Taenia saginata definition of taenia saginata by medical. Pdf differential diagnosis of taenia saginata and taenia. The beef tapeworm is found all over the world, including the united states, and is often found in many countries to have greater prevalence than that of t. Taenia saginata beef tapeworm, taenia solium pork tapeworm. Taeniasis is the infection of humans with the adult tapeworm of taenia saginata or taenia solium. Taenia saginata soliumis suspected, in endemic areas, by the crawling movements of gravid segments in the perianal area. It is an intestinal parasite in humans causing taeniasis a type of helminthiasis and cysticercosis in cattle. Taenia saginata was differentiated from taenia solium infection by the late 1700s.
Cattle are the intermediate hosts, where larval development occurs, while humans are definitive hosts harbouring the. It is worldwide in distribution the infection is common amongst those eating raw or insufficiently cooked measly pork. Eating cysticerci larval form in raw or undercooked beef. Difference between taenia solium and taenia saginata december 21, 2015 acharya tankeshwar difference between, lab diagnosis of parasitic disease, microbiology for beginners, parasitology 5 taeniasis is the parasitic infection of humans caused by adult tapeworm species. The structure and life cycle of taenia with diagram.
T aeniid tapeworm infections in the human intestine are caused by taenia solium, t. Differentiating taenia solium and taenia saginata infections. Among them 359 were caused by taenia saginata, three by t. It is found throughout the world and is most common in countries where pork is eaten. It is also called tapeworm as the shape of the body is like a tape. Human taeniasis is a zoonotic condition resulting from infection with the adult stages of taenia saginata beef tapeworm, taenia solium. Taenia solium, taenia saginata, taenia asiatica, their. Infection with the larval form of taenia solium, t. Taenia solium taeniasis is less frequently symptomatic than. They are morphologically indistinguishable form the eggs of taenia saginata but, unlike the eggs of t. Cysticercosis is usually asymptomatic unless larvae. Difference between taenia solium and taenia saginata. Pdf epidemiology of taenia saginata taeniosiscysticercosis.
The restellum resembles the conventional figures of the sun, hence the name solium. Human taeniasiscysticercosis annals of gastroenterology. Humans are the only definitive hosts for these three species. Taenia saginata, taenia saginata asiatica and taenia solium are unique among helminth agents of zoonoses because their life cycles are dependent upon humans as the only definitive host. Pdf background the beef tapeworm, taenia saginata, causing cysticercosis in bovines and taeniosis in. At one time, the larvae and adult tapeworms were thought to be different species. Johann goeze is credited with the first correct description of taenia latin, flat band or ribbon saginata latin, fed, commonly known as the beef tapeworm, in 1782. Taenia solium the common name for taenia solium is pork tapeworm i. Taenia solium, for instance, is an ntd ranked first on the global scale of. Global distribution of taenia solium taeniosiscysticercosis. Tim odempsey, in antibiotic and chemotherapy ninth edition, 2010.
Taenia saginata beef tapeworm infection infectious. General recognition features can be 10 meters long though usually 25 meters 2000 proglottids 1 cm long with 12 being gravid proglottids have 1520 lateral branches from the uterus and a lateral genital pore scolex has 4 suckers with a slight apical depression and no hooklets. Infection with an adult tapeworm is known as taeniasis and occurs only in humans, the sole definitive host footnote 1, footnote 4. One is due to eating undercooked pork that contains the. Differential diagnosis of taenia saginata and taenia solium infection by pcr article pdf available in journal of clinical microbiology 382. Cestodes taenia solium north dakota department of health. The larvae mature in about 2 mo to adult worms that can live. Occasionally, appendicitis or cholangitis can result from migrating proglottids. Taenia solium is the pork tapeworm, a tapeworm belonging to the cyclophyllid cestode family taeniidae. Their life cycles also depend on the link between humans and cattle t.
Taenia saginata synonym taeniarhynchus saginatus, commonly known as the beef tapeworm, is a zoonotic tapeworm belonging to the order cyclophyllidea and genus taenia. Epidemiology of taenia saginata taeniosiscysticercosis. 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. Keywords taeniasiscysticercosis, taenia solium, taenia saginata, neurocysticercosis.
Humans can also be infected with the larval stage after accidental. The cestodes tapeworms taenia saginata beef tapeworm and t. The body is elongated, dorsoventrally flattened and ribbonlike. One is due to eating undercooked pork that contains the cysts and results in adult worms in the intestines. In this article we will discuss about taenia solium. The most striking feature consists of the passage active and passive of proglottids. Dec 22, 2016 teniasis por taenia solium, taenia saginata y taenia asiatica taenia saginatataenia solium taenia asiatica 3. Pig cow acts as intermediate host and harbour the larval stage. Difference between taenia solium and taenia saginata learn.
Two practical methods for the differentiation of cestode proglottids, i routine embedding, sectioning, and hematoxylineosin he staining and ii pcr with restriction enzyme analysis pcrrea, were tested on samples from 40 individuals infected with t. General recognition features can be 10 meters long though usually 25 meters 2000 proglottids 1 cm long with 12 being gravid proglottids have 1520 lateral branches from. Infection follows consumption of undercooked beef or pork containing cysts. Adult worms may cause mild gastrointestinal symptoms or passage of a motile segment in the stool. Proglottids may also be cleared overnight in glycerol or stained with carmine or hematoxylin using published procedures if recovered, the scolex of t.
Medicina veterinaria y zootecnia, universidad central del ecuador, quito, ecuador. Taenia solium pork tapeworm infection and cysticercosis. Taenia solium eggs can also cause cysticercosis life cycle. Taenia solium, the pork tapeworm of man, as adult lives in the intestine of man leading an endoparasitic life. Taeniasis is the infection of humans with the adult tapeworm of taenia saginata, t. The distribution of taenia saginata in the americas is unclear. This study aimed to map the occurrence of taenia solium taeniosiscysticercosis at national level within central america and the caribbean basin, and to map the distribution of porcine cysticercosis at firstlevel administrative subdivision level department level and the porcine population at risk. Taenia saginata, the beef tapeworm, and taenia solium, the pork tapeworm, are the most common tapeworms affecting humans. Read this article to learn learn about the structure and life cycle of taenia. Taenia saginata taeniasis produces only mild abdominal symptoms. Y, chenard mp, mathieu b, grimm f, deplazes p, pfaff aw.
Now the beef tapeworm has two hosts that it infects in a lifetime. Taenia saginata is a parasite so its habitat and nutrition comes from another organism. Beef tapeworm tapeworm infections have been reported since 1500 b. 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.
Infection with the beef tapeworm, taenia saginata, may cause mild gi upset or passage of a motile segment in the stool. Pronunciation of taenia saginata with 1 audio pronunciation, 1 meaning, 2 translations and more for taenia saginata. Proglottid is smaller than t saginata and has 7 lateral branches off the central uterus. Taenia infections the center for food security and public health. 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. Taenia solium and taenia saginata linkedin slideshare. Humans can become infected with these tapeworms by eating raw or undercooked beef t. Eggs are shed into the environment via human feces, and when ingested by pigs, they develop into tissue cysts, causing cysticercosis. The adult worm spends most of its time in the humans small intestine. Taenia solium infection taeniasis is an intestinal infection with adult tapeworms that follows ingestion of contaminated pork. Taenia solium taeniasis is less frequently symptomatic than taenia saginata taeniasis. Taenia solium and taenia saginata, and is con sidered as a.
Taeniasis is the parasitic infection of humans caused by adult tapeworm species. Teniasis por taenia solium, taenia saginata y taenia. Teniasis por taenia solium, taenia saginata y taenia asiatica. Epidemiology of taenia saginata taeniosiscysticercosis parasites. Humans act as the definitive host and harbour the adult tapeworm in the small intestine. Taenia saginata beef tapeworm and taenia solium pork tapeworm are intestinal cestodes both t. The larvae of these organisms are called cysticerci singular. People with taeniasis may not know they have a tapeworm infection because symptoms are. This zoonotic parasite is believed to be widely endemic across most of latin america. Taenia saginata beef tapeworm, taenia solium pork tapeworm or taenia asiatica asian tapeworm. Historically, taenia tapeworms were believed to have infected humans no more than 10,000 years ago, around the time of domestication of cows and pigs. Cestodes taenia saginata north dakota department of health.
734 1267 986 1122 560 358 1349 175 316 1197 638 341 795 197 1176 1265 361 1389 475 981 448 422 787 1222 103 1440 363 1498 364 1118 629 1071