Taenia saginata synonym taeniarhynchus saginatus, commonly known as the beef tapeworm, is a zoonotic tapeworm belonging to the order cyclophyllidea and genus taenia. Infection with taenia solium adults is usually asymptomatic. Taenia solium tapeworm infections can lead to cysticercosis, which is a disease that can cause seizures, so it is important seek treatment. Note the four large suckers and rostellum containing two rows of hooks. The larvae of these organisms are called cysticerci singular. History taenia saginata taenia solium research edinburgh university research at eu, ctvm was initiated by uk gov. Humans are the only hosts for these taenia tapeworms. Human taeniasis and cysticercosis in asia the lancet.
Ppt taenia solium powerpoint presentation free to download id. The parasite is more commonly known as the pork tapeworm, because the infection is primarily caused by the consumption of cured or uncooked pork. Gravid proglottid from the cestode taenia saginata 5259 lores. Jan 12, 2020 taenia saginata is a topic covered in the johns hopkins abx guide to view the entire topic, please sign in or purchase a subscription official website of the johns hopkins antibiotic abx, hiv, diabetes, and psychiatry guides, powered by unbound medicine. 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. Difference between taenia solium and taenia saginata learn. Epidemiology of taenia saginata taeniosiscysticercosis. Diagnostic tools for taenia solium and taenia saginata. Proposals for the resurrection of hydatigera lamarck, 1816 and the creation of a new genus versteria. Taenia solium infection taeniasis is an intestinal infection with adult tapeworms that follows ingestion of contaminated pork. The length of the body varies between 2 and 4 meters. 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. Wed like to understand how you use our websites in order to improve them. One is due to eating undercooked pork that contains the cysts and results in adult worms in the intestines.
Okello a, ash a, keokhamphet c, hobbs e, khamlome b, dorny p, et al. One is due to eating undercooked pork that contains the. Taeniasis with t solium can lead to neurocysticercosis and threaten others by accidental ingestion of eggs released from asymptomatic taeniasis patients. Taenia saginata, the beef tapeworm, and taenia solium, the pork tapeworm, are the most common tapeworms affecting humans. Taenia solium 1 lecture ii class cestoda 2 common features of class cestoda. Asaava ll, kitala pm, gathura pb, nanyingi mo, muchemi g, schelling e. Correct identification is important because the consequences of human infection by these two parasites are very different. Human taeniasis due to taenia saginata and taenia solium is a zoonotic.
People with taeniasis may not know they have a tapeworm infection because symptoms are. Taenia solium is a hemaphroditic cestode tapeworm affecting both humans and pigs. Except the adult, various stages of its life history are passed in the body of secondary host. Taeniasis and cysticercosis due to taenia solium in japan. Occasionally, appendicitis or cholangitis can result from migrating proglottids. The body of taenia solium is dorsoventrally compressed, ribbon like and elongated. Two practical methods for the differentiation of cestode proglottids, i routine embedding, sectioning, and hematoxylineosin he staining and ii. In vitro model of postoncosphere development, and in vivo.
Read this article to learn learn about the structure and life cycle of taenia. Taenia solium is known to cause human cysticercosis while t. Horrific massacre at thailand mall kills at least 20. Humans pass the tapeworm segments andor eggs in feces and contaminate the soil in areas where sanitation is poor.
The armed scolex may cause some inflammation of the intestinal wall, and rarely may penetrate the intestine, causing peritonitis. The parasite is traditionally found in developing countries where undercooked pork is consumed under poor sanitary conditions andor as part of traditional food cultures. Diagnostic tools for taenia solium leslie js harrison stakeholder meeting on taenia solium taeniasiscysticercosis diagnostic tools, who, geneva, december 2015. A size selected genomic dna library was constructed using dna extracted from taenia saginata. Taenia solium pork tapeworm infection and cysticercosis.
Human taeniasis is a parasitic infection caused by three tapeworm species, t. Difference between taenia solium and taenia saginata. Differential diagnosis between taenia saginata and taenia solium. Differential diagnosis of taenia saginata and taenia. T aeniid tapeworm infections in the human intestine are caused by taenia solium, t. The beef tapeworm, taenia saginata, causing cysticercosis in bovines and taeniosis in humans, is. Taenia solium has been ranked the most important foodborne parasitic hazard globally and within endemic. It is found throughout the world and is most common in countries where pork is eaten. Differential diagnosis of taenia saginata and taenia solium. Mapping occurrence of taenia solium taeniosiscysticercosis. Taenia saginata, known as the beef tapeworm, is transmitted to humans in the form of. The body is elongated, dorsoventrally flattened and ribbonlike.
Taenia saginata was differentiated from taenia solium infection by the late 1700s. Pdf differential diagnosis between taenia saginata and taenia. Pdf taenia saginata was considered to be absent in ecuador. Epidemiology of taenia saginata taeniosiscysticercosis ugent biblio. Coinfection with enterobius vermicularis and taenia saginata. Taenia saginata, cestoda, beef tapeworm, taeniosis, bovine cysticercosis, north and.
The distribution of taenia saginata in the americas is unclear. Global distribution of taenia solium taeniosiscysticercosis. Taenia solium the common name for taenia solium is pork tapeworm i. Taenia solium is the pork tapeworm, a tapeworm belonging to the cyclophyllid cestode family taeniidae. However, the recent increase in international tourism and immigration is spreading the disease into nonendemic developed countries. Man is the primary or definitive host, the secondary host for t. Head is provided with a rostellum, with a double row of large and small teeths. Taenia saginata has 1230 primary lateral uterine branches, while t. Taenia solium, taenia saginata, taenia asiatica, their. Africa, middleeast, central and south america, europe and asia t.
Humans were previously thought to have acquired taenia species t. Taenia solium, taenia saginata, taenia asiatica, their hybrids and other helminthic. Taeniasis is the infection of humans with the adult tapeworm of taenia saginata or taenia solium. Human enterobiasis caused by enterobius vermicularis e.
The body is either grayish or yellowish or creamy white in colour. At one time, the larvae and adult tapeworms were thought to be different species. The main feature of this infection is the passage of proglottids in the stool. Infection with the larval form of taenia solium, t. The most striking feature consists of the passage active and passive of proglottids. Context human taeniasis caused by the pork, taenia solium, or beef, t saginata, tapeworm arises after eating pork or beef contaminated with metacestodes, the larval stage of these parasites. Epidemiology of taenia saginata taeniosiscysticercosis parasites.
It is an intestinal parasite in humans causing taeniasis a type of helminthiasis and cysticercosis in cattle. Infections with these cestodes are therefore a serious public health problem in areas of endemicity. The objective of this work was the rapid and easy differential diagnosis of taenia saginata and t. Cysticercosis is usually asymptomatic unless larvae. Cestodes taenia saginata north dakota department of health. Members of the genus are responsible for taeniasis and cysticercosis in humans, which are a type of helminthiasis belonging to the group of neglected tropical diseases. The cestodes tapeworms taenia saginata beef tapeworm and t.
Taeniasis is the parasitic infection of humans caused by adult tapeworm species. Visualization of the branches can be improved by clearing the specimen in lactophenol followed by india ink injection into the lateral genital pore. Prevalence and associated risk factors of taenia solium. Comparative in vitro and in vivo studies on the oncosphere and the postoncospheral po forms of t.
Pdf taenia solium and taenia saginata researchgate. Adult worms may cause mild gastrointestinal symptoms or passage of a motile segment in the stool. The aim of this study was to use in vitro culture assays and in vivo models to study the differences in the. The adobe flash plugin is needed to view this content. Taenia saginata, known as the beef tapeworm, is transmitted to humans in the form of infectious larval cysts found in the meat of cattle, which serve as the parasites usual intermediate host.
Differentiating taenia solium andtaenia saginata infections. Taenia is a genus of tapeworms a type of helminth that includes some important parasites of livestock. Mature proglottid has 1230 lateral uterine branches, can be differentiated from taenia solium 7 quadrate four suckers, unarmed. The dna was digested using the restriction enzyme ecor 1 under star conditions and the 24 kbase fraction, selected following sucrose densitygradient separation, was cloned in the bacteriophage. Taeniasis refers to infection with the tapeworm form of one of three taenia species. Taenia solium taeniasis is less frequently symptomatic than. Taenia solium and taenia saginata linkedin slideshare. In eastern and southern africa, cattle production plays a crucial role in the economy, but a clear overview of the prevalence of t. Taenia infestations dr menal wali final yr md pgt tropical medicine 2. Conversely, most patients infected with taenia saginata notice passage of proglottids, which are motile, more numerous, and larger than those of t solium. Humans can also be infected with the larval stage after accidental. Infection follows consumption of undercooked beef or pork containing cysts. Adult worm is flattened ribbonlike, without body cavity.
The restellum resembles the conventional figures of the sun, hence the name solium. Humans are the only definitive hosts for these three species. Taenia saginata taeniasis produces only mild abdominal symptoms. Author summary the zoonotic tapeworm, taenia solium, affects millions of impoverished people worldwide and can cause neurocysticercosis ncc, an infection of the central nervous system which is potentially fatal. The structure and life cycle of taenia with diagram. Pdf on dec 9, 2018, mohammed thabit salih and others published taenia solium and taenia saginata find, read and cite all the research you need on researchgate. Cattle are the intermediate hosts, where larval development occurs, while humans are definitive hosts harbouring the. Dikatakan berbahaya karena kemungkinan terjadinya infeksi sendiri oleh cysticercus dapat terjadi.
Taenia solium infection and the resulting disease neurocysticercosis are endemic in less developed countries where pigs are raised as a food source. The oligonucleotides contain sequences established for two previously reported, noncoding dna fragments cloned from a genomic library of t. The beef tapeworm, taenia saginata, causing cysticercosis in bovines and taeniosis in humans, is thought to have a global distribution. Taenia saginata andtaenia solium are the two taeniids of greatest economic and medical importance, causing bovine and porcine cysticercosis and taeniasis in humans. This disease usually causes only mild abdominal symptoms. Hypothetically, children may be a vulnerable population to infection as neurological problems and cognitive impairment caused by ncc during formative school years may lead to poor. Taenia saginata, called the beef tapeworm, is a common intestinal infection worldwide. We have designed speciesspecific oligonucleotides which permit the differential detection of two species of cestodes, taenia saginata and taenia solium. Taenia saginata beef tapeworm, taenia solium pork tapeworm or taenia asiatica asian tapeworm. Bhalla d, kapoor s, kapoor a, lotfalinezhad e, amini f, bhatta nk, et al. Cestodes taenia solium north dakota department of health. Although it is very morphologically similar to the t.
The zoonotic parasite taenia saginata utilizes bovines as an. Tim odempsey, in antibiotic and chemotherapy ninth edition, 2010. Eggs are shed into the environment via human feces, and when ingested by pigs, they develop into tissue cysts, causing cysticercosis. Mar 15, 2019 the zoonotic parasite taenia saginata utilizes bovines as an intermediate host causing cysticercosis and humans as the definitive host causing taeniosis. Differentiating taenia solium and taenia saginata infections.
Helminths parasitic worms multicellular, bl symmetrical, elongated, flat or round animals 3. Apr 15, 2020 taenia solium, taenia saginata, taenia asiatica, their hybrids and other helminthic infections occurring in a neglected tropical diseases highly. The larval stages of the tapewormsm taenia solium and taenia saginata, can produce cysticercosis in humans. Taenia solium the pig tapeworm and taenia saginata the cattle tapeworm. Taenia solium taeniasis is less frequently symptomatic than taenia saginata taeniasis.
Taenia solium is a zoonotic cestode that causes taeniasis and cysticercosis in humans. Taenia solium and taenia asiatica are acquired from ingestion of undercooked pork. The attachment organ, or scolex, has 4 large suckers wi. Taenia solium, taenia saginata, taenia asiatica, their hybrids and other helminthic infections occurring in a neglected tropical diseases highly. A teniase e uma alteracao provocada pela presenca da forma adulta da taenia solium ou da taenia saginata no intestino delgado do hospedeiro definitivo, os humanos. They are morphologically characterized by a ribbonlike body composed of a series of. Rflp, 12s rdna fragment amplifie with t60f and t375r primers and restricted by ddei enzyme. Pdf taenia solium, taenia saginata, taenia asiatica, their hybrids. Speciesspecific identification of human tapeworm infections is important for public health purposes, because prompt identification of taenia solium carriers may prevent further human cysticercosis infections a major cause of acquired epilepsy. Taeniasis in humans is a parasitic infection caused by the tapeworm species taenia saginata beef tapeworm, taenia solium pork tapeworm, and taenia asiatica asian tapeworm. Taeniasis is the infection of humans with the adult tapeworm of taenia saginata, t. Taenia solium, the pork tapeworm of man, as adult lives in the intestine of man leading an endoparasitic life.
Due to its tape like appearance, it is called tapeworm. The areas with the highest prevalence up to 27% are in. Proglottid is smaller than t saginata and has 7 lateral branches off the central uterus. Humans can become infected with these tapeworms by eating raw or undercooked beef t. The most important health problem is infection by the cysticerci, cysticercosis. It is worldwide in distribution the infection is common amongst those eating raw or insufficiently cooked measly pork. A panel of cestode dnas including taenia saginata, taenia solium, taenia taeniaeformis. Note the four large suckers and lack of rostellum and rostellar hooks. Classe cestoda taenia solium e taenia saginata title. Taenia solium is the pork tapeworm, a tapeworm belonging to the cyclophyllid cestode family. Pdf taeniasis, caused by infection with taenia saginata or taenia solium, occurs on bali due to the consumption of undercooked beef and. Taenia solium eggs can also cause cysticercosis life cycle.
195 132 153 171 1391 286 551 71 1560 274 364 567 161 677 205 841 862 1142 694 825 648 408 577 886 189 536 968 535 1029 618 1163 968 990 1113 113 110 1106 1110