1. Introduction Community-acquired pneumonia (CAP) is a highly contagious disease that poses a serious threat to human health [1]. Respiratory tract infections caused by respiratory pathogens are the main cause of CAP. Among them, Mycoplasma pneumoniae (Mp), Chlamydia pneumoniae (Cp), Haemophilus influenzae (Hi), and Streptococcus pneumoniae (SP) are the main pathogens causing CAP [1], with Mp accounting for approximately 40% of CAP infections [2].