Test for Pathogens: GI-Map

The Diagnostic Solutions Laboratory GI Microbial Assay Plus (“GI-MAP”) looks for the presence of pathogens – including H Pylori and other bacteria, parasites, fungi and viruses – in the gastrointestinal tract.

If you are interested in this test, please contact me here.


  • Bacterial Pathogens (Campylobacter, C difficile Toxin A & B, E coli 0157, Salmonella, Shiga-like Toxins, Shigella, etc.)
  • Parasitic Pathogens (Cryptosporidium, Entamoeba histolytica, Giardia)
  • Viral Pathogens (Adenovirus, Norovirus, Rotavirus)
  • H pylori (H Pylori, cagA, vacA)
  • Normal Bacterial Flora (Bifidobacter, Enterococcus, E. coli, Lactobacillus)
  • Opportunistic Bacteria (Citrobacter, Klebsiella, Proteus, Yersinia, Pseudomonas, Staphylococcus, etc)
  • Parasites (Blastocystis hominis, Dientamoeba fragilis, Endolimax nana, Entamoeba coli, Chilomastix mesnelli, etc.)
  • Fungi/Yeast (Candida albicans, Candida spp., Geotricum spp., Microsporidia spp., Trichosporon spp.)
  • Additional Tests (SIgA, Anti-Gliadin, Elastase, Lactoferrin, Occult Blood)
  • Antibiotic Resistance Genes

To detect pathogens, the lab uses PCR (Polymerase Chain Reaction) technology to detect the DNA of microorganisms.


  • Test Type: Stool (1-day single specimen collection)
  • Cost: Pre-pay cash price is $359 for U.S. clients. Insurance is an option. If you are insured, let’s talk about how this works

Additional info:

  • You do NOT need to be off medications, anti-microbials, antibiotics or herbal supplements prior to collecting the stool sample.
  • You should AVOID taking aspirin for 2 days prior to collecting the sample.
  • Lab processing/shipping of kits is 1 week, the turn-around time to receive the results back is 21 business days from when the lab receives the samples

Advantages of this test:

The GI-MAP is the first FDA-approved DNA/PCR assay for GI pathogens, making the results more widely accepted.

PCR technology provides the ability to identify bacteria, parasites, viruses, and fungi regardless of their viability in the sample.

Stool cultures grow only aerobic bacteria but 95% of the bacteria in the digestive system are anaerobic, including the pathogens. It is not possible to measure strict anaerobes, viruses, or virulence factors with a culture based test. Parasites need to be in high numbers to be detected by microscopy, so there are times when O&P (Ova & Parasite) testing may miss pathogens that might be detected by PCR.

It tests for H pylori and identifies if the H pylori is one of the more virulent strains (cagA or vacA) which has been associated with ulcers and gastric cancer.

DNA/PCR assays are superior at detecting Giardia and E histo, as very low amounts of these parasites are typically shed in the stool.

DNA/PCR assays are far more sensitive in picking up Candida than culture based stool tests.

In addition to looking for pathogens, this test panel contains several additional markers which can provide invaluable insight into gut immunity (SIgA), gut inflammation (lactoferrin), pancreatic enzyme sufficiency (elastase), and gluten sensitivity (anti-gliadin).

If you are interested in this test, please contact me here.