Is all e.coli bad for you?

No: E. Coli is a very common (and normal) bacteria found in the human intestinal system. It is only certain strains that can be deadly if infected.

Depends: E coli are normal part of the colonic bacterial flora and this relation is mutually beneficial. Some strains of e. Coli are pathogenic and are bad.

No: Every human and most animals have E.coli as an innocent hitchhiker germ in their intestines. The germ is a family of many strains, & some strains are more worrisome than others, since they can create toxins, cause bad diarrhea or even kidney shutdown.