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.
What is the morphology of Diphyllobothrium Latum?
latum is spoon-shaped with a pair of grooves or bothria in the anterior portion, which it uses as an organ of attachment. No suckers or hooklets are present, as are commonly found in the other species of cestodes.
What is the diagnostic stage of Diphyllobothrium Latum?
Immature eggs are passed in feces . Under appropriate conditions, the eggs mature (approximately 18 to 20 days) and yield oncospheres which develop into a coracidia . After ingestion by a suitable freshwater crustacean (the copepod first intermediate host) the coracidia develop into procercoid larvae .
What is Diphyllobothrium Latum intermediate host?
The size and shape of this larva may help identify the infecting species of Diphyllobothrium. Depending on the parasite species, freshwater, anadromous, or marine fish are second intermediate hosts. The second intermediate hosts for D. latum are freshwater fish such as trout, pike, turbot, and perch; D.
Which information is true about Diphyllobothrium Latum?
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 life cycle of Diphyllobothrium Latum?
The life cycle of D. latum, as it relates to humans, begins when un-embryonated eggs are released into the feces of humans that were infected with the intestinal parasite. These eggs will become embryonated in water under appropriate conditions, with the process usually lasting 18 to 20 days.
What is the common name of Diphyllobothrium Latum?
Dibothriocephalus latus (=Diphyllobothrium latum), the “broad fish tapeworm”, is usually assumed to be the most common agent of human diphyllobothriasis.
What is the infective stage of Diphyllobothrium Latum in man?
The procercoid larva are then released from the crustacean into the fish. The larvae continue to develop in the flesh of the fish, developing into the plerocercoid stage, which is the infective stage for humans.
What disease does Diphyllobothrium Latum cause?
What does Diphyllobothrium Latum cause?
What is epidemiology of Diphyllobothrium Latum?
Epidemiology. Diphyllobothriasis can affect any age group and gender, but the majority of identified cases were middle-aged men. This parasitic infection can be a public health issue for residents and travelers in endemic as well as non-endemic regions. The fish tapeworm, D.
How do you get Diphyllobothrium latum?
Diphyllobothrium latum. Infection with the adult worm is acquired by the ingestion of raw, poorly cooked, or pickled salmon, trout, perch, pike, white fish, grayling, ruff, eel, etc., harboring the plerocercoid larvae. After five or six weeks, the larva matures to the adult worm. Both eggs and proglottids are passed in the stool.
How do diphyllobothriids attach to the mucosa?
Adult diphyllobothriids attach to the intestinal mucosa by means of two bilateral groves (bothria) of their scolex . The adults can reach more than 10 m in length, with more than 3,000 proglottids. Immature eggs are discharged from the proglottids (up to 1,000,000 eggs per day per worm) and are passed in the feces.
What is the life cycle of dendrobacterium latum?
Life Cycle: The adults of D. latum attach to the intestinal mucosa by means of the two bilateral groves (bothria) of their scolex . The adults can reach more than 10 m in length, with more than 3,000 proglottids. Immature eggs are discharged from the proglottids (up to 1,000,000 eggs per day per worm) and are passed in the feces .
What does the egg of diphyllobothriumlatum look like?
The egg of Diphyllobothriumlatum resembles the egg of a digenetic trematode, that is, it is oval and possesses a distinct operculum at one pole of the shell. The eggs are light brown and have dimensions that average 67-71 µm by 40-51 µm. The eggs tend to be rounded at one end.
