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a genus of large tapeworms. D. la´tum is the broad or fish tapeworm, an intestinal parasite of humans, dogs, cats, and other fish-eating mammals.


A large genus of tapeworms characterized by a spatulate scolex with dorsal and ventral sucking grooves or bothria. Several species are found in humans, although only one, Diphyllobothrium latum, is of widespread importance. Abbreviated taxonomy: Platyhelminthes, Cestoda, Eucestoda, Pseudophyllidea, Diphyllobothriidae, Diphyllobothrium
[G. di-, two, + phyllon, leaf, + bothrion, little ditch]


/Di·phyl·lo·both·ri·um/ (-both´re-um) a genus of large tapeworms, including D. la´tum (broad or fish tapeworm), found in the intestine of humans, cats, dogs, and other fish-eating mammals; its first intermediate host is a crustacean and the second a fish, the infection in humans being acquired by eating inadequately cooked fish.


Etymology: Gk, di, twice, phyllon, leaf, bothrion, pit
a genus of large parasitic intestinal flatworms having a scolex with two slitlike grooves. The species that most often infects humans is Diphyllobothrium latum, a giant freshwater fish tapeworm of North America and Europe. See also fish tapeworm infection.
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Diphyllobothrium latum egg


A large genus of tapeworms (order Pseudophyllidea) characterized by a spatulate scolex with dorsal and ventral sucking grooves, or bothria. Several species are found in humans, although only one, Diphyllobothrium latum, is of widespread importance.
[G. di-, two, + phyllon, leaf, + bothrion, little ditch]


(di-fil?o-bo`th're-um) [L. Diphyllobothrium, fr di- + Gr. phyllon, leaf + Gr. bothrion, pit]
A genus of tapeworm of the order Pseudophyllidea, marked by a scolex with two bothria (slitlike grooves). The genus was formerly called Dibothriocephalus.

Diphyllobothrium cordatum

A species infesting dogs and seals in Greenland. The plerocercoids are occasionally found in humans. Synonym: heart-shaped tapeworm

Diphyllobothrium erinacei

A species infesting dogs, cats, and other carnivores. Larval stages are occasionally found in humans.
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DIPHYLLOBOTHRIUM LATUM: Passed in patient's stool.

Diphyllobothrium latum

A species that is native to Scandinavia, the Baltics, and western Russia, and is now found in North America, esp. the Pacific Northwest, that infests fish and mammals. The adult lives in the intestine of fish-eating mammals, including humans. It is the largest tapeworm infesting humans and may reach a length of 50 to 60 ft (15.2 to 18.3 m); the average is 20 ft (6.1 m). The eggs develop into ciliated larvae that are eaten by small crustaceans called copepods. The larvae pass through several stages in the copepods and develop further after the copepods are eaten by fish, finally encysting in fish muscle. People acquire the infection by eating raw or poorly cooked fish that contains cysts. Infection can be prevented by thoroughly cooking all freshwater fish or by keeping the fish frozen at -10°C (14°F) for 48 hr before eating. Synonym: broad tapeworm; fish tapeworm See: illustration


Patients often report abdominal pain, weight loss, digestive disorders, progressive weakness, and symptoms of pernicious anemia because the worm absorbs ingested vitamin B12 from the gastrointestinal tract.


Praziquantel is used to treat the infestation.



a genus of long tapeworms in the family Diphyllobothriidae.

Diphyllobothrium dalliae, Diphyllobothrium dendriticum, Diphyllobothrium pacificum, Diphyllobothrium strictum, Diphyllobothrium minus, Diphyllobothrium ursi
are all tapeworms of fish-eating mammals including humans.
Diphyllobothrium erinacei
Diphyllobothrium latum
the broad or fish tapeworm, a species found in the small intestines of humans, dogs, cats and other fish-eating mammals.
References in periodicals archive ?
Five cases of Diphyllobothrium nihonkaiense infection with discovery of plerocercoids from an infective source, Oncorhynchus masou ishikawae.
Mitochondrial genomes of the human broad tapeworms Diphyllobothrium latum and Diphyllobothrium nihonkaiense (Cestoda: Diphyllobothriidae).
Prevalence of infection by Diphyllobothrium latum, L, 1758 among perches (Perca fluvialitis) from the Leman Lake.
During the past 55 years, work by Chilean parasitologists has demonstrated that native species and introduced salmonid fish are infested with Diphyllobothrium plerocercoids in these lakes (11-14).
pacificum have been found in humans in South America; other species of Diphyllobothrium have been found in freshwater fish from Chile and Argentina (9,10).
Another case in a student from Trujillo, Peru was erroneously reported as having been caused by Diphyllobothrium latum (Linnaeus, 1758) (4).
A case of Diphyllobothrium latum infection with a brief review of diphyllobothriasis in the Republic of Korea.
Cooking or Freezing Fish at Minus 31 Degrees Fahrenheit or Colder for 15 Hours Will Kill Diphyllobothrium Larvae
To the Editor: Diphyllobothriosis, infection by tapeworms of the genus Diphyllobothrium (Cestada: Di phyllobothriidea) (7), is a well-known disease of humans.
Diphyllobothriasis, or fish tapeworm disease, was traditionally associated with gefilte fish preparation by Jewish women; approximately 10% of people in Scandinavia are reportedly infected with Diphyllobothrium (Fleming et al.
Diphyllobothriosis is a fishborne cestodiasis caused by infection with adult tapeworms belonging to the genus Diphyllobothrium Cobbold, 1858 (1-5); the most frequent etiologic agents are D.