Good morning all, My husband just had a sputum test and once again the results are pseudomonous aeruginosa. This time it is +3. Does anyone know the difference between +1, +2 and +3 pseudomonous? My husband also has MAC but is currently not taking anything because the big 3 caused him to lose quite a bit of weight and get very run down. We see the Infectious Disease and the Pulmonologist doctors next week.