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Faltýnková A, Jouet D, Nielsen ÓK, Skírnisson K. First species record of Strigea falconis Szidat, 1928 (Trematoda, Strigeidae) from gyrfalcon Falco rusticolus in Iceland-pros and cons of a complex life cycle. Parasitol Res 2024; 123:147. [PMID: 38433153 PMCID: PMC10909778 DOI: 10.1007/s00436-024-08161-w] [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: 11/14/2023] [Accepted: 02/10/2024] [Indexed: 03/05/2024]
Abstract
Strigea falconis is a common parasite of birds of prey and owls widely distributed in the Holarctic. We aimed to characterise S. falconis from Iceland via integrative taxonomic approach and to contribute to the understanding of its circulation in the Holarctic. We recovered adult S. falconis from two gyrfalcons (Falco rusticolus) collected in 2011 and 2012 in Iceland (Reykjanes Peninsula, Westfjords) and characterised them by morphological and molecular genetic (D2 of rDNA, cox1, ND1 of the mDNA) methods. We provide the first species record of S. falconis in Iceland which to the best of our knowledge is its northernmost distributional range. The presence of S. falconis in Iceland is surprising, as there are no suitable intermediate hosts allowing completion of its life cycle. Gyrfalcons are fully sedentary in Iceland; thus, the only plausible explanation is that they acquired their infection by preying upon migratory birds arriving from Europe. Our data indicate that the most likely candidates are Anseriformes and Charadriiformes. Also, we corroborate the wide geographical distribution of S. falconis, as we found a high degree of similarity between our haplotypes and sequences of mesocercariae from frogs in France and of a metacercaria from Turdus naumanni in Japan, and adults from Buteo buteo and Circus aeruginosus from the Czech Republic. The case of Strigea falconis shows the advantages of a complex life cycle and also depicts its pitfalls when a parasite is introduced to a new area with no suitable intermediate hosts. In Iceland, gyrfalcons are apparently dead-end hosts for S. falconis.
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Affiliation(s)
- Anna Faltýnková
- Department of Forest Ecology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, Brno, 613 00, Czech Republic.
| | - Damien Jouet
- ESCAPE UR7510, USC ANSES PETARD, Faculty of Pharmacy, University of Reims Champagne-Ardenne, 51 Rue Cognacq-Jay, 51096, Reims Cedex, France
| | | | - Karl Skírnisson
- Laboratory of Parasitology, Institute for Experimental Pathology, Keldur, University of Iceland, IS-112, Reykjavík, Iceland
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Presswell B, Bennett J. Gastrointestinal helminths of the Australasian harrier ( Circus approximans Peale, 1848) in New Zealand, and description of a new species of nematode, Procyrnea fraseri n. sp. (Habronematidae). J Helminthol 2024; 98:e6. [PMID: 38213187 DOI: 10.1017/s0022149x23000883] [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: 01/13/2024]
Abstract
The Australasian harrier Circus approximans, a native of Australia, New Zealand and the South Pacific, is an opportunistic hunter of small prey, although a large part of its diet consists of carrion, mainly from roadkill. Besides a record of a single, unnamed species of capillariid nematode there have been no investigations into the parasites of Australasian harriers in New Zealand. In this study, a helminthological survey of sixty-five deceased harriers from southern New Zealand uncovered a gastrointestinal helminth fauna consisting of six parasite species. Porrocaecum circinum (Nematoda) was previously described only from fragmented females, and a redescription is presented here. Procyrnea fraseri n. sp. (Nematoda) is described, and distinguished from its congeners by its slender body shape and shorter spicules. Strigea falconis (Trematoda) is reported for the first time in New Zealand. Cladotaenia anomalis (Cestoda) and Polymorphus circi (Acanthocephala) were previously described as new species elsewhere. An unnamed species of capillariid appears to be mainly confined to North Island and is rare in South Island. Prevalence and intensity metrics are given, and DNA sequences provided to accompany new re/descriptions. Potential intermediate hosts are discussed, and the origins of the helminths and their potential for pathogenicity are considered.
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Affiliation(s)
- Bronwen Presswell
- Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand
| | - Jerusha Bennett
- Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand
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Zaleśny G, Kanarek G, Pyrka E, Kołodziej-Sobocińska M, Zalewski A, Hildebrand J. The genetic structure of populations of Isthmiophora melis (Schrank, 1788) (Digenea: Echinostomatidae). Does the host's diet matter? Parasit Vectors 2023; 16:188. [PMID: 37287028 DOI: 10.1186/s13071-023-05811-3] [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: 01/25/2023] [Accepted: 05/14/2023] [Indexed: 06/09/2023] Open
Abstract
BACKGROUND Here we provide a comparative analysis of the genetic structure of populations (based on nad1 mtDNA) of Isthmiophora melis isolated from the American mink (Neogale vison), an introduced invasive species, commonly occurring in the territory of Poland, and from the striped field mouse (Apodemus agrarius). METHODS A total of 133 specimens of I. melis were obtained from naturally infected N. vison collected from six localities in Poland (108 samples) and 25 individuals of I. melis from A. agrarius. All sequences of the nad1 gene obtained during the present study were assembled and aligned. The standard statistics for haplotype composition, i.e., the number of haplotypes, haplotype diversity, nucleotide diversity, and average number of nucleotide differences, were calculated. Haplotype analysis and visualization of haplotype frequency among populations were performed using a median-joining network. RESULTS Based on the samples collected from different localities in Poland, our study revealed that the overall genetic diversity of I. melis isolated from the American mink and of the striped field mouse do not differ significantly. The median-joining network showed that the three main haplotypes are in the centre of a star-like structure, with the remaining haplotypes as the satellites, reflecting the recent expansion of the populations. CONCLUSIONS The overall genetic diversity of I. melis isolated from the American mink and striped field mouse reveals a high level of homogeneity. Moreover, regional differences in the food composition of the definitive hosts play an important role in shaping the genetic structure of the trematode populations.
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Affiliation(s)
- Grzegorz Zaleśny
- Department of Invertebrate Systematics and Ecology, Institute of Environmental Biology, Wrocław University of Environmental and Life Sciences, Kożuchowska 5B, 51-631, Wrocław, Poland.
| | - Gerard Kanarek
- Ornithological Station, Museum and Institute of Zoology, Polish Academy of Sciences, Nadwiślańska 108, 80-680, Gdańsk, Poland
| | - Ewa Pyrka
- Department of Parasitology, Faculty of Biological Sciences, Wrocław University, Przybyszewskiego 63, 51-148, Wrocław, Poland
| | | | - Andrzej Zalewski
- Mammal Research Institute, Polish Academy of Sciences, Stoczek 1, Białowieża, Poland
| | - Joanna Hildebrand
- Department of Parasitology, Faculty of Biological Sciences, Wrocław University, Przybyszewskiego 63, 51-148, Wrocław, Poland
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Enabulele EE, Lawton SP, Walker AJ, Kirk RS. Molecular epidemiological analyses reveal extensive connectivity between Echinostoma revolutum (sensu stricto) populations across Eurasia and species richness of zoonotic echinostomatids in England. PLoS One 2023; 18:e0270672. [PMID: 36745633 PMCID: PMC9901765 DOI: 10.1371/journal.pone.0270672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 06/14/2022] [Indexed: 02/07/2023] Open
Abstract
Echinostoma revolutum (sensu stricto) is a widely distributed member of the Echinostomatidae, a cosmopolitan family of digenetic trematodes with complex life cycles involving a wide range of definitive hosts, particularly aquatic birds. Integrative taxonomic studies, notably those utilising nad1 barcoding, have been essential in discrimination of E. revolutum (s.s.) within the 'Echinostoma revolutum' species complex and investigation of its molecular diversity. No studies, however, have focussed on factors affecting population genetic structure and connectivity of E. revolutum (s.s.) in Eurasia. Here, we used morphology combined with nad1 and cox1 barcoding to determine the occurrence of E. revolutum (s.s.) and its lymnaeid hosts in England for the first time, in addition to other echinostomatid species Echinoparyphium aconiatum, Echinoparyphium recurvatum and Hypoderaeum conoideum. Analysis of genetic diversity in E. revolutum (s.s.) populations across Eurasia demonstrated haplotype sharing and gene flow, probably facilitated by migratory bird hosts. Neutrality and mismatch distribution analyses support possible recent demographic expansion of the Asian population of E. revolutum (s.s.) (nad1 sequences from Bangladesh and Thailand) and stability in European (nad1 sequences from this study, Iceland and continental Europe) and Eurasian (combined data sets from Europe and Asia) populations with evidence of sub-population structure and selection processes. This study provides new molecular evidence for a panmictic population of E. revolutum (s.s.) in Eurasia and phylogeographically expands the nad1 database for identification of echinostomatids.
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Affiliation(s)
- Egie E. Enabulele
- Molecular Parasitology Laboratory, School of Life Sciences, Pharmacy and Chemistry, Kingston University, Kingston upon Thames, Surrey, United Kingdom
| | - Scott P. Lawton
- Molecular Parasitology Laboratory, School of Life Sciences, Pharmacy and Chemistry, Kingston University, Kingston upon Thames, Surrey, United Kingdom
- Epidemiology Research Unit, Department of Veterinary and Animal Sciences, Northern Faculty, Scotland’s Rural College, Inverness, United Kingdom
| | - Anthony J. Walker
- Molecular Parasitology Laboratory, School of Life Sciences, Pharmacy and Chemistry, Kingston University, Kingston upon Thames, Surrey, United Kingdom
| | - Ruth S. Kirk
- Molecular Parasitology Laboratory, School of Life Sciences, Pharmacy and Chemistry, Kingston University, Kingston upon Thames, Surrey, United Kingdom
- * E-mail:
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Gacad JLJ, Tanabe-Hosoi S, Yurlova NI, Urabe M. The complete mitogenome of Echinoparyphium aconiatum (Digenea: Echinostomatidae) and a comparison with other digenean species. Parasitol Int 2023; 92:102682. [DOI: 10.1016/j.parint.2022.102682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 09/18/2022] [Accepted: 09/18/2022] [Indexed: 10/14/2022]
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Valadão MC, Alves PV, López-Hernández D, Assis JCA, Coelho PRS, Geiger SM, Pinto HA. A new cryptic species of Echinostoma (Trematoda: Echinostomatidae) closely related to Echinostoma paraensei found in Brazil. Parasitology 2023; 150:1-11. [PMID: 36632020 PMCID: PMC10090611 DOI: 10.1017/s003118202300001x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/22/2022] [Accepted: 12/24/2022] [Indexed: 01/13/2023]
Abstract
Echinostoma paraensei, described in Brazil at the end of the 1960s and used as a biological model for a range of studies, belongs to the ‘revolutum’ complex of Echinostoma comprising species with 37 collar spines. However, molecular data are available only for a few isolates maintained under laboratory conditions, with molecular prospecting based on specimens originating from naturally infected hosts virtually lacking. The present study describes Echinostoma maldonadoi Valadão, Alves & Pinto n. sp., a species cryptically related to E. paraensei found in Brazil. Larval stages (cercariae, metacercariae and rediae) of the new species were found in the physid snail Stenophysa marmorata in the State of Minas Gerais, Brazil, the same geographical area where E. paraensei was originally described. Adult parasites obtained experimentally in Meriones unguiculatus were used for morphological (optical microscopy) and molecular [28S, internal transcribed spacer (ITS), nad1 and cox1] characterization. The morphology of larval and adult parasites (most notable the small-sized dorsal spines in the head collar), associated with low (0–0.1%) molecular divergence for 28S gene or ITS region, and only moderate divergence for the mitochondrial cox1 gene (3.83%), might suggest that the newly collected specimens should be assigned to E. paraensei. However, higher genetic divergence (6.16–6.39%) was found in the mitochondrial nad1, revealing that it is a genetically distinct, cryptic lineage. In the most informative phylogenetic reconstruction, based on nad1, E. maldonadoi n. sp. exhibited a strongly supported sister relationship with E. paraensei, which may indicate a very recent speciation event giving rise to these 2 species.
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Affiliation(s)
- Marisa C. Valadão
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, P.O. Box 486, 30123-970, Belo Horizonte, Minas Gerais, Brazil
| | - Philippe V. Alves
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, P.O. Box 486, 30123-970, Belo Horizonte, Minas Gerais, Brazil
- Section of Parasitology, Institute of Biosciences, São Paulo State University (UNESP), 18618-689, Botucatu, São Paulo, Brazil
| | - Danimar López-Hernández
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, P.O. Box 486, 30123-970, Belo Horizonte, Minas Gerais, Brazil
| | - Jordana C. A. Assis
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, P.O. Box 486, 30123-970, Belo Horizonte, Minas Gerais, Brazil
| | - Paulo R. S. Coelho
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, P.O. Box 486, 30123-970, Belo Horizonte, Minas Gerais, Brazil
| | - Stefan M. Geiger
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, P.O. Box 486, 30123-970, Belo Horizonte, Minas Gerais, Brazil
| | - Hudson A. Pinto
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, P.O. Box 486, 30123-970, Belo Horizonte, Minas Gerais, Brazil
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López-Hernández D, Valadão MC, de Melo AL, Tkach VV, Pinto HA. Elucidating the life cycle of opossum parasites: DNA sequences reveal the involvement of planorbid snails as intermediate hosts of Rhopalias spp. (Trematoda: Echinostomatidae) in Brazil. PLoS One 2023; 18:e0279268. [PMID: 36867609 PMCID: PMC9983843 DOI: 10.1371/journal.pone.0279268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 12/03/2022] [Indexed: 03/04/2023] Open
Abstract
Echinostomatid digeneans belonging to the genus Rhopalias are intestinal trematodes found mainly in opossums in the New World. The genus comprises seven species, but their life cycles and intermediate hosts have been unknown until now. During our long-term study carried out in freshwater habitats within the state of Minas Gerais, Southeast Brazil, echinostomatid cercariae lacking collar spines were found in planorbid snails Biomphalaria glabrata, Biomphalaria straminea, Drepanotrema lucidum and Gundlachia ticaga in six different batches of snail samples collected between 2010 and 2019. Morphologically, the larvae reported herein are morphologically consistent with each other and characterized by the presence of 2-3 large ovoid or spherical corpuscles in each main duct of the excretory system, resembling to Cercaria macrogranulosa previously described from the same region of Brazil. Partial sequences of the ITS (ITS1-5.8S-ITS2) region and 28S gene of the nuclear ribosomal RNA operon, and partial sequences of mitochondrial nad1 and cox1 genes were obtained and compared with the data available for members of the family Echinostomatidae. Nuclear markers indicate that all samples of cercariae evaluated in the present study can be assigned to Rhopalias, but distinct from North American isolates of Rhopalias macracanthus, Rhopalias coronatus and Rhopalias oochi (divergence 0.2-1.2% in 28S and 0.8-4.7% in ITS). The lack of differences verified in both 28S and ITS in 5 out 6 studied samples suggested that they belong to the same species. However, nad1 sequences revealed that our cercariae correspond to three distinct species of Rhopalias (interspecific divergence: 7.7-9.9%), named here as Rhopalias sp. 1, found in B. straminea and G. ticaga, Rhopalias sp. 2 found in B. glabrata and D. lucidum, and Rhopalias sp. 3 also found in D. lucidum. They also differ by 10.8-17.2% from a North American isolate of R. macracanthus sequenced in this study. The cox1 sequences obtained for Rhopalias sp. 1 and Rhopalias sp. 2 (but not Rhopalias sp. 3) reveal that they are distinct from North American isolates of R. macracanthus (genetic divergence 16.3-16.5% and 15.6-15.7%, respectively), R. coronatus (9.2-9.3% and 9.3-9.5%) and Rhopalias oochi (9.0% and 9.5-10.1%). Encysted metacercariae with general morphology similar to that of the body of cercariae were found in tadpoles of Rhinella sp. from the same stream where snails harbored Rhopalias sp. 2, suggesting that the amphibians could act as second intermediate hosts of species of Rhopalias. Data obtained provide the first insights into the life cycle of this unusual echinostomatid genus.
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Affiliation(s)
- Danimar López-Hernández
- Departamento de Parasitologia, Laboratório de Biologia de Trematoda, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Marisa Caixeta Valadão
- Departamento de Parasitologia, Laboratório de Biologia de Trematoda, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Alan Lane de Melo
- Departamento de Parasitologia, Laboratório de Biologia de Trematoda, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Vasyl V. Tkach
- Department of Biology, University of North Dakota Grand Forks, Grand Forks, ND, United States of America
| | - Hudson Alves Pinto
- Departamento de Parasitologia, Laboratório de Biologia de Trematoda, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- * E-mail:
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Sereno-Uribe AL, González-García MT, Ortega-Olivares MP, López-Jiménez A, García-Varela M, Andrade-Gómez L. First record of Patagifer bilobus (Rudolphi, 1819) Dietz, 1909 (Digenea: Echinostomatidae), with a morphological and molecular characterization from two threskiornithid species in Mexico. Parasitol Res 2022; 121:1921-1935. [PMID: 35488923 DOI: 10.1007/s00436-022-07526-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 04/18/2022] [Indexed: 10/18/2022]
Abstract
Patagifer Dietz, 1909 is a small genus of echinostomatids, with 12 recognized species, mostly parasitising threskiornithid birds, distributed worldwide. In the current research, adult specimens of the type species, Patagifer bilobus (Rudolphi, 1819) Dietz, 1909 from the white faced ibis (Plegadis chihi) and white ibis (Eudocimus albus) were re-described, providing new metrical data for the number of head collar spines. Those specimens were recorded from eight localities in Mexico and compared morphologically with specimens previously identified as Patagifer lamothei. A total of 19 specimens identified as P. bilobus including two hologenophores were sequenced with three molecular markers: domains D1-D3 of the large subunit (LSU), the internal transcribed spacer (ITS1, ITS2) plus 5.8S from the nuclear rDNA, and nicotinamide adenine dinucleotide dehydrogenase subunit 1 (nad1) from mitochondrial DNA. The new sequences were aligned with other sequences of Patagifer spp., downloaded from GenBank. Phylogenetic trees inferred from each data set, placed all the specimens in a clade, confirming that the isolates belonged to the same species. The morphological examination of specimens previously identified as P. lamothei by Ortega-Olivares MP, Hernández-Mena DI, Pérez-Ponce de León G, García-Varela M (2011) Helminths of the white ibis, Eudocimus albus (Aves Therskiornithidae) in Mexico. (Zootaxa 3088, 15-26. 10.11646/zootaxa.3088.1.2) and in combination with molecular data confirms that those specimens should be reassigned to P. bilobus. In addition, this is the first study in P. bilobus using an integrative taxonomy approach.
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Affiliation(s)
- Ana Lucia Sereno-Uribe
- Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México (UNAM), Avenida Universidad 3000, Ciudad Universitaria, 04510, Mexico City, CP, Mexico
| | - Marcelo Tonatiuh González-García
- Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México (UNAM), Avenida Universidad 3000, Ciudad Universitaria, 04510, Mexico City, CP, Mexico.,Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Ciudad Universitaria, C. P. 04510, Mexico City, Mexico
| | - Mirza Patricia Ortega-Olivares
- Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México (UNAM), Avenida Universidad 3000, Ciudad Universitaria, 04510, Mexico City, CP, Mexico
| | - Alejandra López-Jiménez
- Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México (UNAM), Avenida Universidad 3000, Ciudad Universitaria, 04510, Mexico City, CP, Mexico.,Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Ciudad Universitaria, C. P. 04510, Mexico City, Mexico
| | - Martín García-Varela
- Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México (UNAM), Avenida Universidad 3000, Ciudad Universitaria, 04510, Mexico City, CP, Mexico
| | - Leopoldo Andrade-Gómez
- Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México (UNAM), Avenida Universidad 3000, Ciudad Universitaria, 04510, Mexico City, CP, Mexico.
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Wiroonpan P, Chontananarth T, Chai JY, Purivirojkul W. The high diversity of trematode metacercariae that parasitize freshwater gastropods in Bangkok, Thailand, and their infective situations, morphologies, and phylogenetic relationships. Parasitology 2022; 149:1-56. [PMID: 35264280 DOI: 10.1017/s0031182022000312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
AbstractWe investigated diversity, infective situations, morphological features and phylogenetic relationships of the metacercariae in freshwater snails from Bangkok between March 2018 and February 2020. Crushing and dissection techniques were performed to explore the metacercariae in the snail hosts. Polymerase chain reaction was implemented to amplify the internal transcribed spacer 1 (ITS1), 5.8S ribosomal DNA and ITS2 regions of metacercarial DNA. A total of 3173 of all 21 707 snails showed infections with metacercariae, representing a relatively high infective prevalence (14.62%) compared to earlier research. All infected snails belonged to 14 species/subspecies. A group of viviparid snails exhibited the highest metacercarial infections (26.10–82.18%). We found metacercariae with seven morphological groups. Five of them can be stated as new records of the metacercariae in Thailand, indicating a broader spectrum of larval trematode diversity. Our phylogenetic assessments established that five of the seven morphological groups can be molecularly classified into different taxonomic levels of digenean trematodes. Echinostome A metacercariae revealed the highest infective prevalence (7.15%), and their sequence data were conspecific with a sequence of Echinostoma mekongki, which is a human intestinal fluke; this finding denotes the distribution and suggests epidemiological surveillance of this medically important fluke in Bangkok and adjacent areas. However, two groups of Opisthorchiata-like and renicolid metacercariae remain unclear as to their narrow taxonomic status, although their molecular properties were considered. For more understanding about trematode transmissions in ecosystems, both physical and biological factors may be further analysed to consider the factors that relate to and contribute to trematode infections.
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Affiliation(s)
- Pichit Wiroonpan
- Animal Systematics and Ecology Speciality Research Unit, Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand
| | - Thapana Chontananarth
- Applied Parasitology Research Laboratory, Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok, Thailand
- Center of Excellence in Animal, Plant and Parasitic Biotechnology, Srinakharinwirot University, Bangkok, Thailand
| | - Jong-Yil Chai
- Institute of Parasitic Diseases, Korea Association of Health Promotion (KAHP), Seoul, 07649, Korea
| | - Watchariya Purivirojkul
- Animal Systematics and Ecology Speciality Research Unit, Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand
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Valadão MC, López-Hernández D, Alves PV, Pinto HA. A new species of Echinostoma (Trematoda: Echinostomatidae) from the ' revolutum' group found in Brazil: refuting the occurrence of Echinostoma miyagawai (= E. robustum) in the Americas. Parasitology 2022; 149:325-336. [PMID: 35264265 PMCID: PMC11010529 DOI: 10.1017/s0031182021001864] [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: 09/03/2021] [Revised: 10/17/2021] [Accepted: 10/17/2021] [Indexed: 11/06/2022]
Abstract
Although Echinostoma robustum (currently a synonym of E. miyagawai) was reported in the Americas based on molecular data, morphological support on adult parasites is still required. Herein, a new species of Echinostoma is described based on worms found in a chicken from Brazil. Molecular phylogenetic analyses based on 28S (1063 bp), ITS (947 bp) and Nad-1 (442 bp) datasets reveal the inclusion of the new species within Echinostoma ‘revolutum’ species complex. Moreover, it was verified the conspecificity between cercariae previously identified as E. robustum in Brazil [identical ITS and only 0.3% of divergence (1 nucleotide) in Nad-1]. Species discovery analyses show that these two isolates form an independent lineage (species) among Echinostoma spp. Compared to E. miyagawai, the new species presents relatively high divergence in Nad-1 (7.88–9.09%). Morphologically, the specimens are distinguished from all nominal species from the ‘revolutum’ species complex by the more posterior position of the testes (length of post-testicular field as a proportion of body length about 20%). They further differ from E. miyagawai and South American Echinostoma spp. by the higher proportion of forebody to the body length. Therefore, combined molecular and morphological evidence supports the proposal of the species named here as Echinostoma pseudorobustum sp. nov.
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Affiliation(s)
- Marisa C. Valadão
- Department of Parasitology, Laboratório de Biologia de Trematoda, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P.O. Box 486, 30123-970, Belo Horizonte, Minas Gerais, Brazil
| | - Danimar López-Hernández
- Department of Parasitology, Laboratório de Biologia de Trematoda, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P.O. Box 486, 30123-970, Belo Horizonte, Minas Gerais, Brazil
| | - Philippe V. Alves
- Department of Parasitology, Laboratório de Biologia de Trematoda, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P.O. Box 486, 30123-970, Belo Horizonte, Minas Gerais, Brazil
| | - Hudson A. Pinto
- Department of Parasitology, Laboratório de Biologia de Trematoda, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P.O. Box 486, 30123-970, Belo Horizonte, Minas Gerais, Brazil
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11
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Izrailskaia AV, Besprozvannykh VV, Tatonova YV. Echinostoma chankensis nom. nov., other Echinostoma spp. and Isthmiophora hortensis in East Asia: morphology, molecular data and phylogeny within Echinostomatidae. Parasitology 2021; 148:1366-1382. [PMID: 34103113 PMCID: PMC11010142 DOI: 10.1017/s0031182021000950] [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: 04/14/2021] [Revised: 06/01/2021] [Accepted: 06/01/2021] [Indexed: 11/06/2022]
Abstract
Life cycles, and morphological and molecular data were obtained for Echinostoma chankensis nom. nov., Echinostoma cinetorchis, Echinostoma miyagawai and Isthmiophora hortensis from East Asia. It was established that, based on both life cycle and morphology data, one of the trematodes is identical to the worms designated as Euparyphium amurensis. Genetic data showed that this trematode belongs to Echinostoma. The complex data on biological, morphological and genetic characterizations establish that the distribution of the morphologically similar species, I. hortensis and Isthmiophora melis, in the Old World are limited by the East Asian and European regions, respectively. Data on mature worms of East Asian E. miyagawai revealed morphological and genetic identity with E. miyagawai from Europe. However, E. miyagawai from Europe differs from E. miyagawai from the type locality (East Asia) in terms of reaching maturity and the morphology of cercariae. These data indicate that the European worm, designated E. miyagawai, does not belong to this species. An analysis of the phylogenetic relationships of Echinostomatidae was conducted based on the 28S, ITS2 and nad1 markers. Analysis using the nad1 gene for the known representatives of Echinostomatidae is carried out for the first time, showing that nuclear markers are ineffective separate from mitochondrial ones.
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Affiliation(s)
- Anna V. Izrailskaia
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences, 100-letiya Street, 159, Vladivostok, 690022, Russian Federation
- Far Eastern Federal University, School of Biomedicine, Sukhanova, 8, Vladivostok, 690091, Russian Federation
| | - Vladimir V. Besprozvannykh
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences, 100-letiya Street, 159, Vladivostok, 690022, Russian Federation
| | - Yulia V. Tatonova
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences, 100-letiya Street, 159, Vladivostok, 690022, Russian Federation
- Far Eastern Federal University, School of Biomedicine, Sukhanova, 8, Vladivostok, 690091, Russian Federation
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12
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Pantoja C, Faltýnková A, O'Dwyer K, Jouet D, Skírnisson K, Kudlai O. Diversity of echinostomes (Digenea: Echinostomatidae) in their snail hosts at high latitudes. ACTA ACUST UNITED AC 2021; 28:59. [PMID: 34319230 PMCID: PMC8336728 DOI: 10.1051/parasite/2021054] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 06/24/2021] [Indexed: 11/14/2022]
Abstract
The biodiversity of freshwater ecosystems globally still leaves much to be discovered, not least in the trematode parasite fauna they support. Echinostome trematode parasites have complex, multiple-host life-cycles, often involving migratory bird definitive hosts, thus leading to widespread distributions. Here, we examined the echinostome diversity in freshwater ecosystems at high latitude locations in Iceland, Finland, Ireland and Alaska (USA). We report 14 echinostome species identified morphologically and molecularly from analyses of nad1 and 28S rDNA sequence data. We found echinostomes parasitising snails of 11 species from the families Lymnaeidae, Planorbidae, Physidae and Valvatidae. The number of echinostome species in different hosts did not vary greatly and ranged from one to three species. Of these 14 trematode species, we discovered four species (Echinoparyphium sp. 1, Echinoparyphium sp. 2, Neopetasiger sp. 5, and Echinostomatidae gen. sp.) as novel in Europe; we provide descriptions for the newly recorded species and those not previously associated with DNA sequences. Two species from Iceland (Neopetasiger islandicus and Echinoparyphium sp. 2) were recorded in both Iceland and North America. All species found in Ireland are new records for this country. Via an integrative taxonomic approach taken, both morphological and molecular data are provided for comparison with future studies to elucidate many of the unknown parasite life cycles and transmission routes. Our reports of species distributions spanning Europe and North America highlight the need for parasite biodiversity assessments across large geographical areas.
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Affiliation(s)
- Camila Pantoja
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic - Institute of Ecology, Nature Research Centre, Akademijos 2, 08412 Vilnius, Lithuania
| | - Anna Faltýnková
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Katie O'Dwyer
- Marine and Freshwater Research Centre, Galway-Mayo Institute of Technology, H91 T8NW Galway, Ireland
| | - Damien Jouet
- BioSpecT EA7506, Faculty of Pharmacy, University of Reims Champagne-Ardenne, 51 rue Cognacq-Jay, 51096 Reims Cedex, France
| | - Karl Skírnisson
- Laboratory of Parasitology, Institute for Experimental Pathology, Keldur, University of Iceland, IS-112 Reykjavík, Iceland
| | - Olena Kudlai
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic - Institute of Ecology, Nature Research Centre, Akademijos 2, 08412 Vilnius, Lithuania
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13
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Achatz TJ, Bennett DM, Martens JR, Sorensen RE, Nelson RG, Bates KM, Serbina EA, Tkach VV. DESCRIPTION AND PHYLOGENETIC AFFINITIES OF A NEW SPECIES OF NEOPSILOTREMA (DIGENEA: PSILOSTOMIDAE) FROM LESSER SCAUP, AYTHYA AFFINIS (ANSERIFORMES: ANATIDAE). J Parasitol 2021; 107:566-574. [PMID: 34310683 DOI: 10.1645/21-25] [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
Neopsilotrema is a small genus of psilostomid digeneans parasitic in the intestine of birds in the Palearctic and Nearctic. At present, the genus includes 4 species: Neopsilotrema lisitsynae from the Palearctic and Neopsilotrema affine, Neopsilotrema lakotae, and Neopsilotrema marilae from the Nearctic. Herein, we describe a new species, Neopsilotrema itascae n. sp., from lesser scaup Aythya affinis collected in Minnesota. The species can be distinguished from congeners on the basis of the ventral sucker:oral sucker width ratio, body width:length ratio, and cirrus sac size, along with other characters. We generated new 28S ribosomal deoxyribonucleic acid (DNA) and NADH dehydrogenase (ND1) mitochondrial DNA sequence data of a variety of psilostomids from the Palearctic and Nearctic along with sequences of the ribosomal internal transcribed spacer (ITS) region (ITS1 + 5.8S + ITS2) from 3 Neopsilotrema species. The molecular phylogenetic affinities of a variety of psilostomid taxa were studied using 28S sequence data. The 28S sequences of psilostomids demonstrated 1-7.9% intergeneric divergence, whereas the sequences of ND1 had 17.7-34.1% intergeneric divergence. The interspecific divergence among members of Neopsilotrema was somewhat lower (0.2-0.5% in 28S; 0.3-0.4% in ITS; 12-15.7% in ND1). Our comparison of DNA sequences along with morphologic study suggests Holarctic distribution of N. lisitsynae.
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Affiliation(s)
- Tyler J Achatz
- Department of Biology, University of North Dakota, Starcher Hall, 10 Cornell Street Stop 9019, Grand Forks, North Dakota 58202
| | - Dana M Bennett
- Department of Biological Sciences, Minnesota State University Mankato, Trafton Science Center S, Mankato, Minnesota 56001
| | - Jakson R Martens
- Department of Biology, University of North Dakota, Starcher Hall, 10 Cornell Street Stop 9019, Grand Forks, North Dakota 58202
| | - Robert E Sorensen
- Department of Biological Sciences, Minnesota State University Mankato, Trafton Science Center S, Mankato, Minnesota 56001
| | - Roy G Nelson
- Department of Biology, University of North Dakota, Starcher Hall, 10 Cornell Street Stop 9019, Grand Forks, North Dakota 58202
| | - Kimberly M Bates
- Department of Biology, Winona State University, Pasteur Hall, Winona, Minnesota 55987
| | - Elena A Serbina
- Institute of Systematics and Ecology of Animals, Siberian Branch, Russian Academy of Sciences, 11 Frunze Street, 630091 Novosibirsk, Russia
| | - Vasyl V Tkach
- Department of Biology, University of North Dakota, Starcher Hall, 10 Cornell Street Stop 9019, Grand Forks, North Dakota 58202
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14
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González-García MT, Andrade-Gómez L, Pinacho-Pinacho CD, Sereno-Uribe AL, García-Varela M. Host-induced phenotypic plasticity in Saccocoelioides lamothei Aguirre-Macedo and Violante-González, 2008 (Digenea: Haploporidae) a parasite of freshwater, brackish and marine fishes from Middle America. Parasitology 2021; 148:519-531. [PMID: 33298206 PMCID: PMC10950380 DOI: 10.1017/s0031182020002334] [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: 10/22/2020] [Revised: 11/27/2020] [Accepted: 12/02/2020] [Indexed: 11/08/2022]
Abstract
Saccocoelioides is a genus of trematodes associated with fishes from the Americas. In the current research, morphologically distinct specimens of Saccocoelioides spp. were collected from six countries in Middle America. Specimens were sequenced using three molecular markers, the domains D1-D3 of the large subunit (LSU) from the nuclear rDNA, the cytochrome c oxidase subunit 1 (cox1) and nicotinamide adenine dinucleotide dehydrogenase subunit 1 (nad1) from mitochondrial DNA. A total of 74 new sequences were compared and aligned with other sequences available in GenBank. Maximum likelihood and Bayesian inference analyses were inferred from the LSU and cox1 datasets, revealing unequivocally that all the specimens correspond to S. lamothei. A haplotype network was built with 119 sequences of the nad1 gene. The network detected 57 distinct haplotypes divided into three haplogroups. To explore morphological differences among samples of S. lamothei, 17 morphological features were measured from 53 specimens from three fish families: Eleotridae, Mugilidae and Gobiidae. Principal component analysis yielded three main polygons that corresponded with each family analysed, suggesting host-induced phenotypic plasticity. The current evidence suggests that S. lamothei infects at least five fish families along the Pacific coasts of Mexico, Guatemala, El Salvador, Honduras, Nicaragua and Costa Rica.
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Affiliation(s)
- Marcelo Tonatiuh González-García
- Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Ciudad Universitaria, C.P. 04510, Ciudad de México, México
| | - Leopoldo Andrade-Gómez
- Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Ciudad Universitaria, C.P. 04510, Ciudad de México, México
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Ciudad Universitaria, C. P. 04510, Ciudad de México, México
| | - Carlos Daniel Pinacho-Pinacho
- Investigador Cátedras CONACyT, Instituto de Ecología, A.C., Red de Estudios Moleculares Avanzados, Km 2.5 Ant. Carretera a Coatepec, Xalapa, Veracruz91070, México
| | - Ana Lucia Sereno-Uribe
- Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Ciudad Universitaria, C.P. 04510, Ciudad de México, México
| | - Martín García-Varela
- Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Ciudad Universitaria, C.P. 04510, Ciudad de México, México
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15
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Nakao M, Sasaki M. Trematode diversity in freshwater snails from a stopover point for migratory waterfowls in Hokkaido, Japan: An assessment by molecular phylogenetic and population genetic analyses. Parasitol Int 2021; 83:102329. [PMID: 33753234 DOI: 10.1016/j.parint.2021.102329] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/02/2021] [Accepted: 03/07/2021] [Indexed: 11/26/2022]
Abstract
The cryptic diversity of trematodes was evaluated in the Nagayama-Shinkawa River, an artificial canal of the Ishikari River System of Hokkaido, Japan. Numerous migratory waterfowls use the canal as a stopover point in every spring season. The lymnaeid snail, Radix auricularia, and the semisulcospirid snail, Semisulcospira libertina, colonize the static and flowing water areas, respectively. The trematode fauna of the two snails was assessed by molecular phylogenetic and population genetic analyses. Each of distinctive clades in mitochondrial DNA trees was arbitrarily set as a species. In total, 14 species of the families Diplostomidae, Echinostomatidae, Notocotylidae, Plagiorchiidae, and Strigeidae occurred in R. auricularia, wherease S. libertina harbored 10 species of the families Echinochasmidae, Heterophyidae, Notocotylidae, and Lecithodendridae and Cercaria creta, an unclassified species whose adult stage is still unknown. The species diversity of the larval trematodes could be recognized as a "hot spot", suggesting that the seasonal visit of waterfowls is very important to spread trematodes and to keep their diversity. A high intraspecific genetic diversity was observed in the echinostomatid, notocotylid, echinochasmid, and heterophyid species, whose definitive hosts include birds. It seems likely that each of the parasite populations is always disturbed by repeated visits of waterfowls.
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Affiliation(s)
- Minoru Nakao
- Department of Parasitology, Asahikawa Medical University, Asahikawa, Hokkaido 078-8510, Japan.
| | - Mizuki Sasaki
- Department of Parasitology, Asahikawa Medical University, Asahikawa, Hokkaido 078-8510, Japan
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16
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Galaktionov KV, Solovyeva AI, Miroliubov A. Elucidation of Himasthla leptosoma (Creplin, 1829) Dietz, 1909 (Digenea, Himasthlidae) life cycle with insights into species composition of the north Atlantic Himasthla associated with periwinkles Littorina spp. Parasitol Res 2021; 120:1649-1668. [PMID: 33712931 DOI: 10.1007/s00436-021-07117-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 03/04/2021] [Indexed: 11/24/2022]
Abstract
Trematodes of the genus Himasthla are usual parasites of coastal birds in nearshore ecosystems of northern European seas and the Atlantic coast of North America. Their first intermediate hosts are marine and brackish-water gastropods, while second intermediate hosts are various invertebrates. We analysed sequences of partial 28S rRNA and nad1 genes and the morphology of intramolluscan stages, particularly cercariae of Himasthla spp. parasitizing intertidal molluscs Littorina spp. in the White Sea, the Barents Sea and coasts of North Norway and Iceland. We showed that only three Himasthla spp. are associated with periwinkles in these regions. Intramolluscan stages of H. elongata were found in Littorina littorea, of H. littorinae, in both L. saxatilis and L. obtusata, and of Cercaria littorinae obtusatae, predominantly, in L. obtusata. Other Himasthla spp. previously reported from Littorina spp. in North Atlantic are either synonymous with one of these species or described erroneously. Based on a comparison of newly generated 28S rDNA sequences with GenBank data, rediae and cercariae of C. littorinae obtusatae were identified as belonging to H. leptosoma. Some previously unknown morphological features of young and mature rediae and cercariae of the three Himasthla spp. are described. We provide a key to the rediae and highlight characters important for identification of cercariae. Genetic diversity within the studied species was only partially determined by their specificity to the molluscan host. The nad1 network constructed for H. leptosoma lacked geographical structure, which is explained by a high gene flow owing to highly vagile definitive hosts, shorebirds.
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Affiliation(s)
- Kirill V Galaktionov
- Laboratory of Parasitic Worms and Protists, Zoological Institute of Russian Academy of Sciences, St. Petersburg, 199034, Russia.
| | - Anna I Solovyeva
- Laboratory of Parasitic Worms and Protists, Zoological Institute of Russian Academy of Sciences, St. Petersburg, 199034, Russia.,Laboratory of Non-Coding DNA, Institute of Cytology of Russian Academy of Sciences, St. Petersburg, 194064, Russia
| | - Alexei Miroliubov
- Laboratory of Parasitic Worms and Protists, Zoological Institute of Russian Academy of Sciences, St. Petersburg, 199034, Russia
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17
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Nguyen PTX, Van Hoang H, Dinh HTK, Dorny P, Losson B, Bui DT, Lempereur L. Insights on foodborne zoonotic trematodes in freshwater snails in North and Central Vietnam. Parasitol Res 2021; 120:949-962. [PMID: 33426572 DOI: 10.1007/s00436-020-07027-1] [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: 08/07/2020] [Accepted: 12/20/2020] [Indexed: 01/22/2023]
Abstract
Foodborne zoonotic trematode (FZT) infections are common neglected tropical diseases in Southeast Asia. Their complicated life cycles involve freshwater snails as intermediate hosts. A cross-sectional study was conducted in Yen Bai and Thanh Hoa provinces in North and Central Vietnam, to investigate the diversity of cercariae of potential FZT and to construct the phylogenetic relationship of trematode cercariae based on the Internal Transcribed Spacer 2 (ITS2) region. Among 17 snail species collected from various habitats, 13 were infected by 10 cercarial groups among which parapleurolophocercous, pleurolophocercous, and echinostome cercariae were of zoonotic importance. The monophyletic tree separated cercarial sequences into different groups following the description of the cercariae families in which Haplorchidae, Opisthorchiidae, Echinochasmidae, and Echinostomatidae are important families of FZT. The overall prevalence was different among snail species and habitats and showed a seasonal trend. Parapleurolophocercous and echinostome cercariae emerged as the most common cercariae in snails in Yen Bai, while monostome, echinostome, and megalura cercariae were most common in Thanh Hoa. Using a molecular approach, we identified Parafossarulus striatulus as the first intermediate snail host of Clonorchis sinensis in Thac Ba Lake. Melanoides tuberculata and Bithynia fuchsiana were we identified preferred intermediate snail hosts of a diverse range of trematode species including intestinal flukes (i.e., Haplorchis pumilio and Echinochasmus japonicus) in Yen Bai and Thanh Hoa, respectively.
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Affiliation(s)
- Phuong Thi Xuan Nguyen
- Laboratory of Parasitology and Parasitic Diseases, Center for Fundamental and Applied Research for Animal and Health (FARAH), Faculty of Veterinary Medicine, ULiège, Boulevard de Colonster 20, 4000, Liège, Belgium.,Institute of Ecology and Biological Resources, Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam
| | - Hien Van Hoang
- Institute of Ecology and Biological Resources, Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam
| | - Huyen Thi Khanh Dinh
- Institute of Ecology and Biological Resources, Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam
| | - Pierre Dorny
- Department of Biomedical Sciences, Institute of Tropical Medicine Antwerp, Nationalestraat 155, 2000, Antwerpen, Belgium
| | - Bertrand Losson
- Laboratory of Parasitology and Parasitic Diseases, Center for Fundamental and Applied Research for Animal and Health (FARAH), Faculty of Veterinary Medicine, ULiège, Boulevard de Colonster 20, 4000, Liège, Belgium
| | - Dung Thi Bui
- Institute of Ecology and Biological Resources, Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam. .,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam.
| | - Laetitia Lempereur
- Laboratory of Parasitology and Parasitic Diseases, Center for Fundamental and Applied Research for Animal and Health (FARAH), Faculty of Veterinary Medicine, ULiège, Boulevard de Colonster 20, 4000, Liège, Belgium
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18
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Butboonchoo P, Wongsawad C, Wongsawad P, Chai JY. Morphology and Molecular Identification of Echinostoma revolutum and Echinostoma macrorchis in Freshwater Snails and Experimental Hamsters in Upper Northern Thailand. THE KOREAN JOURNAL OF PARASITOLOGY 2020; 58:499-511. [PMID: 33202502 PMCID: PMC7672236 DOI: 10.3347/kjp.2020.58.5.499] [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: 05/19/2020] [Accepted: 09/22/2020] [Indexed: 11/23/2022]
Abstract
Echinostome metacercariae were investigated in freshwater snails from 26 districts in 7 provinces of upper northern Thailand. The species identification was carried out based on the morphologies of the metacercariae and adult flukes harvested from experimental hamsters, and on nucleotide sequences of internal transcribed spacer 2 (ITS2) and nicotinamide adenine dinucleotide dehydrogenase subunit 1 (nad1) genes. Twenty-four out of 26 districts were found to be infected with echinostome metacercariae in freshwater snails with the prevalence of 40.4%. The metacercariae were found in all 6 species of snails, including Filopaludina martensi martensi (21.9%), Filopaludina doliaris (50.8%), F. sumatrensis polygramma (61.3%), Bithynia siamensis siamensis (14.5%), Bithynia pulchella (38.0%), and Anenthome helena (4.9%). The echinostome metacercariae found in these snails were identified as Echinostoma revolutum (37-collar-spined) and Echinostoma macrorchis (45-collar-spined) morphologically and molecularly. The 2-week-old adult flukes of E. revolutum revealed unique features of the cirrus sac extending to middle of the ventral sucker and smooth testes. E. macrorchis adults revealed the cirrus sac close to the right lateral margin of the ventral sucker and 2 large and elliptical testes with slight indentations and pointed posterior end of the posterior testis. The ITS2 and nad1 sequences confirmed the species identification of E. revolutum, and the sequences of E. macrorchis have been deposited for the first time in GenBank. The presence of the life cycle of E. macrorchis is a new record in Thailand and the snail F. doliaris as their second intermediate host seems to be new among the literature.
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Affiliation(s)
- Preeyaporn Butboonchoo
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.,Research Center in Bioresources for Agriculture, Industry and Medicine, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Chalobol Wongsawad
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.,Research Center in Bioresources for Agriculture, Industry and Medicine, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Pheravut Wongsawad
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.,Research Center in Bioresources for Agriculture, Industry and Medicine, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.,Economic Plant Genome Service Centre, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Jong-Yil Chai
- Department of Tropical Medicine and Parasitology, Seoul National University College of Medicine, Seoul 03080, Korea.,Institute of Parasitic Diseases, Korea Association of Health Promotion (KAHP), Seoul 07649, Korea
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19
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Biswas PG, Ohari Y, Mohanta UK, Itagaki T. Molecular characterization of Oxyspirura mansoni and Philophthalmus gralli collected from the eyes of domestic chickens in Bangladesh. Parasitol Int 2020; 80:102243. [PMID: 33186725 DOI: 10.1016/j.parint.2020.102243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 10/24/2020] [Accepted: 11/06/2020] [Indexed: 11/25/2022]
Abstract
A variety of helminths have been found in domestic chickens in Bangladesh, but little is known about their gene sequences. Here, parasitic nematodes and trematodes were collected from the eyes of domestic chickens and analyzed for their morphological and morphometric characteristics, and characterized molecularly. The helminths were identified as Oxyspirura mansoni and Philophthalmus gralli. The ITS1 and ITS2 sequences of O. mansoni were 532 bp and 306 bp in length, respectively, and showed low identity (50.7-62.7%) with those of O. petrowi and O. conjunctivalis. Furthermore, the O. mansoni CO1 sequences (393 bp) showed five haplotypes (97.5-99.5% similarity) that formed a monophyletic clade. With respect to P. gralli, the ITS1 (452 bp) and ITS2 (736 bp) sequences showed 100% similarity with the reference sequences in GenBank. Both the ND1 and CO1 phylograms showed that P. gralli from Bangladesh, Costa Rica and Peru form a monophyletic clade, distinct from the clades of P. lucipetus and P. lacrymosus. Our data show that, Philophthalmus gralli isolates from Bangladesh, Costa Rica and Peru are genetically close to each other.
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Affiliation(s)
- Peru Gopal Biswas
- Laboratory of Veterinary Parasitology, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka 020-8550, Japan; Department of Pathogenetic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Yuma Ohari
- National Research Center for Protozoan Diseases, Obihiro University of Agricultural and Veterinary Medicine, Japan
| | - Uday Kumar Mohanta
- Department of Microbiology and Parasitology, Sher-E-Bangla Agricultural University, Dhaka, Bangladesh
| | - Tadashi Itagaki
- Laboratory of Veterinary Parasitology, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka 020-8550, Japan; Department of Pathogenetic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
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Cho J, Jung BK, Chang T, Sohn WM, Sinuon M, Chai JY. Echinostoma mekongi n. sp. (Digenea: Echinostomatidae) from Riparian People along the Mekong River in Cambodia. THE KOREAN JOURNAL OF PARASITOLOGY 2020; 58:431-443. [PMID: 32871637 PMCID: PMC7462798 DOI: 10.3347/kjp.2020.58.4.431] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 07/29/2020] [Accepted: 07/29/2021] [Indexed: 11/23/2022]
Abstract
Echinostoma mekongi n. sp. (Digenea: Echinostomatidae) is described based on adult flukes collected from humans residing along the Mekong River in Cambodia. Total 256 flukes were collected from the diarrheic stool of 6 echinostome egg positive villagers in Kratie and Takeo Province after praziquantel treatment and purging. Adults of the new species were 9.0-13.1 (av. 11.3) mm in length and 1.3-2.5 (1.9) mm in maximum width and characterized by having a head collar armed with 37 collar spines (dorsal spines arranged in 2 alternative rows), including 5 end group spines. The eggs in feces and worm uterus were 98-132 (117) μm long and 62-90 (75) μm wide. These morphological features closely resembled those of Echinostoma revolutum, E. miyagawai, and several other 37-collar-spined Echinostoma species. However, sequencing of the nuclear ITS (ITS1-5.8S rRNA-ITS2) and 2 mitochondrial genes, cox1 and </>nad1, revealed unique features distinct from E. revolutum and also from other 37-collar-spined Echinostoma group available in GenBank (E. bolschewense, E. caproni, E. cinetorchis, E. deserticum, E. miyagawai, E. nasincovae, E. novaezealandense, E. paraensei, E. paraulum, E. robustum, E. trivolvis, and Echinostoma sp. IG). Thus, we assigned our flukes as a new species, E. mekongi. The new species revealed marked variation in the morphology of testes (globular or lobulated), and smaller head collar, collar spines, oral and ventral suckers, and cirrus sac compared to E. revolutum and E. miyagawai. Epidemiological studies regarding the geographical distribution and its life history, including the source of human infections, remain to be performed.
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Affiliation(s)
- Jaeeun Cho
- Institute of Parasitic Diseases, Korea Association of Health Promotion, Seoul 07649, Korea
| | - Bong-Kwang Jung
- Institute of Parasitic Diseases, Korea Association of Health Promotion, Seoul 07649, Korea
| | - Taehee Chang
- Institute of Parasitic Diseases, Korea Association of Health Promotion, Seoul 07649, Korea
| | - Woon-Mok Sohn
- Department of Parasitology and Tropical Medicine, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju 52727, Korea
| | - Muth Sinuon
- National Center for Parasitology, Entomology and Malaria Control, Phnom Penh, Cambodia
| | - Jong-Yil Chai
- Institute of Parasitic Diseases, Korea Association of Health Promotion, Seoul 07649, Korea
- Department of Tropical Medicine and Parasitology, Seoul National University College of Medicine, Seoul 03080, Korea
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Chai JY, Cho J, Chang T, Jung BK, Sohn WM. Taxonomy of Echinostoma revolutum and 37-Collar-Spined Echinostoma spp.: A Historical Review. THE KOREAN JOURNAL OF PARASITOLOGY 2020; 58:343-371. [PMID: 32871630 PMCID: PMC7462802 DOI: 10.3347/kjp.2020.58.4.343] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 07/29/2020] [Accepted: 07/29/2020] [Indexed: 12/16/2022]
Abstract
Echinostoma flukes armed with 37 collar spines on their head collar are called as 37-collar-spined Echinostoma spp. (group) or 'Echinostoma revolutum group'. At least 56 nominal species have been described in this group. However, many of them were morphologically close to and difficult to distinguish from the other, thus synonymized with the others. However, some of the synonymies were disagreed by other researchers, and taxonomic debates have been continued. Fortunately, recent development of molecular techniques, in particular, sequencing of the mitochondrial (nad1 and cox1) and nuclear genes (ITS region; ITS1-5.8S-ITS2), has enabled us to obtain highly useful data on phylogenetic relationships of these 37-collar-spined Echinostoma spp. Thus, 16 different species are currently acknowledged to be valid worldwide, which include E. revolutum, E. bolschewense, E. caproni, E. cinetorchis, E. deserticum, E. lindoense, E. luisreyi, E. mekongi, E. miyagawai, E. nasincovae, E. novaezealandense, E. paraensei, E. paraulum, E. robustum, E. trivolvis, and Echinostoma sp. IG of Georgieva et al., 2013. The validity of the other 10 species is retained until further evaluation, including molecular analyses; E. acuticauda, E. barbosai, E. chloephagae, E. echinatum, E. jurini, E. nudicaudatum, E. parvocirrus, E. pinnicaudatum, E. ralli, and E. rodriguesi. In this review, the history of discovery and taxonomic debates on these 26 valid or validity-retained species are briefly reviewed.
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Affiliation(s)
- Jong-Yil Chai
- Institute of Parasitic Diseases, Korea Association of Health Promotion, Seoul 07649, Korea
- Department of Tropical Medicine and Parasitology, Seoul National University College of Medicine, Seoul 03080, Korea
| | - Jaeeun Cho
- Institute of Parasitic Diseases, Korea Association of Health Promotion, Seoul 07649, Korea
| | - Taehee Chang
- Institute of Parasitic Diseases, Korea Association of Health Promotion, Seoul 07649, Korea
| | - Bong-Kwang Jung
- Institute of Parasitic Diseases, Korea Association of Health Promotion, Seoul 07649, Korea
| | - Woon-Mok Sohn
- Department of Parasitology and Tropical Medicine, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju 52727, Korea
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Timing and order of exposure to two echinostome species affect patterns of infection in larval amphibians. Parasitology 2020; 147:1515-1523. [PMID: 32660661 DOI: 10.1017/s0031182020001092] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The study of priority effects with respect to coinfections is still in its infancy. Moreover, existing coinfection studies typically focus on infection outcomes associated with exposure to distinct sets of parasite species, despite that functionally and morphologically similar parasite species commonly coexist in nature. Therefore, it is important to understand how interactions between similar parasites influence infection outcomes. Surveys at seven ponds in northwest Pennsylvania found that multiple species of echinostomes commonly co-occur. Using a larval anuran host (Rana pipiens) and the two most commonly identified echinostome species from our field surveys (Echinostoma trivolvis and Echinoparyphium lineage 3), we examined how species composition and timing of exposure affect patterns of infection. When tadpoles were exposed to both parasites simultaneously, infection loads were higher than when exposed to Echinoparyphium alone but similar to being exposed to Echinostoma alone. When tadpoles were sequentially exposed to the parasite species, tadpoles first exposed to Echinoparyphium had 23% lower infection loads than tadpoles first exposed to Echinostoma. These findings demonstrate that exposure timing and order, even with similar parasites, can influence coinfection outcomes, and emphasize the importance of using molecular methods to identify parasites for ecological studies.
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Intron sequence variation of the echinostomes (Trematoda; Echinostomatidae): implications for genetic investigations of the 37 collar-spined, Echinostoma miyagawai Ischii, 1932 and E. revolutum (Fröelich, 1802). Parasitol Res 2020; 119:2485-2494. [DOI: 10.1007/s00436-020-06734-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 05/25/2020] [Indexed: 01/09/2023]
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Gilardoni C, Etchegoin J, Cribb T, Pina S, Rodrigues P, Diez ME, Cremonte F. Cryptic speciation of the zoogonid digenean Diphterostomum flavum n. sp. demonstrated by morphological and molecular data. Parasite 2020; 27:44. [PMID: 32553099 PMCID: PMC7301638 DOI: 10.1051/parasite/2020040] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 05/23/2020] [Indexed: 11/20/2022] Open
Abstract
Diphterostomum brusinae (Zoogonidae) is a digenean species that has been recorded worldwide parasitizing marine fishes. Several species have been synonymized with D. brusinae because they lack conspicuous morphological differences. However, due to the breadth of its geographic distribution and the variety of hosts involved in the life cycles, it is likely to be an assemblage of cryptic species. Diphterostomum flavum n. sp. is described here as a morphologically cryptic relative of D. brusinae, in the fish Pinguipes brasilianus (Pinguipedidae) off the Patagonian coast, Southwestern Atlantic Ocean, and its life cycle is elucidated through morphology and molecular analysis. This species uses the gastropod Buccinanops deformis (Nassariidae) as first and second intermediate host with metacercariae encysting within sporocysts. They also, however, use the polychaete Kinbergonuphis dorsalis (Onuphidae) as second intermediate host. No morphological differences were found between adults of D. flavum n. sp. and D. brusinae; however, the number of penetration glands of the cercariae, a diagnostic feature, differed (9 vs. 3 pairs), as well as the ITS2 sequences for the two species. This work provides morphological and molecular evidence of cryptic diversification among species described as D. brusinae, in which the only clear differences are in larval morphology and host spectrum. The strict specificity to the snail acting as the first intermediate host and the variety of fishes with different feeding habits acting as definitive hosts support the likely existence of multiple cryptic species around the world.
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Affiliation(s)
- Carmen Gilardoni
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Laboratorio de Parasitología, Instituto de Biología de Organismos Marinos (CCT CONICET-CENPAT) Boulevard Brown 2915 U9120ACF Puerto Madryn Argentina
| | - Jorge Etchegoin
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Laboratorio de Parasitología, IIPROSAM – Instituto de Investigaciones en Producción Sanidad y Ambiente, FCEyN, Universidad Nacional de Mar del Plata – CONICET Juan B. Justo 2550 7600 Mar del Plata Argentina
| | - Thomas Cribb
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School of Biological Sciences, The University of Queensland Brisbane 4072 Queensland Australia
| | - Susana Pina
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Laboratorio de Sanidade, ICBAS – Instituto de Ciencias Biomédicas Abel Salazar, Universidade do Porto R. Jorge de Viterbo Ferreira 228 4050-313 Porto Portugal
| | - Pedro Rodrigues
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Laboratorio de Sanidade, ICBAS – Instituto de Ciencias Biomédicas Abel Salazar, Universidade do Porto R. Jorge de Viterbo Ferreira 228 4050-313 Porto Portugal
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Laboratorio de Imunidade Inata e Ferro, I3S – Instituto de Investigação e Inovação em Saúde, Universidade do Porto R. Alfredo Allen 4200-135 Porto Portugal
| | - María Emilia Diez
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Laboratorio de Parasitología, Instituto de Biología de Organismos Marinos (CCT CONICET-CENPAT) Boulevard Brown 2915 U9120ACF Puerto Madryn Argentina
| | - Florencia Cremonte
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Laboratorio de Parasitología, Instituto de Biología de Organismos Marinos (CCT CONICET-CENPAT) Boulevard Brown 2915 U9120ACF Puerto Madryn Argentina
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Multiplex PCR development for the differential detection of four medically important echinostomes (Trematoda: Echinostomatidae) in Thailand. Acta Trop 2020; 204:105304. [PMID: 31857082 DOI: 10.1016/j.actatropica.2019.105304] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 12/13/2019] [Accepted: 12/15/2019] [Indexed: 01/20/2023]
Abstract
Four species of echinostomes, Echinostoma revolutum (Froelich, 1802), Echinostoma ilocanum (Garrison, 1908), Hypoderaeum conoideum (Bloch, 1872) Dietz, 1909, and Artyfechinostomum malayanum (Leiper, 1911) Mendheim, 1943 commonly infect humans in Thailand, but their eggs present similar morphologies resulting in difficult differentiation for diagnosis. Present molecular methods have a great potential to provide superior detection/diagnosis. DNA sequences, especially the mitochondrial NADH dehydrogenase subunit 1 (ND1) gene, have already been used to differentiate among echinostomes; thus, we aimed to develop species-specific primers for the differential detection of four medically important echinostomes by multiplex PCR. The species-specific reverse primers and a forward primer were based on variable regions and conserved regions of the ND1 gene, respectively. Four reverse primers and a forward primer were combined in a multiplex PCR reaction to amplify the ND1 fragment. Different ND1 fragment sizes were amplified: 108, 209, 384 and 419 bp of E. revolutum H. conoideum, E. ilocanum and A. malayanum, respectively. Specificity was tested with other medically important parasite DNA; no cross-reaction occurred. Sensitivity ranged between 0.1 and 0.05 ng. The species-specific primers developed in this study could be of further use in differential diagnosis for these medically important echinostomes infection in human and animal hosts.
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Mohanta UK, Watanabe T, Anisuzzaman, Ohari Y, Itagaki T. A rebuttal letter to Letter to the Editor by P. Heneberg on “Taxonomic comments on the validity of Echinostoma miyagawai Ishii, 1932 (Trematoda: Echinostomatidae)”. Parasitol Int 2020; 74:101971. [DOI: 10.1016/j.parint.2019.101971] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 07/29/2019] [Accepted: 08/03/2019] [Indexed: 11/28/2022]
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High parasite diversity in a neglected host: larval trematodes of Bithynia tentaculata in Central Europe. J Helminthol 2020; 94:e120. [PMID: 31984933 DOI: 10.1017/s0022149x19001093] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Bithynids snails are a widespread group of molluscs in European freshwater systems. However, not much information is available on trematode communities from molluscs of this family. Here, we investigate the trematode diversity of Bithynia tentaculata, based on molecular and morphological data. A total of 682 snails from the rivers Lippe and Rhine in North Rhine-Westphalia, Germany, and 121 B. tentaculata from Curonian Lagoon, Lithuania were screened for infections with digeneans. In total, B. tentaculata showed a trematode prevalence of 12.9% and 14%, respectively. The phylogenetic analyses based on 55 novel sequences for 36 isolates demonstrated a high diversity of digeneans. Analyses of the molecular and morphological data revealed a species-rich trematode fauna, comprising 20 species, belonging to ten families. Interestingly, the larval trematode community of B. tentaculata shows little overlap with the well-studied trematode fauna of lymnaeids and planorbids, and some of the detected species (Echinochasmus beleocephalus and E. coaxatus) constitute first records for B. tentaculata in Central Europe. Our study revealed an abundant, diverse and distinct trematode fauna in B. tentaculata, which highlights the need for further research on this so far understudied host-parasite system. Therefore, we might currently be underestimating the ecological roles of several parasite communities of non-pulmonate snail host families in European fresh waters.
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Fu YT, Jin YC, Li F, Liu GH. Characterization of the complete mitochondrial genome of the echinostome Echinostoma miyagawai and phylogenetic implications. Parasitol Res 2019; 118:3091-3097. [PMID: 31418114 DOI: 10.1007/s00436-019-06417-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 08/02/2019] [Indexed: 10/26/2022]
Abstract
Echinostomes are important intestinal foodborne parasites. Despite their significance as pathogens, characterization of the molecular biology and phylogenetics of these parasites are limited. In the present study, we determined the entire mitochondrial (mt) genome of the echinostome Echinostoma miyagawai (Hunan isolate) and examined the phylogenetic relationship with selected members of the suborder Echinostomata. The complete mt genome of E. miyagawai (Hunan isolate) was 14,468 bp in size. This circular mt genome contained 12 protein-coding genes, 22 transfer RNA genes, two ribosomal RNA genes, and one non-coding region. The gene order and genomic content were identical with its congeners. Phylogenetic analyses (maximum parsimony, maximum likelihood, and Bayesian inference) based on the concatenated amino acid sequences of 12 protein-coding genes strongly supported monophyly for the genus Echinostoma; however, they rejected monophyly for the family Echinostomatidae and the genus Fasciola. The mt genomic data described in this study provides useful genetic markers for studying the population genetics, molecular biology, and phylogenetics of these echinostomes.
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Affiliation(s)
- Yi-Tian Fu
- Hunan Provincial Key Laboratory of Protein Engineering in Animal Vaccines, College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, Hunan Province, China
| | - Yuan-Chun Jin
- Hunan Provincial Key Laboratory of Protein Engineering in Animal Vaccines, College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, Hunan Province, China
| | - Fen Li
- Hunan Provincial Key Laboratory of Protein Engineering in Animal Vaccines, College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, Hunan Province, China. .,Hunan Co-Innovation Center of Animal Production Safety, Changsha, 410128, Hunan Province, China.
| | - Guo-Hua Liu
- Hunan Provincial Key Laboratory of Protein Engineering in Animal Vaccines, College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, Hunan Province, China. .,Hunan Co-Innovation Center of Animal Production Safety, Changsha, 410128, Hunan Province, China.
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Buddhachat K, Chontananarth T. Is species identification of Echinostoma revolutum using mitochondrial DNA barcoding feasible with high-resolution melting analysis? Parasitol Res 2019; 118:1799-1810. [PMID: 31028468 DOI: 10.1007/s00436-019-06322-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 04/09/2019] [Indexed: 01/22/2023]
Abstract
The taxonomic evaluation of Echinostoma species is controversial. Echinostoma species are recognized as complex, leading to problems associated with accurate identification of these species. The aim of this study was to test the feasibility of using DNA barcoding of cytochrome c oxidase subunit I (COI) and NADH dehydrogenase subunit 1 (ND1) conjugated with high-resolution melting (HRM) analysis to identify Echinostoma revolutum. HRM using COI and ND1 was unable to differentiate between species in the "revolutum complex" but did distinguish between two isolates of 37-collar-spined echinostome species, including E. revolutum (Asian lineage) and Echinostoma sp. A from different genera, e.g., Hypoderaeum conoideum, Haplorchoides mehrai, Fasciola gigantica, and Thapariella anastomusa, based on the Tm values derived from HRM analysis. Through phylogenetic analysis, a new clade of the cryptic species known as Echinostoma sp. A was identified. In addition, we found that the E. revolutum clade of ND1 phylogeny obtained from the Thailand strain was from a different lineage than the Eurasian lineage. These findings reveal the complexity of the clade, which is composed of 37-collar-spined echinostome species found in Southeast Asia. Taken together, the systematic aspects of the complex revolutum group are in need of extensive investigation by integrating morphological, biological, and molecular features in order to clarify them, particularly in Southeast Asia.
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Affiliation(s)
- Kittisak Buddhachat
- Department of Biology, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand.,Excellence Center in Veterinary Biosciences, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Thapana Chontananarth
- Applied Parasitology Research Laboratory, Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand. .,Center of Excellence in Animal, Plant and Parasite Biotechnology, Srinakharinwirot University, Bangkok, 10110, Thailand.
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Hildebrand J, Pyrka E, Sitko J, Jeżewski W, Zaleśny G, Tkach VV, Laskowski Z. Molecular phylogeny provides new insights on the taxonomy and composition of Lyperosomum Looss, 1899 (Digenea, Dicrocoeliidae) and related genera. INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE 2019; 9:90-99. [PMID: 31011531 PMCID: PMC6463552 DOI: 10.1016/j.ijppaw.2019.03.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/25/2019] [Accepted: 03/25/2019] [Indexed: 12/01/2022]
Abstract
Lyperosomum Looss, 1899 is one of the largest genera of the Dicrocoeliidae and is one of the best examples of the systematic complexity and taxonomic instability within this family. We present the molecular analyses based on novel sequences of nuclear and mitochondrial genes obtained from 56 isolates of adult flukes and larval stages of dicrocoeliids belonging to Lyperosomum, Skrjabinus, Zonorchis as well as previously available sequence data. According to obtained results we propose to return Zonorchis clathratus and Z. petiolatus into Lyperosomum, and to recognize L. alagesi as a synonym of L. petiolatum. Our study shows that L. petiolatum commonly occurs in Europe in corvids as well as in several species of migratory songbirds, e.g. Sylvia atricapilla. At the same time, the Turdidae appear to host a distinct species of Lyperosomum. The phylogenetic analysis has clearly demonstrated the paraphylepic nature of Lyperosomum and indicated the need of its thorough revision preferably using specimens from type hosts and type territories of nominal species. In addition, inclusion of numerous not yet sequenced dicrocoeliid genera into future phylogenetic studies is necessary to clarify the interrelationships of taxa within the family and stabilize its system.
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Affiliation(s)
- Joanna Hildebrand
- Department of Parasitology, Institute of Genetics and Microbiology, University of Wrocław, Przybyszewskiego 63, 51-148, Wrocław, Poland
| | - Ewa Pyrka
- Department of Parasitology, Institute of Genetics and Microbiology, University of Wrocław, Przybyszewskiego 63, 51-148, Wrocław, Poland
| | - Jiljí Sitko
- Comenius Museum, Horní námĕsti 7, 750 11, Přerov, Czech Republic
| | - Witold Jeżewski
- Institute of Parasitology, Polish Academy of Science, Twarda 51/55, 00-818, Warszawa, Poland
| | - Grzegorz Zaleśny
- Department of Systematic and Ecology of Invertebrates, Institute of Biology, Wrocław University of Environmental and Life Sciences, Kożuchowska 5b, 51-631, Wrocław, Poland
| | - Vasyl V Tkach
- Department of Biology, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Zdzisław Laskowski
- Institute of Parasitology, Polish Academy of Science, Twarda 51/55, 00-818, Warszawa, Poland
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Gordy MA, Hanington PC. A fine-scale phylogenetic assessment of digenean trematodes in central Alberta reveals we have yet to uncover their total diversity. Ecol Evol 2019; 9:3153-3238. [PMID: 30962888 PMCID: PMC6434566 DOI: 10.1002/ece3.4939] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 12/17/2018] [Accepted: 12/27/2018] [Indexed: 01/08/2023] Open
Abstract
Despite over 100 years of digenean trematode parasite species descriptions, from a wide diversity of vertebrate and invertebrate host species, our ability to recognize the diversity of trematode species within a single lake remains an incredible challenge. The most challenging aspect is the identification of species from larval stages derived from intermediate hosts, due to the disjointed data of adult worm morphological descriptions, from which species are named, and links to corresponding molecular identifiers in depauperate databases. Cryptic species also play a significant role in the challenge of linking trematode larvae to adults, species identifications, and estimating diversity. Herein, we utilize a large, longitudinal dataset of snail first-intermediate host infection data from lakes in Alberta, Canada, to infer trematode larval diversity using molecular phylogenetics and snail host associations. From our assessments, we uncover a diversity of 79 larval trematode species among just five snail host species. Only 14 species were identified to a previously described species, while the other 65 species are either cryptic or otherwise unrepresented by mitochondrial genes in GenBank. This study currently represents the largest and most diverse singular molecular survey of trematode larval fauna composed of over one thousand mitochondrial sequences. Surprisingly, rarefaction analyses indicate we have yet to capture the complete diversity of trematodes from our sampling area.
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Anucherngchai S, Chontananarth T, Tejangkura T, Chai JY. The study of Cytochrome B ( CYTB): species-specific detection and phylogenetic relationship of Echinostoma revolutum, (Froelich, 1802). J Parasit Dis 2019; 43:66-74. [PMID: 30956448 PMCID: PMC6423160 DOI: 10.1007/s12639-018-1057-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Accepted: 11/15/2018] [Indexed: 01/16/2023] Open
Abstract
Echinostoma revolutum is known as a significant intestinal trematode in various species of animals and humans. It presents complexities in terms of both the morphological and molecular biological data. This is the first study of the application of Cytochrome B gene (CYTB) as a target for studying the phylogeny and designing species-specific primer of E. revolutum. Adult trematodes were harvested from experimentally infected hamsters at 18 days of post-infection. Each worm was identified based on their morphological appearance. The novel CYTB primers were designed from other Echinostoma species to initially amplify CYTB region in E. revolutum. All sequence data of E. revolutum in five provinces of Central Thailand were used as the target for designing the species-specific primer for E. revolutum. The results revealed that CYTB gene can separate E. revolutum into two sister groups by geographical distribution, comprising the eastern and western area groups. Moreover, it also separates E. revolutum from other Echinostoma species, including two sibling species; E. caproni and E. paraensei. In addition, we developed the high performance species-specific primer of E. revolutum. It can detect DNA from a single egg, as well as cercaria, metacercaria and adult stages of this trematode with no cross-reactions to other trematodes and their hosts. Therefore, this research is a positive initial step for the future study of E. revolutum CYTB. The future studies based on this gene should be continued with all species in revolutum complex to overcome the problems of systemic classification that arise in this complex group.
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Affiliation(s)
- Sothorn Anucherngchai
- Applied Parasitology Research Laboratory, Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok, Thailand
| | - Thapana Chontananarth
- Applied Parasitology Research Laboratory, Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok, Thailand
- Center of Excellence in Animal, Plant and Parasitic Biotechnology, Srinakharinwirot University, Bangkok, Thailand
| | - Thanawan Tejangkura
- Applied Parasitology Research Laboratory, Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok, Thailand
- Center of Excellence in Animal, Plant and Parasitic Biotechnology, Srinakharinwirot University, Bangkok, Thailand
| | - Jong-Yil Chai
- Korean Association of Health Promotion, Seoul, South Korea
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Sotillo J, Pearson MS, Loukas A. Trematode Genomics and Proteomics. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1154:411-436. [PMID: 31297769 DOI: 10.1007/978-3-030-18616-6_13] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Trematode infections are among the most neglected tropical diseases despite their worldwide distribution and extraordinary ability to parasitise many different host species and host tissues. Furthermore, these parasites are of great socioeconomic, medical, veterinary and agricultural importance. During the last 10 years, there have been increasing efforts to overcome the lack of information on different "omic" resources such as proteomics and genomics. Herein, we focus on the recent advances in genomics and proteomics from trematodes of human importance, including liver, blood, intestinal and lung flukes. We also provide information on the latest technologies applied to study the biology of trematodes as well as on the resources available for the study of the molecular aspects of this group of helminths.
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Affiliation(s)
- Javier Sotillo
- Centre for Molecular Therapeutics, Australian Institute for Tropical Health and Medicine, James Cook University, Cairns, QLD, Australia.
| | - Mark S Pearson
- Centre for Molecular Therapeutics, Australian Institute for Tropical Health and Medicine, James Cook University, Cairns, QLD, Australia
| | - Alex Loukas
- Centre for Molecular Therapeutics, Australian Institute for Tropical Health and Medicine, James Cook University, Cairns, QLD, Australia
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Mohanta UK, Watanabe T, Anisuzzaman, Ohari Y, Itagaki T. Characterization of Echinostoma revolutum and Echinostoma robustum from ducks in Bangladesh based on morphology, nuclear ribosomal ITS2 and mitochondrial nad1 sequences. Parasitol Int 2018; 69:1-7. [PMID: 30445199 DOI: 10.1016/j.parint.2018.11.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 05/23/2018] [Accepted: 11/11/2018] [Indexed: 11/24/2022]
Abstract
Precise discrimination of Echinostoma species within the 'revolutum' group is quite difficult because of their morphological similarities. The objective of this study was to precisely characterize the echinostomes of ducks from Bangladesh based on both morphological and molecular characteristics. Two Echinostoma species were identified: E. revolutum and E. robustum. In the phylogenetic trees (ITS2 and nad1), E. revolutum and E. robustum belonged to their respective Eurasian clade, which is distinct from the American clade. These results suggest that both species have two distinct and geographically separated lineages, Eurasian and American. Our molecular and morphological data combined with previously published data supports the synonymy of E. robustum, E. miyagawai, and E. friedi previously based on either molecular or morphological evidence. This study thus improves our understanding of species diversity of the 'revolutum' group, particularly in Asia.
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Affiliation(s)
- Uday Kumar Mohanta
- Laboratory of Veterinary Parasitology, Faculty of Agriculture, Iwate University, Ueda, 3-18-8, Morioka 020-8550, Japan; Department of Pathogenic Veterinary Science, United Graduate School of Veterinary Science, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan
| | - Takuya Watanabe
- Laboratory of Veterinary Parasitology, Faculty of Agriculture, Iwate University, Ueda, 3-18-8, Morioka 020-8550, Japan
| | - Anisuzzaman
- Department of Parasitology, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
| | - Yuma Ohari
- Laboratory of Veterinary Parasitology, Faculty of Agriculture, Iwate University, Ueda, 3-18-8, Morioka 020-8550, Japan; Department of Pathogenic Veterinary Science, United Graduate School of Veterinary Science, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan
| | - Tadashi Itagaki
- Laboratory of Veterinary Parasitology, Faculty of Agriculture, Iwate University, Ueda, 3-18-8, Morioka 020-8550, Japan; Department of Pathogenic Veterinary Science, United Graduate School of Veterinary Science, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan.
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Miquel J, Martellet MR, Acosta L, Toledo R, Pétavy AF. Reinvestigation of the sperm ultrastructure of Hypoderaeum conoideum (Digenea: Echinostomatidae). Parasitol Res 2018; 117:3725-3732. [PMID: 30173341 DOI: 10.1007/s00436-018-6071-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/28/2018] [Indexed: 11/24/2022]
Abstract
Spermatological characteristics of the digenean Hypoderaeum conoideum (Echinostomatidae) collected from Anas platyrhynchos in the Lac d'Annecy (France) were reinvestigated using transmission electron microscopy. The previous study on this species only describes the presence of two axonemes of unequal lengths, a mitochondrion, a posterior nucleus, and the disposition of cortical microtubules. The present ultrastructural study reveals that the mature spermatozoon of H. conoideum is a filiform cell tapered at both extremities. The sperm cell exhibits the characteristics of a digenean spermatozoa type V, namely two axonemes of the 9 + '1' pattern of trepaxonematan Platyhelminthes, external ornamentation of the plasma membrane associated with cortical microtubules, and located in the anterior part of the proximal region of the sperm cell, lateral expansions, two bundles of parallel cortical microtubules, maximum number of cortical microtubules in the anterior part of the spermatozoon, and presence of two mitochondria. In addition, the sperm cell of H. conoideum shows spine-like bodies and a posterior extremity with only the nucleus. The ultrastructural characters of the spermatozoon of H. conoideum are compared with those of other digeneans belonging to the superfamily Echinostomatoidea.
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Affiliation(s)
- Jordi Miquel
- Secció de Parasitologia, Departament de Biologia, Sanitat i Medi ambient, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII, sn, 08028, Barcelona, Spain. .,Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, Av. Diagonal, 645, 08028, Barcelona, Spain.
| | - Magalie René Martellet
- Université Clermont Auvergne, INRA, VetAgro Sup, UMR EPIA Epidémiologie des maladies animales et zoonotiques, 63122, Saint-Genès-Champanelle, France
| | - Lucrecia Acosta
- Área de Parasitología del Departamento de Agroquímica y Medioambiente, Universidad Miguel Hernández de Elche, Alicante, Spain
| | - Rafael Toledo
- Departament de Farmàcia i Tecnologia Farmacèutica i Parasitologia, Facultat de Farmàcia, Universitat de València, 46100 Burjassot, València, Spain
| | - Anne-Françoise Pétavy
- Laboratoire de Parasitologie et Mycologie Médicale, Faculté de Pharmacie, Université Claude Bernard-Lyon 1, 8 Av. Rockefeller, 69373, Lyon, Cedex 08, France
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Multilocus phylogenetic analysis and morphological data reveal a new species composition of the genus Drepanocephalus Dietz, 1909 (Digenea: Echinostomatidae), parasites of fish-eating birds in the Americas. J Helminthol 2017; 92:572-595. [DOI: 10.1017/s0022149x17000815] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
AbstractMembers of the genus Drepanocephalus are endoparasites of fish-eating birds of the families Phalacrocoracidae and Sulidae distributed across the Americas. Currently, Drepanocephalus contains three species, i.e. D. spathans (type species), D. olivaceus and D. auritus. Two additional species, D. parvicephalus and D. mexicanus were transferred to the genus Petasiger. In the current study, available DNA sequences of D. spathans, D. auritus and Drepanocephalus sp., were aligned with newly generated sequences of D. spathans and Petasiger mexicanus. Phylogenetic analyses inferred with three nuclear (LSU, SSU and ITS1, 5.8S, ITS2) and two mitochondrial (cox1, nad1) molecular markers showed that the sequences of D. spathans and D. auritus are nested together in a single clade with very low genetic divergence, with Petasiger mexicanus as its sister species. Additionally, P. mexicanus was not a close relative of other members of the genus Petasiger, showing that P. mexicanus actually belongs to the genus Drepanocephalus, suggesting the need to re-allocate Petasiger mexicanus back into the genus Drepanocephalus, as D. mexicanus. Morphological observations of the newly sampled individuals of D. spathans showed that the position of the testes is variable and testes might be contiguous or widely separated, which is one of the main diagnostic traits for D. auritus. Our results suggest that D. auritus might be considered a synonym of D. spathans and, as a result, the latter represents a species with a wide geographic range across the Americas, parasitizing both the Neotropical and the double-crested cormorant in Argentina, Brazil, Paraguay, Venezuela, Colombia, Mexico, USA and Canada.
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Woodyard ET, Rosser TG, Rush SA. Alligator wrestling: morphological, molecular, and phylogenetic data on Odhneriotrema incommodum (Leidy, 1856) (Digenea: Clinostomidae) from Alligator mississippiensis Daudin, 1801 in Mississippi, USA. Parasitol Res 2017; 116:2981-2993. [PMID: 28894925 DOI: 10.1007/s00436-017-5607-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Accepted: 08/30/2017] [Indexed: 11/30/2022]
Abstract
Based on specimens collected from harvested American alligator Alligator mississippiensis Daudin, 1801 in Mississippi, USA, novel molecular data for both nuclear ribosomal genes (18S, ITS1-5.8S, ITS2, and 28S) and mitochondrial genes (cytochrome c oxidase subunit 1 and nicotinamide adenine dinucleotide dehydrogenase subunit 1) are provided for Odhneriotrema incommodum (Leidy, 1856), a trematode of the family Clinostomidae Lühe, 1901 infecting A. mississippiensis and the Florida spotted gar Lepisosteus platyrhincus DeKay, 1842. This represents the first sequencing data available for the genus Odhneriotrema and the subfamily Nephrocephalinae Travassos, 1928. Additionally, the results of phylogenetic analyses, additional morphometric data, a photomicrograph, and a line drawing supporting the present identification of O. incommodum are provided. These data will aid in elucidating the life cycle of O. incommodum through molecular identification of larval stages as well as understanding the evolutionary history of Clinostomidae and its subfamilies. Implications for the currently accepted organization of the Clinostomidae are discussed.
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Affiliation(s)
- Ethan T Woodyard
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, 39762, USA.
| | - Thomas Graham Rosser
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Scott A Rush
- Department of Wildlife, Fisheries, and Aquaculture, College of Forest Resources, Mississippi State University, Mississippi State, MS, 39762, USA
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Alberson NR, Rosser TG, Buddenborg SK, Khoo LH, Loker ES, Richardson TD, Woodyard ET, Wise DJ, Pote LM, Griffin MJ. North and South American Haplotypes ofDrepanocephalus auritus(Digenea: Echinostomatidae) Are Released fromBiomphalaria havanensis(Mollusca: Planorbidae) Inhabiting Catfish Aquaculture Ponds in Mississippi, U.S.A. COMP PARASITOL 2017. [DOI: 10.1654/1525-2647-84.2.87] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Neely R. Alberson
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, 240 Wise Center Drive, Mississippi State, Mississippi 39762, U.S.A. (e-mail: )
| | - Thomas G. Rosser
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, 240 Wise Center Drive, Mississippi State, Mississippi 39762, U.S.A. (e-mail: )
| | - Sarah K. Buddenborg
- Department of Biology, University of New Mexico, 1 University of New Mexico, Albuquerque, New Mexico 81731, U.S.A.
| | - Lester H. Khoo
- Thad Cochran National Warmwater Aquaculture Center, Mississippi State University, 127 Experiment Station Road, Stoneville, Mississippi 38776, U.S.A.
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, 240 Wise Center Drive, Mississippi State, Mississippi 39762, U.S.A
| | - Eric S. Loker
- Department of Biology, University of New Mexico, 1 University of New Mexico, Albuquerque, New Mexico 81731, U.S.A.
| | - Terry D. Richardson
- Department of Biology, University of North Alabama, 459 North Court Street, Florence, Alabama 35632, U.S.A.
| | - Ethan T. Woodyard
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, 240 Wise Center Drive, Mississippi State, Mississippi 39762, U.S.A. (e-mail: )
| | - David J. Wise
- Thad Cochran National Warmwater Aquaculture Center, Mississippi State University, 127 Experiment Station Road, Stoneville, Mississippi 38776, U.S.A.
| | - Linda M. Pote
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, 240 Wise Center Drive, Mississippi State, Mississippi 39762, U.S.A. (e-mail: )
| | - Matt J. Griffin
- Thad Cochran National Warmwater Aquaculture Center, Mississippi State University, 127 Experiment Station Road, Stoneville, Mississippi 38776, U.S.A.
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, 240 Wise Center Drive, Mississippi State, Mississippi 39762, U.S.A
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Nugaraitė D, Mažeika V, Paulauskas A. Molecular and morphological characterization of Isthmiophora melis (Schrank, 1788) Luhe, 1909 (Digenea: Echinostomatidae) from American mink (Neovison vison) and European polecat (Mustela putorius) in Lithuania. Helminthologia 2017. [DOI: 10.1515/helm-2017-0012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Summary
The specimens collected from American mink (Neovison vison) and European polecat (Mustela putorius) in Lithuania were morphologically identified as Isthmiophora melis (Schrank, 1788) Lühe, 1909 and were molecularly characterized through sequencing of partial 18S rDNA, 28S rDNA, ITS1- 5.8S-ITS2 region, and ND1. Relations of I. melis to other species of the genus Isthmiophora Lühe 1909 were discussed. According to ITS1 and ND1 sequences the closest species to I. melis is Isthmiophora hortensis (Asada, 1926).
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Affiliation(s)
- D. Nugaraitė
- Faculty of Natural Sciences of Vytautas Magnus University, Vileikos Str. 8, LT-44404, Kaunas , Lithuania
| | - V. Mažeika
- Faculty of Natural Sciences of Vytautas Magnus University, Vileikos Str. 8, LT-44404, Kaunas , Lithuania
| | - A. Paulauskas
- Faculty of Natural Sciences of Vytautas Magnus University, Vileikos Str. 8, LT-44404, Kaunas , Lithuania
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Molecular analyses reveal high species diversity of trematodes in a sub-Arctic lake. Int J Parasitol 2017; 47:327-345. [DOI: 10.1016/j.ijpara.2016.12.008] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Revised: 12/09/2016] [Accepted: 12/12/2016] [Indexed: 02/05/2023]
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Georgieva S, Blasco-Costa I, Kostadinova A. Molecular characterisation of four echinostomes (Digenea: Echinostomatidae) from birds in New Zealand, with descriptions of Echinostoma novaezealandense n. sp. and Echinoparyphium poulini n. sp. Syst Parasitol 2017; 94:477-497. [PMID: 28341929 DOI: 10.1007/s11230-017-9712-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2016] [Accepted: 02/26/2017] [Indexed: 11/26/2022]
Abstract
Morphological and molecular characterisation of echinostome specimens (Digenea: Echinostomatidae) recovered in one Anas platyrhynchos L. and one Cygnus atratus (Latham) (Anseriformes: Anatidae) from New Zealand revealed the presence of two known species, Echinostoma miyagawai Ishii, 1932 and Echinoparyphium ellisi (Johnston & Simpson, 1944) and two species new to science. Comparative morphological and phylogenetic analyses supported the distinct species status of Echinostoma novaezealandense n. sp. ex Branta canadensis (L.), A. platyrhynchos and C. atratus, and Echinoparyphium poulini n. sp. ex C. atratus. Echinostoma novaezealandense n. sp., a species of the "revolutum" species complex characterised by the possession of a head collar armed with 37 spines, keyed down to E. revolutum but was distinguished from the latter in having a much narrower body with almost parallel margins, longer oesophagus, wider cirrus-sac, larger seminal vesicle, much smaller ventral sucker, ovary, Mehlis' gland and testes, more anteriorly located ovary and testes, and distinctly smaller eggs (81-87 × 42-53 vs 106-136 × 55-70 µm). This new species appears similar to Echinostoma acuticauda Nicoll, 1914 described in Australia but differs in having a longer forebody, more posteriorly located ovary and testes, and much smaller eggs (81-87 × 42-53 vs 112-126 × 63-75 µm). Echinoparyphium poulini n. sp. is differentiated from the four species of Echinoparyphium possessing 37 collar spines considered valid as follows: from E. chinensis Ku, Li & Chu, 1964 in having a much smaller body, four (vs five) angle spines and simple seminal vesicle (vs bipartite); from E. schulzi Matevosyan, 1951 in having a less robust body at a comparable body length, much smaller ventral sucker, ovary and testes, and longer but narrower eggs (87-109 × 50-59 vs 70-85 × 60-84 µm); and from the two smaller forms, E. serratum Howell, 1968 and E. aconiatum Dietz, 1909, in a number of additional metrical features correlated with body size and especially in the possession of much larger collar spines. Partial fragments of the mitochondrial nad1 and 28S rRNA genes were amplified for representative isolates of the four species and analysed together with sequences for Echinostoma spp. and Echinoparyphium spp. available on GenBank. Phylogenetic analyses based on the mitochondrial nad1 gene revealed congruence between the molecular data and species identification/delineation based on morphology; this was corroborated by the 28S rDNA sequence data.
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Affiliation(s)
- Simona Georgieva
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, 370 05, České Budějovice, Czech Republic.
| | - Isabel Blasco-Costa
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, 370 05, České Budějovice, Czech Republic
- Natural History Museum of Geneva, Route de Malagnou 1, 1208, Geneva, Switzerland
| | - Aneta Kostadinova
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, 370 05, České Budějovice, Czech Republic
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Fraija-Fernández N, Fernández M, Lehnert K, Raga JA, Siebert U, Aznar FJ. Long-Distance Travellers: Phylogeography of a Generalist Parasite, Pholeter gastrophilus, from Cetaceans. PLoS One 2017; 12:e0170184. [PMID: 28085945 PMCID: PMC5234839 DOI: 10.1371/journal.pone.0170184] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 12/30/2016] [Indexed: 11/22/2022] Open
Abstract
We studied the phylogeography and historical demography of the most generalist digenean from cetaceans, Pholeter gastrophilus, exploring the effects of isolation by distance, ecological barriers and hosts’ dispersal ability on the population structure of this parasite. The ITS2 rDNA, and the mitochondrial COI and ND1 from 68 individual parasites were analysed. Worms were collected from seven oceanic and coastal cetacean species from the south western Atlantic (SWA), central eastern Atlantic, north eastern Atlantic (NEA), and Mediterranean Sea. Pholeter gastrophilus was considered a single lineage because reciprocal monophyly was not detected in the ML cladogram of all individuals, and sequence variability was <1% for mtDNA and 0% for ITS2. These results rule out a recent suggestion that P. gastrophilus would actually be a cryptic-species complex. The genetic cohesion of P. gastrophilus could rely on the extensive exploitation of wide-ranging and highly mobile cetaceans, with a putative secondary role, if any, of intermediate hosts. Unique haplotypes were detected in SWA and NEA, and an AMOVA revealed significant population structure associated to the genetic variation in these regions. The Equator possibly acts as a significant geographical barrier for cetacean movements, possibly limiting gene flow between northern and southern populations of P. gastrophilus. A partial Mantel tests revealed that the significant isolation of NEA populations resulted from geographic clustering. Apparently, the limited mobility of cetaceans used by P. gastrophilus as definitive hosts in this region, coupled with oceanographic barriers and a patchy distribution of potential intermediate hosts could contribute to significant ecological isolation of P. gastrophilus in NEA. Rather unexpectedly, no genetic differentiation was found in the Mediterranean samples of this parasite. Historical demographic analyses suggested a recent population expansion of P. gastrophilus in the Atlantic Ocean, perhaps linked to initial association and subsequent spreading in cetaceans.
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Affiliation(s)
- Natalia Fraija-Fernández
- Cavanilles Institute of Biodiversity and Evolutionary Biology, Science Park, University of Valencia, Paterna, Valencia, Spain
- * E-mail:
| | - Mercedes Fernández
- Cavanilles Institute of Biodiversity and Evolutionary Biology, Science Park, University of Valencia, Paterna, Valencia, Spain
| | - Kristina Lehnert
- Institute for Terrestrial and Aquatic Wildlife Research, University of Veterinary Medicine Hannover, Werftstrasse, Büsum, Germany
| | - Juan Antonio Raga
- Cavanilles Institute of Biodiversity and Evolutionary Biology, Science Park, University of Valencia, Paterna, Valencia, Spain
| | - Ursula Siebert
- Institute for Terrestrial and Aquatic Wildlife Research, University of Veterinary Medicine Hannover, Werftstrasse, Büsum, Germany
| | - Francisco Javier Aznar
- Cavanilles Institute of Biodiversity and Evolutionary Biology, Science Park, University of Valencia, Paterna, Valencia, Spain
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Liu ZX, Zhang Y, Liu YT, Chang QC, Su X, Fu X, Yue DM, Gao Y, Wang CR. Complete Mitochondrial Genome of Echinostoma hortense (Digenea: Echinostomatidae). THE KOREAN JOURNAL OF PARASITOLOGY 2016; 54:173-9. [PMID: 27180575 PMCID: PMC4870973 DOI: 10.3347/kjp.2016.54.2.173] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 01/16/2016] [Accepted: 01/23/2016] [Indexed: 11/23/2022]
Abstract
Echinostoma hortense (Digenea: Echinostomatidae) is one of the intestinal flukes with medical importance in humans. However, the mitochondrial (mt) genome of this fluke has not been known yet. The present study has determined the complete mt genome sequences of E. hortense and assessed the phylogenetic relationships with other digenean species for which the complete mt genome sequences are available in GenBank using concatenated amino acid sequences inferred from 12 protein-coding genes. The mt genome of E. hortense contained 12 protein-coding genes, 22 transfer RNA genes, 2 ribosomal RNA genes, and 1 non-coding region. The length of the mt genome of E. hortense was 14,994 bp, which was somewhat smaller than those of other trematode species. Phylogenetic analyses based on concatenated nucleotide sequence datasets for all 12 protein-coding genes using maximum parsimony (MP) method showed that E. hortense and Hypoderaeum conoideum gathered together, and they were closer to each other than to Fasciolidae and other echinostomatid trematodes. The availability of the complete mt genome sequences of E. hortense provides important genetic markers for diagnostics, population genetics, and evolutionary studies of digeneans.
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Affiliation(s)
- Ze-Xuan Liu
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, P. R. China
| | - Yan Zhang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, P. R. China
| | - Yu-Ting Liu
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, P. R. China
| | - Qiao-Cheng Chang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, P. R. China
| | - Xin Su
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, P. R. China
| | - Xue Fu
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, P. R. China
| | - Dong-Mei Yue
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, P. R. China
| | - Yuan Gao
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, P. R. China
| | - Chun-Ren Wang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, P. R. China
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Molecular phylogeny and systematics of the Echinostomatoidea Looss, 1899 (Platyhelminthes: Digenea). Int J Parasitol 2015; 46:171-185. [PMID: 26699402 DOI: 10.1016/j.ijpara.2015.11.001] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 11/01/2015] [Accepted: 11/10/2015] [Indexed: 11/24/2022]
Abstract
The Echinostomatoidea is a large, cosmopolitan group of digeneans currently including nine families and 105 genera, the vast majority parasitic, as adults, in birds with relatively few taxa parasitising mammals, reptiles and, exceptionally, fish. Despite the complex structure, diverse content and substantial species richness of the group, almost no attempt has been made to elucidate its phylogenetic relationships at the suprageneric level based on molecules due to the lack of data. Herein, we evaluate the consistency of the present morphology-based classification system of the Echinostomatoidea with the phylogenetic relationships of its members based on partial sequences of the nuclear lsrRNA gene for a broad diversity of taxa (80 species, representing eight families and 40 genera), including representatives of five subfamilies of the Echinostomatidae, which currently exhibits the most complex taxonomic structure within the superfamily. This first comprehensive phylogeny for the Echinostomatoidea challenged the current systematic framework based on comparative morphology. A morphology-based evaluation of this new molecular framework resulted in a number of systematic and nomenclatural changes consistent with the phylogenetic estimates of the generic and suprageneric boundaries and a new phylogeny-based classification of the Echinostomatoidea. In the current systematic treatment: (i) the rank of two family level lineages, the former Himasthlinae and Echinochasminae, is elevated to full family status; (ii) Caballerotrema is distinguished at the family level; (iii) the content and diagnosis of the Echinostomatidae (sensu stricto) (s. str.) are revised to reflect its phylogeny, resulting in the abolition of the Nephrostominae and Chaunocephalinae as synonyms of the Echinostomatidae (s. str.); (iv) Artyfechinostomum, Cathaemasia, Rhopalias and Ribeiroia are re-allocated within the Echinostomatidae (s. str.), resulting in the abolition of the Cathaemasiidae, Rhopaliidae and Ribeiroiinae, which become synonyms of the Echinostomatidae (s. str.); and (v) refinements of the generic boundaries within the Echinostomatidae (s. str.), Psilostomidae and Fasciolidae are made.
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Molecular characterization ofOpisthorchis noverca(Digenea: Opisthorchiidae) based on nuclear ribosomal ITS2 and mitochondrial COI genes. J Helminthol 2015; 90:607-14. [DOI: 10.1017/s0022149x15000851] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
AbstractOpisthorchiasis is a public health problem in South-East Asian countries and Eastern Europe. The infection implicates mainly two species ofOpisthorchis, namelyO. viverriniandO. felineus,that occur mostly in fish-eating mammals and humans, although there are rare reports of human cases involving two other species,O. novercaandO. guayaquilensis.Opisthorchis novercahas been reported frequently in dogs and pigs from the Indian subcontinent, with rare reports from cattle and human subjects. With a view to supplementing morphology-based identification of this species, the present study aimed to provide molecular characterization ofO. noverca, using rDNA internal transcribed spacer 2 (ITS2) and mitochondrial cytochrome oxidase I (mt COI) markers so as to determine its genetic correlation with other species of Opisthorchiidae, and also to generate a taxon-specific molecular marker based on the ITS2 region. The phylogenetic relationship betweenO. novercaand other species of the genus was determined using molecular sequence data. To strengthen the result, secondary structure sequence analyses of ITS2 with hemi-compensatory base changes (hCBCs), and amino acid sequence analyses, were also evaluated. Our results confirm thatO. novercais a distinct and valid species.
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Hildebrand J, Adamczyk M, Laskowski Z, Zaleśny G. Host-dependent morphology of Isthmiophora melis (Schrank, 1788) Luhe, 1909 (Digenea, Echinostomatinae)--morphological variation vs. molecular stability. Parasit Vectors 2015; 8:481. [PMID: 26394689 PMCID: PMC4580402 DOI: 10.1186/s13071-015-1095-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 09/15/2015] [Indexed: 11/12/2022] Open
Abstract
Background Echinostomes are cosmopolitan digenean parasites which infect many different warm-blooded hosts. Their classification is extremely confused; the host spectrum is wide, and morphological similarities often result in misidentification. During our long-term studies on the helminth fauna of rodents and carnivores we have collected 27 collar-spined echinostomes which differ in morphology to an extent that suggests the presence of more than one species. Here, we describe this material, and the extent of host-related variation in this parasite. Methods Specimens of Isthmiophora isolated from four host species (badger, American mink, hedgehog, striped field mouse) were subject to morphological and molecular examination; the data were statistically analysed. Results Our results show that genetically all the Isthmiophora specimens obtained from all the examined hosts are conspecific and represent I. melis. On the other hand, the individuals isolated from Apodemus agrarius are morphologically distinct and, based on this criterion alone, should be described as a new species. Conclusions The morphological traits of Isthmiophora melis are much variable and host-dependent; without molecular analysis they would suggest a necessity to describe a new species or even genus. Such a high level of intraspecific variability may be affected by the host’s longevity.
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Affiliation(s)
- Joanna Hildebrand
- Department of Parasitology, Institute of Genetics and Microbiology, Wrocław University, Przybyszewskiego 63, 51-148, Wrocław, Poland.
| | - Maja Adamczyk
- Department of Parasitology, Institute of Genetics and Microbiology, Wrocław University, Przybyszewskiego 63, 51-148, Wrocław, Poland.
| | - Zdzisław Laskowski
- Institute of Parasitology, Polish Academy of Science, Twarda 51/55, 00-818, Warszawa, Poland.
| | - Grzegorz Zaleśny
- Department of Systematic and Ecology of Invertebrates, Institute of Biology, Wrocław University of Environmental and Life Sciences, Kożuchowska 5b, 51-631, Wrocław, Poland.
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Nagataki M, Tantrawatpan C, Agatsuma T, Sugiura T, Duenngai K, Sithithaworn P, Andrews RH, Petney TN, Saijuntha W. Mitochondrial DNA sequences of 37 collar-spined echinostomes (Digenea: Echinostomatidae) in Thailand and Lao PDR reveals presence of two species: Echinostoma revolutum and E. miyagawai. INFECTION GENETICS AND EVOLUTION 2015. [PMID: 26205690 DOI: 10.1016/j.meegid.2015.07.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The "37 collar-spined" or "revolutum" group of echinostomes is recognized as a species complex. The identification of members of this complex by morphological taxonomic characters is difficult and confusing, and hence, molecular analyses are a useful alternative method for molecular systematic studies. The current study examined the genetic diversity of those 37 collar-spined echinostomes which are recognized morphologically as Echinostoma revolutum in Thailand and Lao PDR using the cytochrome c oxidase subunit 1 (CO1) and the NADH dehydrogenase subunit 1 (ND1) sequences. On the basis of molecular investigations, at least two species of 37 collar-spined echinostomes exist in Southeast Asia, namely E. revolutum and Echinostoma miyagawai. The specimens examined in this study, coming from ducks in Thailand and Lao PDR, were compared to isolates from America, Europe and Australia for which DNA sequences are available in public databases. Haplotype analysis detected 6 and 26 haplotypes when comparing the CO1 sequences of E. revolutum and E. miyagawai, respectively, from different geographical isolates from Thailand and Lao PDR. The phylogenetic trees, ND1 haplotype network and genetic differentiation (ɸST) analyses showed that E. revolutum were genetically different on a continental scale, i.e. Eurasian and American lineages.
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Affiliation(s)
- Mitsuru Nagataki
- Division of Environmental Health Sciences, Kochi Medical School, Kochi University, Oko, Nankoku 783-8505, Japan
| | - Chairat Tantrawatpan
- Division of Cell Biology, Department of Preclinical Sciences, Faculty of Medicine, Thammasat University, Rangsit Campus, Pathum Thani 12120, Thailand
| | - Takeshi Agatsuma
- Division of Environmental Health Sciences, Kochi Medical School, Kochi University, Oko, Nankoku 783-8505, Japan
| | - Tetsuro Sugiura
- Department of Clinical Laboratory Medicine, Kochi Medical School, Kochi University, Oko, Nankoku 783-8505, Japan
| | - Kunyarat Duenngai
- Department of Public Health, Faculty of Science and Technology, Phetchabun Rajabhat University, Phetchabun 67000, Thailand
| | - Paiboon Sithithaworn
- Liver Fluke and Cholangiocarcinoma Research Center (LFCRC), Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Ross H Andrews
- Liver Fluke and Cholangiocarcinoma Research Center (LFCRC), Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Imperial College London, Faculty of Medicine, St Mary's Campus, South Wharf Street, London W2 1NY, United Kingdom; Cholangiocarcinoma Screening and Care Program, Faculty of Medicine, Khon Kaen Univeristy, Khon Kaen 40002, Thailand
| | - Trevor N Petney
- Institute of Zoology 1: Ecology and Parasitology, University of Karlsruhe, Kornblumen Strasse 13, Karlsruhe, Germany; Cholangiocarcinoma Screening and Care Program, Faculty of Medicine, Khon Kaen Univeristy, Khon Kaen 40002, Thailand
| | - Weerachai Saijuntha
- Walai Rukhavej Botanical Research Institute (WRBRI), Mahasarakham University, Maha Sarakham 44150, Thailand.
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Pinto HA, Griffin MJ, Quiniou SM, Ware C, Melo AL. Biomphalaria straminea (Mollusca: Planorbidae) as an intermediate host of Drepanocephalus spp. (Trematoda: Echinostomatidae) in Brazil: a morphological and molecular study. Parasitol Res 2015; 115:51-62. [PMID: 25982569 DOI: 10.1007/s00436-015-4469-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Accepted: 04/03/2015] [Indexed: 11/26/2022]
Abstract
Species of trematodes belonging to the genus Drepanocephalus are intestinal parasites of piscivorous birds, primarily cormorants (Phalachrocorax spp.), and are widely reported in the Americas. During a 4-year malacological study conducted on an urban lake in Brazil, 27-collar-spined echinostome cercariae were found in 1665/15,459 (10.7 %) specimens of Biomphalaria straminea collected. The cercariae were identified as Drepanocephalus spp. by sequencing the 18S (SSU) rDNA, ITS1/5.8S rDNA/ITS2 (ITS), 28S (LSU) rDNA region, cytochrome oxidase subunit 1 (CO1), and nicotinamide adenine dinucleotide dehydrogenase subunit 1 (ND1) markers. In experimental life cycle studies, metacercariae developed in laboratory-reared guppies (Poecilia reticulata); however, attempts to infect birds and rodents were unsuccessful. Two closely related morphotypes of cercariae were characterized. One species, identified by molecular markers as a genetic variant of Drepanocephalus auritus (99.9 % similarity at SSU, ITS, LSU; 97.2 % at CO1; 95.8 % at ND1), differs slightly from an archived North American isolate of this species also sequenced as part of this study. A second species, putatively identified as Drepanocephalus sp., has smaller cercariae and demonstrates significant differences from D. auritus at the CO1 (11.0 %) and ND1 (13.6 %) markers. Aspects related to the morphological taxonomic identification of 27-collar-spined echinostome metacercariae are briefly discussed. This is the first report of the involvement of molluscs of the genus Biomphalaria in the transmission of Drepanocephalus and the first report of D. auritus in South America.
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Affiliation(s)
- Hudson A Pinto
- Laboratório de Taxonomia e Biologia de Invertebrados, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil, C.P. 486, 30123-970.
| | - Matt J Griffin
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS, 38776, USA
| | - Sylvie M Quiniou
- Warmwater Aquaculture Research Unit, Thad Cochran National Warmwater Aquaculture Center, U. S. Department of Agriculture, Stoneville, Stoneville, MS, 38776, USA
| | - Cynthia Ware
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS, 38776, USA
| | - Alan L Melo
- Laboratório de Taxonomia e Biologia de Invertebrados, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil, C.P. 486, 30123-970
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A re-assessment of species diversity within the ‘revolutum’ group of Echinostoma Rudolphi, 1809 (Digenea: Echinostomatidae) in Europe. Syst Parasitol 2015; 90:1-25. [DOI: 10.1007/s11230-014-9530-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 10/14/2014] [Indexed: 10/24/2022]
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