If you have ever had food poisoning or tooth ache, then it was probably some kind of pathogen that laid you low. Find out what that bad bacteria looks like at the Bacteria Museum, which provides photographs, consumer guides, fact sheets, and scientific links to further information. Food and water safety, the evolution of these microorganisms, the body's immune system, and how we fight bacteria are all covered as are bacteriophages, tiny viruses that live in bacteria.