Chlamydia pneumoniae infection cases have usually accounted for <1.5% of community-acquired respiratory tract infections. Currently, Lausanne, Switzerland is experiencing a notable upsurge in cases, with 28 reported within a span of a few months. This upsurge in cases highlights the need for heightened awareness among clinicians.
Keywords: Chlamydia pneumoniae; Switzerland; asthma; bacteria; community-acquired pneumonia; intracellular bacteria; outbreak; pneumonia; respiratory infections.