First confirmed human case of Diphyllobothrium stemmacephalum infection and molecular verification of the synonymy of Diphyllobothrium yonagoense with D. stemmacephalum (Cestoda: Diphyllobothriidea)

Yamasaki, Hiroshi; Kumazawa, Hideo; Sekikawa, Yoshiyuki; Oda, Rentaro; Hongo, Igen; Tsuchida, Takanobu; Saito, Noriko; Morishima, Yasuyuki; Sugiyama, Hiromu

doi:10.1016/j.parint.2016.06.003

Cited by 12 publications

(7 citation statements)

References 20 publications

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“…The only obvious differences were the smaller size of eggs and size proportion of cirrus sac versus seminal vesicle. Diphyllobothriid species egg size was previously shown to be intraspecific and host-related highly variable (Hernandez-Orts et al, 2015;Leštinová et al, 2016;Yamasaki et al, 2016). However, maximum length of eggs from "Diphyllobothrium" sp.…”

Section: 4(6)mentioning

confidence: 99%

Gastrointestinal Parasites and Bacteria in Free-Living South American Sea Lions (Otaria flavescens) in Chilean Comau Fjord and New Host Record of a Diphyllobothrium scoticum-Like Cestode

et al. 2018

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Present study aimed to characterize gastrointestinal parasites and culturable bacteria from free-living South American sea lions (Otaria flavescens) inhabiting waters of Comau Fjord, Patagonia, Chile. Therefore, a total of 28 individual fecal samples were collected from sea lions within their natural marine habitat during several diving expeditions. Using classical parasitological techniques, study revealed infections with five different gastrointestinal parasite genera. In addition, bacterial cultures showed presence of at least 28 different bacterial genera. Referring to parasites, protozoan, and metazoan species were found with some of them bearing anthropozoonotic potential and/or pathogenic impact for these marine mammals. As such, four of identified parasite genera harbored zoonotic potential (i.e., Entamoeba, Balantidium, Diphyllobothrium, Anisakis) and one genus (Parafilaroides) represented a specific lungworm of marine pinnipeds. Proglottids from fecal samples showed high morphological homology to "Diphyllobothrium" scoticum (Rennie and Reid, 1912; Meggitt, 1924), which was found in Antarctic sea leopards (Hydrurga leptonyx; Phocidae), but contained eggs of smaller size. Molecular characterization revealed 97-100% identity to a new "Diphyllobothrium" species which was recently isolated from a Californian sea lion (Zalophus californianus; Otariidae) in San Francisco. As such, O. flavescens represents a new host record for this parasite species. Furthermore, potential zoonotic bacteria (i.e., Clostridium, Escherichia, Vibrio, Yersinia, Salmonella) were identified amongst others in O. flavescens indicating a reservoir role for these pinnipeds in marine ecosystem. Current data should be considered as a baseline study for future monitoring surveys on anthropozoonotic pathogens circulating in wild free-living sea lions and their possible impact on public health issues and marine wildlife.

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Section: 4(6)mentioning

confidence: 99%

Gastrointestinal Parasites and Bacteria in Free-Living South American Sea Lions (Otaria flavescens) in Chilean Comau Fjord and New Host Record of a Diphyllobothrium scoticum-Like Cestode

et al. 2018

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“…These parasites are broad tapeworms, which have a complex life cycle with various definitive hosts over the world (various marine or terrestrial mammals, birds and even reptiles), depending on the genus and species [9]. Overall 16 species from three genera (Adenocephalus, Diphyllobothrium, and Dibothriocephalus), have been recorded from humans [9][10][11][12], but only six species are commonly diagnosed in humans, namely Adenocephalus pacificus, Diphyllobothrium balaenopterae, Dibothriocephalus dendriticus, Dibothriocephalus latus, Dibothriocephalus nihonkaiensis (previously named Diphyllobothrium pacificum, Diplogonoporus balaenopterae, Diphyllobothrium dendriticum, Diphyllobothrium latum and Diphyllobothrium nihonkaiense, respectively) and Diphyllobothrium stemmacephalum [9]. The recent taxonomic change which has occurred in 2017, consecutive to the work of Waeschenbach et al allowed to differentiate species with marine definitive hosts (Diphyllobothrium genus) from species with terrestrial definitive hosts (Dibothriocephalus genus) [9].…”

Section: On Parasites and Fishesmentioning

confidence: 99%

Dibothriocephalus nihonkaiensis: an emerging concern in western countries?

Robert‐Gangneux

Autier

Gangneux

2019

Expert Review of Anti-infective Therapy

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“…Besides infections with D. nihonkaiense tapeworm, the following rare and autochthonous cestodes have been sporadically reported in humans in Japan: Diphyllobothrium stemmacephalum ( 36 ), Adenocephalus pacificus ( 37 ), Dip. balaenopterae ( 38 ), and Spirometra spp.…”

Section: Perspectives Of Diphyllobothriasismentioning

confidence: 99%

Epidemiology ofDiphyllobothrium nihonkaienseDiphyllobothriasis, Japan, 2001–2016

Ikuno¹,

Akao²,

Yamasaki³

2018

Emerg. Infect. Dis.

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First confirmed human case of Diphyllobothrium stemmacephalum infection and molecular verification of the synonymy of Diphyllobothrium yonagoense with D. stemmacephalum (Cestoda: Diphyllobothriidea)

Cited by 12 publications

References 20 publications

Gastrointestinal Parasites and Bacteria in Free-Living South American Sea Lions (Otaria flavescens) in Chilean Comau Fjord and New Host Record of a Diphyllobothrium scoticum-Like Cestode

Gastrointestinal Parasites and Bacteria in Free-Living South American Sea Lions (Otaria flavescens) in Chilean Comau Fjord and New Host Record of a Diphyllobothrium scoticum-Like Cestode

Dibothriocephalus nihonkaiensis: an emerging concern in western countries?

Epidemiology ofDiphyllobothrium nihonkaienseDiphyllobothriasis, Japan, 2001–2016

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