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Vibriosis

Vibriosis

Symptoms

Bloody lesions on body
Body shows one or more bloody lesions, where leeches have eaten into flesh.
Subepithelial petechiae
Small bloody red dots or effusions, evident below skin.
Ulcers - irregular
Irregular shaped ulcers are evident on the skin.
Dark body colouration
The colours of the fish are darkened beyond their normal shade.
Haemorrhages - skin
Bloody haemorrhages are apparent over several parts of the skin.
Hyperaemia - general (Fin)
Excessive blood evident all over the fins.
Loss of scales
Scales are missing on skin, usually in several places.
Fins folded
The fins of the fish remain in a closed position due to discomfort.
Hyperaemia - fin base only
Excess of blood at base of fin.
Reluctant to feed
Fish comes to eat but with evident lack of appetite.

Causes

Bacteria, viz. Vibrio spp. all manifest similar symptoms. Can affect almost any marine, brackish and freshwater species.

Prognosis

Usually fatal in 2-3 days if untreated. Very contagious. Rapid treatment is vital if fish are to have any chance. Infection tends to stay in tanks for a long time.

Treatment

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Prevention


DNA and RNA diagnostic references

Vibrio Related Diseases in Aquaculture and Development of Rapid and
Accurate Identification Methods.


From J.of Mar Sci: Research & Development Apr. 2012. 

Shruti Chatterjee et al. Nat. Inst. Oceanography, Reg.Ctr.
Mumbai India

Pictures

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