1. Isolation of Mycobacterium paratuberculosis from colostrum and milk of subclinically infected cows;Streeter;Am J Vet Res,1995
2. Mycobacterium paratuberculosis cultured from milk and supramammary lymph nodes of infected asymptomatic cows;Sweeney;J Clin Microbiol,1992
3. Bovine fetal infection with Mycobacterium paratuberculosis;Seitz;J Am Vet Med Assoc,1989
4. Mycobacterium paratuberculosis isolated from fetuses of infected cows not manifesting signs of the disease;Sweeney;Am J Vet Res,1992
5. Age as a factor in susceptibility to Johne's disease;Hagan;Cornell Vet,1938