FMM Broth is a medium used for the cultivation of Tenacibaculum maritimum (formerly Flexibacter maritimus) which is responsible for Flexibacteriosis marina, one of the most important bacterial diseases affecting marine lives around the world. This has an important economic impact to aquaculture producers. The infection has a variety of clinical manifestations depending on the species and age of fish, the most significant symptom being the presence of gross lesions on the body surface. It is, currently, the main pathological problem in turbot and sole cultivation affecting all ages of fish. Casein peptone provides nitrogen, vitamins, minerals and amino acids essential for growth. Yeast extract is a source of vitamins, particularly of the B-group. The rest of the components provide the salinity requirements that make the medium similar to sea water. The isolated bacteria are biochemically characterized by conventional methods in plates and tubes. They are gram-negative filamentous bacillus, oxidize and catalyse positive, nitrate reductors and incapable of producing sulphydric acid. They are negative for the test of indole and methyl red. To confirm the taxonomic position perform molecular and serological tests (PCR).
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