Many species of protozoa can infect humans, but most are commensals and cause no disease. Their presence in the stool, however, is an important indicator that the patient had ingested some fecal matter, and so their identification has diagnostic value. In addition, it is important for the clinician to recognize these organisms as commensals rather than, in ignorance, to treat the patients unnecessarily.
KeywordsPeriodontal Disease Large Intestine Pleural Fluid Fecal Matter Entamoeba Histolytica
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