Clinical trial Recruiting at 2 sites Phase2; Phase3 Interventional Ages 18 and up

Treatment for murine and scrub typhus infections

Official title: A Pharmacokinetic-pharmacodynamic Study of Early Rickettsia Clearance in Murine Typhus or Scrub Typhus Patients Treated With Doxycycline or Azithromycin

Run by Lao-Oxford-Mahosot Hospital Wellcome Trust Research Unit · NCT05972772 · Data updated 2026-11-12

This study is testing if the antibiotics doxycycline and azithromycin can effectively treat adults with murine and scrub typhus infections while they are hospitalized.

Quick facts

PhasePhase2; Phase3
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment72 (estimated)
SponsorLao-Oxford-Mahosot Hospital Wellcome Trust Research Unit
Academic / other
Locations2 sites (Vientiane, Vientaine and 1 other locations)
StatusRecruiting
StartedNovember 1, 2024
Main results expectedDecember 31, 2027
Study endsDecember 31, 2027
Registry record updatedOctober 13, 2026
Trial IDNCT05972772 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are adults aged 18 and older who have tested positive for murine typhus or scrub typhus and can take oral medication.

Probably not a fit

Patients who are pregnant, breastfeeding, or have severe forms of typhus or contraindications to the study medications will not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial focuses on evaluating the effectiveness of doxycycline and azithromycin in treating murine typhus and scrub typhus, two infectious diseases caused by rickettsial bacteria. Participants will be adults who test positive for these infections and agree to stay in the hospital for at least 36 hours for treatment and follow-up. The study aims to improve diagnosis and treatment options for these diseases, which have significant mortality rates if left untreated. The trial is conducted at the Lao-Oxford-Mahosot Hospital and Vientiane Provincial Hospital in Laos.

Why it matters

Potential benefit: If successful, this study could lead to improved treatment protocols for murine and scrub typhus, potentially reducing mortality rates associated with these infections.

How similar studies have gone: Other studies have shown varying success with similar antibiotic treatments for rickettsial infections, but this specific approach is being evaluated in a novel context.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age above or equal 18 years
* Able to take oral medication
* Rapid test positive for murine typhus or scrub typhus
* Agrees to stay in hospital for at least 36 hours and to attend for scheduled follow up visits
* Written informed consent to participate in the study
* A negative urinary pregnancy test for all women of child-bearing age

Exclusion Criteria:

* Pregnancy or breast feeding
* Previous allergic reaction to doxycycline or azithromycin
* Received more than one dose of chloramphenicol, doxycycline, tetracycline, fluoroquinolones, rifampicin or azithromycin during this hospital admission or more than one dose of any of these drugs in the week before admission
* Contraindication to doxycycline: severe hepatic impairment, known SLE
* Contraindication to azithromycin: sever hepatic impairment
* Severe typhus defined as the presence of one or more of the following:

  1. Reduced level of consciousness
  2. Clinical jaundice
  3. Shock (BP systolic \<80 mmHg)
  4. Unable to take oral medication
  5. Radiological evidence of pneumonia
  6. Clinical evidence for meningitis/encephalitis or the need of LP
  7. Alternative diagnosis confirmed that explains the presenting symptoms
  8. Any other syndrome which in the opinion of the admitting doctor constitutes severe typhus (reason must be stated)

Where it's running

  • Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU)
    Vientiane, Vientaine, Laos
    Recruiting
  • Vientiane Provincial Hospital
    Muang Phon-Hong, Vientiane Province, Laos
    Recruiting

Study contacts

  • Principal investigator: Weerawat Phuklia, PhD — Lao-Oxford-Mahosot Hospital Wellcome Trust Research Unit
  • Study coordinator: Weerawat Phuklia, PhD
  • Email: weerawat@tropmedres.ac
  • Phone: +8562056581365

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.