CLASSIFICATION OF TAENIA SAGINATA : BEEF TAPEWORM
PHYLUM :- PLATYHELMINTHES (Organ grade, acoelomate flatworms. )
SUB-CLASS :- EUCESTODA (Mesozoic tapeworms, larva with 6 hooks. )
ORDER :- CYCLOPHYLLIDEA (Scolex with four suckers. )
FAMILY :- TAENIIDAE (Uterus with lateral branches.)
GENUS :- Taenia
SPECIES :- saginata
The tapeworm is found endemic in the pork consuming areas. Its infection is abundant in India, China, Czechoslovakia, Yogoslavia and Germany. and very common in the beef consuming areas.
HABIT AND HABITAT
T. saginata is found in the posterior coils of the intestine.
GENERAL CHARACTERSTICS OF TAENIA SAGINATA : BEEF TAPEWORM
- Commonly called as Beef tape-worm.
- Preserved specimen is whitish in colour and is divided into scolex, neck and segments or strobila.
- Strobila is dorsoventrally flattened.
- Scolex contains 4 suckers.
- Rostellum and hooks are absent.
- Segments are about 1000 in number measuring about 4 to 6 meters.
- Segments are of 4 kinds-immature, mature, gravid and malformed.
- Life history includes man as definitive host and buffalo as intermediate host.
- Man acquires infection by eating raw and inadequately cooked beef mutton containing cysticercous larvae. Buffalo gets infection while grazing on contaminated grasses polluted by human faeces having eggs of T. saginata.
Infestation of Taenia saginata causes diarrhoea, dysentery, anaemia, secondary anaemia, eosinophilia, abdominal pain, intestinal pain, haemorrhage, appendicitis and destruction of mucous membrane.
Preventive measures : The infection of Taenia saginata can be avoided by not eating contaminated beef.
The specimen contains elongated gravid segments and all above features and hence it is Taenia saginata.