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Eucestoda, commonly referred to as tapeworms, is the larger of the two subclasses of flatworms in the class Cestoda (the other subclass being Cestodaria). Larvae have six posterior hooks on the scolex (head), in contrast to the ten-hooked Cestodaria .
The tapeworm eggs are present in the feces of a person infected with the adult worms, a condition known as taeniasis. [2] [8] Taeniasis, in the strict sense, is a different disease and is due to eating cysts in poorly cooked pork. [1] People who live with someone with pork tapeworm have a greater risk of getting cysticercosis. [8]
Taenia solium, the pork tapeworm, belongs to the cyclophyllid cestode family Taeniidae.It is found throughout the world and is most common in countries where pork is eaten. . It is a tapeworm that uses humans (Homo sapiens) as its definitive host and pigs (family Suidae) as the intermediate or secondary hos
Under certain circumstances, specifically for the pork tapeworm, the eggs can be accidentally eaten by humans through contaminated foodstuffs. In such case, the eggs hatch inside the body, generally moving to muscles as well as inside the brain. Such brain infection can lead to a serious medical condition called neurocysticercosis. [1]
The definitive hosts for these Taenia species are canids. The adult tapeworms live in the intestines of animals like dogs, foxes, and coyotes. Intermediate hosts such as rabbits, goats, sheep, horses, cattle and sometimes humans get the disease by inadvertently ingesting tapeworm eggs (gravid proglottids) that have been passed in the feces of an infected canid.
Taenia pisiformis, commonly called the rabbit tapeworm, is an endoparasitic tapeworm which causes infection in lagomorphs, rodents, and carnivores. Adult T. pisiformis typically occur within the small intestines of the definitive hosts , the carnivores.
Taeniasis is an infection within the intestines by adult tapeworms belonging to the genus Taenia. [2] [3] There are generally no or only mild symptoms. [2] Symptoms may occasionally include weight loss or abdominal pain. [1] Segments of tapeworm may be seen in the stool. [1] Complications of pork tapeworm may include cysticercosis. [1]
A pair of tapeworm proglottids. Taenia taeniaeformis is a parasitic tapeworm, with cats as the primary definitive hosts. Sometime dogs can also be the definitive host. The intermediate hosts are rodents and less frequently lagomorphs (rabbits). The definitive host must ingest the liver of the intermediate host in order to acquire infection. [1]
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