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Surveillance Focus
Ovine Johne’s disease diagnoses in Scotland, 2005–2019

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Ovine Johne’s disease is a granulomatous enteritis caused by infiltration of the intestinal tract with Mycobacterium avium subspecies paratuberculosis (MAP).

SRUC VS recorded 837 diagnoses of Johne’s disease in sheep between 2005 and 2019, with wasting being the most common presenting sign. The condition was confirmed in 37 different breeds plus eight crosses.

The number of diagnoses fluctuates throughout the year with few in the summer months. Peaks in February and September are associated with the investigation …

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