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Table 3 Antimicrobial activity (radius of suppressed microbial growth zone in mm) and DPPH RSA spectrophotometric data (% inhibition) of propolis extracts

From: Alternative preparation of propolis extracts: comparison of their composition and biological activities

Propolis extracts

DPPH RSA (%)

Reference microbial cultures

Staphylococcus aureus ATCC 25923

Escherichia coli ATCC 25922

Pseudomonas aeruginosa

ATCC 27853

Klebsiella pneumoniae

ATCC 33499

Bacillus cereus ATCC 8035

Candida albicans ATCC 60193

W1

26.3

0

0

0

0

0

0

W2

65.8

16.2 ± 1.2

16.0 ± 1.4

18.3 ± 1.1

19.4 ± 1.3*

16.9 ± 1.1

19.0 ± 0.5

A1

20.6

0

0

0

0

0

0

A2

58.1

16.6 ± 1.5

16.2 ± 1.7

17.3 ± 1.4*

20.5 ± 1.1 *

17.8 ± 0.9

20.3 ± 1.2

EEP

52.1

15.8 ± 0.7

14.8 ± 1.0

15.2 ± 1.5

15.4 ± 0.9

17.2 ± 0.6

16.9 ± 1.4

Positive

Control

 

Ampicilinum

19 ± 0.5

Ampicilinum

13 ± 1.4

Ceftazidinum

16 ± 1.2

Cefuroximum

18 ± 0.6

Ampicilinum

10 ± 1.0

Fluconazolum

18 ± 1.3

  1. 0 - examined preparation has no activity on growth of investigated microbial cultures. Number of experiments – 4–6. * - P < 0.05 vs EEP