OMNIgene·GUT.
Microbiome DNA that survives the journey.

OMNIgene·GUT is DNA Genotek’s stool collection kit for the gut microbiome: a spoonful of stool into a tube of stabilising liquid, and the microbial DNA is fixed as it was in the body, stable at ambient temperature for 60 days by the maker’s figure, with no cold chain, ready for 16S, shotgun metagenomic and qPCR work in an accredited laboratory. Curated and supplied on the Humans Nexus platform; DNA Genotek is the manufacturer.

OMNIgene GUT ambient-stabilised stool microbiome collection tube by DNA Genotek, on the Humans Nexus platform
The device

OMNIgene·GUT stool collection.

OMNIgene·GUT is a stool microsampling device from DNA Genotek: the patient collects a small stool sample directly into the tube, and closing it mixes the sample with a stabilising buffer that locks the microbial profile at the point of collection. Per the manufacturer, the ambient-stabilised stool then travels at room temperature and reaches the laboratory without the degradation a raw sample would suffer in the post. Humans Nexus curates and supplies the device on its platform and assembles the clinical-grade kit around it; DNA Genotek is the legal manufacturer.

In the maker’s own figures, the kit collects a median 520 mg of stool, holds the DNA through ambient swings from −20 °C to 50 °C, keeps it stable at room temperature for 60 days, and yields around 12 µg of DNA per extraction, eight extractions to a kit. OMNIgene·GUT has carried a CE-IVD mark in Europe since the maker’s 2015 announcement and is research use only in the United States; device-level regulatory status is held by DNA Genotek.

Why it matters

Ambient-stabilised stool,
microbiome-ready.

A stool sample begins to shift the moment it leaves the body, which is why microbiome and GI work has historically leaned on cold chain. OMNIgene·GUT is designed by the manufacturer to lock the profile at collection, so an ambient-stabilised stool sample can travel by ordinary tracked post and still represent what was collected.

Microbiome & GIStabilised stool for microbiome profiling and gastrointestinal work, per the manufacturer.
Ambient, no cold chainDesigned to ship at room temperature by standard tracked return: no freezer, no dry ice.
Locked at collectionClosing the tube mixes the sample with a stabilising buffer that fixes the profile at the source.

What the record shows. In 17 stem-cell-transplant patients, stool placed in OMNIgene·GUT and frozen later gave 16S and shotgun profiles statistically indistinguishable from fresh-frozen aliquots of the same specimen (Scientific Reports, 2019); the paper’s methods name the device. And in 16 infants the maker’s metabolomics sibling, OMNImet·GUT, recovered 94.5% of the metabolites seen in flash-frozen stool (BMC Microbiology, 2021).

How it works

Collect. Stabilise. Return.

01Collect

The patient collects a small stool sample, about half a gram, into the OMNIgene·GUT tube with the spoon or toilet accessory, at home.

02Stabilise

Closing the tube and shaking it mixes the sample with the stabilising liquid, which fixes the microbial DNA at ambient temperature.

03Return

Ships by standard tracked return with no cold chain, inside the maker’s 60-day window; the laboratory extracts and sequences the stabilised sample.

On the platform

Assembled into a kit.

The OMNIgene·GUT device is curated onto the platform and assembled into a regulated Humans Nexus collection kit: device, stabilising buffer, tamper-evident return packaging and app-guided instructions, under its own UDI.

The deviceOMNIgene·GUT for stool, curated and supplied on the platform.
The stabilisationThe buffer that locks the sample at collection, plus tamper-evident return packaging.
The guidanceApp-guided instructions for a clean collection at home.

See the microbiome kit →

Who it’s for

For microbiome and GI work.

LaboratoriesAmbient-stabilised stool from the home
Pharma & CROMicrobiome endpoints in decentralised trials
Digital healthGut testing behind your app
ResearchersConsistent, ambient-stable stool input

Good to know.

What is OMNIgene·GUT used for?

Stool, stabilised at the point of collection, for 16S rRNA microbiome profiling, shotgun metagenomic sequencing, qPCR and arrays, per the maker: microbiome and gastrointestinal work, from the home or the point of care.

Does it need cold chain?

No. Per the manufacturer, the stabilising liquid fixes the microbial DNA at collection, so the sample ships at room temperature by standard tracked return, within the maker’s 60-day window.

How does the stabilisation work?

Closing the tube and shaking it mixes the stool with a stabilising liquid that fixes the microbial DNA and preserves the community profile for ambient transport, so the sample reaches the laboratory without the degradation a raw sample would suffer in the post.

How long is the sample stable at room temperature?

60 days by the maker’s figure, with DNA integrity maintained through ambient swings from −20 °C to 50 °C.

Is OMNIgene·GUT CE marked?

Yes. OMNIgene·GUT has carried a CE-IVD mark in Europe since the maker’s 2015 announcement and is research use only in the United States. Device-level regulatory status is held by DNA Genotek; each assay is validated in an ISO 15189-accredited laboratory before a patient-facing result.

How much stool does it collect?

A median 520 mg per the maker, yielding around 12 µg of DNA per extraction, with eight extractions to a kit.

Does it stabilise RNA as well?

No. OMNIgene·GUT stabilises DNA; the maker’s DNA-and-RNA kit is a separate product that is not on the platform.

Who is the manufacturer?

DNA Genotek makes the device. Humans Nexus curates and supplies it on the platform and assembles the clinical-grade kit around it. Method validation runs per assay before patient-facing reporting.

OpenSampling Library by Humans Nexus

The research library.

  1. Detection of Cryptosporidium hominis by clinical metagenomics in stool samples from an outbreak of diarrhoea among British military personnel in Kenya

    BMJ military health · 2026 · Paywalled

    A study limited by sample size found OMNIgene GUT tubes preserved Cryptosporidium DNA better than DNA Shield and FTA cards after year-long ambient storage. qPCR detected DNA in 23/24 OMNIgene, 21/24 DNA Shield, and 17/20 FTA samples, while metagenomics

    Read in the Library
  2. Perioperative Antibiotic Prophylaxis in Cesarean Section and the Maternal Gut Microbiome: Protocol for a Remote Observational Cohort Study

    JMIR research protocols · 2026 · Open access

    The study demonstrated the feasibility of a fully decentralised design by successfully recruiting 37 participants and completing follow-up for

    Read in the Library
  3. Prospective evaluation of different faecal preservation media for travellers' diarrhoea diagnostic application with multiplex PCR BioFire FilmArray in resource-limited settings

    Journal of medical microbiology · 2025 · Open access

    In a field cohort of 60 adults with diarrhoea, OMNIgene 200 and DNA/RNA shield maintained high sensitivity and concordance with fresh samples for most pathogens, while FTA cards showed low sensitivity for STEC and poor specificity for Campylobacter. This supports the use of stabilised stool media for

    Read in the Library
  4. Stabilized and unstabilized sampling methods result in differential fecal 16S rRNA microbial sequencing results

    PloS one · 2025 · Open access

    Taxonomic and diversity profiles differed between unstabilised swabs and stabilised OmniGene kits, with transport time disproportionately affecting swab samples; the collection method had a greater impact on taxa and

    Read in the Library
  5. Association of Gut Dysbiosis with Disease Phenotype and Treatment in Systemic Lupus Erythematosus

    Medical sciences · 2025 · Open access

    The study found significant gut microbiota alterations in systemic lupus erythematosus patients, with different beta diversity, p=0.001, and shifts in phyla abundance compared to controls. Specific microbial profiles were associated with clinical subgroups, though the

    Read in the Library
  6. Field expedient stool collection methods for gut microbiome analysis in deployed military environments

    mSphere · 2025 · Open access

    This study compared OMNIgene Gut tubes and FTA cards for stool collection in a deployed setting, finding that OMNIgene yielded higher nucleic acid concentrations while both methods detected the majority of microbial genera. The authors conclude that distinct microbial abundance profiles between

    Read in the Library

All 37 in the OpenSampling Library

These citations describe the published evidence for the collection formats and devices, not claims about specific Humans Nexus assays, which are validated per analyte and per laboratory.

Put stabilised stool on your platform.

Talk to us about OMNIgene·GUT for your programme.