Determination of Minimum Inhibitory Concentrations of Antimicrobial Herb and Spice Extracts against Flavobacterium columnare

Bacterial diseases like columnaris caused by Flavobacterium columnare, has huge economic impact on aquaculture industry. Proven the low efficacy of vaccines and tight regulations with antibiotic usage, there is a need for alternative therapeutics. We have previously found that methanolic extracts (50 mg/ml) from eleven herbs and spices had bactericidal effects against Flavobacterium columnare (3 × 108 CFU/ml). In the present study we determined...