Testing tafenoquine to prevent babesiosis from tick bites

Evaluation of tafenoquine for prophylaxis of babesiosis caused by Babesia microti

NIH-funded research Tufts Medical Center · NIH-10791897

This study is looking at whether tafenoquine, a medicine used to prevent malaria, can help older adults and people with weakened immune systems avoid getting babesiosis, a tick-borne illness caused by a parasite.

Quick facts

Grant typeR03 grant
Study typeNIH-funded research
Funding institutionTufts Medical Center NIH-funded
Lab location1 site (Boston, United States)
Project IDNIH-10791897 on NIH RePORTER

What this research studies

This research investigates the use of tafenoquine, a medication previously approved for malaria prevention, to see if it can effectively prevent babesiosis caused by the Babesia microti parasite. The study focuses on older adults and immunocompromised individuals who are at higher risk for severe symptoms from this tick-borne disease. Participants will receive a specific dosing regimen of tafenoquine to evaluate its effectiveness in preventing infection. The research aims to fill a gap in current prophylactic options for babesiosis, as no vaccine or chemoprophylaxis has been tested for this condition.

Who could benefit from this research

Good fit: Ideal candidates for this research are older adults over 50 years of age and immunocompromised individuals who are at higher risk for severe babesiosis.

Not a fit: Patients who are young and healthy, as they typically experience mild symptoms and may not require prophylaxis for babesiosis.

Why it matters

Potential benefit: If successful, this research could provide a new preventive treatment option for individuals at risk of developing severe babesiosis.

How similar studies have performed: While tafenoquine has been successfully used for malaria prevention, this specific application for babesiosis is novel and has not been previously tested.

Where this research is happening

Boston, United States

Researchers

About this research

  1. This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
  2. Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
  3. For full project details, budget, and progress reports, visit the official NIH RePORTER page below.
Conditions Babesia infectionBabesia parasite infection
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.