Paediatric pulmonary disease-are we diagnosing it right?

Area of Science:

• Pediatric infectious diseases
• Microbiology
• Molecular diagnostics

Background:

• Differential diagnosis of bacterial/viral pneumonia and tuberculosis (TB) in children is complex due to difficulties in microbiological confirmation.
• Pediatric pulmonary TB diagnosis requires improved methods for accurate identification of causative pathogens.

Purpose of the Study:

• To evaluate the effectiveness of a real-time multiplex PCR assay for diagnosing respiratory pathogens in children with pulmonary TB.
• To assess the utility of multiplex PCR in differentiating TB from other common respiratory infections in pediatric patients.

Main Methods:

• 185 respiratory samples from children aged 3-12 years were analyzed.
• Samples underwent N-acetyl L-cysteine (NALC) NaOH treatment for Mycobacterium tuberculosis (MTB) detection via smear microscopy, Xpert® MTB/RIF, and liquid culture.
• Multiplex real-time PCR was performed on processed sputum for bacterial and fungal pathogens.

Main Results:

• 20 out of 185 samples were positive for MTB.
• Of the MTB-positive samples, 15 also showed co-infection with bacterial or fungal pathogens.
• 145 (87%) of MTB-negative samples were positive for other bacterial or fungal pathogens.

Conclusions:

• Tuberculosis can coexist with other respiratory pathogens in children.
• Simultaneous detection methods like multiplex PCR are valuable for diagnosing pediatric TB and pneumonia.
• Large-scale, multi-geographical studies are needed to confirm the utility of these rapid diagnostic tests.