Bacteria is a member of a large group.It is found in every habitat on earth example ,rock, soil oceans and even arctic snow .They can also live in plants ,animals and even humans. Symptoms is a mental feature.You have to stay home and be careful go to the doctor and tell them what you have so they can check you up and give you a prescription.Nobody knows who gets it its an infection that spreads all around.See your doctor for help and get test.E.coli is a bacterium found in human intestines and animals where it never causes harm.