Haemonchus contortus Flashcards Preview

Parasitology - Endoparasites > Haemonchus contortus > Flashcards

Flashcards in Haemonchus contortus Deck (11)
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1
Q

Hameonchus contortus causes haemonchosis. What are the clinical signs?

A

Anaemia (look at eyelids)
Oedema
Weight loss

2
Q

Where is haemonchus contortus found?

A

Abomasum of sheep, cattle, goats

Tropics and sub-tropics (doesn’t survive UK winter)

3
Q

How big is a Haemonchus contortus adult worm?

A

3cm

4
Q

Describe distinguishable features of Haemonchus controtus

A

Barber pole worm - white ovaries wrapped around gut
Cervical papillae
Asymmetrical dorsal lobe

5
Q

What is the lifecycle of haemonchus contortus?

A

Typical trichostrongyle lifecycle
L3 hypobiosis and burrow into abomasum, emerge L5
PPP of 3 weeks

6
Q

What is a unique feature of haemonchus contortus adults?

A

Feed on blood

7
Q

What is the pathogenesis of haemonchus contortus?

A

Feed on blood and erode abomasal wall

Causes haemorrhagic gastritis

8
Q

What is the main source of pasture contamination and why?

A

Ewes

Due to peri-parturient rise - immunocompetence decreases before parturition

9
Q

When does disease outbreak?

A

Late Summer

10
Q

Is there a vaccine for Haemonchus?

A

Yes in Australia

11
Q

How is Haemonchus controlled?

A

Drenches by benzimidazoles, imidathiazoles/tetrahydropyramidines, macrocyclic lactones
Monepantel and derquantel