In viral gastroenteritis, fecal leukocytes are typically negative. Which statement best describes this finding?

In viral gastroenteritis, fecal leukocytes are typically negative. Which statement best describes this finding?

• A. Positive fecal leukocytes
• B. Negative fecal leukocytes
• C. Fecal leukocytes are variable
• D. Fecal leukocytes are present with blood

Answer: (B)

Viral gastroenteritis causes noninflammatory diarrhea. Viruses like norovirus and rotavirus damage the intestinal lining enough to cause watery stool, but they don’t provoke the kind of neutrophil-dominated inflammation that bacterial pathogens do. Because of this lack of mucosal neutrophilic infiltration, fecal leukocytes are typically not present in the stool. This contrasts with invasive bacterial infections (which invade mucosa and trigger leukocytes in stool, sometimes with blood), helping to distinguish viral from bacterial causes. So the finding that fecal leukocytes are negative is the best description for typical viral gastroenteritis.

Viral gastroenteritis causes noninflammatory diarrhea. Viruses like norovirus and rotavirus damage the intestinal lining enough to cause watery stool, but they don’t provoke the kind of neutrophil-dominated inflammation that bacterial pathogens do. Because of this lack of mucosal neutrophilic infiltration, fecal leukocytes are typically not present in the stool. This contrasts with invasive bacterial infections (which invade mucosa and trigger leukocytes in stool, sometimes with blood), helping to distinguish viral from bacterial causes. So the finding that fecal leukocytes are negative is the best description for typical viral gastroenteritis.