Elderly female of 75 years old known case of diabetes and rheumatoid arthritis for 20 years. Has been vaccinated (PCV-13) few years back. Still gets respiratory tract infections culture sensitivity. Should go hand in hand, in case of culture cant be done.

What should be the best antibiotic policy? One antibiotic or two, which is the best? How frequently we should evaluate for evidence of fungal infection? Also, how long antibiotics should be given?