| Acid-fast bacilli were numerous, both intracellularly in histiocytes and extracellularly in necrotic areas. |
| Results of a Mantoux test and sputum test for acid-fast bacilli were negative. |
| Special stains were negative for acid-fast bacilli, fungal forms, Pneumocystis, and other bacteria. |
| Cultures of right and left lung tissues were obtained for bacteria, acid-fast bacilli, and fungi. |
| The elongation phase of growth distinguishes bacilli from cocci, which grow and divide by pure septation. |
| Stains and cultures of bronchial washings were negative for Pneumocystis, acid-fast bacilli, fungi, bacteria, and viruses. |
