Flavobacteriosis in trout (Internal Lesions): This is a disease caused by different bacteria from the genus Flavobacterium. In addition to external lesions, characterized mainly by external ulcerations and ocular haemorrhages, these bacteria internally produce marked congestion of the internal organs, with a highly developed spleen (splenomegaly), as can be seen in the image.

Authors: Julio Gonzales & Alfredo Palomino, Perú