I suffer from Specific Polysacchride Antibody Deficency and Common Variable Immune Deficency. I take weekly subcutaneous infustions to bolster my immune system . I have not been an antibiotic in four years, both to treat infections and for profolactic reasons. Cultures have shown psydeumonisis, Strep , and Staph. I have NO immunity to Staph and Strep. While in MX last week on vacation I spat out a large mucous ball that was greyish in color with black striations (sp) throughout it. It is not the first time I ve seen this and have consistently reported this to my ENT. I am currentlty on 750 mg Cipro daily for profolactic reasons.
Hi, being someone with feeble immunity, you are liable for bacterial and fungal infections. The ball you spat could be fungal! Get yourself tested for any fungal hype in sputum, and if positive, you need prophylactic antifungals.  Prevention is always better than cure and treating fungal infections in an immune compromised patient is a difficult task. You may request your doctor for this. All the best.