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CRUSTACEANS DİSEASES

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(1)
(2)

Ergasilus

• It is a parasitic disease caused by species of family Ergasilidae and affects gills of freshwater fish.

(3)

• Ergasilus sp.

(4)

Ergasilus

Source of infection: • Infested fish

• Water

(5)

Ergasilus

• Clinical Signs:

• Damage is due to attachment and feeding.

• Parasitic females feed on whole blood and mucous • Marbling appearance of gills

(6)

Ergasilus

(7)

• This allows the mouth (located on the underside of the body) to come into close contact with the gill surface.

(8)

Ergasilus

(9)

• The insertion of the antennae deep into the gill tissue causes

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• The combination of attachment and feeding exerts pressure on the gill filaments. This leads to compression and erosion of the surface

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