Resurgence of Mycoplasma pneumoniae in Coastal China Following the Pandemic: Transition from Seasonal Outbreaks to Continuous Transmission and Broadened Age Vulnerability

By
Jinwei Zhu
Suqing Wu
Tianfu Xu
Bijuan Zheng
Yan Chen
Yushan Zhuang
February 7, 2026
0 min

Bmc Infectious Diseases

Overview

Following the COVID-19 pandemic, Mycoplasma pneumoniae (MP) has resurged in the subtropical coastal city of Putian, China, shifting from seasonal outbreaks to continuous year-round transmission. This resurgence is accompanied by expanded age susceptibility among pediatric patients and altered epidemiological patterns.

Background

Mycoplasma pneumoniae is a leading cause of pediatric acute respiratory infections (ARIs) globally, with distinct seasonal peaks varying by region in China. The southeastern coastal region, characterized by a subtropical climate, has lacked detailed epidemiological data on MP transmission. Understanding MP dynamics in this unique environment is critical, especially as the post-pandemic era shows shifts in seasonality and age-specific vulnerability. This study addresses these gaps through a two-year surveillance of over 10,000 pediatric ARI cases in Putian.

Data Highlights

Parameter	Value
Study Period	Dec 2022 - Nov 2024
Number of Pediatric ARI Patients	10,193
Age Range	0-14 years
Location	Putian, Fujian, China
Pathogen Detection Method	Multiplex RT-PCR with capillary electrophoresis

Key Findings

MP transmission in Putian has transitioned from distinct seasonal outbreaks to continuous year-round circulation.
Broadened age vulnerability observed, with increased MP infection rates beyond traditional pediatric age groups.
Unique subtropical climate factors, including prolonged warmth and humidity, may contribute to altered MP epidemiology.
Multiplex RT-PCR enabled simultaneous detection of 13 respiratory pathogens, confirming MP as a predominant agent in pediatric ARIs.
Post-pandemic epidemiological patterns differ significantly from pre-pandemic data, indicating fundamental shifts in MP dynamics.

Clinical Implications

Clinicians should be aware of the continuous risk of MP infection throughout the year in subtropical coastal regions, rather than expecting seasonal peaks. Expanded age susceptibility necessitates vigilance across a broader pediatric age spectrum. Diagnostic protocols incorporating multiplex RT-PCR can aid timely identification and management of MP in pediatric ARIs.

Conclusion

This study establishes a new epidemiological benchmark for MP in subtropical coastal China, highlighting continuous transmission and expanded age risk post-pandemic. These findings inform targeted public health strategies and clinical management to mitigate the evolving MP threat.

References

Global and Regional Studies on MP Epidemiology (2020-2023) -- Post-pandemic Resurgence and Patterns
WHO Guidelines on Acute Respiratory Infections (2021) -- Clinical Definitions and Management
National Health Commission of China (2022) -- Technical Guidelines for Pharyngeal Swab Collection