University. 1200 Matsumoto, Kasugai, Aichi 487-8501 Japan
  • Other articles by this author:
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/ Jans Morffe
  • Instituto de Ecología y Sistemática, Carretera Varona 11835 e/ Oriente y Lindero, La Habana 19, CP 11900, Calabazar, Boyeros, La Habana, Cuba
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/ Cláudia S.L. Vicente
  • Department of Environmental Biology, College of Bioscience & Biotechnology, Chubu University. 1200 Matsumoto, Kasugai, Aichi 487-8501 Japan
  • ICAAM – Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Departamento de Biologia, Universidade de Évora, Núcleo da Mitra, Ap. 94, 7002-554 Évora, Portugal
  • Other articles by this author:
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/ Kenji Ikeda
  • Department of Environmental Biology, College of Bioscience & Biotechnology, Chubu University. 1200 Matsumoto, Kasugai, Aichi 487-8501 Japan
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/ Ryoji Shinya
  • HHMI and Division of Biology and Biological Engineering, California Institute of Technology, 1200 East California Blvd, Pasadena, CA 91125, USA
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/ Koichi Hasegawa
  • Corresponding author
  • Department of Environmental Biology, College of Bioscience & Biotechnology, Chubu University. 1200 Matsumoto, Kasugai, Aichi 487-8501 Japan
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Published Online: 2016-03-30 | DOI: https://doi.org/10.1515/ap-2016-0034


The American cockroach Periplaneta americana (Linnaeus, 1758) (Blattodea: Blattidae) has been spreading worldwide by commerce and has successfully adjusted to living with humans. There are many reports of thelastomatid parasitic nematode isolated from P. americana in many countries including USA, Canada, India, Argentina, Bulgaria, but not in Japan. We have investigated the parasitic nematodes in P. americana lab strain and field-captured individuals in Japan and found that Thelastoma bulhoesi (de Magalhães, 1900) (Oxyuridomorpha: Thelastomatidae) parasitizes with high infection rates. We described morphological, molecular, and developmental characters of the parasitic nematode because such information was missing despite it has been discovered more than one hundred years ago. We described morphometrics with DIC microscopy and fine structure of male and female adult with SEM observation. We also reveal the embryonic and postembryonic development of this nematode. This is the first report of a thelastomatid nematode isolated from American cockroach in Japan, and the data showed here is also very useful and fundamental for further analysis of the cockroach and parasite relations.

Key words: Thelastoma bulhoesi; American cockroach; taxonomy; systematics; embryogenesis; post-embryogenesis


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About the article

Received: 2015-06-18

Revised: 2015-10-23

Accepted: 2015-11-30

Published Online: 2016-03-30

Published in Print: 2016-06-01

Citation Information: Acta Parasitologica, Volume 61, Issue 2, Pages 241–254, ISSN (Online) 1896-1851, ISSN (Print) 1230-2821, DOI: https://doi.org/10.1515/ap-2016-0034.

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