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The scientists took samples of those plants, tested them and discovered most had antibacterial properties.

Same with coconut oil, which has antibacterial properties that could help reduce dark spots and tighten skin.

Building on previous work, researchers in ACS Infectious Diseases have demonstrated a potential antibacterial treatment from a modified darobactin, a compound originally from a bacterium.

"If food-allergic people can board first, and have time to clean their seat area with something like a baby wipe or antibacterial wipe, they are much less likely to have accidental reactions," Prof Turner said.

All four plants showed antibacterial activity against at least one multidrug-resistant strain of the bug, E. coli.