| Acid-fast bacilli were numerous, both intracellularly in histiocytes and extracellularly in necrotic areas. |
| The role of macrophage apoptosis in containing the growth of the bacilli is also discussed. |
| All the patients had bacilli sensitive to streptomycin, isoniazid and rifampicin initially. |
| The elongation phase of growth distinguishes bacilli from cocci, which grow and divide by pure septation. |
| Tubercle bacilli can remain dormant for years before producing active disease. |
| Stains and cultures of bronchial washings were negative for Pneumocystis, acid-fast bacilli, fungi, bacteria, and viruses. |
