What it is: A stool virus test detects viruses that cause gastroenteritis, most commonly via a rapid antigen test for rotavirus or norovirus, or a broader PCR-based panel that can also cover adenovirus, sapovirus, and astrovirus.
Why it's ordered: Ordered to confirm the cause of acute diarrhea and vomiting, especially in young children, hospitalized patients, or during suspected outbreaks (daycares, cruise ships, nursing homes); often used alongside stool culture or O&P testing to rule out bacterial or parasitic causes.
What it detects: Rotavirus and norovirus are the two most common targets of rapid stool tests; PCR panels can additionally identify adenovirus, sapovirus, and astrovirus, which don't have quick standalone tests.
Collection & prep: A fresh stool sample is collected in a clean container per the lab's kit instructions; no dietary or medication restrictions are typically required beforehand.
Results:
Positive – virus identified (e.g., rotavirus particles seen or a PCR match), confirming viral gastroenteritis
Negative – doesn't rule out a viral cause entirely, since rapid tests don't cover every gastroenteritis virus
Possible complications of viral gastroenteritis: Antibiotics aren't effective against viruses, so treatment is supportive; the main risk is dehydration from fluid loss, which can be serious in young children, older adults, and the immunocompromised and may require rehydration therapy.
Statements made in the Clinical Manual have not been evaluated by the FDA. The products mentioned are not intended to diagnose, treat, cure or prevent any disease.
