1. By Dr Maria John
Post graduate
Microbiology

2. Adult worm
•Females-23 to 50cm long
•Males 1.5 to 4.5 cm long
•Microfilaria-220 to 360 microns
•Adult worms and microfilaria
Both found in humans.

4. Hanging groin
Onchocercoma
Leopard skin changes

5. Dog heart worm
Adult female
•D.imitis ,females 25 to 30 cm
•Males-12 to 18 cm
•Immature worm in humans
•D.tenius and D.repens commonly
Obtained from conjuctiva
•Histological section-calcoflour
White.

6. Adult worm
T.Canis
T.cati
Cross section of
worm with
inflamatory
changes
Egg of toxocara canis

7. Eggs of toxocariasis
Occular larva migrans
•Females-18 cm long
•Males-10 cm long
•Infective stage in humans-l2

8. •Females-5 to 7 cm long
•Males-3 to 3.5 cm long
Adult worm found
in skin and sc

10. Female adults-2.2 to3.2cm
Males 2 to2.5cm
Young adults found in humans

11. onchocer
ca
1.Size
dirofilari Loa loa
a
F-2050cm
m-4.5cm
F-25 to
30cm
M-1018cm
toxocara
F-5 to7cm F-18cm
M-3.5cm
M-10cm
2.Stage in Adult and Immature Adult and Larva
humans
microfilar worms in microfilar stage 2
ia
humans
ia
3.Microfil
aria
No
sheath,no
nuclei till
tail
Sheathed
with
nuclei
extending
till tail
Angiostro
ngulus
cantonen
sis
F-3.5cm
M-2.5cm
Young
adult