salmonella and e. coli

Question
what's the difference between e.coli and salmonella? aren't they both from undercooked meat?

Answer
The Salmonella germ is actually a group of bacteria; microscopic living creatures that pass from the feces of people or animals, to other people or other animals. There are many different kinds of Salmonella bacteria. Salmonella serotype Typhimurium and Salmonella serotype Enteritidis are the most common in the United States. Salmonella has been known to cause illness for over 100 years. They were discovered by a American scientist named Salmon.
E coli (escherichia coli)are really 4 classes of enterovirulent E. coli (collectively referred to as the EEC group) that cause gastroenteritis in humans. Among these is the enterohemorrhagic (EHEC) strain designated E. coli O157:H7.

E. coli is a normal inhabitant of the intestines of all animals, including humans.

    When aerobic culture methods are used, E. coli is the dominant species found in feces. Normally E. coli serves a useful function in the body by suppressing the growth of harmful bacterial species and by synthesizing appreciable amounts of vitamins.
 It's just a minority of E. coli strains that are capable of causing human illness.

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