Essential oils in the management of the donkey louse, Bovicola ocellatus

Status
Status: 
Completed
Applicants
Collaborators
Researchers
Award types
Donkey Sanctuary awards: 
Clinical research
Details
Country: 
United Kingdom
Core methodology: 
In vivo field trial. Suspensions of 5% (v/v) tea tree or lavender oil or an excipient only control were groomed into the coats of winter-housed donkeys (n = 198) on 2 occasions, 2 weeks apart. Louse counts were conducted before each application and 2 weeks later.
Objectives: 
To assess the effects of incorporating the essential oils of tea tree and lavender into a grooming programme for populations of donkeys with natural infestations of Bovicola ocellatus in the UK and Ireland when louse populations were at their winter seasonal peak.
Results: 
After 2 applications, the groups groomed with lavender or tea tree oil suspensions had a significant reduction in louse intensity, with a mean decline in louse abundance of 78% (95% confidence interval 76–80%). Louse numbers in the groups groomed with excipient only either did not change or increased significantly. Donkey hair length had no effect on the decline in louse numbers.
Conclusions: 

These results demonstrate that the inclusion of essential oil suspensions during grooming can be used to manage louse populations successfully.