“Consider the difference in size between some of the very tiniest and the very largest creatures on Earth. A small bacterium weights as little as 0.00000000001 gram. A blue whale weighs about 100,000,000 grams. Yet a bacterium can kill a whale … . Such is the adaptability and versatility of microorganisms as compared with humans and other so-called “higher” organisms, that they will doubtless continue to colonise and alter the face of the Earth long after we and the rest of our cohabitants have left the stage forever. Microbes, not macrobes, rule the world. —Bernard Dixon, 1994”