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Fisheries > Culture Fisheries > Seafishes >Pearlspot

Disease management

Pearl spot is prone to many diseases mainly caused by wide fluctuations in environmental parameters. The most common disease causing agents are bacteria including Pseudomonas, Alcaligenes, Flavobacteria, Moraxella, Vibrio and gram-positive Micrococci, Athrobacter and Bacillus spp.

Bacterial diseases of E. suratensis

Disease

Aetiological agent

Gross clinical signs

Drugs

Administration

Vibriosis

Vibrio
anguillarum

Erythema of the skin and fins,
petachiae in the mouth, swimming at water surface, body darkening, abdominal distension, corneal opacity, anorexia, pale gills, enlarged or liquified spleen and kidney & myocardial lesions.

Terramycin/

Chloromycin

Along with feed, at rate of 75 mg/kg body weight for 7-21 days.

Skin spottiness

Vibrio fischeri

Shallow to deep sores with fluid and/or blood and weak movements.

Terramycin

Along with feed, at rate of 75 mg/kg body weight for 7-21 days.

Gill rot

Klebsiella
pneumoniae

Isolated movements, anorexia, restlessness, floating at surface, orientation against current, gill tissue decay.

Nifurpirinol

1-10mg of drug in a litre of water as one hour bath for 7-21 days

Tail rot

Proteus vulgaris

Loss of natural colour, fraying of tail/fin tissue, swimming near water surface. Ecchymosis may be noticed.

Acrrflavin

Bath in 1-5 mg of drug in litre of water for 7-21 days (Nifurpirinol may be used).

Fin rot

Pseudomonas
stutzeri

Loss of natural colour, fraying of tail/fin tissue, swimming near water surface. Ecchymosis may be noticed.

Acroflavin

Bath in 1-5 mg of drug in litre of water for 7-21 days (Nifurpirinol may be used).

Hemorrhagic
septicemia

Pseudomonas
aeruginosa

Body reddening, skin lesions, swollen belly, septicemia, protruding scales and sunken eyes, inflamed anus, spleen and swim bladder and anemia.

Gentamycin

Along with feed, 75mg/kg body weight for 7 to 21 days or Intraperitoneal injection of 20-40 mg/kg body weight.

Enteritis

Escherichia coli

Enteritis, sluggish movements, skin lesions, discolouration, swimming near surface, kidney infected

Sulphadiazine
Sulphizoxazole

Along with feed, 75mg/ kg body weight for 7 to 21 days

Mycobacteriosis

Mycobacterium
sp.

Progressive body weakening, damaged fins, swelling of abdomen, anorexia, discolouration, deformities in skeletal system, sluggish movement, opacity in cornea, listlessness, presence of tubercles.

Kanamycin
Gentamycin

Along with feed, 75mg/ kg body weight for 7 to 21 days

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