Effect of the inoculation site of bovine purified protein derivative (PPD) on the skin fold thickness increase in cattle from officially tuberculosis free and tuberculosis-infected herds

1. Casal, C.
2. Alvarez, J.
3. Bezos, J.
4. Quick, H.
5. Díez-Guerrier, A.
6. Romero, B.
7. Saez, J.L.
8. Liandris, E.
9. Navarro, A.
10. Perez, A.
11. Domínguez, L.
12. de Juan, L.D.