Efficacy of Essential Oils in In Vitro Control of Acinetobacter baumannii
DOI:
https://doi.org/10.12970/2311-1755.2020.08.03Keywords:
Medicinal plants, Essential compounds for treatment, Antimicrobials, Mechanisms of action, Acinetobacter baumannii, Infectious diseases.Abstract
Although Acinetobacter baumannii is common in nature and considered human skin and respiratory tract commensal, it has also been associated to serious infectious diseases, such as pneumonia, urinary tract infection, endocarditis, wound infection, meningitis and septicemia. The present study aimed to evaluate the intrinsic antimicrobial activity of essential oils on the Acinetobacter baumannii ATCC 17978 strain. We used essential oil of rosemary, artemisia, cinnamon, camphor, citronella, Indian clove, Eucalyptus globulus, Eucalyptus staigeriana, Eucalyptus citriodora, tea tree (also known as melaleuca), mint, oregano and sage, in concentrations that ranged from 0 to 100%. The antibacterial activity was determined through the broth microdilution method and through bactericidal kinetics of essential oils. All the oils performed antibacterial activity against Acinetobacter baumannii. citronella, Eucalyptus staigeriana and mint oils presented lower minimum inhibitory concentration and minimum bactericidal concentration. Oregano, tea tree and Indian clove oils presented higher bacterial death rate, and they canceled the microbial load of A. baumannii in up to 60 minutes.
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