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Test Code Billings Clinic: 4830 Norovirus Direct Detection, Stool

Performing Laboratory

Montana Public Health Laboratory, Helena, Montana

Useful For

Norwalk-like viruses (NLVs), initially known as small round structured viruses (SRSV), are single-stranded RNA viruses. NLVs are a major cause of viral gastroenteritis in children and adults. Large outbreaks haven been reported in hospitals, cruise ships, schools, and residential homes. Based on molecular techniques, 3 genotypes have been identified. Only genotype 1 and 2 are associated with human infections. The difference between genotype 1 and 2 is not related to disease severity.

Methodology

Nucleic Acid Amplification 

Specimen Requirements

  • 3 g (minimum volume:  2 g) of stool in a clean, dry, leakproof container with a tightly-fitting lid.
  • No preservative.
  • Send specimen refrigerated.

Reference Values

Reference values are included with patient’s report.

Day(s) Test Set Up

Monday through Friday

Test Classification and CPT Coding

83891 - extraction

87798 - amplified probe