Worm Identification

Question 1

Identify this worm…

Answer 1

Telodorsagia circumcincta

• male = smaller than female, bursa + spicules
• whole worm is slender pink-brown
• fine cervical papillae at head end

Question 2

Identify each of these worms + explain how…

Answer 2

1. Largest = haemonchus contortus -> barbers pole (eggs in uterus wrapped around intestine)
2. Middle = telodorsagia circumcincta
3. Smallest = trichostrongylus spp -> very small/ hair-like

Question 3

How can Trichostrongylus spp be identified?

Answer 3

• ‘Notch’ / excretory pore @ head end of worm
• males = bursa + short/ stout/ unequal spicules

Question 4

Identify this worm…

Answer 4

Cooperia = ‘watch-spring’ worm

• cephalic vesicle
• males = short stumpy spicules

Question 5

Identify this spp of worm…

Answer 5

Nematodirus Battus -> ‘tangled cotton wool’

Question 6

What are the identifying features of nematodirus battus?

Answer 6

Bubble-like cephalic vesicle