Mucus like stool accompanied with what looks like blood. Could it be that e coli bacteria?

Causes of BRBPR. This may just be hemorrhoids from straining but bleeding from rectum (brbpr) may also indicate anal fissures, proctitis (due to infection, inflammatory bowel disease, radiation therapy, stercoral ulcers, rectal prolapse, trauma, etc.) or a bleeding source further upstream. Depending on your age, risk factors, current medication (aspirin, nsaids, anticoagulants can cause bleeding), see your doctor.