Clinical review pending: These new source-based editorial revisions have not been reviewed or approved by the historically credited practitioner. This guide is educational, not a diagnosis or a substitute for clinician-ordered testing.
GI-MAP™ and a conventional stool culture answer different questions. Culture grows selected bacteria from a sample. Targeted qPCR detects specified microbial DNA, whether or not the organism can still grow. A positive DNA result alone does not prove active infection, the cause of symptoms or the need for treatment.
Which method detects what?
| Question | GI-MAP™ targeted stool qPCR | Conventional stool culture |
|---|---|---|
| Measured signal | DNA of specific organism targets | Growth of bacteria under laboratory conditions |
| Viability | DNA may remain after organisms are no longer viable | Usually requires viable organisms |
| Results | Target-dependent quantitative or qualitative measurements; other GI-MAP™ markers use different methods | May recover an isolate for susceptibility testing |
| Limitations | Only included targets are tested; detection does not establish symptom causation | Recovery depends on handling, culture media and targets ordered |
Is stool PCR always more sensitive?
Some molecular assays detect pathogens not recovered by routine cultures, but performance depends on the specific assay, target and specimen. There is no defensible universal limit of “one organism per 10 g” or basis to claim GI-MAP™ will always find infections missed by a culture. Published accuracy studies of separately validated acute infectious-diarrhea PCR panels do not automatically validate this named commercial test.
When does a clinician need culture?
For bloody diarrhea, fever, severe abdominal pain or systemic illness, seek timely medical assessment rather than choosing a wellness panel as a replacement. IDSA guidelines recommend clinical selection of stool testing; a positive culture-independent result can require follow-up culture for public-health reporting or antibiotic susceptibility. Your clinician may choose a validated acute-infection PCR panel, a culture, an antigen assay or another targeted test.
What is included in GI-MAP™?
Diagnostic Solutions Laboratory describes GI-MAP™ as selected microbial qPCR targets plus additional intestinal markers measured by different assays. Review the Standard panel and example report. Neither a microbial DNA count nor a digestive marker, in isolation, establishes diagnosis, treatment choice or improvement.
Processing time and ordering
The lab normally takes 10–16 business days after receiving the sample; after release, we typically need 1–3 more business days to process and email results. An intake form is required per person after payment and before practitioner lab ordering. Do not delay urgent medical care while waiting for this panel.
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References and next steps
- IDSA infectious diarrhea clinical guidelines (method interpretation, culture follow-up).
- Diagnostic Solutions Laboratory: GI-MAP™ test overview (included targets).
- Sample collection and compare available test panels.