Experimental infection of cattle with Mycobacterium tuberculosis isolates shows the attenuation of the human tubercle bacillus for cattle by Villarreal-Ramos, B, Berg, S, Whelan, A, Holbert, S, Carreras, F, Salguero, F, Khatri, B, Malone, K, Rue-Albrecht, K, Shaughnessy, R, Smyth, A, Ameni, G, Aseffa, A, Sarradin, P, Winter, N, Vordermeier, M, Gordon, S