Study summary
Complete Protection Time of a 30% Citriodiol (oil of lemon eucalyptus) repellent against three species of ticks (ARCTEC trial, NCT03708120)
ARCTEC (London) for Citrefine International
- Study type
- Rct
- Year
- 2019
- Published in
- ClinicalTrials.gov NCT03708120 (sponsor-reported; not peer-reviewed)
- Evidence strength
- Limited evidence
Summary
Human-subject complete-protection-time trial of a 30% Citriodiol (OLE/PMD) spray against three tick species, using the EPA first-confirmed-crossing endpoint. The only proper skin-CPT tick study for OLE, but its figures are sponsor-reported.
Key findings
Sponsor-reported mean complete protection: about 4.8 h against the deer tick (Ixodes scapularis), more than 8.8 h against the brown dog tick (Rhipicephalus sanguineus), and more than 10 h against the lone star tick (Amblyomma americanum). The deer tick is consistently the hardest species.
Limitations
Manufacturer-sponsored; figures come from press releases and the EPA submission, not a peer-reviewed paper, and no results are posted on the trial registry. Treat as label-supporting, not independent data.