One is due to eating undercooked pork that contains the. Cysticercosis is an infection of both humans and pigs with the larval stages of the parasitic cestode, taenia solium. Taenia solium infection taeniasis is an intestinal infection with adult tapeworms that follows ingestion of contaminated pork. Taenia solium, the pork tapeworm, is endemic in most developing countries as well as in developed nations with a high influx of immigrants from endemic areas fig. Taenia solium completes its life cycle in two different vertebrate hosts, man and pig. These eggs are immediately infectious and do not require a developmental period outside the host.
Eggs are shed into the environment via human feces, and when ingested by pigs, they develop into tissue cysts, causing cysticercosis. Eggs are accidentally ingested from contaminated water or vegetables. Taenia solium taeniasiscysticercosis situation and trends. Infecciones por taenia the center for food security and public. Good hygiene and hand washing after using the toilet will prevent selfinfection in a person already. It is the leading cause of seizures and epilepsy and is considered a serious health problem worldwide. Taenia solium, the pork tapeworm of man, as adult lives in the intestine of man leading an endoparasitic life. Teniasis y cisticercosis world health organization. To address this knowledge gap we used wholecell patchclamp electrophysiology and calcium imaging in rodent hippocampal organotypic slice cultures to identify. This infection is caused by ingestion of eggs shed in the feces of a human tapeworm carrier.
Neurocysticercosis ncc is caused by the presence of taenia solium larvae in the brain and is the leading cause of adultacquired epilepsy worldwide. Taenia solium is the pork tapeworm, which causes human taeniasis and cysticercosis in humans, two different disease entities. Pdf a 48yearold man presented with a 2month history of abdominal discomfort and lethargy. The cestodes tapeworms taenia saginata beef tapeworm and t.
Taenia solium the common name for taenia solium is pork tapeworm i. It is acquired by humans through the ingestion of tapeworm larval cysts cysticerci in raw or undercooked pork. Taenia solium commonly known as the pork tapeworm or the armed tapeworm. Although many species exist, two species, taenia saginata and taenia solium, cause pathology in humans. Created using powtoon free sign up at youtube create animated videos and animated presentations for free. The usual intermediate hosts are domestic and wild pigs. Humans can also be infected with the larval stage after accidental. Vaccination of pigs has been investigated as a measure to control transmission of t. The enzyme immunotransfer blot assay is likely the antibody.
The life cycle of taenia solium involves the pig as the normal intermediate host harboring the larval vesicles, or cysticerci and humans as the definitive host harboring the adult tapeworm. Neurocysticercosis ncc in humans is caused by larvae of taenia solium. However, little is known about how seizures emerge in ncc. Vaccine development against the taenia solium parasite. Cysticercosis is caused by the larvae of the parasite taenia solium and can be acquired by. Las especies mas comunes son taenia solium y taenia saginata, pero existe otra. Taeniasis is the infection of humans with the adult tapeworm of taenia saginata or taenia solium. Adult tapeworms have also been found in some species of nonhuman primates.
Taeniasis is a tapeworm cestode infection acquired by the ingestion of raw or undercooked meat of infected animals. The larvae enter bloodstream and invade host tissues, where they further develop into. It is found throughout the world and is most common in countries where pork is eaten. Mobile larvae seen in the eye brain imaging eg cat scan, radiographs of muscle serology elisa 80% even in endemic areas. Taenia solium, the pig tapeworm, can induce two different types of infection in humans in different stages of its biological development cycle taeniasis is an intestinal infestation of adult tapeworms. It is worldwide in distribution the infection is common amongst those eating raw or insufficiently cooked measly pork. The restellum resembles the conventional figures of the sun, hence the name solium. It is also a component on neurocysticercosis presented by mramba nyindo and jovin kitau at kilimanjaro christian medical university college in moshi, tanzania. In this article we will discuss about taenia solium. Adult worms are rarely pathogenic but the encysted larval stage cysticercus cellulosae of the worm caused a serious disease in human called cysticercosis. Taenia solium armed tapeworm, measly tapeworm parasitology the pork tapeworm, contracted from undercooked or measly porkpork infected with larval forms of t solium, which can grow 0. The key difference between taenia solium and taenia saginata is that the pigs are the intermediate hosts of taenia solium, while the cattle are the intermediate hosts of taenia saginata tapeworms are parasitic segmented flatworms which are several meters long. Adult worms may cause mild gastrointestinal symptoms or passage of a motile segment in the stool. Welcome to this presentation on taeniasis due to taenia solium.
The taenia solium tapeworm is long, with a multisegmented ribbon shape similar to taenia saginata, but the scolex head of taenia solium is characterized by a ring of hooks which are used for attachment to the intestine. Taenia solium adulto cysticercus cellulosae larva insst. Infeccion por taenia solium tenia del cerdo y cisticercosis. Difference between taenia solium and taenia saginata.
Cysticercosis is usually asymptomatic unless larvae. Pdf on dec 20, 2015, angel a escobedo and others published taenia saginata y taenia solium find, read and cite all the research you need on researchgate. Heavy infection of taenia saginata can cause some of the following symptoms taeniasis caused by taenia saginata is more noticeable than taeniasis caused by taenia solium although t. Taenia solium is a zoonotic parasite that infects pigs and humans. Cestodes taenia solium north dakota department of health. Taenia solium humans and are usually the definitive host. In human ncc, the intensity of symptoms depends primarily on the inflammatory response, which is associated with the th1 response with high levels of tnf, ifn. Restate the basic concepts of parasitology define of the various terms related to basic parasitology discuss briefly the life cycle and pathogenesis of medically important parasites apply the knowledge of the life cycle to the principles of laboratory diagnosis learning outcomes. It is prevalent in many developing countries of south america, africa and asia, 15 causing a disease known as cysticercosis.
Taenia solium pork tapeworm infection and cysticercosis. Taenia solium definition of taenia solium by medical. Diagnostic tools for taenia solium leslie js harrison stakeholder meeting on taenia solium taeniasiscysticercosis diagnostic tools. There may be no symptoms or mild clinical problems, as with taenia saginata, including a. Taenia solium infection has been recognized since biblical times and the parasite life cycle has been identified by the 1850s. The cause of human cysticercosis is the egg form of taenia solium often abbreviated as t. It is a major public health problem because of the high proportion of seizure cases in endemic areas which are caused by nervous system infection with the larval stage neurocysticercosis, ncc garcia and del brutto, 2005. Taenia solium taeniasis is less frequently symptomatic than taenia saginata taeniasis. It is a flatribbon like tape worms that causes intestinal taeniasis. Taenia solium is the pork tapeworm, a tapeworm belonging to the cyclophyllid cestode family taeniidae. The eggs enter the intestine where they develop into larvae. Man is considered to be the definitive host and the pig is considered as the intermediate host. Teniasis por taenia solium, taenia saginata y taenia. Diagnostic tools for taenia solium and taenia saginata.
1129 1668 830 839 169 661 859 1302 833 1630 1061 772 1542 682 261 1507 124 1074 1455 52 858 412 446 1262 252 1267 767 710 509 1097 305