Taenia saginata and Taenia solium are tapeworms with similar adult morphologies consisting of a scolex, neck, and strobila, but some differences. T. saginata measures 5-10 meters long, has a scolex with 4 suckers but no hooklets, and eggs that are 31-43 micrometers containing an oncosphere with 3 pairs of hooklets. T. solium measures 2-3 meters long, has a globular scolex with 4 suckers and a rostellum with a double row of hooklets, and a short 5-10 mm neck. Both have ribbon-like proglottid segments containing eggs in their life cycles.

1. Morphology and life cycle of
Taenia
Dr.chinj.k

2. Taenia Saginata
Adult Morphology:
It measures 5 to 10 metres in length
It consists of three parts : scolex , neck , strobila

3. Scolex:
It has 4 circular suckers and doesn’t contain any hooklets

4. Neck:
It is long and narrow
Strobila:
It is composed of series of ribbon like segments called proglottids
The segments are made up of mature and gravid proglottids
Proglottids are 1000 to 2000 in number

6. Eggs:
Spherical
31 to 43 micrometers in diameter
The inner embryophore is thick walled , and brown in colour
It contains an oncosphere containing 3 pairs of hooklets

8. Life cycle

9. Taenia Solium
Adult Morphology:
>It measures 2 to 3 metres in length
>It also consists of three parts: scolex , neck and strobila

10. Scolex:
It is globular in shape and has 4 circular suckers
The head contains a rostellum armed with a double row of
hooklets

12. >Neck it is short and measures 5 to 10 mm in length
>Proglottids are 800 to 900 in number
Egg:
>Characteristic features are the same as those described in
taenia saginata

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