and bacterial strains were screened from the skin lesions or yellow areas of Nile tilapia and Catfish
samples on cytophaga agar supplemented with polymycin B and neomycin. Among 36 bacterial
isolates, 9 (from Nile tilapia) and 27 (from Catfish) isolates showed yellow-orange pigmented
colonies, adhering tightly to the agar medium and rhizoid edges, slender and long bacilli