Is it unusual for an 18 year old to have a pseudomonas throat culture. He has been on 2 different antibiotics. Finally the last culture grew out pseudomonas. Could this mean he is immune suppressed. Initially had flu symptoms, sinusitis and fever but that got better after 3 to4 days. Just sore throat continues for 2 weeks. Finally they called with the culture and put him on Cipro for 10 days. He is a normal 18 yo that plays sports and is very active. Should I be over concerned. Leukemia runs in my husbands family and I always get paranoid about my children when they have something unusual.