aeruginosa and Staphylococcus aureus In Vitro

Summary. Biofilms are communities of microorganisms that can be found in almost every habitat. They can be attached to a surface and protected by an extracellular matrix of biomolecules that substantially protect microorganisms from environmental effects. The aim of this research is to explore the potency of essential oils from Cinnamomum burmannii Nees ex Bl. and Massoia aromatica Becc. against planktonic growth and biofilm formation of, two opportunistic pathogens, Pseudomonas aeruginosa PAO1 and Staphylococcus aureus Cowan I. Essential oil from C. burmannii and M. aromatica showed a 50 % inhibition of P. aeruginosa and S. aureus planktonic growth (PMIC50) at concentration of 0.12 % v/v. Essential oil from C. burmannii and M. aromatica showed capability to inhibit 50 % (MBIC50) of P. aeruginosa and S. aureus biofilm formation at concentration of 0.03 % v/v, whereas higher concentration (0.12 % v/v) was needed by C. burmannii and M. aromatica oil to disrupt 50 % of P. aeruginosa and S. aureus established biofilm. The analysis by GC-MS showed cinnamic aldehyde (92.02 %) to be the major component of C. burmannii essential oil, whereas Massoialactone (92.05 %) was the mai