Answer
Escherichia coli
Work Step by Step
Escherichia coli is normally commensal in the human intestine but usually becomes pathogenic if a toxic gene is acquired from a Shigella bacterium.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.