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Life cycle of the eucestode Taenia: Inset 5 shows the scolex, a disk with hooks on the end. Inset 6 shows the tapeworm's whole body, in which the scolex is the tiny, round tip in the top left corner, and a mature proglottid has just detached. [19] Life cycle of Diphyllobothrium latum relies on at least three hosts, crustaceans, fish, and humans ...
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. All tapeworms are endoparasites of vertebrates, living in the digestive tract or related ducts.
The life cycle of F. liguloides begins by Artemia ingesting the cestode larva, called oncosphere. It then penetrates the intestinal wall into the hemocoel where it becomes a cysticercoid, or larva with a scolex. The larva reaches maturity in the digestive tract of the flamingo (definitive host).
Cyclophyllidea (the cyclophyllid cestodes) is the order of Cestoda (tapeworm).It is the largest and most diverse order of Cestoda (tapeworm), encompassing species that infect all classes of terrestrial tetrapods including humans and domesticated animals, [1] and includes species with some of the most severe health impact on wildlife, livestock, and humans.
Life cycle of H. nana inside and outside of the human body Hymenolepis nana life cycle. Infection is acquired most commonly from eggs in the feces of another infected individual, which are transferred in food, by contamination. Eggs hatch in the duodenum, releasing oncospheres, which penetrate the mucosa and come to lie in lymph channels of the ...
Echinococcus granulosus, also called the hydatid worm or dog tapeworm, is a cyclophyllid cestode that dwells in the small intestine of canids as an adult, but which has important intermediate hosts such as livestock and humans, where it causes cystic echinococcosis, also known as hydatid disease.
The adult cestode produces eggs which are spread into the environment by the feces of the definitive host. This life cycle is also very similar to T. pisiformis a canine and rabbit infecting parasite; however, T. pisiformis infected the body cavity of the rabbit and T. serialis infects muscle and subcutaneous tissue.
Cestodes have a dorso-ventrally flattened shape. Cestodes are segmented worms, and their bodies are divided into three distinct regions: the scolex, the neck, and the strobila. The scolex is the head of the cestode, and it functions as a holdfast organ that is specialized to attach to intestines using a variety of mechanisms.