Our best blend for potent antibacterial action is a combination of Clove, Rosemary, Eucalyptus, Lemon and Cinnamon. Essential oils considered to have potent antibacterial action: Tea Tree • Studied for MRSA treatment; the most commonly aromatic used as an antiseptic and antibacterial. Geranium • Also studied for MRSA treatment, excellent anti-fungal as well. Oregano • VERY potent, should be used with caution. Dilute concentrations only. Not for use on skin. Taken in capsules to treat IBS. Cinnamon • Also VERY potent, not for use on skin. Included in small amounts in blends. Lemon • Gentle yet effective oil, often used as household cleaner/spray. Wonderful bright aroma. Lemon Tea Tree • Potent cleanser of the air, strong antiseptic with pleasing lemon-like aroma. Myrtle • Gentle antibacterial essential oil used in acne formulas. Palmarosa • Pleasant scented alternative to Tea Tree, used in skin and hair care recipes. Myrtle • Balancing of over-oily conditions, antiseptic, gently stimulating and regenerative. Rosalina • Called 'Lavender Tea Tree' as in incorporates the antibacterial action of Tea Tree and the soothing effects of Lavender. Exellent for children. Eucalyptus • High 1,8 Cineol concentration, specific to bacterial infections of the respiratory system. Hope this helps......