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Table 2 Activity of top 10 essential oils that are active against stationary phase Staphylococcus aureus in terms of their activity against growing bacteria (MIC) and non-growing bacteria in drug exposure

From: Identification of essential oils with activity against stationary phase Staphylococcus aureus

Drug /essential

oil

Plant

MIC (μg/mL /%)

Viability of bacteria after 3 or 5 days of EO b exposure (0.25%) c

3 day

5 days

Gentamicin a

1

+

+

Sandalwood oil

Santalum spicatum

0.015

Amyris

Amycris balsamifera

0.015

+

Oregano

Origanum vulgare

0.015

+

Cinnamon bark

Cinnamomum zeylanicum

0.03

Allspice

Pimenta officicalis

0.06

+

Thyme white

Thymus zygis

0.125

Health shield

Cassia, clove, eucalyptus, lemon and rosemary

0.125

+

Bandit “Thieves”

cloves, cinnamon, lemon, rosemary and eucalyptus

0.125

Lemongrass

Cymbopogon flexuosus

0.125

Palmarosa

Cymbopogon martinii

0.125

+

  1. a The concentration of gentamicin used in drug exposure was 50 μM; b “EO” essential oil; c “-” No obvious colonies grew on TSB plate after drug exposure; “+” Obvious colonies were found on TSB plate after drug exposure