The GI-MAP — short for GI Microbial Assay Plus — is a comprehensive DNA-based stool analysis from Diagnostic Solutions Laboratory. It uses quantitative real-time PCR (qPCR) to detect selected microbial genetic targets, alongside separate assays for intestinal-health markers. Some findings are numerical and others are qualitative. From one sample it reports:
- Pathogenic bacteria, parasites and viruses
- Helicobacter pylori with its virulence factors
- Fungi and yeast such as Candida
- Selected commensal and opportunistic microbial targets
- Intestinal-health markers related to inflammation, immune response and digestion
Why qPCR and quantitative results matter
qPCR measures selected microbial genetic targets in the submitted sample. It does not measure every organism, and a detected genetic target does not by itself establish that a viable organism is present. GI-MAP also includes qualitative results and separate intestinal-health assays.
Clinical interpretation depends on symptoms, history, the assay and the reason for testing. A change on repeat testing does not, on its own, confirm treatment success; ask whether repeating the panel would answer a useful clinical question.