Introduction of Taenia solium and Taenia saginata
Table of Contents
Taenia saginata is the beef tapeworm, a worldwide distribution in countries where cattle are raised and beef is eaten. Taenia solium is the pork tapeworm and it is not as widely distributed as T. saginata. It occurs mainly in Southern Africa, China, India and Central America. Both tapeworms live in the small intestine (upper jejunum) of man. These tapeworms use humans as its definitive host while pigs/beef as the intermediate or secondary hosts.
Differences between Taenia solium and Taenia saginata
The differences between Taenia solium and Taenia saginata are as follows-
| Characters | Taenia solium | Taenia saginata |
| Common name | Pork tapeworm | Beef tapeworm |
| Length | 2-3 meters | 5-10 meters |
| Proglottids (gravid segments) | 800-900 | 1000-2000 |
| Scolex (head) | with hooklets | without hooklets |
| Vagina | vaginal sphincter absent | vaginal sphincter present |
| Ovaries | 2 in number, with an accessory lobe | 2 in number, without any accessory lobe |
| Egg | Acid-fast embryophore of egg | Non-acid fast embryophore of egg |
| Intermediate host | Pig | beef |
Keynotes on Taenia solium and Taenia saginata
- The adult worms of T. saginata consist of the scolex (head), neck, and strobila which is made of a large number of proglottids (segments). It’s size up to 10 meters and life span of 10 years.
- Taenia solium life span is 25 years and its size 2-3 meters in length. Egg size of 30-40 µm and eggs are viable for up to 8 weeks.
- Cysticercus cellulosae (bladder worm) takes 5 to 12 weeks to becomes an adult worm.
- Taenia solium is the causative agent of neurocysticercosis and it is a parasitic infection caused by larval cysts. Larval cysts are enclosed sacs containing the immature stage of a parasite.
Few Related Photos
Egg of Taenia in stool examination
Adult Tapeworm
Egg of Taenia in Stool Examination
Dog Tapeworm
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