Tuberculosis (TB) is a chronic infectious disease caused by the bacterium Mycobacterium tuberculosis, primarily affecting the lungs (pulmonary TB) but can also involve other organs (extrapulmonary TB) such as lymph nodes, spine, brain, and kidneys.
TB spreads mainly through airborne droplets when an infected person coughs, sneezes, or speaks. Children are usually infected by contact with an adult TB case, especially in households.
๐ฉบ Identification / Diagnosis of TB in Children:
Diagnosing TB in children is challenging, as they often present with non-specific symptoms and less obvious sputum production.
๐ 1. Clinical History & Symptoms:
Persistent cough (>2 weeks)
Low-grade fever, often in the evening
Weight loss or failure to gain weight
Loss of appetite
Fatigue and irritability
Night sweats
History of TB contact in family or surroundings
A child with no weight gain or unexplained fever/cough lasting >2 weeks should be investigated for TB.
๐งช 2. Physical Examination:
Respiratory signs (e.g., wheezing, rales)
Enlarged lymph nodes
Spinal tenderness (in TB spine)
Meningeal signs (in TB meningitis)
๐งซ 3. Tuberculin Skin Test (Mantoux Test):
Intradermal injection of PPD (Purified Protein Derivative)
Induration (swelling) measured after 48โ72 hours
Positive if induration โฅ10 mm (or โฅ5 mm in high-risk children like HIV-positive)
Indicates TB exposure, not active disease
๐ฆ 4. Microbiological Tests:
Gastric aspirate or induced sputum (for children who can’t produce sputum)
CBNAAT (GeneXpert MTB/RIF):
Rapid test that detects TB and rifampicin resistance
AFB (Acid-Fast Bacilli) smear: Low sensitivity in children
Culture of Mycobacterium tuberculosis: Most confirmatory, but takes 2โ6 weeks
๐ธ 5. Chest X-ray:
Shows typical findings like:
Hilar lymphadenopathy
Infiltrates or consolidation
Cavitation (in older children)
Suggestive but not diagnostic alone
๐งช 6. Blood Tests:
Elevated ESR
CBC: May show anemia or lymphocytosis
๐ง 7. Other Investigations (if extrapulmonary TB):
CSF analysis โ for TB meningitis
Ultrasound/CT โ for abdominal or spinal TB
Fine needle aspiration โ for TB lymphadenitis
๐ 8. Scoring Systems (e.g., National TB Elimination Programme – NTEP):
Used in India for clinical diagnosis of pediatric TB
Based on:
Clinical signs
Nutritional status
History of contact
X-ray findings
Mantoux results
โ Treatment of TB in Children (Based on NTEP Guidelines โ India)
๐ Goal:
To completely eliminate TB bacteria, prevent drug resistance, and promote complete recovery.
๐ท 1. First-Line Anti-TB Treatment (ATT) โ for Drug-Sensitive TB:
Two Phases โ Intensive Phase (IP) + Continuation Phase (CP)