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Semenas L, Arbetman M, Viozzi G, Gentiluomo J, Bontti S. Human diphyllobothriasis in Argentina: assessing the epidemiological significance from historical records and reports of new cases. Parasitol Res 2024; 123:205. [PMID: 38709381 DOI: 10.1007/s00436-024-08220-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 04/23/2024] [Indexed: 05/07/2024]
Abstract
Between 1898 and 1940, eight human cases of diphyllobothriasis were reported in Argentina, always in recently arrived European immigrants. In 1982, the first autochthonous case was detected, and since then, 33 other autochthonous cases have been reported, totaling 42 cases of human diphyllobothriasis in Argentina before the present study. Our aim is to update the information on diphyllobothriasis in Argentina by identifying specimens from new cases using morphometrical and/or molecular methods. We also aim to assess the epidemiological relevance of this food-borne disease in the country. Anamnestic data were obtained from patients or professionals, along with 26 worms identified using morphometrical (21 samples) and molecular techniques (5 samples). All the patients acquired the infection by consuming freshwater salmonids caught in Andean lakes in Northern Patagonia. Morphometrics and DNA markers of worms were compatible with Dibothriocephalus latus. In total, 68 human cases have been detected in Argentina, 60 of which were autochthonous. The human population living North-western Patagonia, whose lakes are inhabited by salmonids, is increasing. Similarly, the number of other definitive hosts for Dibothriocephalus dendriticus (gulls) and for D. latus (dogs) is also increasing. In addition, salmonid fishing and the habit of consuming home-prepared raw fish dishes are becoming widespread. Therefore, it is to be expected that diphyllobothriasis in Argentina will increase further.
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Affiliation(s)
- Liliana Semenas
- Laboratorio de Parasitología, INIBIOMA (CONICET-Universidad Nacional del Comahue), Bariloche, Río Negro, Argentina
| | - Marina Arbetman
- Grupo de Ecología de La Polinización, INIBIOMA (CONICET-Universidad Nacional del Comahue), Bariloche, Río Negro, Argentina
| | - Gustavo Viozzi
- Laboratorio de Parasitología, INIBIOMA (CONICET-Universidad Nacional del Comahue), Bariloche, Río Negro, Argentina.
| | | | - Sergio Bontti
- Laboratorio de Referencia de Enfermedades Transmisibles, Ministerio de Salud Mendoza; INBIOMED-UM, Facultad de Ciencias Médicas Universidad de Mendoza, Mendoza, Argentina
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Panti-May JA, Retana-Guiascón O, Moguel-Chin WI, Hernández-Mena DI, García-Prieto L. NEW RECORDS OF HELMINTHS OF THE JAGUAR IN MEXICO, WITH AN UPDATED LIST OF SPECIES IN THE AMERICAS. J Parasitol 2024; 110:114-126. [PMID: 38503317 DOI: 10.1645/23-56] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024] Open
Abstract
An inventory of parasites infecting the jaguar (Panthera onca) across its distribution range is relevant for the conservation of this threatened big cat. In this study, we report the occurrence of helminths in a jaguar from Mexico using morphological techniques (cleared and stained mounts and scanning electron microscopy) and partial sequences of the 28S ribosomal RNA (28S rRNA) gene and the cytochrome c oxidase 1 mitochondrial (COI) gene. We also provide an updated list of helminth species reported in jaguars in the Americas. Three helminth taxa are identified in the jaguar examined from Mexico: Toxocara cati, Physaloptera sp., and Taenia sp. The new 28S rRNA sequences of To. cati, Physaloptera sp., and Taenia sp. and the COI sequence of Taenia sp. corroborate the identity of the helminths isolated from this host. One hundred and twenty-nine records of helminths parasitizing jaguars from 49 studies up to May 2023 were identified in the Americas. In most of these studies (73.6%), helminths were identified using coproparasitological techniques. Sixteen helminths (7 nematodes, 5 cestodes, 3 acanthocephalans, and 1 trematode) were identified at the species level in free-ranging and captive jaguars. The study demonstrates the value of an integrative taxonomy approach to increase the accuracy of parasite identification in wildlife, especially when helminth specimens are scarce or poorly fixed.
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Affiliation(s)
- Jesús Alonso Panti-May
- Centro de Investigaciones Regionales "Dr. Hideyo Noguchi," Universidad Autónoma de Yucatán, Avenida Itzaés 490, Mérida, C. P. 97000, Yucatán, Mexico
| | - Oscar Retana-Guiascón
- Centro de Estudios de Desarrollo Sustentable y Aprovechamiento de la Vida Silvestre, Universidad Autónoma de Campeche, Avenida Héroe de Nacozari 480, Campeche, C. P. 24079, Campeche, Mexico
| | - Wilson Isaias Moguel-Chin
- Doctorado en Manejo de Recursos Naturales Tropicales, Universidad Autónoma de Yucatán, Carretera Mérida-Xmatkuil km 15.5, Mérida, C. P. 97315, Yucatán, Mexico
| | - David I Hernández-Mena
- Escuela Nacional de Estudios Superiores, Universidad Nacional Autónoma de México, Carretera Mérida-Tetiz km 4, Ucú, C. P. 97358, Yucatán, Mexico
- Colección Nacional de Helmintos, Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad Universitaria, C. P. 04510, Ciudad de México, Mexico
| | - Luis García-Prieto
- Colección Nacional de Helmintos, Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad Universitaria, C. P. 04510, Ciudad de México, Mexico
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Rząd I, Więcaszek B, Linowska A, Korzelecka-Orkisz A, Dzika E. Diphyllobothrium sp. and Other Parasites of Migrating and Rare Fish Species in the Southern Baltic Sea and Coastal Waters, Poland. Animals (Basel) 2024; 14:1029. [PMID: 38612268 PMCID: PMC11011110 DOI: 10.3390/ani14071029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 03/25/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
The present study is the first to analyse the parasite fauna of sole Solea solea, dab Limanda limanda, hake Merluccius merluccius, whiting Merlangius merlangus, and plaice Pleuronectes platessa in the Pomeranian Bay, as well as saithe Pollachius virens from the Szczecin Lagoon (Poland). The aim of this study was to determine the occurrence of parasites in migrating and rare fish in the Pomeranian Bay and the Szczecin Lagoon and to determine the composition of the diet of these fish. The fish for analysis were obtained in the years 2010-2019. The typical marine nematode Capillaria (Procapillaria) gracilis, rarely recorded in Poland, was found, in addition to the following parasites: Ichthyophonus hoferi, Trichodina jadranica, Diphyllobothrium sp., Dichelyne (Cucullanellus) minutus, Raphidascaris acus, Anisakis simplex, Contracaecum osculatum, Hysterothylacium aduncum, Pseudoterranova decipiens, and Echinorhynchus gadi. Because the fish species analysed in the study are not typically present in the Baltic (with the exception of plaice), and because we do not know how long they feed while they are in the Baltic, we cannot be certain which parasites they acquired in the water bodies analysed in the study and which were introduced during the migration of fish. Although these fish are outside of their normal geographic range (except for plaice), in the new environment, there were enough suitable intermediate hosts for the parasites of these fish to complete their life cycle and survive.
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Affiliation(s)
- Izabella Rząd
- Institute of Marine and Environmental Sciences, University of Szczecin, Wąska 13, 71-415 Szczecin, Poland
| | - Beata Więcaszek
- Department of Hydrobiology, Ichthyology and Reproductive Biotechnology, West Pomeranian University of Technology in Szczecin, Kazimierza Królewicza 4, 71-550 Szczecin, Poland; (B.W.); (A.L.); (A.K.-O.)
| | - Angelika Linowska
- Department of Hydrobiology, Ichthyology and Reproductive Biotechnology, West Pomeranian University of Technology in Szczecin, Kazimierza Królewicza 4, 71-550 Szczecin, Poland; (B.W.); (A.L.); (A.K.-O.)
| | - Agata Korzelecka-Orkisz
- Department of Hydrobiology, Ichthyology and Reproductive Biotechnology, West Pomeranian University of Technology in Szczecin, Kazimierza Królewicza 4, 71-550 Szczecin, Poland; (B.W.); (A.L.); (A.K.-O.)
| | - Ewa Dzika
- Department of Medical Biology, School of Public Health, University of Warmia and Mazury in Olsztyn, Zołnierska 14c, 10-561 Olsztyn, Poland;
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Salimi M, Sharifdini M, Kia EB. Molecular Characterization of Spirometra erinaceieuropaei from Jungle Cat (Felis chaus) in North of Iran. Acta Parasitol 2024; 69:574-582. [PMID: 38231311 DOI: 10.1007/s11686-023-00779-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 12/11/2023] [Indexed: 01/18/2024]
Abstract
PURPOSE The aim of this study is to conduct a molecular characterization of Spirometra tapeworm from jungle cat (Felis chaus) in Guilan Province, north of Iran using DNA sequence analysis of the mitochondrial cytochrome c oxidase subunit 1 (Cox1) and 12S rDNA sequences. METHODS Morphological features of the adult tapeworm of Spirometra were evaluated using specific staining and light microscopy. The molecular characterization was performed using partial Cox1 and 12S rDNA regions. Genetic diversity was calculated and phylogenetic trees of the obtained sequences were constructed. RESULTS Morphological features were compatible with previous description of adult Spirometra erinaceieuropaei. The Cox1 sequence of the specimen showed 100% similarity with S. erinaceieuropaei sequences in GenBank from Korea, China and Iran. Also, the 12S rDNA sequence revealed 99.7% similarity with S. erinaceieuropaei isolates from China and Japan. Intra-species variation within isolates of S. erinaceieuropaei was 0-1.4% and 0-4.6% for Cox1 and 12S rDNA genes, respectively. CONCLUSION This is the first report of molecular characterization of S. erinaceieuropaei in jungle cat, F. chaus in Iran. Jungle cat probably plays a major role as reservoir host in maintaining of this parasite in this area with favorable climate condition. Needs for further assessment on the role of appropriate hosts, especially intermediate/paratenic hosts as well as the potential risk of human infectivity with sparganosis is emphasized.
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Affiliation(s)
- Mahboobeh Salimi
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Meysam Sharifdini
- Department of Medical Parasitology and Mycology, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
| | - Eshrat Beigom Kia
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
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Yamasaki H, Sugiyama H, Morishima Y, Kobayashi H. Description of Spirometra asiana sp. nov. (Cestoda: Diphyllobothriidae) found in wild boars and hound dogs in Japan. Parasitol Int 2024; 98:102798. [PMID: 37659580 DOI: 10.1016/j.parint.2023.102798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 08/24/2023] [Accepted: 08/24/2023] [Indexed: 09/04/2023]
Abstract
According to the latest taxonomy of Spirometra species, six species (lineages) have been tentatively classified as valid. These species are Spirometra erinaceieuropaei, S. folium, S. mansoni, undescribed Spirometra sp. 1, and S. decipiens complex 1 and 2. Among these species, the undescribed species was first discovered as plerocercoid larvae in wild boars in Japan and further studies have confirmed that this species is a new taxon belonging to the genus Spirometra. Here, we describe Spirometra asiana sp. nov., which is difficult to distinguish morphologically from known Spirometra species. However, it is genetically easily distinct from other Spirometra species, thus facilitating identification. We also emphasize that S. mansoni and S. asiana, but not S. erinaceieuropaei, are etiological agents that cause human sparganosis and/or spirometrosis in Asia.
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Affiliation(s)
- Hiroshi Yamasaki
- Department of Parasitology National Institute of Infectious Diseases, Tokyo 162-8640, Japan.
| | - Hiromu Sugiyama
- Department of Parasitology National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Yasuyuki Morishima
- Department of Parasitology National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Hirotaka Kobayashi
- Department of Pathology, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
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Logvinenko AD, Gordeev II, Ekimova IA, Sokolov SG. Helminths of three species of White Sea fishes. Parasitol Res 2023; 123:39. [PMID: 38095734 DOI: 10.1007/s00436-023-08017-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 11/24/2023] [Indexed: 12/18/2023]
Abstract
Parasitic fauna of the White Sea cod, Gadus morhua marisalbi; the navaga, Eleginus nawaga; and the shorthorn sculpin, Myoxocephalus scorpius, in the White Sea was repeatedly studied, but no large-scale parasitological surveys have been made in the recent three decades. To fill this gap, we conducted a survey of the helminths of these three fish species at the White Sea Biological Station (Karelia, Russia) of the Lomonosov Moscow State University in August 2021. The navaga (50 specimens studied) was found to be infected with 13 species of helminths; the White Sea cod (50 specimens), with 12 species; and the shorthorn sculpin (21 specimens), with 13 species. Plerocercoids of Diphyllobothrium schistochilus and third-stage juveniles of Pseudoterranova bulbosa were recorded in the White Sea for the first time. The helminth infracommunities of the navaga and the White Sea cod were closer in structure to each other than to those of the shorthorn sculpin. In general, the levels of helminth infection of the White Sea cod, the navaga, and shorthorn sculpin have been consistently high over 85 years of observations in the White Sea, but long-term trends in the abundance of some helminth species were multidirectional.
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Affiliation(s)
- Andrey D Logvinenko
- Department of Invertebrate Zoology, Faculty of Biology, Lomonosov Moscow State University, Leninskie Gory 1/12, Moscow, 119234, Russia
| | - Ilya I Gordeev
- Department of Invertebrate Zoology, Faculty of Biology, Lomonosov Moscow State University, Leninskie Gory 1/12, Moscow, 119234, Russia.
- Pacific Salmon Department, Russian Federal Research Institute of Fisheries and Oceanography, Okruzhnoy Pr. 19, Moscow, 105187, Russia.
| | - Irina A Ekimova
- Department of Invertebrate Zoology, Faculty of Biology, Lomonosov Moscow State University, Leninskie Gory 1/12, Moscow, 119234, Russia
| | - Sergey G Sokolov
- Center of Parasitology of the Severtsov Institute of Ecology and Evolution of RAS, Leninskiy Pros. 33, Moscow, 119071, Russia
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Fan CK, Barčák D, Scholz T, Sonko P, Orosová M, Su KE, Chang CC, Lee YJ, Kuchta R, Oros M. Human diphyllobothriosis in Taiwan: A review of cases and molecular evidence of Dibothriocephalus nihonkaiensis. Food Waterborne Parasitol 2023; 33:e00213. [PMID: 38028242 PMCID: PMC10665798 DOI: 10.1016/j.fawpar.2023.e00213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 12/01/2023] Open
Abstract
Diphyllobothriosis is an infectious disease caused by the consumption of raw freshwater or marine fish containing larvae of broad tapeworms (Diphyllobothriidae). In the present study, we critically reviewed all cases of human diphyllobothriosis reported from Taiwan, including unpublished reports from hospitals in Taipei. Genotyping based on mitochondrial DNA marker (cox1) confirmed that two of the recent cases were caused by Dibothriocephalus nihonkaiensis, which is not native to Taiwan and was probably imported with Pacific salmon infected with larvae of D. nihonkaiensis. The causative species previously reported in Taiwan could not be definitively confirmed. However, considering the distribution of Dibothriocephalus latus, which is not endemic in Taiwan, past cases diagnosed as D. latus are questionable.
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Affiliation(s)
- Chia-Kwung Fan
- Department of Molecular Parasitology and Tropical Diseases, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Daniel Barčák
- Institute of Parasitology, Slovak Academy of Sciences, Košice, Slovak Republic
| | - Tomáš Scholz
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, České Budějovice, Czech Republic
| | - Pasaikou Sonko
- Department of Molecular Parasitology and Tropical Diseases, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Department of International PhD Program in Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Martina Orosová
- Institute of Parasitology, Slovak Academy of Sciences, Košice, Slovak Republic
| | - Kua-Eyre Su
- Department of Tropical Medicine and Parasitology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Chun-Chao Chang
- Division of Infectious Diseases, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taiwan
| | - Yuarn-Jang Lee
- Division of Infectious Diseases, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taiwan
- Division of Infectious Diseases, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
| | - Roman Kuchta
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, České Budějovice, Czech Republic
| | - Mikuláš Oros
- Institute of Parasitology, Slovak Academy of Sciences, Košice, Slovak Republic
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Chai JY, Seo M, Shin DH. Paleoparasitology research on ancient helminth eggs and larvae in the Republic of Korea. PARASITES, HOSTS AND DISEASES 2023; 61:345-387. [PMID: 38043533 PMCID: PMC10693964 DOI: 10.3347/phd.23085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 10/24/2023] [Indexed: 12/05/2023]
Abstract
Paleoparasitology is a discipline that applies existing conventional and molecular techniques to study parasites found in ancient ruins. This review focuses on the history of the discovery of parasites (mostly helminth eggs and larvae) in archaeological soil samples and mummies in Korea from the Three Kingdoms Period to the Joseon Dynasty (100 BCE-1910 CE). We also briefly review important milestones in global paleoparasitology. The helminth species reported so far in Korea included Ascaris lumbricoides, Trichuris trichiura, Strongyloides stercoralis (larva), Trichostrongylus sp. (larva), Paracapillaria philippinensis (syn. Capillaria philippinensis), Enterobius vermicularis, Fasciola hepatica, dicrocoeliids, Paragonimus westermani, Clonorchis sinensis, Metagonimus yokogawai, Pygidiopsis summa, Gymnophalloides seoi, Isthmiophora hortensis, Dibothriocephalus nihonkaiensis (syn. Diphyllobothrium nihonkaiense), and Taenia spp. tapeworms. The findings obtained by Korean paleoparasitologists/archaeologists have brought about deep insight into the status of helminthic infections in Korea's past populations. Continued paleoparasitological research is essential for further understanding of ancient parasites and parasitic diseases in Korea.
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Affiliation(s)
- Jong-Yil Chai
- Department of Tropical Medicine and Parasitology, Seoul National University College of Medicine, Seoul 03080,
Korea
| | - Min Seo
- Department of Parasitology, Dankook University College of Medicine, Cheonan 31116,
Korea
| | - Dong Hoon Shin
- Department of Anatomy and Cell Biology, Seoul National University College of Medicine, Seoul 03080,
Korea
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Mathison BA, Pritt BS. The Landscape of Parasitic Infections in the United States. Mod Pathol 2023; 36:100217. [PMID: 37182583 DOI: 10.1016/j.modpat.2023.100217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 04/30/2023] [Accepted: 05/03/2023] [Indexed: 05/16/2023]
Abstract
The landscape of parasitic infections in the United States has shifted dramatically over the past century. Although infections such as malaria have been successfully eliminated, others remain endemic and pose a significant public health risk. Numerous parasitic infections are also imported each year. This article focuses on endemic parasitic infections that may be commonly seen in anatomical pathology preparations and discusses their biology, diagnostic histopathological features, and epidemiology.
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Affiliation(s)
- Blaine A Mathison
- Institute for Clinical and Experimental Pathology, ARUP Laboratories, Salt Lake City, Utah
| | - Bobbi S Pritt
- Department of Laboratory Medicine and Pathology, Divisions of Clinical Microbiology and Anatomic Pathology, Mayo Clinic, Rochester, Minnesota.
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Kuchta R, Radačovská A, Čisovská Bazsalovicsová E, Králová-Hromadová I. Ups and downs of infections with the broad fish tapeworm Dibothriocephalus latus in Europe (Part II) and Asia from 1900 to 2020. ADVANCES IN PARASITOLOGY 2023; 122:1-69. [PMID: 37657853 DOI: 10.1016/bs.apar.2023.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/03/2023]
Abstract
The broad fish tapeworm, Dibothriocephalus latus (Diphyllobothriidea), is the most important causative agent of diphyllobothriosis, a fish-borne zoonosis, in Europe. Part I of this review focused on the occurrence of D. latus in northwestern and central Europe, particularly in Fennoscandia, the Baltic, the Alpine lakes and Danube River regions during 1900-2020. Part II summarises data on D. latus from the European and Asian parts of Russia and from Asian countries. The tapeworm has occurred throughout Russia, with the most important foci in (i) the Republic of Karelia in the northwest of European Russia, (ii) the Volga River basin in the central and southern parts of European Russia, (iii) the Ob-Irtysh rivers region in the Ural region, (iv) the Yenisei-Lena rivers region in Siberia, and (v) the Lake Baikal basin in Siberia. The incidence of diphyllobothriosis has declined in recent decades, especially in European Russia, but zoonosis is still prevalent in some regions of Siberia. Cases reported from Arctic regions, the region around Lake Baikal, and the Pacific coast, including the Amur basin, however, were probably misidentifications with D. dendriticus and/or D. nihonkaiensis. No other Asian country where D. latus findings represented either imported cases or misidentifications had natural focus of diphyllobothriosis. Patterns of distribution of D. latus occurrence were similar in all Eurasian foci between 1900 and 2020. The numbers of records were associated with historical and epidemiological milestones of particular time periods.
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Affiliation(s)
- Roman Kuchta
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská, České Budějovice, Czech Republic
| | - Alžbeta Radačovská
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova, Košice, Slovakia
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Cantatore DMP, Lanfranchi AL, Canel D, Levy E, Timi JT. Plerocercoids of Adenocephalus pacificus in Argentine hakes: Broad distribution, low zoonotic risk. Int J Food Microbiol 2023; 391-393:110142. [PMID: 36841077 DOI: 10.1016/j.ijfoodmicro.2023.110142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 02/06/2023] [Accepted: 02/13/2023] [Indexed: 02/24/2023]
Abstract
Adenocephalus pacificus is a tapeworm parasitic of marine mammals and the main agent of human diphylobothriosis caused by consumption of raw or undercooked marine fishes, being considered as a reemerging disease. Despite having a broad distribution in marine mammals in both hemispheres, plerocercoid larvae in fish have only been reported in the Pacific Ocean, in Peruvian waters, from where most human cases are known. In Argentine waters larval stages of Diphyllobothriidae have been recorded in Merluccius hubbsi, a main fish resource mostly exported frozen, headed and gutted (H&G) or as fillets; therefore, the possible presence of A. pacificus in edible products, and the extent of the risk of parasitism for humans becomes of health and commercial relevance. With the aim of detecting and identifying potentially zoonotic diphyllobothriids and quantifying infection levels in viscera and fillets of hakes, 43 entire fish, 471 H&G, and 942 fillets obtained from research cruises in 2019 and 2021 from the southern Argentine Sea (44-53°S; 63-68°W) were examined by transillumination and under stereoscopic microscopy. Plerocercoids were recovered at low prevalence and mean abundance in entire fish (13.95 % and 0.35) and H&G fish (2.76 % and 0.03) but no larval worms were found adhered to musculature or peritoneum, furthermore, no larvae were found in the fillets. Larvae were genetically identified, based on sequences of the large subunit ribosomal RNA nuclear gene (lsrDNA) and the cytochrome c oxidase subunit 1 (cox1) mitochondrial gene, as members of A. pacificus, representing the first report of this species in a fish host outside South American Pacific coasts. No spatial nor bathymetric patterns in parasite burdens were observed across sampling sites, but prevalence increased with fish size. The recorded low parasite burdens, the absence of infective stages in fillets and the fact that most products are commercialized deeply frozen, diminish the risk of parasitism for consumers to a minimum. However, the identification of this zoonotic agent and the assessment of its distribution in fish products are a first indispensable step for the design of efficient and suitable measures, such as freezing or cooking meet, to ensure the prevention of human infections.
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Affiliation(s)
- Delfina M P Cantatore
- Laboratorio de Ictioparasitología, Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Funes 3350, 7600 Mar del Plata, Argentina
| | - Ana L Lanfranchi
- Laboratorio de Ictioparasitología, Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Funes 3350, 7600 Mar del Plata, Argentina
| | - Delfina Canel
- Laboratorio de Ictioparasitología, Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Funes 3350, 7600 Mar del Plata, Argentina
| | - Eugenia Levy
- Laboratorio de Ictioparasitología, Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Funes 3350, 7600 Mar del Plata, Argentina
| | - Juan T Timi
- Laboratorio de Ictioparasitología, Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Funes 3350, 7600 Mar del Plata, Argentina.
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12
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Vettorazzi R, Norbis W, Martorelli SR, Garcia G, Rios N. First report of Spirometra (Eucestoda; Diphyllobothriidae) naturally occurring in a fish host. Folia Parasitol (Praha) 2023; 70. [PMID: 37114794 DOI: 10.14411/fp.2023.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 12/22/2022] [Indexed: 04/29/2023]
Abstract
Spirometra Faust, Campbell et Kellogg, 1929 is a genus of cestodes belonging to the family Diphyllobothriidae. To date, amphibians, reptiles, and mammals are known second intermediate hosts of these parasites; humans can also be infected (the zoonotic disease is known as sparganosis or spirometrosis). Although the number of phylogenetic studies on Spirometra spp. has increased worldwide in recent years, there are few in South America. Specifically in Uruguay, molecular studies have shown that tapeworms of S. decipiens (Diesing, 1850) complexes 1 and 2 are present in this country. In this study, we characterised the larvae of Spirometra present in the annual fish Austrolebias charrua Costa et Cheffe. Phylogenetic analysis of the cytochrome c oxidase subunit I (COI) sequences of these larvae showed that they belong to S. decipiens complex 1. This is the first report of teleost fishes serving as a second intermediate host for tapeworms of the genus Spirometra in nature.
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Affiliation(s)
- Renzo Vettorazzi
- Laboratorio de Fisiologia de la Reproduccion y Ecologia de Peces, Facultad de Ciencias, Universidad de la Republica, Montevideo, Uruguay
- Seccion Genetica Evolutiva, Facultad de Ciencias, Universidad de la Republica, Montevideo, Uruguay
- Laboratorio de Biologia Parasitaria, Instituto de Higiene, Facultad de Ciencias, Universidad de la Republica, Montevideo, Uruguay (present address)
| | - Walter Norbis
- Laboratorio de Fisiologia de la Reproduccion y Ecologia de Peces, Facultad de Ciencias, Universidad de la Republica, Montevideo, Uruguay
| | - Sergio R Martorelli
- Centro de Estudios Parasitologicos y Vectores (CEPAVE-CONICET-CCT La Plata-UNLP), Buenos Aires, Argentina
| | - Graciela Garcia
- Seccion Genetica Evolutiva, Facultad de Ciencias, Universidad de la Republica, Montevideo, Uruguay
| | - Nestor Rios
- Seccion Genetica Evolutiva, Facultad de Ciencias, Universidad de la Republica, Montevideo, Uruguay
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13
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Verocai GG, Harvey TV, Sobotyk C, Siu RE, Kulpa M, Connolly M. Spirometra infection in a captive Samar cobra ( Naja samarensis) in the United States: An imported case? Int J Parasitol Parasites Wildl 2023; 20:133-137. [PMID: 36845224 PMCID: PMC9945636 DOI: 10.1016/j.ijppaw.2023.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/06/2023] [Accepted: 02/06/2023] [Indexed: 02/10/2023]
Abstract
We report a case of Spirometra infection in a Samar cobra (Naja samarensis) imported from the Philippines, belonging to a zoological collection in the southern United States. Under a poor post-surgical prognosis, the snake was euthanized, and at necropsy plerocercoids of a Diphyllobotriidea were found in its subcutaneous tissues and musculature. Molecular and phylogenetic analyses of the complete cytochrome oxidase c subunit I (cox1) gene of the mitochondrial DNA confirmed that the isolate belonged to the genus Spirometra and was closely related to Spirometra mansoni isolates from Asian countries (bootstrap support = 99.4%). Considering the origin and clinical history and handling of the animal, the snake probably arrived infected in America. We suggest the inclusion of diagnostic imaging in the investigation of sparganosis in research and disease surveillance protocols applied in the pre- and post-quarantine period to asymptomatic animals imported from endemic areas.
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Affiliation(s)
- Guilherme G. Verocai
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843, USA,Corresponding author.
| | - Tatiani V. Harvey
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - Caroline Sobotyk
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - Rachel Ellerd Siu
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - Matthew Kulpa
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - Maren Connolly
- Dallas Zoo, 650 S R L Thornton Fwy, Dallas, TX, 75203, USA
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14
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Review of the metazoan parasites of the economically and ecologically important African sharptooth catfish Clarias gariepinus in Africa: Current status and novel records. ADVANCES IN PARASITOLOGY 2023; 119:65-222. [PMID: 36707175 DOI: 10.1016/bs.apar.2022.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
One of the most widely distributed African freshwater fish is the African sharptooth catfish Clarias gariepinus (Burchell) that is naturally distributed in 8 of the 10 ichthyofaunal regions of this continent. Clarias gariepinus is a highly valued and cheap staple to local communities and an ideal aquaculture species. Consequently, interest in the parasitic communities of C. gariepinus has increased as parasites may accidentally be ingested by humans when eating uncooked fish or can be introduced into culture systems through fish stocks supplied from local rivers which affect yield, growth, and marketability. This review provides an overview of the ∼107 metazoan parasite species known to parasitise C. gariepinus in Africa and their general life cycles, morphology, paratenic and post-cyclic infections, and the biogeography and validity of records are discussed. A brief overview is included on the application of some of these parasites in environmental studies and their link to human health.
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15
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The Brief Case: the Boy Who Cried Worm. J Clin Microbiol 2023; 61:e0055322. [PMID: 36700692 PMCID: PMC9879111 DOI: 10.1128/jcm.00553-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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16
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Scholz T, Kuchta R. Fish tapeworms (Cestoda) in the molecular era: achievements, gaps and prospects. Parasitology 2022; 149:1876-1893. [PMID: 36004800 PMCID: PMC11010522 DOI: 10.1017/s0031182022001202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/11/2022] [Accepted: 08/15/2022] [Indexed: 12/29/2022]
Abstract
The tapeworms of fishes (Chondrichthyes and Actinopterygii) account one-third (1670 from around 5000) of the total tapeworm (Platyhelminthes: Cestoda) species diversity. In total 1186 species from 9 orders occur as adults in elasmobranchs (sharks, rays and chimaeras), and 484 species from 8 orders mature in ray-finned fishes (referred to here as teleosts). Teleost tapeworms are dominated by freshwater species (78%), but only 3% of elasmobranch tapeworms are known from freshwater rays of South America and Asia (Borneo). In the last 2 decades, vast progress has been made in understanding species diversity, host associations and interrelationships among fish tapeworms. In total, 172 new species have been described since 2017 (149 from elasmobranchs and 23 from teleosts; invalidly described taxa are not included, especially those from the Oriental region). Molecular data, however, largely limited to a few molecular markers (mainly 28S rDNA, but also 18S and cox1), are available for about 40% of fish tapeworm species. They allowed us to significantly improve our understanding of their interrelationships, including proposals of a new, more natural classification at the higher-taxonomy level (orders and families) as well as at the lower-taxonomy level (genera). In this review, we summarize the main advances and provide perspectives for future research.
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Affiliation(s)
- Tomáš Scholz
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Roman Kuchta
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic
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17
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Rochat EC, Paterson RA, Blasco‐Costa I, Power M, Adams CE, Greer R, Knudsen R. Temporal stability of polymorphic Arctic charr parasite communities reflects sustained divergent trophic niches. Ecol Evol 2022; 12:e9460. [PMID: 36349257 PMCID: PMC9636502 DOI: 10.1002/ece3.9460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 10/03/2022] [Accepted: 10/10/2022] [Indexed: 11/08/2022] Open
Abstract
Polymorphic Arctic charr Salvelinus alpinus populations frequently display distinct differences in habitat use, diet, and parasite communities. Changes to the relative species densities and composition of the wider fish community have the potential to alter the habitat niche of sympatric Arctic charr populations. This study evaluated the temporal stability of the parasite community, diet, and stable isotopes (δ13C, δ15N) of three sympatric Arctic charr morphs (piscivore, benthivore, and planktivore) from Loch Rannoch, Scotland, in relation to changes to the fish community. All Arctic charr morphs displayed distinct differences in parasite communities, diet, and stable isotope signatures over time, despite the establishment of four new trophically transmitted parasite taxa, and increased fish and zooplankton consumption by the piscivorous and planktivore morphs, respectively. Native parasite prevalence also increased in all Arctic charr morphs. Overall, Loch Rannoch polymorphic Arctic charr morph populations have maintained their distinct trophic niches and parasite communities through time despite changes in the fish community. This result indicates that re‐stocking a native fish species has the potential to induce shifts in the parasite community and diet of Arctic charr morphs.
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Affiliation(s)
- Eloïse C. Rochat
- Department of Arctic and Marine Biology UiT The Arctic University of Norway Tromsø Norway
- Natural History Museum of Geneva Geneva Switzerland
| | | | - Isabel Blasco‐Costa
- Department of Arctic and Marine Biology UiT The Arctic University of Norway Tromsø Norway
- Natural History Museum of Geneva Geneva Switzerland
| | - Michael Power
- Department of Biology University of Waterloo Waterloo Canada
| | - Colin E. Adams
- Scottish Centre for Ecology & the Natural Environment University of Glasgow Glasgow UK
| | | | - Rune Knudsen
- Department of Arctic and Marine Biology UiT The Arctic University of Norway Tromsø Norway
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18
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Nazarizadeh M, Peterka J, Kubečka J, Vašek M, Jůza T, de Moraes KR, Čech M, Holubová M, Souza AT, Blabolil P, Muška M, Tsering L, Bartoň D, Říha M, Šmejkal M, Tušer M, Vejřík L, Frouzová J, Jarić I, Prchalová M, Vejříková I, Štefka J. Different hosts in different lakes: prevalence and population genetic structure of plerocercoids of Ligula intestinalis (Cestoda) in Czech water bodies. Folia Parasitol (Praha) 2022; 69. [DOI: 10.14411/fp.2022.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 04/26/2022] [Indexed: 01/05/2023]
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19
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Kutyrev IA, Mordvinov VA. Population genetic structure of diphyllobothriid tapeworms (Cestoda: Diphyllobothriidea) parasitising fish in the Baikal Rift Zone. DISEASES OF AQUATIC ORGANISMS 2022; 148:113-125. [PMID: 35297380 DOI: 10.3354/dao03646] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Tapeworms of the genus Dibothriocephalus are widely distributed throughout the world, and some are agents of human diphyllobothriasis, one of the most important fish-borne zoonoses caused by a cestode parasite. Until now, the population genetic structure of diphyllobothriid tapeworms in the Baikal Rift Zone (BRZ) has remained unexplored. The major aim of this study was to analyse the population genetic structure of D. dendriticus and D. ditremus parasitising fish in the BRZ based on internal transcribed spacer 1 (ITS1) and mitochondrial gene cytochrome oxidase subunit I (cox1) sequences. We found that both species had complex population genetic structures. Each species formed 2 clades (D. dendriticus: Clade 1 & 2; D. ditremus Clade A & B) that differed in genetic diversity. D. dendriticus haplotypes in Clade 1 formed a star-like sub-network with a main haplotype, whereas the haplotypes in Clade 2 formed a diffuse network. We assumed that the complex population genetic structure of D. dendriticus was a consequence of populations evolving under different palaeoecological conditions during the Last Glacial Maximum. In contrast to D. dendriticus, both clades in the D. ditremus samples formed a diffuse network. Our findings revealed hypothetical pathways in the formation of the population genetic structure of diphyllobothriids in the BRZ. On one hand, isolation by distance played an important role; on the other hand, lake recolonisation from refugia and a genetic bottleneck after the end of the Last Glacial Maximum had a possible influence.
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Affiliation(s)
- Ivan A Kutyrev
- Institute of General and Experimental Biology, Siberian Branch of Russian Academy of Sciences, 670047 Ulan-Ude, Russia
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20
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Chen SY, Gong TF, He JL, Li F, Li WC, Xie LX, Xie XR, Liu YS, Zhou YF, Liu W. Molecular Characterization and Phylogenetic Analysis of Spirometra Tapeworms from Snakes in Hunan Province. Vet Sci 2022; 9:vetsci9020062. [PMID: 35202315 PMCID: PMC8879218 DOI: 10.3390/vetsci9020062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/25/2022] [Accepted: 01/30/2022] [Indexed: 12/01/2022] Open
Abstract
Sparganosis is a neglected zoonotic parasitic disease that poses huge threats to humans worldwide. Snakes play an important role in sparganosis transmission because they are the most common second intermediate hosts for Spirometra parasites. However, the population genetics of Spirometra isolates from snakes is currently not well studied in China. The present study was performed to explore the molecular characteristics and phylogenetic analysis of Spirometra tapeworms from different species of snakes in Hunan Province. This study obtained 49 Spirometra isolates from 15 geographical areas in Hunan Province, Central China. Subsequently, the 18S and 28S ribosomal DNA (rDNA) fragments were amplified from the isolated parasites, and their sequences were analyzed to assess their genetic diversity. Phylogenetic analyses were performed using the maximum likelihood algorithm. The results showed that sequence variations among these isolates were 0–2.3% and 0–0.1% for 18S and 28S rDNA, respectively. The phylogenetic analysis showed that all Spirometra isolates from Hunan Province were clustered into the same branch with Spirometra erinaceieuropaei isolated from other areas (China, Vietnam, Australia). Moreover, the phylogenetic trees revealed that Spirometra is closely related to Adenocephalus, Pyramicocephalus, Ligula, Dibothriocephalus, Schistocephalus, and Diphyllobothrium. The Spirometra isolates of different hosts/regions in Hunan Province are not host segregated or geographically isolated, and support for the taxonomic status of Spirometra tapeworms in China has been added. These results provide reference values for future accurate identification and taxonomic status of Spirometra tapeworms in China.
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Affiliation(s)
- Shu-Yu Chen
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha 410128, China; (S.-Y.C.); (T.-F.G.); (J.-L.H.); (F.L.); (W.-C.L.); (X.-R.X.); (Y.-S.L.)
| | - Teng-Fang Gong
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha 410128, China; (S.-Y.C.); (T.-F.G.); (J.-L.H.); (F.L.); (W.-C.L.); (X.-R.X.); (Y.-S.L.)
| | - Jun-Lin He
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha 410128, China; (S.-Y.C.); (T.-F.G.); (J.-L.H.); (F.L.); (W.-C.L.); (X.-R.X.); (Y.-S.L.)
| | - Fen Li
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha 410128, China; (S.-Y.C.); (T.-F.G.); (J.-L.H.); (F.L.); (W.-C.L.); (X.-R.X.); (Y.-S.L.)
| | - Wen-Chao Li
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha 410128, China; (S.-Y.C.); (T.-F.G.); (J.-L.H.); (F.L.); (W.-C.L.); (X.-R.X.); (Y.-S.L.)
| | - Li-Xing Xie
- Orient Science & Technology College, Hunan Agriculture University, Changsha 410128, China;
| | - Xin-Rui Xie
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha 410128, China; (S.-Y.C.); (T.-F.G.); (J.-L.H.); (F.L.); (W.-C.L.); (X.-R.X.); (Y.-S.L.)
| | - Yi-Song Liu
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha 410128, China; (S.-Y.C.); (T.-F.G.); (J.-L.H.); (F.L.); (W.-C.L.); (X.-R.X.); (Y.-S.L.)
| | - Ying-Fang Zhou
- Orient Science & Technology College, Hunan Agriculture University, Changsha 410128, China;
- Correspondence: (Y.-F.Z.); (W.L.)
| | - Wei Liu
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha 410128, China; (S.-Y.C.); (T.-F.G.); (J.-L.H.); (F.L.); (W.-C.L.); (X.-R.X.); (Y.-S.L.)
- Hunan Provincial the Key Laboratory of Protein Engineering in Animal Vaccine, College of Veterinary Medicine, Hunan Agricultural University, Changsha 410128, China
- Correspondence: (Y.-F.Z.); (W.L.)
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LEITE MMDS, KNOFF M, FONSECA MCGD, FELIZARDO NN, GOMES DC, SÃO CLEMENTE SCD. Cestode and nematode larvae of hygienic-sanitary importance parasitizing Balistes capriscus Gmelin, 1789, collected from fish markets of the state of Rio de Janeiro, Brazil. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.81521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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22
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Scholz T, Kuchta R, Oros M. Tapeworms as pathogens of fish: A review. JOURNAL OF FISH DISEASES 2021; 44:1883-1900. [PMID: 34529835 DOI: 10.1111/jfd.13526] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 08/20/2021] [Accepted: 08/23/2021] [Indexed: 06/13/2023]
Abstract
Tapeworms (Cestoda) represents a species rich (about 5000 species) group of flatworms (Neodermata) parasitizing all groups of vertebrates including humans, with about 1000 species parasitizing elasmobranchs and almost 500 occurring in teleosts as adults. They are common parasites of cultured fish, both as adults and larvae (metacestodes), but only few adult tapeworms are actually pathogenic for their fish hosts. In contrast, cestode larvae can be harmful for fish, especially plerocercoids migrating throughout their tissue and internal organs. Current knowledge of host-parasite relationships, including immune response of fish infected with tapeworms, is still insufficient to enable adequate control of cestodoses, and most data available were obtained several decades ago. Treatment of fish infected with adult tapeworms is effective, especially with praziquantel, whereas the treatment of metacestodes is problematic. Control measures include interruption of the complex life cycle and prevention of transport of uninspected fish to new region.
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Affiliation(s)
- Tomáš Scholz
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
| | - Roman Kuchta
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
| | - Mikuláš Oros
- Institute of Parasitology, Slovak Academy of Sciences, Košice, Slovakia
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Mathison BA, Sapp SGH. An annotated checklist of the eukaryotic parasites of humans, exclusive of fungi and algae. Zookeys 2021; 1069:1-313. [PMID: 34819766 PMCID: PMC8595220 DOI: 10.3897/zookeys.1069.67403] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 08/20/2021] [Indexed: 12/13/2022] Open
Abstract
The classification of "parasites" in the medical field is a challenging notion, a group which historically has included all eukaryotes exclusive of fungi that invade and derive resources from the human host. Since antiquity, humans have been identifying and documenting parasitic infections, and this collective catalog of parasitic agents has expanded considerably with technology. As our understanding of species boundaries and the use of molecular tools has evolved, so has our concept of the taxonomy of human parasites. Consequently, new species have been recognized while others have been relegated to synonyms. On the other hand, the decline of expertise in classical parasitology and limited curricula have led to a loss of awareness of many rarely encountered species. Here, we provide a comprehensive checklist of all reported eukaryotic organisms (excluding fungi and allied taxa) parasitizing humans resulting in 274 genus-group taxa and 848 species-group taxa. For each species, or genus where indicated, a concise summary of geographic distribution, natural hosts, route of transmission and site within human host, and vectored pathogens are presented. Ubiquitous, human-adapted species as well as very rare, incidental zoonotic organisms are discussed in this annotated checklist. We also provide a list of 79 excluded genera and species that have been previously reported as human parasites but are not believed to be true human parasites or represent misidentifications or taxonomic changes.
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Affiliation(s)
- Blaine A. Mathison
- Institute for Clinical and Experimental Pathology, ARUP Laboratories, Salt Lake City, UT, USAInstitute for Clinical and Experimental PathologySalt Lake CityUnited States of America
| | - Sarah G. H. Sapp
- Parasitic Diseases Branch, Division of Parasitic Diseases and Malaria, Centers for Disease Control and Prevention, Atlanta, GA, USACenters for Disease Control and PreventionAtlantaUnited States of America
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24
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Hernández-Orts JS, Scholz T. IMPORTANCE OF MUSEUM SPECIMENS: RESOLVING THE TAXONOMIC PUZZLE OF HUMAN-INFECTING BROAD TAPEWORMS DESCRIBED BY O. NYBELIN IN 1931, AND REDESCRIPTION OF THE TYPES OF ADENOCEPHALUS PACIFICUS. J Parasitol 2021; 107:838-840. [PMID: 34727166 DOI: 10.1645/21-63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
To avoid confusions related to the resurrection of AdenocephalusNybelin, 1931 (Cestoda: Diphyllobothriidea), the type material of the Pacific broad tapeworm, Adenocephalus pacificusNybelin, 1931, which also infects humans, is morphologically characterized. Transverse protuberances on the ventral side of proglottids anterior to gonopores, which are a diagnostic feature of the genus, are illustrated for the first time. The present study supports the importance of a study of type material even in the 'molecular era' of taxonomy, where the value of morphology is often underestimated. It also points out the need for specimen deposition in publicly accessible collections.
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Affiliation(s)
- Jesús Servando Hernández-Orts
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Tomáš Scholz
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic
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25
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Katahira H, Matsuda AT, Maeda S, Yoshida E, Banzai A, Matsuishi TF. Diphyllobothrium stemmacephalum (Cestoda: Diphyllobothriidae) found from a harbor porpoise in northern Japan, with comments on a geographical gap with human infection cases in southern Japan. Parasitol Int 2021; 87:102487. [PMID: 34757158 DOI: 10.1016/j.parint.2021.102487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 10/22/2021] [Accepted: 10/25/2021] [Indexed: 11/30/2022]
Abstract
Even though the cetacean tapeworm Diphyllobothrium stemmacephalum occurs in both cold and warm waters, human infections and final host occurrences have been confined to temperate areas in and near Japan. We recently obtained a strobila of this cestode that was excreted from a harbor porpoise accidentally caught offshore of Hokkaido of northern Japan. Genetic analysis of 28S rDNA and cox1 genes confirmed that the cestode was D. stemmacephalum. Our finding sets the northernmost record of D. stemmacephalum in the western Pacific, suggesting that the risk of human infections by this parasite in northern Japan deserves further attention.
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Affiliation(s)
- Hirotaka Katahira
- Department of Environmental Science, School of Life and Environmental Science, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan.
| | - Ayaka T Matsuda
- Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, Hakodate, Hokkaido 041-8611, Japan
| | - Saki Maeda
- Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, Hakodate, Hokkaido 041-8611, Japan
| | - Erika Yoshida
- Department of Environmental Science, School of Life and Environmental Science, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan
| | - Azusa Banzai
- Department of Environmental Science, School of Life and Environmental Science, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan
| | - Takashi F Matsuishi
- Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, Hakodate, Hokkaido 041-8611, Japan; Global Center for Food, Land and Water Resources, Hokkaido University, Kita 9 Nishi 10, Kita-ku, Sapporo 060-8589, Japan
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Králová-Hromadová I, Radačovská A, Čisovská Bazsalovicsová E, Kuchta R. Ups and downs of infections with the broad fish tapeworm Dibothriocephalus latus in Europe from 1900 to 2020: Part I. ADVANCES IN PARASITOLOGY 2021; 114:75-166. [PMID: 34696845 DOI: 10.1016/bs.apar.2021.08.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The broad fish tapeworm, Dibothriocephalus latus (Diphyllobothriidea), is the most frequent causative agent of diphyllobothriosis, a fish-borne zoonosis, in Europe. Diphyllobothriosis is characterized by the transmission of D. latus larvae to humans via the consumption of raw, marinated, smoked or inadequately cooked fish products. The most important European foci of diphyllobothriosis have been Fennoscandia, the Baltic region, the Alpine lakes region, the Danube River region, and several endemic regions in Russia. This review provides basic data on the biology, life cycle, host specificity, methods of identification of D. latus, and a detailed summary of its occurrence in intermediate and definitive hosts in Fennoscandia and the Baltic, Alpine, and Danube regions during the last 120 years (1900-2020). Deeper insight into the unique pattern of distribution of D. latus in endemic regions is provided. The numbers of records are associated with several milestones of particular time periods. The first milestone (historical), which influenced studies on D. latus in Europe, was the period during and after World War II (1941-1950). The second milestone (epidemiological) was the decade 1981-1990, when previous massive health campaigns led to a marked decline of diphyllobothriosis in Europe and less published data on D. latus. Based on recent data, the broad fish tapeworm is either absent or present at very low prevalences in Fennoscandia and the Baltic and Danube regions, but the Alpine lakes region represents a continuous ongoing circulation of the parasite in the natural environment and humans.
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Affiliation(s)
| | | | | | - Roman Kuchta
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
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27
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Bouchard É, Schurer JM, Kolapo T, Wagner B, Massé A, Locke SA, Leighton P, Jenkins EJ. Host and geographic differences in prevalence and diversity of gastrointestinal helminths of foxes ( Vulpes vulpes), coyotes ( Canis latrans) and wolves ( Canis lupus) in Québec, Canada. INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE 2021; 16:126-137. [PMID: 34552844 PMCID: PMC8441108 DOI: 10.1016/j.ijppaw.2021.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 09/02/2021] [Accepted: 09/03/2021] [Indexed: 11/01/2022]
Abstract
Wild canids are hosts to a wide range of parasites and can play a role in transmission of zoonoses. As many parasites are transmitted through food webs, and wild canids are at high trophic levels, parasite prevalence and diversity in wild canids can serve as excellent indicators of ecosystem health. Our main objectives were to update knowledge on the composition of gastrointestinal helminths in wild canids from Québec, Canada, and to describe differences in parasite prevalence and diversity among canid species and regions. Hunters and trappers provided whole carcasses of red foxes (Vulpes vulpes) (N = 176), and intestinal tracts of coyotes (Canis latrans) (N = 77) and gray wolves (Canis lupus) (N = 23) harvested for non-research purposes over the winter of 2016-2017. A modified Stoll's centrifugation sucrose flotation on feces of 250 wild canids was used, and eggs of one family and eight genera of parasitic helminths were recovered: diphyllobothriids, Taenia/Echinococcus spp., Capillaria spp., Toxascaris sp., Toxocara sp., Trichuris sp., Uncinaria sp., and Metorchis sp. Adult Taenia spp. cestodes were recovered from 61 of 276 (22%) canids. Six different species (T. hydatigena, T. twitchelli, T. crassiceps, T. polyacantha, T. krabbei, and T. pisiformis-"like") were differentiated based on DNA sequenced from 65 individual adult cestodes using primers for the nicotinamide adenosine dinucleotide dehydrogenase subunit 1 (ND1) and cytochrome c oxidase subunit 1 (CO1) mitochondrial DNA loci. Alaria sp. trematodes infected 89 of 276 canids (32%). A subset were identified as A. americana at the CO1 locus. The marine trematode Cryptocotyle lingua was reported for the first time in foxes in the province of Québec. These results help us understand more fully the predator-prey relationships within this group of canids. This baseline data in regional parasite prevalence and intensity is critical in order to detect future changes following ecological disturbances due to climate and landscape alterations.
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Affiliation(s)
- Émilie Bouchard
- University of Saskatchewan, Department of Veterinary Microbiology, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada.,Research Group on Epidemiology of Zoonoses and Public Health (GREZOSP), Faculty of Veterinary Medicine, Université de Montréal, 3200 Rue Sicotte, Saint-Hyacinthe, QC, J2S 2M2, Canada
| | - Janna M Schurer
- University of Global Health Equity, Center for One Health, Kigali, Rwanda
| | - Temitope Kolapo
- University of Saskatchewan, Department of Veterinary Microbiology, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
| | - Brent Wagner
- University of Saskatchewan, Department of Veterinary Microbiology, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
| | - Ariane Massé
- Ministère des Forêts, de La Faune et des Parcs, 880 Chemin Sainte-Foy, Québec, QC, G1S 4X4, Canada.,Research Group on Epidemiology of Zoonoses and Public Health (GREZOSP), Faculty of Veterinary Medicine, Université de Montréal, 3200 Rue Sicotte, Saint-Hyacinthe, QC, J2S 2M2, Canada
| | - Sean A Locke
- University of Puerto Rico at Mayagüez, Department of Biology, Box 9000, Mayagüez 00681, 9000, Puerto Rico
| | - Patrick Leighton
- Research Group on Epidemiology of Zoonoses and Public Health (GREZOSP), Faculty of Veterinary Medicine, Université de Montréal, 3200 Rue Sicotte, Saint-Hyacinthe, QC, J2S 2M2, Canada
| | - Emily J Jenkins
- University of Saskatchewan, Department of Veterinary Microbiology, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
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28
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Abstract
An annotated checklist of the cestode parasites of Argentinean wild birds is presented, as the result of a compilation of parasitological papers published between 1900 and April 2021. This review provides data on hosts, geographical distribution, sites of infection, location of material deposited in helminthological collections, references and taxonomic comments. A host/parasite list is also provided. During this period, 38 papers were published that gather information about 34 cestode nominal species and 11 taxa identified at generic level, belonging to three orders, ten families and 35 genera. The highest number of cestode taxa was recorded in the family Hymenolepididae, with 12 nominal species and two taxa identified at generic level, followed by Dilepididae, with eight nominal species and three taxa identified at generic level. Of the 1042 species of birds reported in Argentina, only 29 (2.8%) were reported as hosts of adult cestodes. The families of birds with the highest number of reported taxa were Laridae and Anatidae, with 20 and 14 taxa, respectively.
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29
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Kutyrev IA, Biserova NM, Mazur OE, Dugarov ZN. Experimental study of ultrastructural mechanisms and kinetics of tegumental secretion in cestodes parasitizing fish (Cestoda: Diphyllobothriidea). JOURNAL OF FISH DISEASES 2021; 44:1237-1254. [PMID: 33914351 DOI: 10.1111/jfd.13386] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Accepted: 04/16/2021] [Indexed: 06/12/2023]
Abstract
The structural response and plasticity of the cestode tegument in response to the influence of the host organism is not yet well understood. The main aims of our in vitro study were to analyse the ultrastructural mechanisms and kinetics of tegumental secretion in two cestode species, Dibothriocephalus dendriticus and Ligula interrupta, in response to the influence of fish host blood serum. The incubation of plerocercoids in the culture medium, which contained fish host blood serum, resulted in an increased number of secretory products on the tegumental surface. Our study is the first to experimentally demonstrate the formation of plerocercoid protective layers influenced by the host's internal environment factors. The mechanism of the generation of the protective layer included the following: the intensive formation of organelles in the tegumental cytons and their transfer to the distal cytoplasm of the tegument; increases in extracellular vesicles and vacuoles released on the tegumental surface; arrangement of secretory products and fine-dispersed extracellular matrix in layers; and formation of the protective layer. The structural tegumental response included increases in the glycocalyx layer and structural changes. Our study revealed that the universal mechanism of protective layer formation was intrinsic to different tapeworms. We hypothesize that plerocercoids of cestodes parasitizing fish may use tegumental secretion in the formation of a protective layer and in the release of immunoregulator molecules to evade the host's immune response.
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Affiliation(s)
- Ivan Alexandrovich Kutyrev
- Institute of General and Experimental Biology, Siberian Branch of Russian Academy of Sciences, Ulan-Ude, Russia
- Institute of Biology, Irkutsk State University, Irkutsk, Russia
| | - Natalia Mikhailovna Biserova
- Department of Invertebrate Zoology, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia
| | - Olga Evgenievna Mazur
- Institute of General and Experimental Biology, Siberian Branch of Russian Academy of Sciences, Ulan-Ude, Russia
| | - Zhargal Nimaevich Dugarov
- Institute of General and Experimental Biology, Siberian Branch of Russian Academy of Sciences, Ulan-Ude, Russia
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30
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Fraija-Fernández N, Waeschenbach A, Briscoe AG, Hocking S, Kuchta R, Nyman T, Littlewood DTJ. Evolutionary transitions in broad tapeworms (Cestoda: Diphyllobothriidea) revealed by mitogenome and nuclear ribosomal operon phylogenetics. Mol Phylogenet Evol 2021; 163:107262. [PMID: 34273503 DOI: 10.1016/j.ympev.2021.107262] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 06/11/2021] [Accepted: 07/12/2021] [Indexed: 11/19/2022]
Abstract
Broad tapeworms (Diphyllobothriidea) are parasites whose adults are capable of infecting a wide range of freshwater, marine and terrestrial tetrapods including humans. Previous works examining the evolution of habitat and host use in this group have been hampered by the lack of a well-resolved phylogeny. In order to produce a robust phylogenetic framework for diphyllobothriideans, we sequenced the complete mitochondrial genome of 13 representatives, carefully chosen to cover the major clades, and two outgroup species representing the Spathebothriidea and Haplobothriidea. In addition, complementary data from the nuclear ribosomal operon was sequenced for 10 representative taxa. Mitogenomes and ssrDNA and lsrDNA were used towards elucidating the phylogenetic framework for the Diphyllobothriidea. The Cephalochlamydidae is confirmed as the earliest diverging diphyllobothriidean lineage, and Solenophoridae and Diphyllobothriidae are sister groups. We infer a probable freshwater origin of the diphyllobothriideans. The ancestral condition for life cycle complexity could not be unambiguously resolved. However, we infer exclusive use of a three-host life cycle following the origin of the Solenophoridae + Diphyllobothriidae. Regarding definitive host use, although we infer reptiles as the most likely ancestral condition, this result should be revisited with a more densely sampled phylogeny in future studies. Freshwater habitat is used by the early diverging lineages within the Solenophoridae + Diphyllobothriidae clade. For the latter, habitat use shifts between freshwater and marine environments, and definitive host use includes marine and terrestrial mammals and birds. We use mitochondrial genomes to distinguish Schistocephalus species occurring in different species of sticklebacks and demonstrate conspecificity of Ligula cf. intestinalis specimens collected from two Fennoscandian ringed seal subspecies.
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Affiliation(s)
- Natalia Fraija-Fernández
- Department of Life Sciences, Natural History Museum, London, United Kingdom; Marine Zoology Unit, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain
| | | | - Andrew G Briscoe
- Department of Life Sciences, Natural History Museum, London, United Kingdom
| | - Suzanne Hocking
- Department of Life Sciences, Natural History Museum, London, United Kingdom
| | - Roman Kuchta
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
| | - Tommi Nyman
- Department of Ecosystems in the Barents Region, Norwegian Institute of Bioeconomy Research, Svanvik, Norway
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31
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Nyman T, Papadopoulou E, Ylinen E, Wutke S, Michell CT, Sromek L, Sinisalo T, Andrievskaya E, Alexeev V, Kunnasranta M. DNA barcoding reveals different cestode helminth species in northern European marine and freshwater ringed seals. INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE 2021; 15:255-261. [PMID: 34277335 PMCID: PMC8261468 DOI: 10.1016/j.ijppaw.2021.06.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 06/14/2021] [Accepted: 06/21/2021] [Indexed: 02/08/2023]
Abstract
Three subspecies of the ringed seal (Pusa hispida) are found in northeastern Europe: P. h. botnica in the Baltic Sea, P. h saimensis in Lake Saimaa in Finland, and P. h. ladogensis in Lake Ladoga in Russia. We investigated the poorly-known cestode helminth communities of these closely related but ecologically divergent subspecies using COI barcode data. Our results show that, while cestodes from the Baltic Sea represent Schistocephalus solidus, all worms from the two lakes are identified as Ligula intestinalis, a species that has previously not been reported from seals. The observed shift in cestode communities appears to be driven by differential availability of intermediate fish host species in marine vs. freshwater environments. Both observed cestode species normally infect fish-eating birds, so further work is required to elucidate the health and conservation implications of cestode infections in European ringed seals, whether L. intestinalis occurs also in marine ringed seals, and whether the species is able to reproduce in seal hosts. In addition, a deep barcode divergence found within S. solidus suggests the presence of cryptic diversity under this species name. COI barcoding reveals different cestodes in marine and freshwater ringed seals. Ligula intestinalis is reported for the first time from seals. A deep barcode divergence is found within Schistocephalus solidus in the Baltic Sea.
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Affiliation(s)
- Tommi Nyman
- Department of Ecosystems in the Barents Region, Norwegian Institute of Bioeconomy Research, Svanvik, Norway
| | - Elena Papadopoulou
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
| | - Eeva Ylinen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
| | - Saskia Wutke
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
| | - Craig T Michell
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
| | - Ludmila Sromek
- Department of Marine Ecosystems Functioning, Institute of Oceanography, University of Gdansk, Gdynia, Poland
| | - Tuula Sinisalo
- Department of Biological and Environmental Sciences, University of Jyväskylä, Jyväskylä, Finland
| | | | | | - Mervi Kunnasranta
- Natural Resources Institute Finland, Joensuu, Finland.,Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
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32
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Orosová M, Marková A, Provazníková I, Oros M, Radačovská A, Čadková Z, Marec F. Molecular cytogenetic analysis of a triploid population of the human broad tapeworm, Dibothriocephalus latus (Diphyllobothriidea). Parasitology 2021; 148:787-797. [PMID: 33678200 PMCID: PMC11010143 DOI: 10.1017/s0031182021000408] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/17/2021] [Accepted: 02/22/2021] [Indexed: 11/06/2022]
Abstract
The large-sized tapeworm Dibothriocephalus latus is known as the broad or fish-borne cestode of mammals that is capable to infect humans and cause diphyllobothriosis. Recently, molecular data on D. latus has been accumulating in the literature and a complete genome sequence has been published; however, little is known about the karyotype and chromosome architecture. In this study, an in-depth karyological analysis of 2 D. latus specimens was carried out. The plerocercoids originated from a perch caught in subalpine Lake Iseo (Italy) and the tapeworms were reared in hamsters. Both specimens contained cells with a highly variable number of chromosomes ranging from18 to 27. Nevertheless, the largest portion of mitotic figures (47%) showed a number corresponding to the triploid set, 3n = 27. Accordingly, the karyotype of the analyzed specimens consisted of 9 triplets of metacentric chromosomes. Fluorescence in situ hybridization (FISH) with the 18S rDNA probe clearly demonstrated the presence of 3 clusters of hybridization signals on the triplet of chromosome 7, thus confirming the triploid status of the specimens. FISH with a telomeric (TTAGGG)n probe confined hybridization signals exclusively to the terminal chromosomal regions, supporting the earlier findings that this repetitive motif is a conserved feature of tapeworm telomeres.
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Affiliation(s)
- Martina Orosová
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, Košice04001, Slovakia
| | - Anna Marková
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, Košice04001, Slovakia
| | - Irena Provazníková
- Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branišovská 31, České Budějovice37005, Czech Republic
- Faculty of Science, University of South Bohemia, Branišovská 1760, České Budějovice37005
| | - Mikuláš Oros
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, Košice04001, Slovakia
| | - Alžbeta Radačovská
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, Košice04001, Slovakia
| | - Zuzana Čadková
- Department of Zoology and Fisheries, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Science Prague (CZU), Kamýcká 129, Prague16500
| | - František Marec
- Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branišovská 31, České Budějovice37005, Czech Republic
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33
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Hernández-Orts JS, Kuzmina TA, Gomez-Puerta LA, Kuchta R. Diphyllobothrium sprakeri n. sp. (Cestoda: Diphyllobothriidae): a hidden broad tapeworm from sea lions off North and South America. Parasit Vectors 2021; 14:219. [PMID: 33888151 PMCID: PMC8063393 DOI: 10.1186/s13071-021-04661-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 02/25/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The systematic of several marine diphyllobothriid tapeworms of pinnipeds has been revised in recent years. However, 20 species of Diphyllobothrium from phocids and otariids are still recognized as incertae sedis. We describe a new species of Diphyllobothrium from the intestine of California sea lions Zalophus californianus (Lesson) (type-host) and South American sea lions Otaria flavescens (Shaw). METHODS Zalophus californianus from the Pacific coast of the USA and O. flavescens from Peru and Argentina were screened for parasites. Partial fragments of the large ribosomal subunit gene (lsrDNA) and the cytochrome c oxidase subunit 1 (cox1) mitochondrial gene were amplified for 22 isolates. Properly fixed material from California sea lions was examined using light and scanning electron microscopy. RESULTS A total of four lsrDNA and 21 cox1 sequences were generated and aligned with published sequences of other diphyllobothriid taxa. Based on cox1 sequences, four diphyllobothriid tapeworms from O. flavescens in Peru were found to be conspecific with Adenocephalus pacificus Nybelin, 1931. The other newly generated sequences fall into a well-supported clade with sequences of a putative new species previously identified as Diphyllobothrium sp. 1. from Z. californianus and O. flavescens. A new species, Diphyllobothrium sprakeri n. sp., is proposed for tapeworms of this clade. CONCLUSIONS Diphyllobothrium sprakeri n. sp. is the first diphyllobothriid species described from Z. californianus from the Pacific coast of North America, but O. flavescens from Argentina, Chile and Peru was confirmed as an additional host. The present study molecularly confirmed the first coinfection of two diphyllobothriid species in sea lions from the Southern Hemisphere.
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Affiliation(s)
- Jesús S Hernández-Orts
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, 37005, České Budějovice, Czech Republic.
| | - Tetiana A Kuzmina
- I. I. Schmalhausen Institute of Zoology NAS of Ukraine, 15, Bogdan Khmelnytsky Street, Kyiv, 01030, Ukraine
| | - Luis A Gomez-Puerta
- Department of Veterinary Epidemiology and Economics, School of Veterinary Medicine, National University of San Marcos, Av. Circunvalación 2800, San Borja, 41 Lima, Peru
| | - Roman Kuchta
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, 37005, České Budějovice, Czech Republic
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34
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Semenas L, Viozzi G, Arbetman M. A regional study of the zoonotic broad tapeworm Dibothriocephalus spp. in Northwestern Patagonia (Argentina): origin of fishes and coastal cities as factors affecting infection in fishes. Parasitol Res 2021; 120:2415-2427. [PMID: 33851249 DOI: 10.1007/s00436-021-07150-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 04/04/2021] [Indexed: 01/30/2023]
Abstract
Diphyllobothriosis was first recorded in humans in Argentina in 1892 and in introduced salmonids in 1952. The aim of this work is to assess factors influencing the values of prevalence and abundance of plerocercoids in fishes that could increase the risk of transmission of Dibothriocephalus spp. in Andean Patagonian lakes. We analysed two key issues potentially related to the occurrence of tapeworms in fish: the presence of cities on coastlines (as potential sources of eggs to nearby lakes) and the difference between native and exotic fishes in susceptibility to infection. We investigated the probability of finding parasites in fish, the variation in parasite abundance in different environments and the relationship between host length and occurrence of plerocercoids. A total of 3226 fishes (belonging to six autochthonous and four introduced species) were analysed between 2010 and 2019 in eight environments. Plerocercoids were counted, and a subset was determined molecularly to species level. Two species, Dibothriocephalus latus and Dibothriocephalus dendriticus, were identified from both salmonids and native fishes, this being the first molecular confirmation of these tapeworm species parasitizing native South American fishes. Salmonids had higher levels of infection than native fishes, and these levels were higher in aquatic environments with a city on their coastline. Transmission to humans seems to occur mainly through Oncorhynchus mykiss, which showed the highest infection values and is the species most captured by fishers. Based on previous data and the present results, eggs shed by humans, dogs and gulls in cities could be the principal factors in maintaining the life cycle of this parasite in surrounding aquatic environments.
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Affiliation(s)
- Liliana Semenas
- Laboratorio de Parasitología, INIBIOMA (Universidad Nacional del Comahue-CONICET), San Carlos de Bariloche, Río Negro, Argentina
| | - Gustavo Viozzi
- Laboratorio de Parasitología, INIBIOMA (Universidad Nacional del Comahue-CONICET), San Carlos de Bariloche, Río Negro, Argentina.
| | - Marina Arbetman
- Grupo de Ecología de la Polinización, INIBIOMA (Universidad Nacional del Comahue-CONICET), San Carlos de Bariloche, Río Negro, Argentina
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35
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Ando Y, Ono Y, Ono S. Diphyllobothriasis from Eating Sushi. Am J Trop Med Hyg 2021; 104:1953-1954. [PMID: 33844646 PMCID: PMC8176519 DOI: 10.4269/ajtmh.21-0105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 03/02/2021] [Indexed: 11/07/2022] Open
Affiliation(s)
- Yuya Ando
- 1Department of General Medicine, National Defense Medical College, Saitama, Japan.,2Department of Family Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yosuke Ono
- 1Department of General Medicine, National Defense Medical College, Saitama, Japan
| | - Sachiko Ono
- 3Department of Eat-loss Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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36
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Born-Torrijos A, Paterson RA, van Beest GS, Vyhlídalová T, Henriksen EH, Knudsen R, Kristoffersen R, Amundsen PA, Soldánová M. Cercarial behaviour alters the consumer functional response of three-spined sticklebacks. J Anim Ecol 2021; 90:978-988. [PMID: 33481253 DOI: 10.1111/1365-2656.13427] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 01/04/2021] [Indexed: 01/16/2023]
Abstract
Free-living parasite life stages may contribute substantially to ecosystem biomass and thus represent a significant source of energy flow when consumed by non-host organisms. However, ambient temperature and the predator's own infection status may modulate consumption rates towards parasite prey. We investigated the combined effects of temperature and predator infection status on the consumer functional response of three-spined sticklebacks towards the free-living cercariae stages of two common freshwater trematode parasites (Plagiorchis spp., Trichobilharzia franki). Our results revealed genera-specific functional responses and consumption rates towards each parasite prey: Type II for Plagiorchis spp. and Type III for T. franki, with an overall higher consumption rate on T. franki. Elevated temperature (13°C) increased the consumption rate on Plagiorchis spp. prey for sticklebacks with mild cestode infections (<5% fish body weight) only. High consumption of cercarial prey by sticklebacks may impact parasite population dynamics by severely reducing or even functionally eliminating free-living parasite life stages from the environment. This supports the potential role of fish as biocontrol agents for cercariae with similar dispersion strategies, in instances where functional response relationships have been established. Our study demonstrates how parasite consumption by non-host organisms may be shaped by traits inherent to parasite transmission and dispersal, and emphasises the need to consider free-living parasite life stages as integral energy resources in aquatic food webs.
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Affiliation(s)
- Ana Born-Torrijos
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
| | - Rachel A Paterson
- School of Biosciences, Cardiff University, Cardiff, UK.,The Norwegian Institute for Nature Research, Trondheim, Norway
| | - Gabrielle S van Beest
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic.,Cavanilles Institute for Biodiversity and Evolutionary Biology, Science Park, University of Valencia, Valencia, Spain
| | - Tereza Vyhlídalová
- Faculty of Science, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic
| | - Eirik H Henriksen
- Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, Tromsø, Norway
| | - Rune Knudsen
- Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, Tromsø, Norway
| | - Roar Kristoffersen
- Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, Tromsø, Norway
| | - Per-Arne Amundsen
- Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, Tromsø, Norway
| | - Miroslava Soldánová
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
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37
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Bagrade G, Králová-Hromadová I, Bazsalovicsová E, Radačovská A, Kołodziej-Sobocińska M. The first records of Spirometra erinaceieuropaei (Cestoda: Diphyllobothriidae), a causative agent of human sparganosis, in Latvian wildlife. Parasitol Res 2021; 120:365-371. [PMID: 33174072 PMCID: PMC7846523 DOI: 10.1007/s00436-020-06957-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 11/01/2020] [Indexed: 12/17/2022]
Abstract
Diphyllobothriid tapeworms of the genus Spirometra are causative agents of sparganosis, food-borne zoonotic parasitic disease. They have been recorded in broad spectrum of hosts, including humans, in all continents except Antarctica. Spirometra tapeworms have been intensively studied in several Asian countries; however, they have been rather neglected in Europe. The aim of this study was to provide a pilot screening of Spirometra spp. in Latvia, where data on sparganosis are not available. Tapeworms morphologically identified as diphyllobothriid species were isolated from grey wolves Canis lupus and Eurasian lynxes Lynx lynx from Latvia during the hunting periods 2013-2019. The parasites were subjected to molecular genotyping using sequences of the partial large (LSU rDNA; 615 bp) and small (SSU rDNA; 720 bp) subunits of the nuclear ribosomal RNA gene and complete (1566 bp) cytochrome c oxidase subunit I gene of the mitochondrial DNA (cox1 mtDNA). Analyses of both ribosomal subunits of 13 tapeworms revealed no intraspecific variation within the respective rDNA subunits. On the other hand, sequence analysis of mitochondrial cox1 revealed intraspecific polymorphism displayed by 12 cox1 haplotypes. Comparison of the current data with sequences of the corresponding DNA regions deposited in the GenBank revealed 99.3-99.5% (LSU rDNA), 99.2% (SSU rDNA) and 99.6-100% (cox1 mtDNA) identity of studied tapeworms with Spirometra erinaceieuropaei, which provided the first confirmation of this diphyllobothriid tapeworm in Latvia. Since S. erinaceieuropaei is probably prevalent in Latvian wildlife and may also occur in other potential host species, further studies are needed in order to acquire complex data on its geographic distribution and transmission in the natural environment of Latvia, as well as on the spectrum of its intermediate, paratenic, and definitive hosts.
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Affiliation(s)
- Guna Bagrade
- Latvian State Forest Research Institute "Silava", Rigas 111, Salaspils, LV-2169, Latvia
| | | | - Eva Bazsalovicsová
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, 040 01, Kosice, Slovakia
| | - Alžbeta Radačovská
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, 040 01, Kosice, Slovakia
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38
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Abe N, Baba T, Nakamura Y, Murakami S. Global analysis of cytochrome c oxidase subunit 1 (cox1) gene variation in Dibothriocephalus nihonkaiensis (Cestoda: Diphyllobothriidae). CURRENT RESEARCH IN PARASITOLOGY & VECTOR-BORNE DISEASES 2021; 1:100042. [PMID: 35284872 PMCID: PMC8906100 DOI: 10.1016/j.crpvbd.2021.100042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/05/2021] [Accepted: 07/14/2021] [Indexed: 11/17/2022]
Abstract
The cestode Dibothriocephalus nihonkaiensis (syns. Diphyllobothrium nihonkaiense and Diphyllobothrium klebanovskii), the broad fish tapeworm, is a parasitic agent of intestinal infection acquired by consumption of raw or undercooked Pacific salmon, Onchorhynchus spp. Sequencing studies conducted about a decade ago revealed the presence of two major lineages (A and B) in the broad fish tapeworm population within Asian coastal areas. However, in spite of the accumulation of sequence data on GenBank recently, no further genetic analyses of D. nihonkaiensis have been attempted. The present study assessed for the first time the global cox1 variation in D. nihonkaiensis. Novel partial cox1 sequences of 14 isolates of D. nihonkaiensis from 12 patients were generated, and a global genetic analysis was performed using the 14 novel and 79 previously published sequences for isolates from definitive and second intermediate hosts of this species was performed. A total of 48 haplotypes of three haplotype groups (Types A, B and C) were identified, and co-infections with genetically different D. nihonkaiensis were highlighted in humans and Pacific salmon. First global analysis of cox1 variation in Dibothriocephalus nihonkaiensis. First application of haplotype network analysis for a D. nihonkaiensis population. A total of 48 haplotypes of three haplotype groups (Type A, B and C) are identified. Co-infections with heterogenic isolates in definitive and intermediate hosts are highlighted.
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Affiliation(s)
- Niichiro Abe
- Division of Microbiology, Osaka Institute of Public Health, 8-34 Tojo-cho, Tennoji-ku, Osaka, 543–0026, Japan
- Corresponding author.
| | - Takashi Baba
- Division of Microbiology, Osaka Institute of Public Health, 8-34 Tojo-cho, Tennoji-ku, Osaka, 543–0026, Japan
| | - Yoshitaka Nakamura
- Department of Pediatrics, Kansai Medical University, 2-5-1 Shin-Machi, Hirakata, Osaka, 573-1010, Japan
| | - Shintaro Murakami
- Department of Gastroenterology, National Hospital Organization Himeji Medical Center, 68 Hon-Machi, Himeji, Hyogo, 670-8520, Japan
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39
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Nguyen TH, Dorny P, Nguyen TTG, Dermauw V. Helminth infections in fish in Vietnam: A systematic review. INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE 2020; 14:13-32. [PMID: 33384920 PMCID: PMC7770511 DOI: 10.1016/j.ijppaw.2020.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 12/01/2020] [Accepted: 12/01/2020] [Indexed: 11/01/2022]
Abstract
In Vietnam, fisheries play a key role in the national economy. Helminth infections in fish have a major impact on public health and sustainable fish production. A comprehensive summary of the recent knowledge on fish helminths is important to understand the distribution of parasites in the country, and to design effective control measures. Therefore, a systematic review was conducted, collecting available literature published between January 2004 and October 2020. A total of 108 eligible records were retrieved reporting 268 helminth species, among which are digeneans, monogeneans, cestodes, nematodes and acanthocephalans. Some helminths were identified with zoonotic potential, such as, the heterophyids, opisthorchiids, the nematodes Gnathostoma spinigerum, Anisakis sp. and Capillaria spp. and the cestode Hysterothylacium; and with highly pathogenic potential, such as, the monogeneans of Capsalidae, Diplectanidae and Gyrodactylidae, the nematodes Philometra and Camallanidae, the tapeworm Schyzocotyle acheilognathi, the acanthocephalans Neoechinorhynchus and Acanthocephalus. Overall, these studies only covered about nine percent of the more than 2400 fish species occurring in the waters of Vietnam. Considering the expansion of the aquaculture sector as a part of the national economic development strategy, it is important to expand the research to cover the helminth fauna of all fish species, to assess their potential zoonotic and fish health impacts.
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Affiliation(s)
- Trang Huyen Nguyen
- Department of Residues, National Center for Veterinary Hygiene Inspection, 28/78 Giai Phong Rd, Hanoi, Viet Nam
| | - Pierre Dorny
- Department of Biomedical Sciences, Institute of Tropical Medicine, Nationalestraat 155, B-2000, Antwerp, Belgium.,Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820, Merelbeke, Belgium
| | - Thanh Thi Giang Nguyen
- Department of Parasitology, National Institute of Veterinary Research, 74 Truong Chinh Rd, Hanoi, Viet Nam
| | - Veronique Dermauw
- Department of Biomedical Sciences, Institute of Tropical Medicine, Nationalestraat 155, B-2000, Antwerp, Belgium
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40
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Lebedeva DI, Yakovleva GA, Artem’ev AV. Parasites of Common (Sterna hirundo) and Arctic (Sterna paradisaea) Terns (Charadriiformes, Laridae) in Karelia. BIOL BULL+ 2020. [DOI: 10.1134/s1062359020070092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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41
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Kondzior E, Kowalczyk R, Tokarska M, Borowik T, Zalewski A, Kołodziej-Sobocińska M. Multispecies reservoir of Spirometra erinaceieuropaei (Cestoda: Diphyllobothridae) in carnivore communities in north-eastern Poland. Parasit Vectors 2020; 13:560. [PMID: 33168087 PMCID: PMC7654582 DOI: 10.1186/s13071-020-04431-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 09/16/2020] [Indexed: 01/29/2023] Open
Abstract
Background Spirometra erinaceieuropaei is a diphylobothriid tapeworm with a complex life-cycle including definitive, intermediate and paratenic (transport) hosts. Multiple routes of parasite transmission often make it impossible to determine what type of host a specific infected animal is considered to be. Spargana larvae cause sparganosis, a severe food- and water-borne disease mainly found in Asia. In Poland, Spirometra sp. was reported in large carnivores in Białowieża Primeval Forest for the first time in the 1940s and was recently confirmed as S. erinaceieuropaei in several mammals and snakes using molecular methods. Methods In total, 583 carcasses of 9 carnivore species were necropsied between 2013 and 2019 in north-eastern (NE) Poland. The larvae of S. erinaceieuropaei (spargana) were isolated from subcutaneous tissue, counted, and preserved for genetic analyses. We calculated the prevalence and intensity of infection. To assess spatial variation in S. erinaceieuropaei infection probability in NE Poland, we applied a generalized additive model (GAM) with binomial error distribution. To confirm the species affiliation of isolated larvae, we amplified a partial fragment of the 18S rRNA gene (240 bp in length). Results Spirometra larvae were found in the subcutaneous tissue of 172 animals of 7 species and confirmed genetically as S. erinaceieuropaei. The overall prevalence in all studied hosts was 29.5% with a mean infection intensity of 14.1 ± 33.8 larvae per individual. Native European badgers and invasive raccoon dogs were characterized by the highest prevalence. An analysis of parasite spread showed a spatially diversified probability of infection with the highest values occurring in the biodiversity hot spot, Białowieża Primeval Forest. Conclusions Our study revealed that various mammal species (both native and non-native) can serve as S. erinaceieuropaei reservoirs. The frequency and level of infection may differ between selected hosts and likely depend on host diversity and habitat structure in a given area. Further studies are needed to assess the distribution of the parasite throughout Europe and the environmental and biological factors influencing infection severity in wild mammals.![]()
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Affiliation(s)
- Eliza Kondzior
- Mammal Research Institute, Polish Academy of Sciences, Stoczek 1, 17-230, Białowieża, Poland. .,Faculty of Biology, University of Białystok, Ciołkowskiego 1J, 15-245, Białystok, Poland.
| | - Rafał Kowalczyk
- Mammal Research Institute, Polish Academy of Sciences, Stoczek 1, 17-230, Białowieża, Poland
| | - Małgorzata Tokarska
- Mammal Research Institute, Polish Academy of Sciences, Stoczek 1, 17-230, Białowieża, Poland
| | - Tomasz Borowik
- Mammal Research Institute, Polish Academy of Sciences, Stoczek 1, 17-230, Białowieża, Poland
| | - Andrzej Zalewski
- Mammal Research Institute, Polish Academy of Sciences, Stoczek 1, 17-230, Białowieża, Poland
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42
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McHale B, Callahan RT, Paras KL, Weber M, Kimbrell L, Velázquez-Jiménez Y, McManamon R, Howerth EW, Verocai GG. Sparganosis due to Spirometra sp. (cestoda; Diphyllobothriidae) in captive meerkats ( Suricata suricatta). INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE 2020; 13:186-190. [PMID: 33134078 PMCID: PMC7591330 DOI: 10.1016/j.ijppaw.2020.10.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/15/2020] [Accepted: 10/15/2020] [Indexed: 11/16/2022]
Abstract
We report three cases of sparganosis due to plerocercoids of the tapeworm Spirometra sp. in captive meerkats (Suricata suricatta) from a zoo exhibit in the southeastern United States. Two meerkats were euthanized, one due to an uncontrollable seizure and the other due to trauma, and at necropsy cysts containing cestode larvae were observed. A third meerkat had a subcutaneous nodule surgically removed, which contained similar larvae. The third animal died years later, and had numerous cestode larvae in the pleural and peritoneal cavities. The larvae were morphologically identified as plerocercoids of diphyllobothriidean cestodes. On necropsy, multiple nodules, ranging in size from 2.5 to 3.0 cm, were observed in the subcutaneous tissue and muscles. Multifocally, separating skeletal muscle fibers were longitudinal and transversal sections of cestode larva. Histologically, parasitic cysts contained large numbers of neutrophils and macrophages, admixed with proteinaceous material. Molecular and phylogenetic analyses confirmed that specimens from one of the meerkats belonged to the genus Spirometra and was closely related to Spirometra plerocercoids isolated from a snake from the United States and wild felids from South America. Meerkats likely became infected by ingesting infected second intermediate hosts, such as amphibians and reptiles that may have entered the exhibit. Management practices that minimize access of meerkats and other susceptible hosts to intermediate hosts should be implemented.
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Affiliation(s)
- Brittany McHale
- Department of Pathology, College of Veterinary Medicine, University of Georgia. 501 D.W. Brooks Drive, Athens, GA 30602, USA.,Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia. 501 D.W. Brooks Drive, Athens, GA 30602, USA
| | - R Trey Callahan
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia. 501 D.W. Brooks Drive, Athens, GA 30602, USA
| | - Kelsey L Paras
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia. 501 D.W. Brooks Drive, Athens, GA 30602, USA
| | - Martha Weber
- Riverbanks Zoo & Garden, 500 Wildlife Parkway, Columbia, SC 29210, USA
| | - Lisa Kimbrell
- Riverbanks Zoo & Garden, 500 Wildlife Parkway, Columbia, SC 29210, USA
| | - Yanet Velázquez-Jiménez
- Department of Pathology, College of Veterinary Medicine, University of Georgia. 501 D.W. Brooks Drive, Athens, GA 30602, USA.,Universidad Autónoma del Estado de Puebla. Calle 21 Sur 1103, Barrio Santiago, 72410, Puebla, Puebla, Mexico
| | - Rita McManamon
- Department of Pathology, College of Veterinary Medicine, University of Georgia. 501 D.W. Brooks Drive, Athens, GA 30602, USA
| | - Elizabeth W Howerth
- Department of Pathology, College of Veterinary Medicine, University of Georgia. 501 D.W. Brooks Drive, Athens, GA 30602, USA
| | - Guilherme G Verocai
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia. 501 D.W. Brooks Drive, Athens, GA 30602, USA.,Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA
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43
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Yamasaki H, Sanpool O, Rodpai R, Sadaow L, Laummaunwai P, Un M, Thanchomnang T, Laymanivong S, Aung WPP, Intapan PM, Maleewong W. Spirometra species from Asia: Genetic diversity and taxonomic challenges. Parasitol Int 2020; 80:102181. [PMID: 32898662 DOI: 10.1016/j.parint.2020.102181] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 02/08/2023]
Abstract
Despite considerable controversy concerning the taxonomy of species within the genus Spirometra, human sparganosis and spirometrosis mainly in Asia and Europe has long been confidently ascribed to Spirometra erinaceieuropaei. Recently, the mitochondrial genomes of purported "S. erinaceieuropaei", "Spirometra decipiens" and "Spirometra ranarum" from Asia have been determined. However, it has been pointed out that the morphological criteria used for identifying these species are unsuitable and thus these identifications are questionable. In the present study, therefore, Spirometra samples from Asia were re-examined based on mitochondrial cytochrome c oxidase subunit 1 gene sequences and the identification of these species was discussed. Haplotype network and phylogenetic analyses revealed that: i) two distinct Spirometra species, Type I and Type II, are present in Asia and neither of which is close to likely European "S. erinaceieuropaei"; ii) Type I is genetically diverse and widely distributed, however Type II is known so far from Japan and Korea; iii) "S. decipiens" and "S. ranarum" reported from Asia are conspecific with Type I; iv) Type I is probably conspecific with Spirometra mansoni, and Type II may represent an undescribed species.
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Affiliation(s)
- Hiroshi Yamasaki
- Department of Parasitology, National Institute of Infectious Diseases, Ministry of Health, Labour and Welfare, Tokyo 162-8640, Japan.
| | - Oranuch Sanpool
- Department of Parasitology and Excellence in Medical Innovation, and Technology Research Group, Faculty of Medicine and Mekong Health Science Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Rutchanee Rodpai
- Department of Parasitology and Excellence in Medical Innovation, and Technology Research Group, Faculty of Medicine and Mekong Health Science Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Lakkhana Sadaow
- Department of Parasitology and Excellence in Medical Innovation, and Technology Research Group, Faculty of Medicine and Mekong Health Science Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Porntip Laummaunwai
- Department of Parasitology and Excellence in Medical Innovation, and Technology Research Group, Faculty of Medicine and Mekong Health Science Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Mesa Un
- Department of Parasitology and Excellence in Medical Innovation, and Technology Research Group, Faculty of Medicine and Mekong Health Science Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Tongjit Thanchomnang
- Department of Parasitology and Excellence in Medical Innovation, and Technology Research Group, Faculty of Medicine and Mekong Health Science Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand; Department of Parasitology, Faculty of Medicine, Mahasarakham University, Maha Sarakham 44000, Thailand
| | - Sakhone Laymanivong
- Centre of Malariology, Parasitology and Entomology, Ministry of Health, Vientiane, Lao People's Democratic Republic
| | - Win Pa Pa Aung
- Department of Microbiology, University of Medicine 2, Yangon, Myanmar
| | - Pewpan M Intapan
- Department of Parasitology and Excellence in Medical Innovation, and Technology Research Group, Faculty of Medicine and Mekong Health Science Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Wanchai Maleewong
- Department of Parasitology and Excellence in Medical Innovation, and Technology Research Group, Faculty of Medicine and Mekong Health Science Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand.
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Kuchta R, Kołodziej-Sobocińska M, Brabec J, Młocicki D, Sałamatin R, Scholz T. Sparganosis (Spirometra) in Europe in the Molecular Era. Clin Infect Dis 2020; 72:882-890. [DOI: 10.1093/cid/ciaa1036] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Indexed: 01/27/2023] Open
Abstract
Abstract
Sparganosis is a relatively neglected foodborne and waterborne disease caused by species of the tapeworm genus Spirometra, the global distribution of which has not been sufficiently recognized. Known mainly as a zoonosis of East Asia, its species are native to all inhabited continents including Europe. Spirometra has been reported from numerous wildlife species from 17 European countries, and a critical review confirmed 17 autochthonous and 8 imported human clinical cases. We present the first molecular evidence of the coincident presence of 2 species in Europe and review the current distribution to raise awareness of the parasite in this region. Spirometra erinaceieuropaei is restricted to Europe and Spirometra mansoni represents a lineage distributed mainly across Asia and Oceania that reaches Europe. The parasite is common in Eastern Europe and its distribution has potential to expand along with its invasive or migrating mammal hosts, spreading the risks of human infection.
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Affiliation(s)
- Roman Kuchta
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
| | | | - Jan Brabec
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
- Natural History Museum of Geneva, Geneva, Switzerland
| | - Daniel Młocicki
- Department of General Biology and Parasitology, Medical University of Warsaw, Warsaw, Poland
- W. Stefański Institute of Parasitology, Polish Academy of Sciences, Warsaw, Poland
| | - Rusłan Sałamatin
- Department of General Biology and Parasitology, Medical University of Warsaw, Warsaw, Poland
| | - Tomáš Scholz
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
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Bazsalovicsová E, Minárik G, Šoltys K, Radačovská A, Kuhn JA, Karlsbakk E, Skírnisson K, Králová-Hromadová I. Development of 14 Microsatellite Markers for Zoonotic Tapeworm Dibothriocephalus dendriticus (Cestoda: Diphyllobothriidea). Genes (Basel) 2020; 11:genes11070782. [PMID: 32664678 PMCID: PMC7397143 DOI: 10.3390/genes11070782] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 11/26/2022] Open
Abstract
Dibothriocephalus dendriticus is one of the causative agents of the fish-borne zoonosis diphyllobothriosis. Polymorphic microsatellite markers were originally developed for future genetic studies using microsatellite library screening and next-generation sequencing (NGS). Out of 128 microsatellite candidates selected after NGS analysis, 126 yielded PCR products of the expected size. A declared repetitive motif was confirmed in 92 loci by Sanger sequencing. The level of polymorphism was tested by fragment analysis. Statistical tests for observed and expected heterozygosities and deviations from Hardy–Weinberg equilibrium revealed 14 polymorphic microsatellite loci suitable for studies on the finer genetic structure of global populations of D. dendriticus.
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Affiliation(s)
- Eva Bazsalovicsová
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, 04001 Košice, Slovakia; (E.B.); (A.R.)
| | - Gabriel Minárik
- Medirex, a.s., Galvaniho 17/C, P.O. Box 143, 82016 Bratislava, Slovakia;
| | - Katarína Šoltys
- Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 84215 Bratislava, Slovakia;
| | - Alžbeta Radačovská
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, 04001 Košice, Slovakia; (E.B.); (A.R.)
| | - Jesper A. Kuhn
- Freshwater Ecology Group, Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, N-9037 Tromsø, Norway;
| | - Egil Karlsbakk
- Department of Biological Sciences, University of Bergen, P.O. Box 7803, N-5020 Bergen, Norway;
| | - Karl Skírnisson
- Institute for Experimental Pathology, University of Iceland, Keldnavegur 3-112, IS-112 Reykjavík, Iceland;
| | - Ivica Králová-Hromadová
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, 04001 Košice, Slovakia; (E.B.); (A.R.)
- Correspondence: ; Tel.: +421-55-6334455
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46
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Rubtsova NY, Heckmann RA. Morphological Features and Structural Analysis of Plerocercoids of Spirometra erinaceieuropaei (Cestoda: Diphyllobothriidae) from European Pine Marten, Martes martes (Mammalia: Mustelidae) in Ukraine. COMP PARASITOL 2020. [DOI: 10.1654/1525-2647-87.1.109] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nataliya Yu. Rubtsova
- Institute of Parasitic Diseases, 11455 East Via Linda, 2-419, Scottsdale, Arizona 85259, U.S.A. (e-mail: )
| | - Richard A. Heckmann
- Department of Biology, 1114 WIDB, Brigham Young University, Provo, Utah 84602, U.S.A. (e-mail: )
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Prati S, Henriksen EH, Knudsen R, Amundsen PA. Impacts of ontogenetic dietary shifts on the food-transmitted intestinal parasite communities of two lake salmonids. INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE 2020; 12:155-164. [PMID: 32577375 PMCID: PMC7300134 DOI: 10.1016/j.ijppaw.2020.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 06/08/2020] [Accepted: 06/08/2020] [Indexed: 11/06/2022]
Abstract
Ontogenetic dietary shifts are common in fish and often impact trophically transmitted parasite communities. How parasite species composition and relative abundances change among size classes, and at what rate these changes occur, is rarely examined. Hosts with a broad trophic niche are potentially exposed to a large variety of parasite species. The degree of ontogenetic changes in parasite species composition versus changes in parasite abundance should suggestively differ between thropically generalist and specialist host species. In the present study, we explore ontogenetic dietary shifts and their impact on species composition and relative abundance of intestinal parasites in two sympatric salmonid fish species, Arctic charr (Salvelinus alpinus) and brown trout (Salmo trutta) caught in the littoral habitat of a subarctic lake. Our results highlight a close interplay between ontogenetic dietary niche shifts and alterations in the acquisition of trophically transmitted parasites, leading to host-specific differences in the component community of parasites. Ontogenetic changes in the intestinal parasite community related to dietary niche shifts were distinct but less pronounced in Arctic charr than in brown trout due to a broader and more consistent dietary niche of the former and an ontogenetic shift toward piscivory in the latter. At the component community level, changes in parasite assemblages of both host species were driven by a faster increase in the heterogeneity of parasite relative abundance than in the compositional heterogeneity, a pattern that partly may be related to a rather species-poor parasite community of this subarctic study system. Separating compositional heterogeneity from heterogeneity in relative parasite abundance is important to understand how size-dependent variability shapes parasite communities of host populations. Ontogenetic dietary niche shifts generated host-specific differences in the component community of parasites. Ontogenetic changes in the intestinal parasite community were less pronounced in Arctic charr than in brown trout. Heterogeneity of parasite relative abundance increased faster than the compositional heterogeneity.
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Affiliation(s)
- Sebastian Prati
- Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, Muninbakken 21, 9019, Tromsø, Norway
| | - Eirik Haugstvedt Henriksen
- Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, Muninbakken 21, 9019, Tromsø, Norway
| | - Rune Knudsen
- Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, Muninbakken 21, 9019, Tromsø, Norway
| | - Per-Arne Amundsen
- Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, Muninbakken 21, 9019, Tromsø, Norway
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Prati S, Henriksen EH, Knudsen R, Amundsen P. Seasonal dietary shifts enhance parasite transmission to lake salmonids during ice cover. Ecol Evol 2020; 10:4031-4043. [PMID: 32489629 PMCID: PMC7244800 DOI: 10.1002/ece3.6173] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 02/17/2020] [Accepted: 02/19/2020] [Indexed: 12/19/2022] Open
Abstract
Changes in abiotic and biotic factors between seasons in subarctic lake systems are often profound, potentially affecting the community structure and population dynamics of parasites over the annual cycle. However, few winter studies exist and interactions between fish hosts and their parasites are typically confined to snapshot studies restricted to the summer season whereas host-parasite dynamics during the ice-covered period rarely have been explored. The present study addresses seasonal patterns in the infections of intestinal parasites and their association with the diet of sympatric living Arctic charr (Salvelinus alpinus) and brown trout (Salmo trutta) in Lake Takvatn, a subarctic lake in northern Norway. In total, 354 Arctic charr and 203 brown trout were sampled from the littoral habitat between June 2017 and May 2018. Six trophically transmitted intestinal parasite taxa were identified and quantified, and their seasonal variations were contrasted with dietary information from both stomachs and intestines of the fish. The winter period proved to be an important transmission window for parasites, with increased prevalence and intensity of amphipod-transmitted parasites in Arctic charr and parasites transmitted through fish prey in brown trout. In Arctic charr, seasonal patterns in parasite infections resulted mainly from temporal changes in diet toward amphipods, whereas host body size and the utilization of fish prey were the main drivers in brown trout. The overall dynamics in the community structure of parasites chiefly mirrored the seasonal dietary shifts of their fish hosts.
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Affiliation(s)
- Sebastian Prati
- Department of Arctic and Marine BiologyFaculty of Biosciences, Fisheries and EconomicsUiT The Arctic University of NorwayTromsøNorway
| | - Eirik H. Henriksen
- Department of Arctic and Marine BiologyFaculty of Biosciences, Fisheries and EconomicsUiT The Arctic University of NorwayTromsøNorway
| | - Rune Knudsen
- Department of Arctic and Marine BiologyFaculty of Biosciences, Fisheries and EconomicsUiT The Arctic University of NorwayTromsøNorway
| | - Per‐Arne Amundsen
- Department of Arctic and Marine BiologyFaculty of Biosciences, Fisheries and EconomicsUiT The Arctic University of NorwayTromsøNorway
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Zhang X, Hong X, Liu SN, Jiang P, Zhao SC, Sun CX, Wang ZQ, Cui J. Large-scale survey of a neglected agent of sparganosis Spirometra erinaceieuropaei (Cestoda: Diphyllobothriidae) in wild frogs in China. PLoS Negl Trop Dis 2020; 14:e0008019. [PMID: 32101542 PMCID: PMC7043720 DOI: 10.1371/journal.pntd.0008019] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 12/31/2019] [Indexed: 01/31/2023] Open
Abstract
Background In China, frogs play an understudied role in the spread of human sparganosis (caused by the larval form of Spirometra). However, our knowledge about the prevalence of sparganum infection in frogs remains fragmented, and the taxonomic identification of the parasite is still controversial. Methodology/Principal findings The prevalence of sparganum infection in wild frogs was surveyed at 145 geographical locations from 28 of the 34 provinces/autonomous regions/municipalities in China for six years. The collected sparganum isolates from the different locations were subjected to molecular identification by a multiplex PCR assay and then were analysed with clustering analysis. In the survey, sparganum infection was found in 8 out of 13 of the collected frog species, and the most frequently infected species was Pelophylax nigromaculatus (the infection rate was up to 14.07%). Infected frogs were found in 80 of the 145 surveyed locations. The sparganum infection rates in the wild frogs in several regions of China were still high (above 10%), especially in South and Southwest China. A total of 72 spargana were selected for molecular identification, and the clustering analysis showed that sequences from the Chinese isolates were very similar to those identified as from Spirometra erinaceieuropaei. However, the taxonomy of the genus remains confused and further analysis is required. Conclusions Eating wild frogs is associated with considerable health risks in China. Several traditional Chinese folk remedies may increase the risk of infection. The sparganum isolates in China are most likely from S. erinaceieuropaei, but new studies, especially comprehensive morphological analyses, are needed in the future. Human sparganosis has increased in recent years in China. Frogs play an important role in the spread of sparganosis. However, our knowledge about the prevalence of sparganum infection in frogs remains incomplete, and the taxonomic identification of sparganum is still controversial. In this study, the prevalence of sparganum infection in frogs was surveyed at 145 geographical locations in China. In addition, 72 spargana representing 72 distinct geographical isolates were selected for molecular identification. Frogs that tested positive for sparganum infection were found in 80 of the 145 surveyed locations, and the average infection rate was 10.96% (447/4078), with most of the spargana present in the thigh muscles of the infected frogs. The levels of sparganum infections in wild frogs in South and Southwest China were higher than those in the central and eastern regions. In the molecular identification analysis, all of the isolates revealed two specific bands in the multiplex PCR assay; the further clustering analysis of the sequenced PCR products showed that the Chinese isolates had a close relationship with Spirometra erinaceieuropaei.
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Affiliation(s)
- Xi Zhang
- Department of Parasitology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Xiu Hong
- Department of Parasitology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Shi Nan Liu
- Department of Parasitology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Peng Jiang
- Department of Parasitology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Shu Chuan Zhao
- Department of Parasitology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Chuan Xi Sun
- Department of Parasitology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Zhong Quan Wang
- Department of Parasitology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- * E-mail: (ZQW); (JC)
| | - Jing Cui
- Department of Parasitology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China
- * E-mail: (ZQW); (JC)
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Robert-Gangneux F, Autier B, Gangneux JP. Dibothriocephalus nihonkaiensis: an emerging concern in western countries? Expert Rev Anti Infect Ther 2019; 17:677-679. [PMID: 31498709 DOI: 10.1080/14787210.2019.1665028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Florence Robert-Gangneux
- Department of Parasitology, Université Rennes, CHU Rennes, Irset, Inserm, EHESP , Rennes , France
| | - Brice Autier
- Department of Parasitology, Université Rennes, CHU Rennes, Irset, Inserm, EHESP , Rennes , France
| | - Jean-Pierre Gangneux
- Department of Parasitology, Université Rennes, CHU Rennes, Irset, Inserm, EHESP , Rennes , France
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