Johne's Cow CR

Question 1

What are the routes of transmission of Johne’s on farms?

Answer 1

Faces
Milk/udder/colostrum
Placenta

Question 2

What are the key characteristics of avium subspecies paratuberculosis (=> Johne’s disease)

Answer 2

Slow growing, long incubation period - shed before displaying clinical signs
Acid-fast

Question 3

What are possible mehtods of preventing transmission of Johne’s disease on a dairy farm?

Answer 3

Good sanitation and management
Elimination of infected animals
Birth calves in area free of faeces
Pasteurise colostrum
Vaccination of young calves