Acta Periodica Technologica 2011 Issue 42, Pages: 263-269
https://doi.org/10.2298/APT1142263V
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Antibacterial activity of Beta vulgaris L. pomace extract
Velićanski Aleksandra S. (Tehnološki fakultet, Novi Sad)
Cvetković Dragoljub D. (Tehnološki fakultet, Novi Sad)
Markov Siniša L. (Tehnološki fakultet, Novi Sad)
Vulić Jelena J. (Tehnološki fakultet, Novi Sad)
Đilas Sonja M. (Tehnološki fakultet, Novi Sad)
Antibacterial activity of Beta vulgaris L. (beetroot) pomace extract
(concentration 100 mg/ml) was tested against five Gram positive and seven
Gram negative bacterial strains (reference cultures and natural isolates).
Disc diffusion method with 15 µl of extract and agar-well diffusion method
with 50 and 100 µl were used. Antibiotic (cefotaxime/clavulanic acid) was
used as a control sample. The tested extract showed the highest activity
against Staphylococcus aureus and Bacillus cereus, where clear zones (without
growth) appeared. There was no any activity against other tested
Gram-positive bacteria, except for Staphylococcus epidermidis, with a small
zone of reduced growth. Growth of all tested Gram-negative bacteria was
inhibited usually with 100 µl of extract. The most susceptible were
Citrobacter freundii and Salmonella typhymurium. The tested antibiotic gave
clear, usually large zones for all tested strains except for Staphylococcus
cohni spp. cohni, where only a zone of reduced growth appeared.
Keywords: Beta vulgaris L., beet root pomace extract, antibacterial activity, agar-well diffusion method