PowerPoint about laboratory diagnosis of Taenia species (T.saginata and T. solium ) .Contain information about diagnosis with picture to simplify understanding .

1. Huda Alislam Talab

2. Intestinal Taeniasis
Stool examination
 Demonstration of characteristic eggs and less often
proglottids of Taenia
 Multiple stool examination and concentration
techniques (formol ether sedimentation)
 Anal swabs

3.  Eggs of T. saginata and T. solium are morphologically
similar except that eggs of T. saginata are acid fast.
 Egg consists of an oncosphere with six hooklets
surrounded by an embryophore
 Proglottids of T. saginata and T. solium can be
differentiated by lateral branches in uterus and
expulsion of segments (singly or in chain)
 Scolex can be detected in feces very rarely. T. solium
scolex is armed with rostellum and hooklets.

4. Morphology of the parasite

7. T.saginata cysticercus
( bovis)
T.solium cysticercus
( cellulosae)
 measure 5-10x3-5mm
 Consist of a fluid filled sac
or bladder containing a
small invaginated scolex
which has suckers but no
hooks.
 measure 5-18x5mm
 Consist of a fluid filled sac
or bladder containing a
small invaginated scolex
which has a ring of hooks
and suckers.

14. T.saginata T. solium

15. Morphology of the parasite
Scolex of T.solium Scolex of T.saginata

16. Gravid segment of T.saginata
 White and opaque . 20x6mm.
 The segments are passed singly.
 Longer than T.solium gravid
segment.
 Uterus has more than13 main
side branches on each side.

17. Gravid segment of T.solium
 Grey-blue and translucent .
 13x8mm.
 The segments passed in chains.
 Shorter than a gravid segment of
T.saginata.
 Uterus has up to 13 main side
branches on each side

18. Taenia saginata adult

19. T.solium 2-3meters contain
800-1000 segments
T.saginata 4-10meters
contain up to 2000segments

20. Egg of T.saginata or T.solium
 Round or round to oval
 33-43 m in diameter
 A thick, brown, radially
striated wall (embryophore)
surround the embryo.
 Hooklets are present

22. T.saginata T.solium

23. Cysticercosis
Radiodiagnosis (imaging methods)
 CT scan and MRI are the two important imaging
methods used to detect cysticerci in brain
Are useful to identify:
The number of cyst, location, size, stage of disease
active or dormant lesion

24. Cystic lesion of neurocysticercosis

25. Histopathology
Cysticerci can be detected in muscles, eyes, subcutaneous
tissues (or brain during postmortem) by biopsy following
surgical removal or fine needle aspiration of the cyst