Sheep scab warning on Shetland

Around a tenth of sheep imported to the isles recently have suffered from sheep scab – serving as a “wake-up call” to animal health staff.

Blood testing results indicate eight per cent of sheep entering Shetland have tested positive for sheep scab at the pier, while a further five per cent have tested as suspicious for the condition. The concerning results have been described as “much higher than expected” – and prompted a reminder for continued use of new dipping facilities at the marts, even if that does mean incurring a financial burden.

Animal health research officer Lyall Halcrow said dipping remained important to help maintain Shetland’s excellent animal health record. “This import season, blood testing results indicate that eight per cent of sheep have tested positive and five per cent have tested suspicious for sheep scab at the pier,” he said.

“The test demonstrates exposure to sheep scab and possible presence of sheep scab mites and infectivity.

“This proportion is much higher than expected, and shows it is important that everyone is especially mindful when importing sheep.”

He added: “We were expecting one per cent of sheep would test positive. It is a high figure. It is a wake-up call.”

Earlier this year, 10,000 potential contact sheep across Shetland were dipped following the first case of sheep scab in the isles since 1994.

Environmental health says this was most likely due to mites on an imported ram beingresistant to the injectable product used at the pier.

Mr Halcrow added: “Resistance and lack of efficacy reports for the injectable is on the rise in the UK and Scotland, and dipping is the only effective treatment against these resistant mites. In response, Shetland Livestock Marketing Group (SLMG) opened the new dipping facility for imported sheep in September.

Mr Halcrow said the “vast majority of importers” have been presenting their sheep this year.

But he warned against complacency and said it was important they continue to use the sheep-dip.

“Dipping is the only way we can ensure Shetland is kept free of sheep scab, so please ensure your sheep are either dipped on import, or discuss with your vet if you plan to have sheep dipped prior to importation.”

The blood test screening has been funded by Livestock Health Scotland and administered by the Shetland Animal Health Scheme and Shetland Vets.