Sensitivity of Bacteria Isolated from Fish to Some Medicinal Plants

Alcoholic and aqueous extracts from 22 species of herbs from Bolu (Turkey) were screened for antibacterial activity against Aeromonas hydrophila, Yersinia ruckeri, Lactococcus garvieae, Streptococcus agalactiae and Enterococcus faecalis. Extracts with various solvent of Nuphar lutea, Nymphaea alba, Stachys annua, Genista lydia, Vinca minor, Fragaria vesca, Filipendula ulmaria, Helichrysum plicatum showed the highest inhibitory activity. The ethanolic extract of V. minor and the alcoholic and aqueous extract of N. lutea displayed a broad antibacterial spectrum against the target organisms. The possible usage of herbs as an alternative to synthetic antibiotics is discussed.