Cestoda Lab 9 Taenia saginata beef tape worm

Cestoda Lab 9 Taenia saginata (beef tape worm). Taenia solium (pork tape worm).

Taenia spp. T. solium T. Saginata 5 – 10 meter T. Solium 2 – 4 meter

Taenia saginata: A-Gross specimen: • Note entire strobila, • Consisting of scolex (with 4 suckers & neck), • Immature segments, • Mature segments, • Gravid segments.

Taenia saginata: B- Scolex (with 4 suckers & neck).

Taenia ssp: C-Mature segments: Lateral genital atrium, Uterus central club like structure. Ovary bilobed, Vitelline gland single, Testes many scattered on lateral aspect Vas efferentia uniting into a single vas deferens; Excretory ducts 2 lateral and 1 transverse.

Carmine stain Taenia SPP. Mature Segment ( 12 mm)

Taenia saginata D-gravid segment: v Segment longer than wide v Sex organs other than uterus atrophied v Uterus with more than 12 branches; filled with eggs occupying entire segment.

Carmine stain Ink stain Taenia saginata Gravid Segment, with 13 – 30 lateral uterine branches ( 2 cm. L. X 0. 5 cm B )

Taenia ssp: E. Ova: ü Spherical, ü Medium sized, ü Containing hexocanth embryo (embryo with six hooks).

With Iodine Taenia spp Egg.

T. solium: A. scolex, with: rostellum, hooks, 4 sucker and neck.

suckers Taenia saginata Scolex is large Quadrate with 4 suckers but without rostellum and hooks ( 1 – 2 mm ) Taenia solium Scolex is small globular with 4 sucker and rostellum with hooks ( 1 mm ) Scolices of Taenia spp.

T. solium B. Gravid segment: Uterus with less than 12 branches

T. solium C. Cysticercus cellulosae: Ø Bladder-like structure; Ø Scolex inverted, with 4 suckers and hooks.

5 X 10 mm Section in human muscles (in eye, brain, liver, lung, kidney……) Taenia solium Cysticercus cellulosae