SYNERGISTIC EFFECT OF SOME PLANT EXTRACTS AND ANTIBIOTIC DRUGS AGAINST STAPH. AUREUS ISOLATED FROM PLEURAL FLUID IDENTIFICATION OF THE ACTIVE COMPOUNDS

Abstract

A total of 75 pyogenic samples were collected from patients examinated for pyogenic infection in Sednawy hospital and Elmokhtaber laboratories. S. aureus isolated from pleural fluid out of five S. aureus (+ve coagulase, MSSA) exhibits resistant against all the concentration of Ciprofloxacin 0.5-20, Gentamycin 0.5- 5.0 µg/100µl and Amikacin 1 µg/100µl. The highest potent of phytoextracts either extracted by water or methanol was detected by clove comparing with mint, thyme, sage and garlic, whereas garlic essential oil gave completely abolish of S. aureus (P.F). The highest synergism was obtained in combination between the lowest inhibitory concentration of Gentamycin 10 µg/100µl or Vancomycin 1 µg/100µl or Amikacin 2.5 µg/100µl with thyme Eso (1:3), which resulted to increase the efficacy by 4.4 or 1.5 or 1.6 respectively comparing to recommended dose of the tested antibiotics alone. Increasing the concentration of garlic essential oil (GEso) from 10 up to 100 µl/well increment the efficacy of inhibition up to 10, 3.7 and 4.5- fold when standard dose of Gentamycin, Vancomycin and Amikacin were used individually against S. aureus P.F. The minimum bactericidal concentration of garlic essential oil was recorded at 2 µl/ml as it resulted to reduce the count to be 0.04%. Analysis of garlic essential oil by GC-MS dedicated six sulfur compounds represented 88.8644% of total detected compounds in garlic essential oil.

Keywords

• s.aureus
• antibiotics
• phytoextract
• synergistic effects
• mbc
• 16s rrna
• gc-ms spectrometry