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Rat Tapeworm
''Hymenolepis diminuta'', also known as rat tapeworm, is a species of '' Hymenolepis'' tapeworm that causes hymenolepiasis. It has slightly bigger eggs and proglottids than '' H. nana'' and infects mammals using insects as intermediate hosts. The adult structure is 20 to 60 cm long and the mature proglottid is similar to that of ''H. nana'', except it is larger. ''Hymenolepis diminuta'' is prevalent worldwide, but only a few hundred human cases have been reported. Few cases have ever been reported in Australia, United States, Spain, and Italy. In countries such as Malaysia, Thailand, Jamaica, Indonesia, the prevalence is higher.Tena D, Pιrez Simón M, Gimeno C, Pιrez Pomata MT, Illescas S, Amondarain I, et al. Human infection with Hymenolepis diminuta : Case report from Spain. J Clin Microbiol 1998;36:2375-6.Marangi M, Zechini B, Fileti A, Quaranta G, Aceti A. Hymenolepis diminuta infection in a child living in the urban area of Rome, Italy. J Clin Microbi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hymenolepis (tapeworm)
''Hymenolepis'' is a genus of cyclophyllid tapeworms responsible for hymenolepiasis. They are parasites of humans and other mammals. The focus in this article is in ''Hymenolepis'' commonly parasitizing humans. Species include: * '' Hymenolepis apodemi'' - in rodents * '' Hymenolepis asymetrica'' — in rodents * ''Hymenolepis diminuta'' — in humans * '' Hymenolepis horrida'' — in rodents * '' Hymenolepis rymzhanovi'' - in rodents * '' Hymenolepis microstoma'' — in rodents * ''Hymenolepis nana'' — in humans Signs and symptoms Most infections do not have many worms and therefore can have no symptoms. Patients with more than 15,000 eggs per gram of stool may experience cramps, diarrhea, irritability, anorexia, or enteritis caused by cystercoids destroying the intestinal villi in which they develop. Cause Hymenolepiasis is the most common cestode infection in humans. Infections are seen more often among children. It is most widespread in warm climates and around uns ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tapeworm
Eucestoda, commonly referred to as tapeworms, is the larger of the two subclasses of flatworms in the class Cestoda (the other subclass is 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. Examples are the pork tapeworm (''Taenia solium'') with a human definitive host, and pigs as the secondary host, and ''Moniezia expansa'', the definitive hosts of which are ruminants. Body structure Adult Eucestoda have a white-opaque dorso-ventrally flattened appearance, and are elongated, ranging in length from a few millimeters to 25 meters. Almost all members, except members of the orders Caryophyllidea and Spathebothriidea, are polyzoic with repeated sets of reproductive organs down the body length, and almost all members, except members of the order Dioecocestidae, are protandral hermaphrodites. Most except caryophyllideans consist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hymenolepiasis
Hymenolepiasis is infestation by one of two species of tapeworm: ''Hymenolepis nana'' or '' H. diminuta''. Alternative names are dwarf tapeworm infection and rat tapeworm infection. The disease is a type of helminthiasis which is classified as a neglected tropical disease. Symptoms and signs Hymenolepiasis does not always have symptoms, but they usually are described as abdominal pain, loss of appetite, itching around the anus, irritability, and diarrhea. However, in one study of 25 patients conducted in Peru, successful treatment of the infection made no significant difference to symptoms. Some authorities report that heavily infected cases are more likely to be symptomatic. Symptoms in humans are due to allergic responses or systematic toxaemia caused by waste products of the tapeworm. Light infections are usually symptomless, whereas infection with more than 2000 worms can cause enteritis, abdominal pain, diarrhea, loss of appetite, restlessness, irritability, restless sleep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
