Ovine Progressive Pneumonia

Reid Redden, Sheep Specialist

Rick Schmidt, Oliver County Extension

OPP

OPP

Slides courtesy of Leymaster (MARC)

Slides courtesy of Leymaster (MARC)

Slides courtesy of Leymaster (MARC)

Slides courtesy of Leymaster (MARC)

Slides courtesy of Leymaster (MARC)

Slides courtesy of Leymaster (MARC)

OPP Grant

• Farmer/Rancher Grant from NCR-SARE– Test 12 different farms

• 50 Animals, preferably oldest• Serology and Haplotype

– 733 samples– 8 Breeds ( > 2 flocks per breed)

• Columbia, Dorset, Hampshire, Katahdin, Montadale, Polypay, Rambouillet, Suffolk

Results

Results

• Flock Infection Rate– 66% (8 of 12)

• Range of Infection Status– 0 to 76%

• Infected Rate– 28%

Results

• Severity of Infection Rate• 0% 4 flocks• 0-10% 3 flocks• 10-25% 3 flocks• >25% 2 flocks

Results

• Breeds– Columbia – 48% positive (n = 48)– Dorset – 48% positive (n = 125)– Hampshire – 57% positive (n = 50)– Katahdin – 26% positive (n = 92)– Montadale – 0% positive (n = 15)– Polypay – 42% positive (n = 83)– Rambouillet – 10% positive (n = 207)– Suffolk – 15% positive (n = 90)

Results

• Age– 1 23% (n = 133)– 2 27% (n = 144)– 3 33% (n = 150)– 4 27% (n = 78)– 5 38% (n = 73)– 6 21% (n = 74)– 7 41% (n = 37)– 8 30% (n = 27)

Results

• TMEM 154– 1,1 23% positive (n = 501)– 1,2 43% positive (n = 84)– 1,3 38% positive (n = 60)– 1,4 49% positive (n = 47)– 2,2 66% positive (n = 3)– 2,3 25% positive (n = 4)– 2,4 60% positive (n = 15)– 3,3 0% positive (n = 5)– 3,4 0% positive (n = 1)– 4,4 50% positive (n = 4)

Results

• TMEM 154 (infected flocks only)– 1,1 31% positive (n = 378)– 1,2 55% positive (n = 65)– 1,3 58% positive (n = 40)– 1,4 53% positive (n = 43)– 2,2 66% positive (n = 3)– 2,3 50% positive (n = 2)– 2,4 64% positive (n = 14)– 3,4 0% positive (n = 1)– 4,4 50% positive (n = 4)

ResultsColumbia (n = 46)

• 1 0.99• 4 0.01

Dorset (n = 125)• 1 0.88• 2 0.10• 3 0.02

Hampshire (n = 50)• 1 0.53• 2 0.16• 4 0.31

Katahdin – (n = 92)• 1 0.59• 2 0.13• 3 0.17• 4 0.09• 9 0.02

Montadale (n = 15)• 1 0.97• 3 0.03

Polypay (n = 83)• 1 0.86• 2 0.04• 3 0.08• 4 0.02

Rambouillet – (n = 207)• 1 0.92• 2 0.01• 3 0.06• 4 0.002• 10 0.01

Suffolk – (n = 90)• 1 0.76• 2 0.16• 3 0.01• 4 0.08

Implications

• OPP is common in ND flocks– Only problematic in a few flocks– New knowledge of transmission

• TMEM 154– Appears to provide some protection– Breed differences

• ND flocks should have an OPP flock plan