Common Diseases of Fish

Question 1

What two drugs can you use to anaesthetise a fish?

Answer 1

Phenoxethanol
MS222 Tricaine Methane

Question 2

List six diagnostic tests that are commonly used on fish.

Answer 2

Mucus scrapings
Gill and fin preparations
Bacteriology
Blood sampling
Radiography
Ultrasonography

Question 3

List five methods of giving medications to fish

Answer 3

In water-dips, baths
In food medication
Gavage
Injection
Topical

Question 4

Which fish zoonotic disease causes localised lesions?

Answer 4

Mycobacterium

Question 5

How should you euthanase fish?

Answer 5

Anaesthesia (MS222 or phenoxyethanol_ folloed by pentobarbitone injection

Question 6

Describe 6 steps to giving fish first aid

Answer 6

Test water quality
If low number involved, quarantine affected fish
Change 30% of the tank or pond water, drain down and then add fresh water
Add salt at the rate of 2g/l to reduce physiological stress
Stop feeding temporarily
Improve aeration