Detection of respiratory viral and bacterial pathogens causing pediatric community-acquired pneumonia in Beijing...

Area of Science:

• Pediatric infectious diseases
• Respiratory medicine
• Molecular diagnostics

Background:

• Community-acquired pneumonia (CAP) is a common infection in children.
• Determining the specific etiological agents of pediatric CAP is crucial for effective treatment and prevention strategies.
• Real-time polymerase chain reaction (PCR) offers a sensitive method for pathogen detection.

Purpose of the Study:

• To investigate the causes and prevalence of pediatric CAP in Beijing.
• To utilize multiplex real-time PCR for identifying viral and bacterial pathogens.
• To understand the etiological landscape of CAP in different pediatric age groups.

Main Methods:

• A cohort of 371 pediatric patients with CAP was enrolled at Beijing Children's Hospital.
• Tracheal aspirate specimens were analyzed using commercially available multiplex real-time reverse transcription PCR (RT-PCR) kits.
• Detection of 16 respiratory viruses and 2 bacteria was performed.

Main Results:

• Viral pathogens were identified in a significant proportion of cases (single virus: 35.3%; multiple viruses: 11.6%).
• Virus/bacteria coinfection occurred in 17.8% of patients, while bacterial pathogens were less common (single: 6.5%; multiple: 2.2%).
• Respiratory syncytial virus (RSV) was the most frequent virus, followed by rhinovirus, parainfluenza virus, and adenovirus. Streptococcus pneumoniae and Haemophilus influenzae were key bacterial contributors, particularly in younger children.

Conclusions:

• Viral infections, especially RSV, are the primary drivers of pediatric CAP in Beijing.
• Streptococcus pneumoniae and Haemophilus influenzae are significant bacterial causes of pediatric CAP.
• Multiplex real-time PCR is an effective tool for rapid etiological diagnosis of pediatric CAP.