In most cases, this microorganism lives as a commensal, without causing damage, sometimes collaborating with the physiological functions of the host organism. There are, however, some types of E. coli which have such a pathogenicity that they can cause even very serious diseases, such as enteritis, hemorrhagic colitis, urinary infections, meningitis and septicemia.
The most frequent disorders related to the pathogenic character of E. coli they occur in the intestine, where colonization typically causes diarrhea and crampy abdominal pain.
.In fact, there are many "types" of E. coli. In most cases, these bacteria are commensal, therefore HARMFUL (as, for example, when they participate in the functions of the bacterial flora of the intestine). E. coli they can behave as PATHOGEN, that is they acquire an "aggressive" character, to the point of inducing disease.
