A simple pump-assisted method for collecting live, undamaged Psoroptes ovis from sheep using circulating saline

Area of Science:

• Veterinary Parasitology
• Animal Health
• Sheep Farming

Background:

• Sheep scab, caused by Psoroptes ovis mites, poses significant challenges in livestock management.
• Current methods for collecting P. ovis mites have limitations, hindering research and diagnostic efforts.
• Access to a sufficient quantity of undamaged mites is crucial for drug discovery and efficacy trials.

Purpose of the Study:

• To develop a simple, versatile, and efficient method for collecting live, undamaged sheep scab mites.
• To overcome the limitations of existing mite collection techniques.
• To provide a tool for improved diagnostics and the development of novel control strategies.

Main Methods:

• A novel method utilizing pumped saline was developed for mite removal from sheep.
• The procedure involves a quick application (under 2 minutes) to affected skin sites.
• The method's efficacy is independent of fleece condition or lesion severity.

Main Results:

• The pumped saline method successfully removed all life stages of P. ovis mites.
• This technique collected 5-10 times more mites compared to visual detection.
• Collected mites remained undamaged and viable for up to 16 days off-host.
• The equipment is portable, robust, and user-friendly for field applications.

Conclusions:

• The pumped saline method offers a highly effective means of obtaining large numbers of viable sheep scab mites.
• This technique is suitable for use as a diagnostic tool for early detection and monitoring of P. ovis infestations.
• The availability of mites via this method facilitates research into new control strategies and treatments for sheep scab.