| Stains and cultures of bronchial washings were negative for Pneumocystis, acid-fast bacilli, fungi, bacteria, and viruses. |
| Special stains were negative for acid-fast bacilli, fungal forms, Pneumocystis, and other bacteria. |
| Special stains for fungus and acid-fast bacteria are negative, although culture is the more definitive diagnostic test. |
| The acid-fast bacteria are particularly rich in fatty substances, especially the higher wax-like fats. |
| Other bacteria than the acid-fast group are stained blue by Gabbet's method. |
| This method is supposed to differentiate between B. tuberculosis and other acid-fast micro-organisms. |
