Parasitology (introduction to medical para and trematodes and cestodes)

1. Parasitology practical 1
(Trematodes & Cestodes)
By : Osama Al-Zahrani
@OSAMA_Z96

2. EggsVentral suckerOral sucker
Name :
Fasciola.
Most important feature :
- Ventral sucker.
- Oral sucker.
- Cone-shaped anterior end.
- Branched ovary lies anterior to the testes.
- A dark-staining uterus is in the anterior third of
the worm.
- The genital pore located near the ventral
sucker.
- 3 cm long.

3. Ovoid in shape
operculum
Name :
Egg of Fasciola.
Most important feature :
- Ovoid in shape.
- Operculum.
- Ova measure :
130 - 150μm × 63 - 90μm.

4. Oral sucker
Ventral sucker
Name :
Schistosoma.
Most important feature :
- 3-5 big testes.
- The cuticle of the male is covered with
tubercles.
- Narrow anterior and broad posterior.
- Oral sucker and ventral sucker.
- Measure up to 15×1mm in length.

5. Name :
Schistosoma.
Most important feature :
- Cyliderical smooth.
- Narrow and long Ovary.
- Union of two intestinal.
- Rudimentary oral sucker and venteral
sucker.
- Measure up to 20 × 0.2 mm.

6. Oral sucker
Ventral sucker
Name :
Copula of Schistosoma.
Most important feature :
- Female worm resides in the
gynecophoral groove of the male.
- Narrow shape.
- Ideal for living in veins.
- The length approximately 8 mm.

7. Suckers
Name :
Scolex of Taenia saginata.
Most important feature :
- Four suckers.
- No rostellum.

8. Uterus
Segment
Ovary
Testis
unilateral
genital pore
Name :
Mature segment of taenia.
Most important feature :
- Squarish.
- Male and female genital organs.
- Unilateral genital pore.
- Blinde vertical uterus in position.
- Bilobed ovary lies in the posterior
part of the segment.

9. Eggs
Corona radiate
( Shell )
Oncosphere
Name :
Egg of Taenia species
Most important feature :
- Spherical.
- Yellowish brown.
- Thick and radially striated shell.
- The oncosphere has 3 pairs of
hooklets.
- Measure 30 - 40μm in diameter.