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DGGE profile of total bacteria (top) and PCA plots of the DGGE profiles (bottom). The first three letters stand for the EO: CLO, clove oil; EUO, eucalyptus oil; GAO, garlic oil; ORO, origanum oil; PEO, peppermint oil. The fourth letter represents the dose of EO: H, high (1.0 g/liter); M, medium (0.5 g/liter); and L, low (0.25 g/liter). All the essential oils and the control (C) were used in triplicate. Lanes M, molecular size marker.
