Taenia species.pptx for MBBS and BDS students

Class PowerPoints of Taenia species for medical and paramedic students

1. Taenia species Dr. Subhash Lal Karn Associate Professor Dept. of Microbiology, NGMC

2. Taenia Egg We can’t use egg to differentiate b/w two spieces

3. 2.   Egg , The eggs of Taenia saginata and T. solium are indistinguishable morphologically. The eggs are spherical, diameter 31 to 43 µ m, with a thick radially striated brown embryophore . Inside each is an oncosphere with 6 hooklets . t

4. scolex

5. Taenia scolex Taenia saginata Taenia solium

6. Taenia Adult worm Taenia solium Taenia saginata

7. Comparison Raed Z. Ahmed, Medical Parasitology Lab.,2012 Aspect Taenia saginata Taenia solium Intermediate host Cows (Beef tape worm) Pigs (Pork tape worm) Adult size Longer ( 4 – 8 meters ) Smaller ( 2 - 4 meters ) Number of segment 1000 – 2000 700 - 1000 Mature segment 2 lobes ovary 3 lobes ovary Gravid proglotid With 15 – 30 uterine branches With 7 – 13 uterine branches Scolex Devoid rostellum and hooks With rostellum and 2 rows of hooks Larvae Cysticercus bovis in cattle only Cysticercus cellulosae in pig as well as in man Disease caused in man Taeniasis Taeniasis and cysticercosis

8. The subcutaneous nodules are usually found in head, limbs, neck, abdomen and back. They are movable and painless. (1) Subcutaneous type: Note this cysticercus in the tongue

9. The cysticercus is usually found in the vitreous body or sub-retina. Visual disturbance often occurs. The died body of worm may provokes local inflammation causing blindness . (2) Ocular type:

10. (3) Brain type : The symptoms are related to the site of infection. The patients may manifest headache, nausea, vomiting, epilepsy , paralysis , weakness in limbs, mental disorder. Epilepsy is the most frequent symptoms of brain cysticercosis .

11. Brain type