Fish Pathogens

Question 1

Aeromonas salmonicida

Answer 1

most common bacterial pathogen of fish clinical signs are whitish plaques that may have a red peripheral zone which then become erosions/ulcers and lead to necrosis of the skin

Question 2

Fish anaesthesia

Answer 2

Tricaine methanesulfanate (MS222) – 21 day withdrawal period

Question 3

Ichthyophthirius multifiliis

Answer 3

“Ich” Largest protozoan parasite of the fish - usually affects fish in aquarium or hatcher-like environment. Clinical signs - erratic swimming and white spots on skin and gills

Question 4

Lymphocytis disease in fish

Answer 4

caused be an iridovirus and affect saltwater and freshwater fish. Clinical signs include cauliflower growths on the skin, the fins, and sometimes the gills.

Question 5

Mycobacteriosis in fish

Answer 5

most common chronic disease observed in aquarium fish, and lesions include skeletal deformations and ulceration/erosion of the fin