[Diagnosis of infections in pneumology].

Lower respiratory tract infections play an important role in the ambulatory and hospital health-care sectors. State-of-the-art diagnoses of lower respiratory tract infections and methods to differentiate bacterial lower respiratory tract infections from colonisation have been described in the first two parts of this review series. The present article summarises current diagnostic methods and treatment indications for viral and fungal respiratory infections. These recommendations may guide clinicians in their decision to prescribe or withhold antibiotic therapies in daily clinical practice.