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An egg of dwarf tapeworm. Hymenolepis nana, like all tapeworms, contains both male and female reproductive structures in each proglottid. This means that the dwarf tapeworm, like other tapeworms is hermaphroditic. Each segment contains three testes and a single ovary.
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 .
In human adults, the tapeworm is more of a nuisance than a health problem, but in small children, many H. nana worms can be dangerous. Usually, the larvae of this tapeworm cause the most problem in children; they burrow into the walls of the intestine, and if enough tapeworms are present in the child, severe damage can be inflicted.
D. latum is the longest tapeworm in humans, averaging ten meters long. Unlike many other tapeworms, Diphyllobothrium eggs are typically unembryonated when passed in human feces. [4] In adults, proglottids are wider than they are long (hence the name broad tapeworm). As in all pseudophyllid cestodes, the genital pores open midventrally. [5]
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
Eggs collected from proglottids of Bertiella studeri. Left panel shows the length of the egg, scale bar = 10 μm; middle panel shows the hooklets in the egg; right panel shows the pyriform apparatus in the egg (under convert microscope). Source Sun X, Fang Q, Chen X-Z, Hu S-F, Xia H, Wang X-M. Bertiella studeri infection, China [letter].
Or, the infected person’s dirty hands can contaminate food or water with tapeworm eggs. “Either way, the baby tapeworms (larvae) that come out of the eggs are tiny enough to break through the ...
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.
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