There are usually intermediate steps, sometimes many of them. Among the more common causes are:
Some of the diseases that can be passed via the fecal-oral route include:
Fecal DNA vs fecal occult blood for colorectal cancer screening in an average risk population.(Abstract & Commentary)
Jan 15, 2005; Synopsis: Most neoplastic lesions are not detected either by Hemoccult screening or by multitarget analysis of fecal DNA....
Fecal incontinence: an overview of the causes, treatments, and interventions to address bowel incontinence in the elderly.(Incontinence)
Oct 01, 2010; fecal incontinence, an involuntary passing of stool, affects 45-50% of nursing home residents. (1-3) Dual incontinence...