<prompt> Stool examination is required for diagnosis of infection with -Staph food poisoningClostridiaShigellaAll  <response>: Ans. is a i.e., Staph food poisoning; b i.e., Clostridia; c i.e., Shigella All these organisms option a to d can cause diarrhea and stool should be examined for diagnosis. Diagnostic approach to infectious diarrhea . After the severity of illness is assessed, the most impoant distinction that the clinician must make is between inflammatory and noninflammatory disease. . Examination of a stool sample is an impoant supplement to the narrative history. . Stool should be examined for blood, leukocytes and mucus. . Fecal lactoferrin is a marker of fecal leukocytes and can be detected by later agglutination or ELISA. For options e Since pinworm E. vermicularis eggs not usually released in the bowel, the diagnosis cannot be made by looking for eggs in the feces. 