Studies on The Inhibitory Properties of Leaf Ethanolic Extracts Obtained from () Species Against Spp. Strains.

INTRODUCTION

The most frequently isolated bacteria in Polish aquaculture are of the genus; also pathogenic to human fish consumers, they cause substantial economic losses, and require antibiotic therapy to treat. Antibiotic residues in animal-derived food provoke concern. The aim of the study was to appraise the antimicrobial activity of ethanolic extracts of plant species against strains.

MATERIAL AND METHODS

Leaves of 41 species were collected from two Ukrainian botanic gardens. They were crushed, washed, homogenized in ethanol and centrifuged, and the supernatants were applied in the Kirby-Bauer disc-diffusion method to assess the susceptibility to them of , , and subsp. isolates confirmed as K886, K825, and St30 strains. Analogous assessment was also made of these bacteria's susceptibility to sulfonamides, quinolones, tetracyclines, and one amphenicol. Data were analysed statistically.

RESULTS

The majority of the extracts considerably inhibited bacterial growth, being susceptible to 14 species, subsp. to 13, and to 10.

CONCLUSION

Treatment with plant extracts has promise as an alternative to antibiotic therapy. Botanic gardens may offer new sources of plant-derived agents with a broad spectrum of biological and antimicrobial action. Further research will be useful to broaden knowledge of therapeutic potential.