What detected H. pylori CagA means, and how to clear it
CagA is the single most important virulence factor on H.
What is H. pylori CagA?
CagA (cytotoxin-associated gene A) is one of the most clinically important H. pylori virulence factors. CagA-positive strains carry a pathogenicity island that injects the CagA protein directly into your stomach cells via a needle-like type IV secretion system. Once inside, CagA hijacks intracellular signaling, causes cell elongation and disruption of cell-to-cell junctions, and substantially raises the long-term risk of peptic ulcers and gastric cancer compared to CagA-negative strains. Roughly 60 to 70 percent of H. pylori strains worldwide are CagA-positive, with higher rates in East Asian populations. A positive CagA result on a stool test is a meaningful escalation flag. It does not change whether eradication treatment works, but it does change the urgency of pursuing eradication and the importance of post-treatment confirmation testing.
What does detected H. pylori CagA indicate?
CagA is the single most important virulence factor on H. pylori — a bacterial oncoprotein that injects into gastric epithelial cells and strongly associates with peptic ulceration and gastric cancer. Eradication is a stronger clinical priority when CagA is positive. The protocol mirrors H. pylori eradication food support but emphasizes stricter anti-inflammatory foods.
Symptoms commonly reported
- persistent burning stomach pain
- ulcer-like symptoms
- nausea
- unexplained weight loss
- iron deficiency anemia
- B12 deficiency
Not everyone with this finding has every symptom. Many people have several without realizing they share a root cause.
Reference ranges
A value just over the threshold is usually less urgent than a value many times outside the range. Trend across retests matters more than a single number.
The 6-week protocol for detected H. pylori CagA
A phased plan with 11 food prescriptions across three phases. Below is the first phase preview. Upload your lab to unlock the full protocol with exact quantities, frequencies, and conflict-resolved sequencing.
- Broccoli sprouts (fresh) See your personalized dose
- Mastic gum capsules See your personalized dose
Unlock your full personalized protocol
Most people have 4 to 7 abnormal markers on a single test. Upload your PDF and we'll build the 6-week protocol that handles all of them in the right order, with conflicts resolved and a grocery list ready to send to Instacart or Kroger.
Upload my lab PDFWhich tests measure H. pylori CagA?
- GI-MAP (Diagnostic Solutions)
- Doctor's Data GI360
Different labs use different methodologies (qPCR, 16S sequencing, shotgun metagenomics), so absolute numbers may not be directly comparable across tests. We accept GI-MAP, Genova GI-Effects, and Biomesight PDF uploads today.
