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Semenas L, Arbetman M, Viozzi G, Gentiluomo J, Bontti S. Human diphyllobothriasis in Argentina: assessing the epidemiological significance from historical records and reports of new cases. Parasitol Res 2024; 123:205. [PMID: 38709381 DOI: 10.1007/s00436-024-08220-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 04/23/2024] [Indexed: 05/07/2024]
Abstract
Between 1898 and 1940, eight human cases of diphyllobothriasis were reported in Argentina, always in recently arrived European immigrants. In 1982, the first autochthonous case was detected, and since then, 33 other autochthonous cases have been reported, totaling 42 cases of human diphyllobothriasis in Argentina before the present study. Our aim is to update the information on diphyllobothriasis in Argentina by identifying specimens from new cases using morphometrical and/or molecular methods. We also aim to assess the epidemiological relevance of this food-borne disease in the country. Anamnestic data were obtained from patients or professionals, along with 26 worms identified using morphometrical (21 samples) and molecular techniques (5 samples). All the patients acquired the infection by consuming freshwater salmonids caught in Andean lakes in Northern Patagonia. Morphometrics and DNA markers of worms were compatible with Dibothriocephalus latus. In total, 68 human cases have been detected in Argentina, 60 of which were autochthonous. The human population living North-western Patagonia, whose lakes are inhabited by salmonids, is increasing. Similarly, the number of other definitive hosts for Dibothriocephalus dendriticus (gulls) and for D. latus (dogs) is also increasing. In addition, salmonid fishing and the habit of consuming home-prepared raw fish dishes are becoming widespread. Therefore, it is to be expected that diphyllobothriasis in Argentina will increase further.
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Affiliation(s)
- Liliana Semenas
- Laboratorio de Parasitología, INIBIOMA (CONICET-Universidad Nacional del Comahue), Bariloche, Río Negro, Argentina
| | - Marina Arbetman
- Grupo de Ecología de La Polinización, INIBIOMA (CONICET-Universidad Nacional del Comahue), Bariloche, Río Negro, Argentina
| | - Gustavo Viozzi
- Laboratorio de Parasitología, INIBIOMA (CONICET-Universidad Nacional del Comahue), Bariloche, Río Negro, Argentina.
| | | | - Sergio Bontti
- Laboratorio de Referencia de Enfermedades Transmisibles, Ministerio de Salud Mendoza; INBIOMED-UM, Facultad de Ciencias Médicas Universidad de Mendoza, Mendoza, Argentina
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Radačovská A, Čisovská Bazsalovicsová E, Šoltys K, Štefka J, Minárik G, Gustinelli A, Chugunova JK, Králová-Hromadová I. Unique genetic structure of the human tapeworm Dibothriocephalus latus from the Alpine lakes region - a successful adaptation? Parasitology 2022; 149:1106-1118. [PMID: 35570686 PMCID: PMC11010471 DOI: 10.1017/s0031182022000634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 04/22/2022] [Accepted: 04/29/2022] [Indexed: 11/07/2022]
Abstract
Dibothriocephalus latus is the most frequent causative agent of fish-borne zoonosis (diphyllobothriosis) in Europe, where it is currently circulating mainly in the Alpine lakes region (ALR) and Russia. Three mitochondrial genes (cox1, cob and nad3) and 6 microsatellite loci were analysed to determine how is the recently detected triploidy/parthenogenesis in tapeworms from ALR displayed at the DNA level. A geographically distant population from the Krasnoyarsk Reservoir in Russia (RU-KR) was analysed as a comparative population. One or 2 alleles of each microsatellite locus was detected in plerocercoids from RU-KR, corresponding to the microsatellite pattern of a diploid organism. In contrast, 1–3 alleles were observed in tapeworms from ALR, in accordance with their triploidy. The high diversity of mitochondrial haplotypes in D. latus from RU-KR implied an original and relatively stable population, but the identical structure of mitochondrial genes of tapeworms from ALR was probably a consequence of a bottleneck typical of introduced populations. These results indicated that the diploid/sexually reproducing population from RU-KR was ancestral, located within the centre of the distribution of the species, and the triploid/parthenogenetically reproducing subalpine population was at the margin of the distribution. The current study revealed the allelic structure of the microsatellite loci in the triploid tapeworm for the first time.
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Affiliation(s)
- Alžbeta Radačovská
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, 04001 Košice, Slovakia
| | | | - Katarína Šoltys
- Department of Microbiology and Virology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 84215 Bratislava, Slovakia
| | - Jan Štefka
- Biology Centre CAS, Institute of Parasitology, Branišovská 31, 37005 České Budějovice, Czech Republic
- Faculty of Science, University of South Bohemia, Branišovská 1760, 37005 České Budějovice, Czech Republic
| | - Gabriel Minárik
- Medirex, a.s., Galvaniho 17/C, P.O. Box 143, 82016 Bratislava, Slovakia
| | - Andrea Gustinelli
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia, BO, Italy
| | - Julia K. Chugunova
- Krasnoyarsk Branch of the Russian Federal Research Institute of Fisheries and Oceanography ‘VNIRO’, Parizhskoi Kommuny, 33, 660097 Krasnoyarsk, Russia
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Kutyrev IA, Mordvinov VA. Population genetic structure of diphyllobothriid tapeworms (Cestoda: Diphyllobothriidea) parasitising fish in the Baikal Rift Zone. Dis Aquat Organ 2022; 148:113-125. [PMID: 35297380 DOI: 10.3354/dao03646] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Tapeworms of the genus Dibothriocephalus are widely distributed throughout the world, and some are agents of human diphyllobothriasis, one of the most important fish-borne zoonoses caused by a cestode parasite. Until now, the population genetic structure of diphyllobothriid tapeworms in the Baikal Rift Zone (BRZ) has remained unexplored. The major aim of this study was to analyse the population genetic structure of D. dendriticus and D. ditremus parasitising fish in the BRZ based on internal transcribed spacer 1 (ITS1) and mitochondrial gene cytochrome oxidase subunit I (cox1) sequences. We found that both species had complex population genetic structures. Each species formed 2 clades (D. dendriticus: Clade 1 & 2; D. ditremus Clade A & B) that differed in genetic diversity. D. dendriticus haplotypes in Clade 1 formed a star-like sub-network with a main haplotype, whereas the haplotypes in Clade 2 formed a diffuse network. We assumed that the complex population genetic structure of D. dendriticus was a consequence of populations evolving under different palaeoecological conditions during the Last Glacial Maximum. In contrast to D. dendriticus, both clades in the D. ditremus samples formed a diffuse network. Our findings revealed hypothetical pathways in the formation of the population genetic structure of diphyllobothriids in the BRZ. On one hand, isolation by distance played an important role; on the other hand, lake recolonisation from refugia and a genetic bottleneck after the end of the Last Glacial Maximum had a possible influence.
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Affiliation(s)
- Ivan A Kutyrev
- Institute of General and Experimental Biology, Siberian Branch of Russian Academy of Sciences, 670047 Ulan-Ude, Russia
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Orosová M, Marková A, Provazníková I, Oros M, Radačovská A, Čadková Z, Marec F. Molecular cytogenetic analysis of a triploid population of the human broad tapeworm, Dibothriocephalus latus (Diphyllobothriidea). Parasitology 2021; 148:787-797. [PMID: 33678200 PMCID: PMC11010143 DOI: 10.1017/s0031182021000408] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/17/2021] [Accepted: 02/22/2021] [Indexed: 11/06/2022]
Abstract
The large-sized tapeworm Dibothriocephalus latus is known as the broad or fish-borne cestode of mammals that is capable to infect humans and cause diphyllobothriosis. Recently, molecular data on D. latus has been accumulating in the literature and a complete genome sequence has been published; however, little is known about the karyotype and chromosome architecture. In this study, an in-depth karyological analysis of 2 D. latus specimens was carried out. The plerocercoids originated from a perch caught in subalpine Lake Iseo (Italy) and the tapeworms were reared in hamsters. Both specimens contained cells with a highly variable number of chromosomes ranging from18 to 27. Nevertheless, the largest portion of mitotic figures (47%) showed a number corresponding to the triploid set, 3n = 27. Accordingly, the karyotype of the analyzed specimens consisted of 9 triplets of metacentric chromosomes. Fluorescence in situ hybridization (FISH) with the 18S rDNA probe clearly demonstrated the presence of 3 clusters of hybridization signals on the triplet of chromosome 7, thus confirming the triploid status of the specimens. FISH with a telomeric (TTAGGG)n probe confined hybridization signals exclusively to the terminal chromosomal regions, supporting the earlier findings that this repetitive motif is a conserved feature of tapeworm telomeres.
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Affiliation(s)
- Martina Orosová
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, Košice04001, Slovakia
| | - Anna Marková
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, Košice04001, Slovakia
| | - Irena Provazníková
- Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branišovská 31, České Budějovice37005, Czech Republic
- Faculty of Science, University of South Bohemia, Branišovská 1760, České Budějovice37005
| | - Mikuláš Oros
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, Košice04001, Slovakia
| | - Alžbeta Radačovská
- Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, Košice04001, Slovakia
| | - Zuzana Čadková
- Department of Zoology and Fisheries, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Science Prague (CZU), Kamýcká 129, Prague16500
| | - František Marec
- Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branišovská 31, České Budějovice37005, Czech Republic
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Moore CV, Thompson RCA, Jabbar A, Williams J, Rasiah K, Pallant L, Koehler AP, Graham C, Weldhagen GF. Rare Human Infection with Pacific Broad Tapeworm Adenocephalus pacificus, Australia. Emerg Infect Dis 2018; 22:1510-2. [PMID: 27433924 PMCID: PMC4982173 DOI: 10.3201/eid2208.160156] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Cai YC, Chen SH, Yamasaki H, Chen JX, Lu Y, Zhang YN, Li H, Ai L, Chen HN. Four Human Cases of Diphyllobothrium nihonkaiense (Eucestoda: Diphyllobothriidae) in China with a Brief Review of Chinese Cases. Korean J Parasitol 2017; 55:319-325. [PMID: 28719957 PMCID: PMC5523898 DOI: 10.3347/kjp.2017.55.3.319] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 02/16/2017] [Accepted: 03/26/2017] [Indexed: 11/23/2022]
Abstract
We described 4 human infection cases of zoonotic fish-tapeworm, Diphyllobothrium nihonkaiense, identified with morphological and molecular characters and briefly reviewed Chinese cases in consideration of it as an emerging parasitic disease in China. The scolex and mature and gravid proglottids of some cases were seen, a rosette-shaped uterus was observed in the middle of the mature and gravid proglottids, and the diphyllobothriid eggs were yellowish-brown in color and displayed a small knob or abopercular protuberance on the opposite end of a lid-like opening. The average size of the eggs was recorded as 62-67×42-45 μm. The parasitic materials gathered from 4 human cases were morphologically identified as belonging to the genera Diphyllobothrium and Adenocephalus. The phylogenetic analysis based on the nucleotide sequences of cytochrome c oxidase subunit 1 gene of the etiologic agents confirmed that the 4 cases were D. nihonkaiense infection. The finding of 4 additional D. nihonkaiense cases suggests that D. nihonkaiense might be a major causative species of human diphyllobothriasis in China. A combined morphological and molecular analysis is the main method to confirm D. nihonkaiense infection.
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Affiliation(s)
- Yu-Chun Cai
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Laboratory of Parasite and Vector Biology, Ministry of Public Health; WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai 200025, China
| | - Shao-Hong Chen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Laboratory of Parasite and Vector Biology, Ministry of Public Health; WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai 200025, China
| | - Hiroshi Yamasaki
- Department of Parasitology, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Jia-Xu Chen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Laboratory of Parasite and Vector Biology, Ministry of Public Health; WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai 200025, China
| | - Yan Lu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Laboratory of Parasite and Vector Biology, Ministry of Public Health; WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai 200025, China
| | - Yong-Nian Zhang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Laboratory of Parasite and Vector Biology, Ministry of Public Health; WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai 200025, China
| | - Hao Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Laboratory of Parasite and Vector Biology, Ministry of Public Health; WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai 200025, China
| | - Lin Ai
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Laboratory of Parasite and Vector Biology, Ministry of Public Health; WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai 200025, China
| | - Hai-Ning Chen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Laboratory of Parasite and Vector Biology, Ministry of Public Health; WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai 200025, China
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Gustinelli A, Menconi V, Prearo M, Caffara M, Righetti M, Scanzio T, Raglio A, Fioravanti ML. Prevalence of Diphyllobothrium latum (Cestoda: Diphyllobothriidae) plerocercoids in fish species from four Italian lakes and risk for the consumers. Int J Food Microbiol 2016; 235:109-12. [PMID: 27491055 DOI: 10.1016/j.ijfoodmicro.2016.06.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 05/06/2016] [Accepted: 06/25/2016] [Indexed: 11/17/2022]
Abstract
In recent years there has been a re-emergence of diphyllobothriasis by Diphyllobothrium latum (Cestoda: Diphyllobothriidae) in Italy, France and Switzerland, where in the past this fish-borne zoonosis was widespread and then virtually disappeared. A change in eating habits such as the consumption of raw/undercooked freshwater fish, has led to an increased risk for consumers of ingesting infective larvae of D. latum. A survey on the factors responsible for the re-emergence of human diphyllobothriasis in Italy was carried out from March 2013 to December 2014. The aim of this study was to assess the diffusion of D. latum plerocercoids in the fish populations of the sub-alpine lakes of Maggiore, Como, Iseo and Garda, updating the scarce historical data and assessing a preliminary "risk level" of the lacustrine environments and fish species under investigation. A total of 2228 fish belonging to 5 species, 690 from Lake Maggiore, 500 from Lake Como, 655 from Lake Iseo and 383 from Lake Garda were submitted to parasitological examination. The presence of D. latum plerocercoid larvae was detected in 6.6%, 25.4% and 7.6% of perch (Perca fluviatilis) from Lakes Maggiore, Como and Iseo respectively. The parasite was also present in pike (Esox lucius) with prevalence values ranging from 71.4 to 84.2% and in 3.6-3.8% of burbot (Lota lota) from Lakes Iseo and Como. Fish from Lake Garda were negative as well as sampled whitefish (Coregonus lavaretus) and shad (Alosa fallax lacustris). The results of this survey showed a widespread presence of D. latum plerocercoid larvae in Maggiore, Como and Iseo fish populations. Urban fecal contamination of water is still a key issue to be resolved, together with the improvement of communication with consumers regarding the best dietary habits and the most effective processes of parasite inactivation, required for the consumption of raw/undercooked fish caught in high-risk areas.
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Affiliation(s)
- Andrea Gustinelli
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Italy.
| | - Vasco Menconi
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Italy
| | - Marino Prearo
- State Veterinary Institute of Piemonte, Liguria and Valle D'Aosta, via Bologna 148, Turin, Italy
| | - Monica Caffara
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Italy
| | - Marzia Righetti
- State Veterinary Institute of Piemonte, Liguria and Valle D'Aosta, via Bologna 148, Turin, Italy
| | - Tommaso Scanzio
- State Veterinary Institute of Piemonte, Liguria and Valle D'Aosta, via Bologna 148, Turin, Italy
| | - Annibale Raglio
- USC Microbiologia e Virologia, AOSP Papa Giovanni XXIII, Piazza OMS 1, Bergamo, Italy
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Yamasaki H, Kumazawa H, Sekikawa Y, Oda R, Hongo I, Tsuchida T, Saito N, Morishima Y, Sugiyama H. First confirmed human case of Diphyllobothrium stemmacephalum infection and molecular verification of the synonymy of Diphyllobothrium yonagoense with D. stemmacephalum (Cestoda: Diphyllobothriidea). Parasitol Int 2016; 65:412-21. [PMID: 27266483 DOI: 10.1016/j.parint.2016.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Revised: 06/02/2016] [Accepted: 06/02/2016] [Indexed: 11/18/2022]
Abstract
Several tapeworm species in the genus Diphyllobothrium Cobbold, 1858 have uncertain taxonomic positions, leading to taxonomic confusion as well as misdiagnosis of infections. Taxonomic revision based on DNA sequence analysis is considered necessary to resolve the taxonomy of several cases, including that between Diphyllobothrium stemmacephalum, the type species of the genus, and Diphyllobothrium yonagoense. Diphyllobothrium yonagoense was synonymized with D. stemmacephalum based on morphological observations by Andersen (1987), however no molecular studies have been undertaken to verify the validity of this synonymization. In the present study, the first human case confirmed molecularly as D. stemmacephalum infection is reported, and the validity of the synonymization of D. yonagoense with D. stemmacephalum was assessed based on molecular phylogenetics. Diphyllobothrium stemmacephalum and D. yonagoense grouped into the same clades with high bootstrap confidence values for both cox1 and nad3. Genetic distances between the two taxa were very small (0.000-0.012 and 0.000-0.017 for cox1 and nad3, respectively) and were considered to fall within the range of intraspecific variation. Using these molecular analyses, this study verified molecularly that D. yonagoense is a junior synonym of D. stemmacephalum. Further, the closer phylogenetic relationship between D. stemmacephalum and Diplogonoporus species rather than other diphyllobothriids, including Diphyllobothrium nihonkaiense and Diphyllobothrium latum, was corroborated. The genus name for D. nihonkaiense and D. latum is also discussed.
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Affiliation(s)
- Hiroshi Yamasaki
- Department of Parasitology, National Institute of Infectious Diseases, Tokyo 162-8640, Japan.
| | - Hideo Kumazawa
- Department of Parasitology, Faculty of Medicine, Kochi University, Kochi 783-8505, Japan
| | - Yoshiyuki Sekikawa
- Division of Infectious Diseases, Musashino Red Cross Hospital, Tokyo 180-8610, Japan
| | - Rentaro Oda
- Division of Infectious Diseases, Musashino Red Cross Hospital, Tokyo 180-8610, Japan
| | - Igen Hongo
- Division of Infectious Diseases, Musashino Red Cross Hospital, Tokyo 180-8610, Japan
| | - Takanobu Tsuchida
- Division of Clinical Laboratory, Japanese Red Cross Hadano Hospital, Kanagawa 257-0017, Japan
| | - Noriko Saito
- Laboratory of Electron Microscopy, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Yasuyuki Morishima
- Department of Parasitology, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Hiromu Sugiyama
- Department of Parasitology, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
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Zhang W, Che F, Tian S, Shu J, Zhang X. Molecular Identification of Diphyllobothrium nihonkaiense from 3 Human Cases in Heilongjiang Province with a Brief Literature Review in China. Korean J Parasitol 2015; 53:683-8. [PMID: 26797434 PMCID: PMC4725229 DOI: 10.3347/kjp.2015.53.6.683] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 09/01/2015] [Accepted: 10/17/2015] [Indexed: 11/23/2022]
Abstract
Human diphyllobothriasis is a widespread fish-borne zoonosis caused by the infection with broad tapeworms belonging to the genus Diphyllobothrium. In mainland China, so far 20 human cases of Diphyllobothrium infections have been reported, and the etiologic species were identified as D. latum and D. nihonkaiense based on morphological characteristics or molecular analysis. In the present study, proglottids of diphyllobothriid tapeworms from 3 human cases that occurred in Heilongjiang Province, China were identified as D. nihonkaiense by sequencing mitochondrial cytochrome c oxidase subunit I (cox1) and NADH dehydrogenase subunit 5 (nad5) genes. Two different cox1 gene sequences were obtained. One sequence showed 100% homology with those from humans in Japan. The remaining cox1 gene sequence and 2 different nad5 gene sequences obtained were not described previously, and might reflect endemic genetic characterizations. D. nihonkaiense might also be a major causative species of human diphyllobothriasis in China. Meanwhile, the finding of the first pediatric case of D. nihonkaiense infection in China suggests that infants infected with D. nihonkaiense should not be ignored.
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Affiliation(s)
- Weizhe Zhang
- Department of Parasitology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Fei Che
- Department of Neurology, the Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Song Tian
- Department of Animal Health Supervision, Heilongjiang Provincial Bureau of Animal Husbandry and Veterinary, Harbin, Heilongjiang, China
| | - Jing Shu
- Department of Parasitology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Xiaoli Zhang
- Department of Parasitology, Harbin Medical University, Harbin, Heilongjiang, China
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Hernández-Orts JS, Scholz T, Brabec J, Kuzmina T, Kuchta R. High morphological plasticity and global geographical distribution of the Pacific broad tapeworm Adenocephalus pacificus (syn. Diphyllobothrium pacificum): molecular and morphological survey. Acta Trop 2015; 149:168-78. [PMID: 26001974 DOI: 10.1016/j.actatropica.2015.05.017] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 05/11/2015] [Accepted: 05/16/2015] [Indexed: 11/17/2022]
Abstract
The most important causative agent of human diphyllobothriosis in South America, Diphyllobothrium pacificum, is transferred to the original genus Adenocephalus Nybelin, 1931; revised and redescribed on the basis of the evaluation of an extensive material collected mainly from northern fur seal, Callorhinus ursinus, from St. Paul Island, Alaska. Detailed analysis of morphological and morphometrical data shows a high variability in most of the characteristics traditionally used in diagnosis of diphyllobothriid tapeworms. Phylogenetic analyses based on newly characterised sequences of mitochondrial cytochrome c oxidase subunit 1 and nuclear large subunit ribosomal RNA genes consistently reveal Adenocephalus pacificus as a sister lineage to the clade formed of the remaining Diphyllobothrium species and other genera (Digramma, Diplogonoporus, Ligula). Despite the generally similar morphology, A. pacificus can be differentiated from the closely related taxa in the presence of transverse papilla-like tegumental protuberances distributed anteriorly, separated by narrow semicircular grooves on the ventral surface of proglottids between their anterior margin and the anterior edge of the male gonopore, and relatively small eggs. A. pacificus displays a relatively low host specificity (found in 9 of 16 otariids, and in accidental hosts such as man, dog and jackal, the latter representing a new host) and a uniquely wide geographical distribution on both hemispheres. In addition, suitability of morphological criteria used in diagnostics of diphyllobothriid cestodes is discussed.
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Affiliation(s)
- Jesús Servando Hernández-Orts
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Tomáš Scholz
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Jan Brabec
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Tetiana Kuzmina
- Schmalhausen Institute of Zoology NAS of Ukraine, vul. B. Khmelnyts'kogo, 15, Kyiv 01601, Ukraine
| | - Roman Kuchta
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic.
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Fang FC, Billman ZP, Wallis CK, Abbott AN, Olson JC, Dhanireddy S, Murphy SC. Human Diphyllobothrium nihonkaiense infection in Washington State. J Clin Microbiol 2015; 53:1355-7. [PMID: 25609724 PMCID: PMC4365193 DOI: 10.1128/jcm.00065-15] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A patient in Washington State harbored a fish tapeworm most likely acquired from eating raw salmon. Diphyllobothrium nihonkaiense was identified by cox1 sequence analysis. Although this is the first documented human D. nihonkaiense infection in the United States, the parasite may have been present earlier but misidentified as Diphyllobothrium latum.
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Affiliation(s)
- Ferric C Fang
- Department of Laboratory Medicine, University of Washington School of Medicine, Seattle, Washington, USA Department of Medicine, University of Washington School of Medicine, Seattle, Washington, USA Department of Microbiology, University of Washington School of Medicine, Seattle, Washington, USA Harborview Medical Center, Seattle, Washington, USA
| | - Zachary P Billman
- Department of Laboratory Medicine, University of Washington School of Medicine, Seattle, Washington, USA Center for Emerging and Reemerging Infectious Diseases, University of Washington School of Medicine, Seattle, Washington, USA
| | - Carolyn K Wallis
- Department of Laboratory Medicine, University of Washington School of Medicine, Seattle, Washington, USA Harborview Medical Center, Seattle, Washington, USA
| | - April N Abbott
- Department of Laboratory Medicine, University of Washington School of Medicine, Seattle, Washington, USA Harborview Medical Center, Seattle, Washington, USA
| | - John C Olson
- 45th Street Medical and Dental Clinic, Seattle, Washington, USA
| | - Shireesha Dhanireddy
- Department of Medicine, University of Washington School of Medicine, Seattle, Washington, USA Harborview Medical Center, Seattle, Washington, USA
| | - Sean C Murphy
- Department of Laboratory Medicine, University of Washington School of Medicine, Seattle, Washington, USA Department of Microbiology, University of Washington School of Medicine, Seattle, Washington, USA Center for Emerging and Reemerging Infectious Diseases, University of Washington School of Medicine, Seattle, Washington, USA
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13
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Chen S, Ai L, Zhang Y, Chen J, Zhang W, Li Y, Muto M, Morishima Y, Sugiyama H, Xu X, Zhou X, Yamasaki H. Molecular detection of Diphyllobothrium nihonkaiense in humans, China. Emerg Infect Dis 2014; 20:315-8. [PMID: 24447495 PMCID: PMC3901483 DOI: 10.3201/eid2002.121889] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The cause of diphyllobothriosis in 5 persons in Harbin and Shanghai, China, during 2008–2011, initially attributed to the tapeworm Diphyllobothrium latum, was confirmed as D. nihonkaiense by using molecular analysis of expelled proglottids. The use of morphologic characteristics alone to identify this organism was inadequate and led to misidentification of the species.
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14
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Bennett HM, Mok HP, Gkrania-Klotsas E, Tsai IJ, Stanley EJ, Antoun NM, Coghlan A, Harsha B, Traini A, Ribeiro DM, Steinbiss S, Lucas SB, Allinson KSJ, Price SJ, Santarius TS, Carmichael AJ, Chiodini PL, Holroyd N, Dean AF, Berriman M. The genome of the sparganosis tapeworm Spirometra erinaceieuropaei isolated from the biopsy of a migrating brain lesion. Genome Biol 2014; 15:510. [PMID: 25413302 PMCID: PMC4265353 DOI: 10.1186/preaccept-2413673241432389] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 10/28/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Sparganosis is an infection with a larval Diphyllobothriidea tapeworm. From a rare cerebral case presented at a clinic in the UK, DNA was recovered from a biopsy sample and used to determine the causative species as Spirometra erinaceieuropaei through sequencing of the cox1 gene. From the same DNA, we have produced a draft genome, the first of its kind for this species, and used it to perform a comparative genomics analysis and to investigate known and potential tapeworm drug targets in this tapeworm. RESULTS The 1.26 Gb draft genome of S. erinaceieuropaei is currently the largest reported for any flatworm. Through investigation of β-tubulin genes, we predict that S. erinaceieuropaei larvae are insensitive to the tapeworm drug albendazole. We find that many putative tapeworm drug targets are also present in S. erinaceieuropaei, allowing possible cross application of new drugs. In comparison to other sequenced tapeworm species we observe expansion of protease classes, and of Kuntiz-type protease inhibitors. Expanded gene families in this tapeworm also include those that are involved in processes that add post-translational diversity to the protein landscape, intracellular transport, transcriptional regulation and detoxification. CONCLUSIONS The S. erinaceieuropaei genome begins to give us insight into an order of tapeworms previously uncharacterized at the genome-wide level. From a single clinical case we have begun to sketch a picture of the characteristics of these organisms. Finally, our work represents a significant technological achievement as we present a draft genome sequence of a rare tapeworm, and from a small amount of starting material.
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Affiliation(s)
- Hayley M Bennett
- />Wellcome Trust Sanger Institute, Parasite Genomics, Cambridge, CB10 1SA UK
| | - Hoi Ping Mok
- />Department of Infectious Diseases, Addenbrooke’s NHS Trust, Cambridge, CB2 0QQ UK
| | | | - Isheng J Tsai
- />Wellcome Trust Sanger Institute, Parasite Genomics, Cambridge, CB10 1SA UK
- />Biodiversity Research Center, Academia Sinica, Taipei, 11529 Taiwan
| | - Eleanor J Stanley
- />Wellcome Trust Sanger Institute, Parasite Genomics, Cambridge, CB10 1SA UK
- />Eagle Genomics, Babraham Research Campus, Babraham, Cambridge, CB22 3AT UK
| | - Nagui M Antoun
- />Department of Radiology, Addenbrookes’s NHS Trust, Cambridge, CB2 0QQ UK
| | - Avril Coghlan
- />Wellcome Trust Sanger Institute, Parasite Genomics, Cambridge, CB10 1SA UK
| | - Bhavana Harsha
- />Wellcome Trust Sanger Institute, Parasite Genomics, Cambridge, CB10 1SA UK
| | - Alessandra Traini
- />Wellcome Trust Sanger Institute, Parasite Genomics, Cambridge, CB10 1SA UK
| | - Diogo M Ribeiro
- />Wellcome Trust Sanger Institute, Parasite Genomics, Cambridge, CB10 1SA UK
| | - Sascha Steinbiss
- />Wellcome Trust Sanger Institute, Parasite Genomics, Cambridge, CB10 1SA UK
| | - Sebastian B Lucas
- />Department of Histopathology, St Thomas’s Hospital, London, SE1 UK
| | - Kieren SJ Allinson
- />Department of Histopathology Section, Addenbrookes’s NHS Trust, Cambridge, CB2 0QQ UK
| | - Stephen J Price
- />Department of Neurosurgery, Addenbrookes’s NHS Trust, Cambridge, CB2 0QQ UK
| | - Thomas S Santarius
- />Department of Neurosurgery, Addenbrookes’s NHS Trust, Cambridge, CB2 0QQ UK
| | - Andrew J Carmichael
- />Department of Infectious Diseases, Addenbrooke’s NHS Trust, Cambridge, CB2 0QQ UK
| | - Peter L Chiodini
- />Hospital for Tropical Diseases and London School of Hygiene and Tropical Medicine, London, WC1E 6JD UK
| | - Nancy Holroyd
- />Wellcome Trust Sanger Institute, Parasite Genomics, Cambridge, CB10 1SA UK
| | - Andrew F Dean
- />Department of Histopathology Section, Addenbrookes’s NHS Trust, Cambridge, CB2 0QQ UK
| | - Matthew Berriman
- />Wellcome Trust Sanger Institute, Parasite Genomics, Cambridge, CB10 1SA UK
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15
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de Marval F, Gottstein B, Weber M, Wicht B. Imported diphyllobothriasis in Switzerland: molecular methods to define a clinical case of Diphyllobothrium infection as Diphyllobothrium dendriticum, August 2010. Euro Surveill 2013; 18:20355. [PMID: 23351654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
Following a first clinical case of infection by Diphyllobothrium dendriticum in Switzerland in 2006, we report a second case in the country. The species was identified by molecular methods. In the Swiss, French and Italian subalpine regions, human diphyllobothriasis has seen a comeback since the late 1980's, and Diphyllobothrium latum is usually considered the causative agent of the disease. In addition, several locally acquired and imported clinical infections due to allochthonous Diphyllobothrium species have been documented in the last years. Due to the colonisation potential of these parasites and their probably underestimated presence in the human population, there is a need for discriminating them at the medical laboratory level. Because the morphological characters are very similar among the different taxa, a correct identification requires the use of molecular methods. Molecular identification would improve diagnosis and help monitor the distribution of Diphyllobothrium species in Europe.
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16
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Ono S, Morimoto N, Korenaga M, Kumazawa H, Komatsu Y, Kuge I, Higashidani Y, Ogura K, Sugiura T. [Molecular identification of human Diphyllobothrium nihonkaiense using mitochondrial cytochrome c oxidase subunit 1 (cox1) gene sequence]. Rinsho Byori 2010; 58:1085-1092. [PMID: 21229706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Identification of Diphyllobothrium species has been carried out based on their morphology, especially sexual organs. In addition to these criteria, PCR-based identification methods have been developed recently. A 20 year-old Japanese living in Kochi Prefecture passed tapeworm. He was successfully treated with single dose of gastrografin. We examined the morphologic features of the proglottids and eggs using histology and scanning electron microscope. We also analyzed mitochondrial cytochrome c oxidase subunit 1 (cox1) gene of the proglottids. The causative tapeworm species was identified as D. nihonkaiense based on the results of morphologic features and genetic analysis. We discussed the advantage of PCR-based identification methods of Diphyllobothrium species using cox1 sequence in the clinical laboratory.
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Affiliation(s)
- Sayaka Ono
- Department of Clinical Laboratory, Kochi Medical School, Kochi University, Nankoku 783-8505, Japan
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17
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Matsuura T, Bylund G, Sugane K. Comparison of restriction fragment length polymorphisms of ribosomal DNA between Diphyllobothrium nihonkaiense and D. latum. J Helminthol 2009; 66:261-6. [PMID: 1363430 DOI: 10.1017/s0022149x00014693] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
ABSTRACTRestriction fragment length polymorphisms (RFLPs) of ribosomal DNA (rDNA) were compared between Diphyllobothrium latum and D. nihonkaiense using seven kinds of restriction endonucleases. No intra-specific variation in restriction fragment profiles was shown within both species of Diphyllobothrium. Digestion of the genomic DNA with three endonucleases, Smal, Hinfl and Hhal, provided one or two different bands between two species, although the hybridization patterns generated with the others, Hindlll, Xbal, Styl and Haelll, were the same in both. RFLPs in the digested profiles with Smal, Hinfl and Hhal could be used as species-specific markers even if only fragments of strobilae with morphological similarity were available. Other cestodes, Spirometra erinacei and Taenia saginata, used as controls showed quite different restriction fragment patterns with all the enzymes used.
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Affiliation(s)
- T Matsuura
- Department of Parasitology, Shinshu University School of Medicine, Matsumoto City, Nagano Prefecture, Japan
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18
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Wicht B, Scholz T, Peduzzi R, Kuchta R. First record of human infection with the tapeworm Diphyllobothrium nihonkaiense in North America. Am J Trop Med Hyg 2008; 78:235-238. [PMID: 18256421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023] Open
Abstract
The tapeworm Diphyllobothrium nihonkaiense (Cestoda: Diphyllobothriidea), originally described from Japan, is reported from a man in North America for the first time. Species identification was based on sequences of ribosomal (partial 18S rRNA) and mitochondrial (partial Cytochrome c Oxidase subunit I) genes of proglottids expelled from a Czech tourist who ate raw Pacific sockeye salmon (Oncorhynchus nerka) from British Columbia, Canada.
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Affiliation(s)
- Barbara Wicht
- Istituto Cantonale di Microbiologia, Bellinzona, Switzerland.
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19
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Wicht B, de Marval F, Gottstein B, Peduzzi R. Imported diphyllobothriasis in Switzerland: molecular evidence of Diphyllobothrium dendriticum (Nitsch, 1824). Parasitol Res 2007; 102:201-4. [PMID: 17805571 DOI: 10.1007/s00436-007-0745-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2007] [Accepted: 08/22/2007] [Indexed: 11/30/2022]
Abstract
We report for the first time in Switzerland a clinical case because of Diphyllobothrium dendriticum, identified by molecular methods. We discuss the potential for this imported species to infect local intermediate hosts and thus to achieve autochthonous cyclic transmission.
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Affiliation(s)
- Barbara Wicht
- Istituto Cantonale di Microbiologia, Via Mirasole 22a, 6500, Bellinzona, Switzerland.
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20
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Okamoto M, Iseto C, Shibahara T, Sato MO, Wandra T, Craig PS, Ito A. Intraspecific variation of Spirometra erinaceieuropaei and phylogenetic relationship between Spirometra and Diphyllobothrium inferred from mitochondrial CO1 gene sequences. Parasitol Int 2007; 56:235-8. [PMID: 17482507 DOI: 10.1016/j.parint.2007.03.003] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2006] [Revised: 03/26/2007] [Accepted: 03/27/2007] [Indexed: 11/18/2022]
Abstract
Spirometra erinaceieuropaei is a diphyllobothriid cestode whose adult stage occurs mainly in cat-like carnivores, but occasionally in canids and humans. Although it is generally accepted that the distribution of S. erinaceieuropaei is cosmopolitan, it is controversial as to whether all of S. erinaceieuropaei reported are the same species. This study determined partial sequences of the CO1 gene from several isolates in Asian countries and compared them to sequence data from the GenBank/EMBL/DDBJ nucleotide sequence database. Then intraspecific variation of S. erinaceieuropaei and its phylogenetic relationship with Diphyllobothrium were evaluated. The level of nucleotide variation in the CO1 gene sequences within S. erinaceieuropaei was less than 2.6%. Although it was a little larger than that within each species of Diphyllobothrium (0.1-1.0%), it was much smaller than the interspecific variation within the genus Diphyllobothrium (6.2-14%). These facts indicate that all isolates of S. erinaceieuropaei used in this study, which were collected from Asia, Australia and New Zealand, belong to the same species. Based on CO1 gene sequences, genus Spirometra is clearly separate from the genus Diphyllobothrium. It seems that the genus Spirometra is not a synonym of the genus Diphyllobothrium. The phylogenetic relationship between S. erinaceieuropaei and Sparganum proliferum inferred from the CO1 gene clearly confirm the previous opinion that S. proliferum is a distinct species from S. erinaceieuropaei.
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Affiliation(s)
- M Okamoto
- Department of Laboratory Animal Science, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Japan.
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21
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Wicht B, de Marval F, Peduzzi R. Diphyllobothrium nihonkaiense (Yamane et al., 1986) in Switzerland: First molecular evidence and case reports. Parasitol Int 2007; 56:195-9. [PMID: 17369079 DOI: 10.1016/j.parint.2007.02.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2006] [Revised: 02/06/2007] [Accepted: 02/06/2007] [Indexed: 11/19/2022]
Abstract
We report the first cases of locally-acquired Diphyllobothrium nihonkaiense (Yamane, Kamo, Bylund and Wikgren, 1986) in Switzerland, confirmed by genetic analysis (18S rRNA, COI and ITS1-5.8S rRNA-ITS2 genes). Diphyllobothriasis in this country is attributed to the tapeworm D. latum (Linnaeus, 1758) but the increasing popularity of raw fish culinary specialities (sushi, carpaccio, tartare) brings out a new diagnostic problem, so that people can get infected by exotic species of tapeworms.
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Affiliation(s)
- Barbara Wicht
- Istituto Cantonale di Microbiologia, Bellinzona, Switzerland.
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22
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Kim KH, Jeon HK, Kang S, Sultana T, Kim GJ, Eom K, Park JK. Characterization of the complete mitochondrial genome of Diphyllobothrium nihonkaiense (Diphyllobothriidae: Cestoda), and development of molecular markers for differentiating fish tapeworms. Mol Cells 2007; 23:379-90. [PMID: 17646713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023] Open
Abstract
We sequenced and characterized the complete mitochondrial genome of the Japanese fish tapeworm D. nihonkaiense. The genome is a circular-DNA molecule of 13607 bp (one nucleotide shorter than that of D. latum mtDNA) containing 12 protein-coding genes (lacking atp8), 22 tRNA genes and two rRNA genes. Gene order and genome content are identical to those of the other cestodes reported thus far, including its congener D. latum. The only exception is Hymenolepis diminuta in which the positions of trnS2 and trnL1 are switched. We tested a PCR-based molecular assay designed to rapidly and accurately differentiate between D. nihonkaiense and D. latum using species-specific primers based on a comparison of their mtDNA sequences. We found the PCR-based system to be very reliable and specific, and suggest that PCR-based identification methods using mtDNA sequences could contribute to the study of the epidemiology and larval ecology of Diphyllobothrium species.
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Affiliation(s)
- Kyu-Heon Kim
- Department of Parasitology and Medical Research Institute, College of Medicine, Chungbuk National University, Cheongju 361-763, Korea
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23
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Nakao M, Abmed D, Yamasaki H, Ito A. Mitochondrial genomes of the human broad tapeworms Diphyllobothrium latum and Diphyllobothrium nihonkaiense (Cestoda: Diphyllobothriidae). Parasitol Res 2007; 101:233-6. [PMID: 17252274 DOI: 10.1007/s00436-006-0433-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2006] [Accepted: 12/06/2006] [Indexed: 10/23/2022]
Abstract
Mitochondrial DNA (mtDNA) sequences of the human broad tapeworms Diphyllobothrium latum and Diphyllobothrium nihonkaiense have been totally determined. Both of them are closed circular molecules (total length, 13,720 bp in D. latum and 13,747 bp in D. nihonkaiense) containing genes for 12 proteins, 22 transfer RNAs, and two ribosomal RNAs. All the genes are coded on T-rich strand. The gene order of Diphyllobothrium mtDNAs is completely identical with that of Taenia and Echinococcus mtDNAs. The overall A + T contents of the genomes are 68.3% in D. latum and 67.8% in D. nihonkaiense. The pairwise divergence values of nucleotide sequences between these tapeworms ranged from 0.069 to 0.152 in protein-coding genes, demonstrating that D. nihonkaiense is a distinct species. The sequences determined in this study may provide useful marker systems for diagnostic, epidemiological, and phylogeographical studies of human diphyllobothriasis.
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Affiliation(s)
- Minoru Nakao
- Department of Parasitology, Asahikawa Medical College, Midorigaoka-Higashi 2-1, Asahikawa, Hokkaido 078-8510, Japan.
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Brabec J, Kuchta R, Scholz T. Paraphyly of the Pseudophyllidea (Platyhelminthes: Cestoda): Circumscription of monophyletic clades based on phylogenetic analysis of ribosomal RNA. Int J Parasitol 2006; 36:1535-41. [PMID: 17010350 DOI: 10.1016/j.ijpara.2006.08.003] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2006] [Revised: 08/03/2006] [Accepted: 08/04/2006] [Indexed: 11/22/2022]
Abstract
Phylogenetic relationships of cestodes of the order Pseudophyllidea (Platyhelminthes: Cestoda) were examined using sequences of complete small subunit and partial (D1-D3 region) large subunit nuclear rDNA of members of all pseudophyllidean families. The results provide evidence of paraphyly of the order as indicated by previous molecular phylogenetic analyses based on a much lower number of species sequenced. Pseudophyllidean tapeworms represent an artificial assemblage comprising two unrelated clades. "Bothriocephalidea" is formed by four families sensu Bray et al. (1994), namely Bothriocephalidae, Echinophallidae, Philobythiidae and Triaenophoridae, whereas two other families, Diphyllobothriidae and Cephalochlamydidae, give rise to the "Diphyllobothriidea". The present results indicate that "Bothriocephalidea" forms the most derived clade of all difossate and tetrafossate/bothriate tapeworm lineages which are considered to be basal relative to the rest of tetrafossate/bothridiate and acetabulate cestodes. By contrast, "Diphyllobothriidea", which includes medically important parasites (Diphyllobothrium and Spirometra), appeared more basal, without a clearly resolved position within other difossate tapeworm lineages.
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Affiliation(s)
- J Brabec
- Institute of Parasitology, Biology Centre of the Academy of Sciences of the Czech Republic, and Faculty of Biological Sciences, University of South Bohemia, Branisovská 31, 370 05 Ceské Budejovice, Czech Republic
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25
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Skeríková A, Brabec J, Kuchta R, Jiménez JA, García HH, Scholz T. Is the human-infecting Diphyllobothrium pacificum a valid species or just a South American population of the holarctic fish broad tapeworm, D. latum? Am J Trop Med Hyg 2006; 75:307-10. [PMID: 16896138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023] Open
Abstract
Using ITS2 gene sequences, the validity of the tapeworm Diphyllobothrium pacificum (Nybelin, 1931), infecting humans on the Pacific coast of South America and in Japan, was assessed. ITS2 sequences of this cestode differed markedly (sequence similarity 79.0-80.2%) from those of the most common human-infecting cestode, the broad fish tapeworm Diphyllobothrium latum (L.), as well as other four species of Diphyllobothrium, including potential human parasites (D. cordatum, D. dendriticum, and D. lanceolatum) and two species of Spirometra (sequence similarity 77.5-81.9%). Interspecific sequence similarity between all but one (D. pacificum) species was 86.1-99.6%, whereas individual isolates of D. dendriticum and D. ditremum exhibited intraspecific sequence similarity of 97.0-98.0% and 98.2-99.9%, respectively. Phylogenetic trees constructed from ITS2 sequences show a markedly distant position of D. pacificum from other species analyzed and also indicate the possible paraphyly of Spirometra.
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Affiliation(s)
- Andrea Skeríková
- Institute of Parasitology, Academy of Sciences of the Czech Republic and Faculty of Biological Sciences, University of South Bohemia, Ceské Budejovice, Czech Republic
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26
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Yera H, Estran C, Delaunay P, Gari-Toussaint M, Dupouy-Camet J, Marty P. Putative Diphyllobothrium nihonkaiense acquired from a Pacific salmon (Oncorhynchus keta) eaten in France; genomic identification and case report. Parasitol Int 2005; 55:45-9. [PMID: 16243582 DOI: 10.1016/j.parint.2005.09.004] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2005] [Revised: 08/23/2005] [Accepted: 09/14/2005] [Indexed: 11/23/2022]
Abstract
We report here a likely case of Diphyllobothrium nihonkaiense contracted in France through the consumption of a Pacific salmon imported from Canada. The species diagnosis was made by molecular analysis of two mitochondrial genes (COI & ND3). This case is rather unusual in that D. nihonkaiense has never been reported along the Pacific coast of North America.
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Affiliation(s)
- Hélène Yera
- Centre Hospitalier Universitaire Cochin, Université René Descartes, Paris, France
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27
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Logan FJ, Horák A, Stefka J, Aydogdu A, Scholz T. The phylogeny of diphyllobothriid tapeworms (Cestoda: Pseudophyllidea) based on ITS-2 rDNA sequences. Parasitol Res 2004; 94:10-5. [PMID: 15278441 DOI: 10.1007/s00436-004-1164-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2004] [Accepted: 05/11/2004] [Indexed: 10/26/2022]
Abstract
Phylogenetic analysis of sequences of the ITS-2 rRNA genes of 20 samples of pseudophyllidean cestodes of the family Diphyllobothriidae (Ligula, Digramma, Diphyllobothrium, and Schistocephalus) from different hosts and geographical regions revealed that: (1) the inclusion of ligulids (previously family Ligulidae) to the Diphyllobothriidae is correct; (2) Schistocephalus appears as the most basal taxon of the Diphyllobothriidae, well separated from Ligula and Digramma, thus supporting the validity of Schistocephalinae Dubinina, 1962; (3) Digramma belonged with samples of Ligula, thus suggesting its invalidity as a genus; and (4) isolates of Ligula, presumably belonging to Ligula intestinalis, are paraphyletic, indicating that this species may represent a complex of separate taxa. Our results indicate the necessity for a taxonomic revision of the family Diphyllobothriidae.
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Affiliation(s)
- Flora J Logan
- Institute of Parasitology, Academy of Sciences of the Czech Republic and Faculty of Biological Sciences, University of South Bohemia, Branisovská 31, 370 05 Ceské Budejovice, Czech Republic
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Ando K, Ishikura K, Nakakugi T, Shimono Y, Tamai T, Sugawa M, Limviroj W, Chinzei Y. Five cases of Diphyllobothrium nihonkaiense infection with discovery of plerocercoids from an infective source, Oncorhynchus masou ishikawae. J Parasitol 2001; 87:96-100. [PMID: 11227909 DOI: 10.1645/0022-3395(2001)087[0096:fcodni]2.0.co;2] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Five persons from 2 families residing at Miyama Town, Mie Prefecture, Japan, ingested fresh raw fish Oncorhynchus sp. on 9 May 1999 that was caught at Owase district in Mie. They all expelled diphyllobothriid cestodes 11-37 days after ingesting the fish. The parasites were morphologically identical to Diphyllobothrium nihonkaiense Yamane et al., 1986. Five plerocercoids were detected from a portion of the fish. Nucleotide sequence of a region of the cytochrome c oxidase subunit I gene of mitochondrial DNA from an adult worm was identical with that from the plerocercoid. The fish was identified as Oncorhynchus masou ishikawae according to the nucleotide sequence of the nuclear ribosomal second internal transcribed spacer region II gene. This is the first record of D. nihonkaiense plerocercoids from O. m. ishikawae.
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Affiliation(s)
- K Ando
- Department of Medical Zoology, School of Medicine, Mie University, Tsu, Japan
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Wahlberg MH. Three main patterns in the expression of six actin genes in the plerocercoid and adult Diphyllobothrium dendriticum tapeworm (Cestoda). Mol Biochem Parasitol 1997; 86:199-209. [PMID: 9200126 DOI: 10.1016/s0166-6851(97)00034-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The expression of six actin genes was examined in adult and plerocercoid Diphyllobothrium dendriticum tapeworms using in situ hybridization. On the basis of their structures, these genes are divided into three groups, the cestoda-I, -II and -III actins. Current studies show that the expression of actins belonging to different groups vary to a great extent. The three cestoda-I actins are expressed primarily in muscle cells of both adult and plerocercoid tapeworms, the expression being restricted to fewer cells in the plerocercoid larva. The two cestoda-II actins are cytoplasmic actin isoforms, expressed in a variety of cells, i.e. in cells dividing, differentiating and migrating. Expression of the cestoda-III actin gene is detected merely in the peripheral part of the outer parenchyma, mainly in the tegument cell bodies. This pattern is very weak in plerocercoids. The results indicate that actins also in D. dendriticum can be divided into cytoplasmic and muscle-specific isoforms. In this organism, one major pattern of muscle actin gene expression (cestoda-I) and two major patterns of non-muscle actin gene expression (cestoda-II and -III) were found.
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Affiliation(s)
- M H Wahlberg
- Abo Akademi University, Department of Biology, Abo/Turku, Finland.
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Wahlberg MH, Johnson MS. Isolation and characterization of five actin cDNAs from the cestode Diphyllobothrium dendriticum: a phylogenetic study of the multigene family. J Mol Evol 1997; 44:159-68. [PMID: 9069176 DOI: 10.1007/pl00006132] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Five cDNAs (pDidact2-pDidact6), representing different actin genes, were isolated from a Diphyllobothrium dendriticum cDNA library, and the DNA as well as the putative amino acid sequences were determined. The corresponding Didact2 and Didact4 genes code for peptides 376 amino acids long, with molecular weights 41,772 and 41,744 Da, respectively, while the deduced Didact3 protein is 377 amino acids long and weighs 41,912 Da. The pDidact5 and -6 cDNAs lack nucleotides corresponding to three to six amino acids at the amino-terminus. Two of the five cDNAs contain the conventional AATAAA as the putative polyadenylation signal, one has the common variant ATTAAA, whereas the hexanucleotide AATAGA is found 15 and 18 nucleotides, respectively, upstream of the poly(A) site in two of the cDNAs. Phylogenetic studies including 102 actin protein sequences revealed that there are at least four different types of cestode actins. In this study three of these types were found to be expressed in the adult D. dendriticum tapeworm. Structurally the cestode actin groupings differ from each other to an extent seen only among the metazoan actins between the vertebrate muscle and cytoplasmic isoforms. In the phylogenetic trees constructed, cestode actins were seen to map to two different regions, one on the border of the metazoan actins and the other within this group. It is, however, difficult to say whether the cestode actins branched off early in the metazoan evolution or if this position in the phylogenetic tree only reflects upon differences in evolutionary rate.
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Affiliation(s)
- M H Wahlberg
- Department of Biology, Abo Akademi University, Abo/Turku, Finland
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Wahlberg MH, Karlstedt KA, Paatero GI. Cloning, sequencing and characterization of an actin cDNA in Diphyllobothrium dendriticum (Cestoda). Mol Biochem Parasitol 1994; 65:357-60. [PMID: 7969276 DOI: 10.1016/0166-6851(94)90086-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- M H Wahlberg
- Abo Akademi University, Department of Biology, Abo/Turku, Finland
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Abstract
Nondenatured and denatured total RNA from the tapeworm Diphyllobothrium dendriticum (Cestoda) was analysed by agarose gel electrophoresis. It was found that the large subunit ribosomal RNA (lrRNA) is 28.0S and the small subunit ribosomal RNA (srRNA) is 19.5S. Following denaturation the 28.0S rRNA was disrupted into a 19.5S subfragment and a 20.7S subfragment due to the presence of a centrally located hidden break. By hybridization of Northern blot membranes with oligonucleotide probes specific for the 5'- and 3'-ends of the lrRNA respectively, we have shown that the 19.5S subfragment is from the 5'-end (the alpha-subfragment) and the 20.7S subfragment from the 3'-end (the beta-subfragment) of the 28.0S rRNA of D. dendriticum.
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Affiliation(s)
- K A Karlstedt
- Department of Biology, Abo Akademi University, Finland
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