It is systemic fungal disease infected fish and the mortality rate may reach to 50% .

the bad mangement and bad environmental facter are consedar the predesposing facters as increase pH AND INCREASE AMMONIA concentration in water and decraese water level.

the pathognomic lesion for these disease is gill has as mosaic appearance

thank you very much

Infected fish exhibit respiratory symptoms and a loss of equilibrium. The gill appears necrotic, eroded and pale.

Mortalities can occur in less than 48 hours and can reach 50% of the herd.

Thank you Haidar Alsaedi

http://www.aun.edu.eg/developmentvet/fish%20diseases/4_1.htm

Thank you dear Dr. hiba

https://www.researchgate.net/deref/http%3A%2F%2Fwww.aun.edu.eg%2Fdevelopmentvet%2Ffish%2520diseases%2F4_1.htm

Thank you so much dr. Hiba

Thank you shaban

https://www.researchgate.net/deref/http%3A%2F%2Fwww.aun.edu.eg%2Fdevelopmentvet%2Ffish%2520diseases%2F4_1.htm

Fish Diseases. Branchiomycosis (gill rot) Definition: It is a fungal disease involving gill tissues, affecting the most species of freshwater fish.

Symptoms and Causes of Fin Rot. The most common causes of fin rot are poor water quality and improperly low water temperature. Overcrowding the tank, feeding outdated food or overfeeding the fish, and moving or handling the fish can also cause stress leading to fin rot. Fin rot can be the result of a bacterial infection (Pseudomonas fluorescens, which causes a ragged rotting of the fin), or as a fungal infection (which rots the fin more evenly and is more likely to produce a white 'edge'). Sometimes, both types of infection are seen together.

Regards

It is a fungal disease involving gill tissues, affecting the most species of freshwater fish. The disease is caused by Branchiomyces sanguinis and Branchiomyces demigrans.

Thank you Ahsan Siddiqui

Thank you Khansaa Azeez Obayes Al-Husseini

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