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Taenia taeniaeformis
Scientific classification e
Kingdom: Animalia
Phylum: Platyhelminthes
Class: Cestoda
Order: Cyclophyllidea
Family: Taeniidae
Genus: Taenia
Species: T. taeniaeformis
Binomial name
Taenia taeniaeformis
Batsch, 1786
Synonyms

Hydatigera taeniaeformis (Batsch, 1786)

A pair of tapeworm proglottids.

Taenia taeniaeformis is a parasitic tapeworm, with cats as the primary definitive hosts. Sometime dogs can also be the definitive host. The intermediate hosts of this tapeworm are primarily rodents and less frequently lagomorphs (rabbits) which the cat must kill and ingest their liver in order to acquire the tapeworm infection.[1] The worm tends to be white, thick bodied, and around 15 to 60 cm in length.[2] This species of tape worm is much less frequently encountered than Dipylidium caninum, which has fleas as its intermediate host rather than rodents but exhibits most of the same physical characteristics and is treated with the same medications (i.e., antihelminthics).

Life cycle[edit]

The definitive host must ingest the strobilocercus stage of the tapeworm in order to acquire the parasite. The strobilocercus is a larval stage that has a terminal bladder and a rather long segmented body that is in crowned with the scolex that looks very similar to that found on the adult form. It seems that the strobilocercus must attain an age of about 2 months before it is in infective to a cat upon ingestion.[2] Once a cat ingests the strobilocercus, the posterior portion of the larva is in digested away and then the anterior portion begins to develop. Infection in the cat will develop and become obvious between 30 and 80 days after the cat has ingested the infected liver of a prey animal. Once the infection is established, it can last for between seven months and three years. A cat will produce between three and four motile segments per day either excreted in the feces or through direct migration, each containing between 500 and 12,000 eggs. Spontaneous worm destrobilization (the shedding of the entire portion of the body located behind the scolex and containing all of the strobila) may occur without any change in actual infection. Once shed, the proglotids are often very active and are capable of crawling considerable distances as they shed their eggs. Actual eggs are spheroid and are between 31 and 36 micrometers in diameter.[3] Superinfection in cats is possible if they are fed young tapeworms in the presence of established mature ones.[3]

Diagnosis[edit]

Infection in cats is in diagnosed by finding the distinctive segments in the feces or by finding the eggs upon fecal flotation. You may also see small segments lying around where the animal has been that have exited through the anus. To identify a segment, it can be crushed on a glass slide and examined for eggs.[2]

Treatment[edit]

Praziquantel (5 mg/kg body weight) and epsiprantel have both been shown to be efficacious in the treatment of taeniataeniaeformis in cats. Similarly, febantel and fenbendazole are approved for the treatment of this parasite in most of the world. Mebendazole and nitroscanate are also products that have efficacy against taeniataeniaeformis in cats.[2]

References[edit]

  1. ^ Little, S. (2011). The Cat: Clinical Medicine and Management. Elsevier Health Sciences. ISBN 9781437706611. 
  2. ^ a b c d "Taenia taeniaeformis". American Association of Veterinary Parasitologists. Retrieved 30 April 2015. 
  3. ^ a b Bowman, D. D.; Hendrix, C. M.; Lindsay, D. S.; Barr S. C. (2008). Feline Clinical Parasitology. John Wiley & Sons. p. 223. ISBN 9780470376591. 

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Taenia_taeniaeformis — Please support Wikipedia.
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