Paragonimus heterotremus Chen et Hsia, 1964 (Digenea: Paragonimidae): species identification based on the biological and
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GENETICS, EVOLUTION, AND PHYLOGENY - ORIGINAL PAPER
Paragonimus heterotremus Chen et Hsia, 1964 (Digenea: Paragonimidae): species identification based on the biological and genetic criteria, and pathology of infection Anastasia N. Voronova 1 & Vladimir V. Besprozvannykh 1 & Ha Duy Ngo 2 & Natalia G. Plekhova 3 & Nguyen Manh Hung 2 & Yulia V. Tatonova 1 Received: 5 February 2020 / Accepted: 11 October 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract As a result of the experimental infection of rats with metacercariae of Paragonimus heterotremus Chen et Hsia, 1964 from crabs (Potamiscus tannanti) caught in Yen Bai province, Vietnam, it was found that worms migrated into the lungs, to the liver and less frequently to the tissue that lines body cavities of the hosts, where they reached the adult stage, but in the muscles, worms stayed at the larval stage. Studies have shown that for P. heterotremus, rats can simultaneously play the role of the final and paratenic host; herewith, an infection with the trematode of this species can lead to the development of three forms of paragonimiasis: pulmonary, hepatic and muscular. Eggs from the adult worms localised in the liver, unlike eggs from the adult worms localised in the lungs, were not excreted into the external environment, but accumulated inside the organ. Histology and description of changes, which take place on the external surface of organs affected with P. heterotremus, are given in this study. Based on the behavioural characteristics of worms during rat infection and molecular genetic data, we established that worms from Vietnam and India should be assigned to different species of Paragonimus. P. heterotremus distribution is limited to the territory of the Southeast China, Northern Vietnam, Laos and Thailand. Keywords Paragonimus heterotremus . Rats . Morphology . Histopathology . Molecular phylogeny . Life cycles
Introduction Flukes belonging to the genus Paragonimus Dollfus, 1939 are the causative agents of one of the most serious parasitic Section Editor: David Bruce Conn Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00436-020-06929-4) contains supplementary material, which is available to authorized users. * Anastasia N. Voronova [email protected] 1
Federal Scientific Centre of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russia
2
Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, Hanoi, Vietnam
3
Pacific State Medical University, Ministry of Health of the Russian Federation, Vladivostok, Russia
diseases, which lead to the loss of human work ability and, in some cases, death. Representatives of the genus are found in North, Centre and South America, Africa, the southeastern part of Eurasia and also the Pacific Islands (Blair et al. 1999a). The genus includes more than 50 species, the vast majority of which inhabits the territory of East, South and Southeast Asia (more than 40 speci
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