Hello, greetings! Thanks for your query. As you have stated, certainly Burkholderia cepacia complex (BCC) infection is hard to eradicate as this bacteria is highly resistant to the conventional antibiotics. The Antibiotcs have to be used extremely cautiously. The most effective drug is bactrim, but it isn t used routinely used as it is has severe side efffects. I would recommend my patients a class of drug called tetracyclines but as this is a prescription drug, it will be available on the basis of a prescription from your local doctor and he can udjust the dose by measuring your body statistics. Your concern for passing phlegm may be pointing towards a respiratory tract infection, if you have been phlegm and mucus for more than 2 weeks, I suggest you get it tested for the possibility of Tuberculosuis.