Scientists use clean ticks to sniff out hidden lyme infection

NCT ID NCT01143558

First seen Nov 01, 2025 · Last updated Jun 24, 2026 · Updated 31 times

Summary

This study tested whether clean, lab-bred ticks could find leftover Lyme bacteria in people who had been treated with antibiotics. 45 participants, including those with recent or past Lyme disease and healthy volunteers, had ticks placed on their skin for a few days. The goal was to see if this method, called xenodiagnosis, is safe and can detect bacteria that standard tests miss, helping explain why some people continue to have symptoms after treatment.

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Contacts and locations

Locations

  • National Institutes of Health Clinical Center

    Bethesda, Maryland, 20892, United States

  • Tufts University

    Boston, Massachusetts, 01536, United States

  • Yale University

    New Haven, Connecticut, 06510-8005, United States

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance

Xenodiagnosis using clean laboratory-bred ticks

What this could lead to

If successful, this method could help detect lingering Lyme bacteria, guiding better treatment for patients with persistent symptoms.

What could go wrong

This is a very early, small study focused on testing a diagnostic method, not a treatment. It may not prove useful or safe for widespread use.

Conditions

The condition(s) this trial relates to.

Lyme disease

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.