@formergardener good morning . I have Pseudomonas in my left maxillary sinus determined by a culture showing Pseudomonas colonized which means it’s resting there no active infection now ( have been several) ….and in my lungs determined by a sputum . The notion is the bacteria dripped down through my nose into my lungs due to the connection of the respiratory system . My Pulmonologist is dealing with the lungs ..I’m 85 years old and having maxillary Antrostomy surgery on Wednesday under General Anesthesia. The sinus needs to be opened more for better drainage .and dried pus and hopefully bacteria cleaned out . The ENT Dr feels he can eradicate the Pseudomonas …it’s long overdue and the ENT Dr says he needs to do more than what he can do in his office thus the surgery. All the best to all those dealing with this bacteria and how in the world did we catch it ??