Antimicrobial and antibiofilm activity of extract vegetal Sambucus canadensis in food-borne pathogenic bacteria

Foodborne pathogens form biofilms with high resistance to biocides, disinfectants, and antibiotics. Plant extracts can be a potential alternative to combat them. This study evaluated the antimicrobial and antibiofilm activity of a plant extract (Sambucus canadensis) widely used in indigenous communities in Mexico. The work was carried out with bacteria isolated from organic food. The antimicrobial tests showed activity in all the strains evaluated, mainly in S. aureus 976, S. enterica 915, and E. coli 4753 (MIC 65.1 and 50 mu g/mL) respectively. Regarding the obstruction in the formation of biofilm, significant results of less than 35 % were found at the lowest concentration (0.01 mu g/mL) against the S. aureus CECT 976 and E. coli 4753 strains. Regarding the results in biofilm disintegration, E. coli CECT 4757, S. aureus CECT 976, and S. aureus CECT 4465 achieved up to 36 % disintegration under the lowest concentration of 0.01 mu g/mL, being statistically significant with respect to the control p < 0.0001. The results indicated that the plant extract has a high potential for antibiofilm activity against bacteria that affect food safety and pose risks to people ' s health.