Pulmonary tuberculosis in children in a developing country

Area of Science:

• Pediatrics
• Infectious Diseases
• Public Health

Background:

• Pulmonary tuberculosis (PTB) diagnosis in children presents unique challenges, particularly in developing countries.
• Clinical presentations of pediatric PTB can vary significantly based on geographic location and socioeconomic factors.

Purpose of the Study:

• To identify clinical and epidemiologic features predictive of confirmed pulmonary tuberculosis (PTB) in Peruvian children.
• To compare diagnostic criteria for pediatric PTB in a hyperendemic setting with those used in developed nations.

Main Methods:

• A cross-sectional study involving 135 children with presumptive PTB in Lima, Peru.
• Comparison of clinical, epidemiologic, and laboratory findings among children with definitive PTB (positive culture), probable PTB (clinical criteria), and non-PTB.

Main Results:

• Fifty children (37%) had definitive PTB via positive sputum culture; 55 (47%) had probable PTB based on clinical criteria.
• Children with PTB were older and more likely to present with prolonged cough, fever, and a positive purified protein derivative (PPD) skin test (> /=10 mm).
• The triad of cough lasting >/=2 weeks, fever, and PPD >/=10 mm was highly predictive of culture-positive PTB.

Conclusions:

• Pediatric PTB in Peru often presents with active pulmonary disease symptoms, similar to adults, contrasting with milder presentations in developed countries.
• Diagnostic criteria for pediatric PTB require adaptation for hyperendemic developing country contexts.
• The identified symptom triad offers a valuable predictive tool for diagnosing PTB in resource-limited settings.