Fluorescent acid-fast microscopy for measuring phagocytosis of Mycobacterium avium, Mycobacterium intracellulare, and Mycobacterium scrofulaceum by Tetrahymena pyriformis and their intracellular growth - Strahl, E D; Gillaspy, G E; Falkinham, J O, III (Appl Environ Microbiol, 2001)