Who discovered Diphyllobothrium latum?

The fish was shown to contain the stage that transmits the parasite to humans by Braun (1883) who fed plerocercoids from fish to cats, dogs, and medical students. The role of the copepod as the first intermediate host was elucidated by Janicki (1917) and Rosen (1917).

What is Diphyllobothrium latum intermediate host?

of Diphyllobothrium latum The life cycle of the parasite (Figure 1) involves a definitive host(2): humans (and other fish-eating mammals) and at least two intermediate hosts (3): a planktonic crustacean and one or more freshwater fish.

How is Diphyllobothrium latum acquired?

Diphyllobothrium latum (D. latum), which is the most common cause of diphyllobothriasis, also called the “fish tapeworm” or the “broad tapeworm,” is transmitted to humans by the ingestion of fish that harbor infectious larvae of the genus Diphyllobothrium causing a wide-ranging spectrum of disease and severity.

What is the common name of Diphyllobothrium latum?

broad fish tapeworm
Dibothriocephalus latus (=Diphyllobothrium latum), the “broad fish tapeworm”, is usually assumed to be the most common agent of human diphyllobothriasis.

What is the infective form of Diphyllobothrium latum?

The plerocercoid larvae are the infective stage for humans.

What does Diphyllobothrium latum cause?

Diphyllobothrium latum and related species (the fish or broad tapeworm), the largest tapeworms that can infect people, can grow up to 30 feet long. While most infections are asymptomatic, complications include intestinal obstruction and gall bladder disease caused by migration of proglottids.

What is the intermediate host of hymenolepis Nana?

Hymenolepis nana and H. diminuta are rodent tapeworms that use fleas and beetles as intermediate hosts.

Why is Diphyllobothrium latum unique?

The fish tapeworm, orDiphyllobothrium latum, holds the dubious honor for longest tapeworm known to humankind, with adult worms measuring up to 10 to 25 m. The adult tapeworms consist of 3000 to 4000 proglottids and produce up to 1 million eggs a day; they may survive for decades in the human host.

How do you know if you have Diphyllobothrium latum?

How is infection with Diphyllobothrium diagnosed? Diagnosis is made by identification of eggs or segments of the tapeworm in a stool sample with a microscope. Eggs are usually numerous, but more than one stool sample may be needed to find them.

What are the characteristics of Diphyllobothrium latum?

Physical Description. The adult Diphyllobothrium latum may reach up to 12 meters, increasing throughout its life. These whitish/yellow worms are dorso-ventrally flattened, and much more narrow than they are long. They have no oral opening, thus feeding through absorption.

Can eating sushi cause tapeworms?

And the CDC warned, “The risk of becoming infected with the Japanese tapeworm parasite is most prevalent when consuming raw or undercooked fish, particularly in dishes such as sushi, sashimi and ceviche.” The CDC says the parasite and the larvae that are buried deep in salmon muscle can be destroyed when fish is …

How can you prevent Diphyllobothrium latum?

How can I prevent Diphyllobothrium infection? Do not eat raw or undercooked fish. The FDA recommends the following for fish preparation or storage to kill parasites. Cook fish adequately (to an internal temperature of at least 145° F [~63° C]).

What is the definitive host of Hymenolepis diminuta?

diminuta involves rodents (rats primarily) as the definitive host and beetles (flour and grain beetles, Tribolium spp.

What is the prevention of Diphyllobothrium latum?

What is the treatment for Diphyllobothrium latum?

Treatment of diphyllobothriasis is with a single oral dose of praziquantel 5 to 10 mg/kg. Alternatively, a single 2-g dose of niclosamide (unavailable in the US) is given as 4 tablets (500 mg each) that are chewed one at a time and swallowed. For children, the dose is 50 mg/kg (maximum 2 g) once.

What is the morphology of Diphyllobothrium latum?

The adult worm is composed of three fairly distinct morphological segments: the scolex (head), the neck, and the lower body. Each side of the scolex has a slit-like groove, which is a bothrium for attachment to the intestine. The scolex attaches to the neck, or proliferative region.

Can sushi give you a tapeworm?

Diphyllobothriasis is infection of the small intestine by the broad tapeworm Diphyllobothrium spp acquired from eating undercooked or raw fish. With the increasing popularity of sushi and sashimi, it can be expected that diphyllobothriasis will become more common.