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Related Experiment Video

Updated: Jun 20, 2026

Clinical Examination Protocol to Detect Atypical and Classical Scrapie in Sheep

Clinical Examination Protocol to Detect Atypical and Classical Scrapie in Sheep

Published on: January 19, 2014

Mapping risk foci for endemic sheep scab.

H Rose¹, J Learmount, M Taylor

¹Veterinary Parasitology & Ecology Group, School of Biological Sciences, University of Bristol, Woodland Road, Clifton, Bristol, United Kingdom. hannah.rose@bristol.ac.uk

Veterinary Parasitology

|August 29, 2009

Summary

Sheep scab, caused by Psoroptes ovis mites, is a growing concern. Identifying high-risk areas using farmer surveys and environmental data can help target control efforts and reduce national prevalence.

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Last Updated: Jun 20, 2026

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Area of Science:

Veterinary Parasitology
Epidemiology
Agricultural Science

Background:

Psoroptic mange (sheep scab) caused by Psoroptes ovis is a significant and increasing issue in sheep farming across Europe.
Effective national control strategies are needed, with regional programs targeting high-risk areas being a potential initial approach.

Purpose of the Study:

To identify sheep scab outbreak farms through a farmer questionnaire survey.
To develop a national scab risk model for Great Britain to aid targeted control.

Main Methods:

A questionnaire survey of sheep farmers was conducted to identify scab outbreak farms.
Data were used to build a national scab risk model, analyzing prevalence and risk factors.
Statistical analysis (chi-squared test) was used to assess the impact of previous exposure.

Main Results:

National scab prevalence was 8.6% between March 2007 and February 2008.
Previous scab outbreaks significantly increased the probability of reporting new outbreaks (P<0.001).
High-prevalence areas included Northern England, Wales, Southwest England, and Scotland; environmental factors like altitude, temperature, and rainfall were significant predictors.

Conclusions:

Targeted scab management programs in identified high-risk foci can improve control efficiency.
A focused approach has the potential to significantly reduce sheep scab prevalence in the UK and Europe.