are much too small to see, yet they cause many of plants and animals. They are often spread in dirty water, although they can be killed by boiling water. Diseases of humans include actinomycosis, anthrax, brucellosis, bubonic plague, cholera, cystitis, dental caries (tooth decay), diptheria, dysentery, food poisoning, gangerine, gastroenteritis, gingivitis, gonorrhoeae, infection of post-operative wounds, infectious jaundice, legionnaires disease, leprosy, meningitis, pinta, pneumonia, psittacosis, pus-forming diseases, rat-bite fever, relapsing fever, rheumatic fever, rocky mountain spotted fever, scarlet fever, septicemia, shigellosis, skin infections, syphilis, tetanus, , tuberculosis, typhoid fevers, typhus, whooping cough and yaws. There is information about good and bad bacteria here.
However itís not all bad news. Bacteria can bring some benefits too.
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