Next-Generation Sequencing for UTI Diagnosis: What It Is and Why It Matters

If you've been dealing with recurrent, complicated, or culture-negative UTIs, you may have heard the term next-generation sequencing — or you may be wondering whether more advanced testing is available. NGS is a molecular technology that's changing UTI diagnosis, offering a more comprehensive view of what's happening in the urinary tract than traditional urine culture.

What is next-generation sequencing?

NGS is a laboratory technology that reads the DNA in a biological sample. Unlike traditional tests that look for specific, known targets, NGS can identify the DNA of virtually any organism — common bacterium, unusual pathogen, fungus, or virus.

The process makes millions of copies of the DNA in a sample, then determines the sequence of the genetic code. That data is compared against large databases of known pathogen genomes. The result: a comprehensive molecular inventory of what's in the sample.

How is NGS different from urine culture and PCR?

Urine culture

Tries to grow bacteria from a urine sample in the lab. Above a certain threshold, the test is positive. Takes 2–5 days. Works well for common UTI bacteria under ideal conditions, but misses infections caused by organisms that won't grow in standard culture, those at low concentrations, or those suppressed by recent antibiotics.

PCR (Polymerase Chain Reaction)

Looks for specific DNA fragments associated with pre-selected pathogens. Faster and more sensitive than culture for the targets it tests for — but if the organism causing your UTI isn't on the panel, it's missed.

Next-generation sequencing

Doesn't require pre-selecting targets or growing bacteria. Sequences all DNA in the sample and identifies every organism present, regardless of whether it was expected. This makes it uniquely powerful for atypical, fastidious, or unexpected pathogens, and for showing the full picture of polymicrobial infections.

What can NGS tell clinicians that other tests cannot?

Detection of a broader range of pathogens

NGS identifies organisms across the full spectrum of urogenital pathogens — including hard-to-grow bacteria, fungi, and certain viruses. Fastidious organisms like Ureaplasma parvum, Mycoplasma species, and anaerobic bacteria — frequently missed by culture — can be detected through NGS.

Antibiotic resistance marker identification

NGS-based tests can identify genetic sequences that confer resistance to specific antibiotics. This lets clinicians avoid prescribing drugs that won't work and choose ones the bacteria is still sensitive to. Particularly valuable for patients with prior antibiotic exposure.

Faster turnaround

Some NGS-based UTI tests return results in 12–24 hours — faster than the 2–5 days for traditional culture.

Detection of polymicrobial infections

Standard culture often reports only the dominant organism or flags mixed samples as contaminated. NGS can characterize multiple organisms at once.

What is the BIOTIA‑ID Urine Test?

Biotia's NGS-based diagnostic test is directly available to patients with recurrent, complicated, or culture-negative UTIs. The BIOTIA-ID Urine Test identifies 40+ urogenital pathogens — including organisms commonly missed by standard culture or excluded from PCR panels — and provides detailed antibiotic resistance marker information to enable precision treatment.

What are the limitations of NGS?

Because NGS detects the DNA of all organisms in a sample, it can sometimes flag pathogens that are present but not actually causing the current infection — careful clinical interpretation matters. The BIOTIA-ID Urine Test report has been curated to focus on key urogenital pathogens, simplifying interpretation while avoiding overdiagnosis.

NGS is also a newer technology, and insurance coverage is still catching up with its clinical utility. Costs may not yet be covered by all plans, though this is expected to change.

The bottom line

NGS represents a meaningful advance in UTI diagnosis, particularly for patients whose infections are complex, recurrent, or unresponsive to standard treatment. By reading the genetic material in a urine sample — instead of trying to grow bacteria — NGS identifies a broader range of pathogens, detects resistance markers, and returns results faster.