Schistosoma haematobium practical session 2nd grade students

2. Schistosoma (blood fluke)
life cycle

3. Shistosoma adult
Separate Sex
Oral and ventral sucker are little distance apart
Mouth, esophageus ,2 intestinal caeca
They reunion to form single caecum
Male is flattened , folded itself to form Gynaecophoric canal
Testes lies behind ventral sucker
Ovary : is ovoid ,lies infront of the union of caeca
Oviduct proceeds anteriorly it dilates to join ootype
Uterus : proceeds from ootype to open by vagina in the
Genital pore
Vitelline glands : are on either sides of the single caecum
Vitelline duct open in the ootype

4. schistosoma male
S. Haematobium
Larger 10×1 mm
Cuticle covered with fine tubercles
Union of caeca in the posterior half ( 2/3 + 1/3 )
Testes are 3-5 (4), large , globular and arranged in line .
S.Mansoni
Smaller 8×1 mm
Cuticle covered with coarse tubercles
Union of caeca in the anterior half ( 1/3 + 2/3 )
Testes are 6-9 (8),small,oval and overlapping in cluster .

5. Schistosoma haematobium adult male
Size: 10×1 mm
Cuticle covered with fine tubercles
Union of caeca:
in the posterior half ( 2/3 + 1/3 )
Testes:
are 3-5 (4), large , globular and
arranged in line .

6. Shistosoma female
S.Haematobium
Long and slender (20×0.25 mm ) ,cyliderical
Union of caeca in the posterior half like male
Ovary : oval,infront of the intestinal union (posteriorly )
Uterus : long,straight,containing 20 to 30 ova
Vitelline glands : small , extend along the single caecum
S. Mansoni
Smaller (14×0.15 mm)
Union of caeca in the anterior half like male
Ovary : in front of the intestinal caeca union (anteriorly)
Uterus : short ,contain 1 to 4 ova
Vitelline gland : larger

8. Male and female in copula
Slender female lies in the gynecological
Canal of the folded male
Species can be determined by number
Of testes in male and position of ovary
In female

10. Schistosoma egg
Size : 150× 65 µ ( S. mansoni ) & 140×60 µ (S. haematobium )
Shape: oval
Shell : thin
Colour : translucent , colourless
Content : mature miracidium
Ch.ch :
s.haematobium
s.Mansoni

11. Schistosoma haematobium egg
Size : 140×60 µ
Shape: oval
Shell : thin
Colour : translucent , colourless
Content : mature miracidium
Ch.ch : terminal spine

12. Shistosoma cercaria
(furcocercous cercaria)
Formed of body and tail
Body : 2 suckers, primitive gut ,
5-6 pairs of penetration glans
Tail : forked

14. Bulinus trancatus snail
- Left-sided snail
- Short spire.
- With shoulders and umbilicus.
- Deep sutures.
- Blunt apex and wide apex angle.

15. Good luck