Pneumonia in Children
Model Case Presentation
Patient Demographics
Name: Master Aryan, Age: 2.5 years, Gender: Male, Informant: Mother (Reliable)
Chief Complaints
- Fever — 5 days
- Cough — 5 days
- Fast breathing and chest indrawing — 3 days
History Summary
Sudden onset high-grade fever (39.5°C), initially associated with chills, followed by a productive-sounding cough. Mother noted the child's breathing was becoming faster over the last 3 days. Child is not eating well, is irritable, and looks unwell. One episode of vomiting. No cyanosis. No wheeze. No history of choking on a foreign body. Immunizations up to date including PCV13. No contact with tuberculosis. No prior hospitalization.
Born at term, NVD, uneventful antenatal and postnatal course. No known chronic illness. No family history of asthma or TB.
Examination Summary
| Parameter | Finding | Significance |
|---|---|---|
| Temperature | 39.2°C | High-grade fever — bacterial etiology likely |
| RR | 54/min | Tachypnea (>40/min for this age = fast breathing) |
| HR | 128/min | Tachycardia (expected with fever) |
| SpO2 | 94% on room air | Mild hypoxia — requires supplemental O₂ |
| Nasal flaring | Present | Respiratory distress |
| Lower chest indrawing | Present | Classifies as Severe Pneumonia (WHO/IMNCI) |
| Cyanosis | Absent | — |
Respiratory System: Trachea central. Chest expansion reduced on the right side. Vocal fremitus increased on the right. Percussion note dull over right lower zone. On auscultation — bronchial breath sounds with crepitations (crackles) over right lower zone. Vocal resonance increased (bronchophony). Left side normal.
Other systems: Abdomen — mild hepatomegaly (2 cm) possibly due to right lobe displacement/sepsis. No meningismus. No rash. Throat not inflamed.
✅ Complete Diagnosis
Community-Acquired Pneumonia — Right Lower Lobe Lobar Pneumonia, Bacterial (most likely Streptococcus pneumoniae), Severe (WHO classification — lower chest indrawing with hypoxia), in a previously healthy 2.5-year-old male.
📝 History — Exam Q&A
Pneumonia is an acute infection of the pulmonary parenchyma (lung tissue), causing inflammation of the alveolar spaces and/or surrounding interstitium. Clinically, it is defined by the WHO as cough or difficult breathing with age-specific tachypnea in a child 2–59 months of age. Radiologically, it is confirmed by the presence of new alveolar infiltrate(s) on chest X-ray.
Pneumonia is the leading single infectious cause of death in children under 5 years globally (WHO). It accounts for approximately 14-15% of all deaths in children under 5. In India, it remains the most common cause of childhood hospitalization and is a major public health priority. Most pneumonia deaths occur in low- and middle-income countries.
The WHO (2012 revised) / IMNCI classification divides pneumonia in children aged 2–59 months into two categories:
| Category | Signs | Treatment |
|---|---|---|
| Pneumonia | Tachypnea (age-specific fast breathing) without chest indrawing or danger signs | Oral amoxicillin at home for 5 days |
| Severe Pneumonia | Chest indrawing (lower chest wall indrawing) OR any general danger sign (unable to drink, persistent vomiting, convulsions, lethargy/unconscious, stridor in a calm child, severe malnutrition) | Parenteral antibiotics; Refer/Hospitalize |
💡 Important Note
The old 3-category classification (no pneumonia → pneumonia → severe pneumonia → very severe pneumonia) was revised in 2012. Now there are only 2 categories. The previous "severe pneumonia" (chest indrawing alone) and "very severe" are merged into a single "Severe Pneumonia" category requiring hospitalization.
| Age Group | Tachypnea Threshold (breaths/min) |
|---|---|
| < 2 months | ≥ 60/min |
| 2–12 months | ≥ 50/min |
| 1–5 years | ≥ 40/min |
Respiratory rate must be counted for a full 60 seconds when the child is calm and afebrile (fever increases RR; reassess after antipyretics if needed).
| Age Group | Common Organisms |
|---|---|
| Neonates (0–30 days) | Group B Streptococcus, E. coli, Klebsiella, Listeria monocytogenes |
| 1–3 months (Afebrile pneumonitis) | Chlamydia trachomatis (most common), Ureaplasma, viruses |
| 1 month – 2 years | Viruses (RSV, Parainfluenza, Adenovirus, hMPV — most common), S. pneumoniae |
| 2–5 years | Viruses still dominant; S. pneumoniae, H. influenzae rising |
| 5–13 years (school age) | S. pneumoniae (most common bacterial), Mycoplasma pneumoniae (most common atypical), C. pneumoniae |
| Adolescents | M. pneumoniae, S. pneumoniae, C. pneumoniae |
💡 Key Mnemonics
Most common overall bacterial cause: Streptococcus pneumoniae (pneumococcus). Most common viral cause in infants: RSV. Walking pneumonia (school age): Mycoplasma pneumoniae.
| Type | Pattern | Common Cause |
|---|---|---|
| Lobar Pneumonia | Entire lobe consolidated | S. pneumoniae |
| Bronchopneumonia (Lobular) | Patchy, peribronchial; multiple lobes | S. aureus, H. influenzae, viruses |
| Interstitial Pneumonia | Diffuse interstitial infiltrates | Viruses, Mycoplasma, Chlamydia |
| Round Pneumonia | Focal spherical opacity on CXR | S. pneumoniae (children <8 years) |
| Feature | Typical Pneumonia | Atypical Pneumonia |
|---|---|---|
| Onset | Acute (sudden) | Insidious, gradual (3–5 days) |
| Fever | High-grade, with chills/rigors | Low-grade |
| Cough | Productive-sounding, painful | Dry, non-productive, persistent |
| Toxicity | Child looks toxic | Child "walks in" — not very ill (walking pneumonia) |
| Chest findings | Focal: dullness, bronchial breath sounds, crepitations | Minimal; may have wheeze |
| CXR | Lobar/segmental consolidation | Bilateral perihilar/reticulonodular infiltrates; may appear worse than child looks |
| Organisms | S. pneumoniae, H. influenzae, S. aureus | Mycoplasma, Chlamydia, viruses |
| WBC | Elevated, neutrophilia | Normal or mildly elevated |
This is a distinct syndrome in infants aged 1–3 months, caused most commonly by Chlamydia trachomatis (acquired perinatally from birth canal). Classic features:
- No fever (afebrile) — despite pneumonia
- Staccato cough (short, repetitive bursts)
- Tachypnea without significant distress
- Bilateral hyperinflation on CXR with interstitial infiltrates
- Eosinophilia (> 400/mm³) in ~50%
- May have concurrent conjunctivitis (also caused by C. trachomatis)
Treatment: Erythromycin or azithromycin (macrolide) for 14 days. Tetracycline is contraindicated in infants.
- Age < 2 years — immature immune system
- Malnutrition — impaired immune response
- Zinc deficiency — increased susceptibility
- Non-breastfed infants — lack of maternal IgA and protective factors
- Indoor air pollution (biomass fuel, tobacco smoke)
- Overcrowding
- Incomplete immunization (especially PCV, Hib)
- Underlying conditions: CHD, sickle cell disease, HIV, cystic fibrosis, immunodeficiency, neuromuscular disease
- Foreign body aspiration — recurrent/persistent pneumonia in same lobe
- No choking episode: Rules out foreign body aspiration (especially if recurrent pneumonia in same lobe)
- No wheeze / no response to bronchodilator: Helps distinguish from asthma or bronchiolitis
- No contact with TB patient: Chronic cough, immunocompromised
- No rash, joint pain: Helps rule out Mycoplasma extra-pulmonary manifestations
- Immunization status: PCV13/PCV10, Hib vaccine reduces certain bacterial causes
- No HIV exposure: Immunocompromised — risk of Pneumocystis jirovecii (PJP)
- No failure to thrive / recurrent infections: Think primary immunodeficiency
Staphylococcus aureus pneumonia is important because it is rapidly progressive, fulminant, and carries high mortality if not recognized early. Key features:
- Occurs most often in infants < 1 year, especially neonates
- May follow influenza infection (post-influenza superinfection)
- Rapidly worsening course with high-grade fever, toxicity
- CXR: Pneumatoceles (thin-walled, air-filled cysts) — highly specific for S. aureus
- Empyema and pneumothorax are common complications
- CA-MRSA (community-acquired MRSA) is an emerging concern
Treatment: IV cloxacillin (MSSA) or vancomycin/linezolid (MRSA). Anti-staphylococcal penicillins are first-line for MSSA.
🩺 Examination — Exam Q&A
- Tachypnea — most sensitive early sign
- Nasal flaring — alae nasi dilating with each breath
- Lower chest (subcostal) indrawing — inward movement of the lower chest wall on inspiration; sign of severe pneumonia
- Intercostal and subcostal retractions
- Grunting — expiratory grunt (auto-PEEP to maintain alveolar pressure); sign of severe respiratory distress, especially in infants
- Head nodding — use of accessory muscles of respiration
- Cyanosis — late/severe sign; peri-oral or central
- Apnea — in infants (especially young infants < 2 months)
⚠️ Important Distinction
Intercostal indrawing (between ribs) is a sign of respiratory distress but is NOT the same as lower chest wall indrawing (WHO definition of severe pneumonia). "Lower chest indrawing" = inward movement of the lower part of the chest wall on inspiration, best seen by having the child lie flat.
| Method | Finding | Reason |
|---|---|---|
| Inspection | Reduced expansion on affected side | Painful, stiff consolidated lung |
| Palpation | Trachea central (unless large effusion); Increased vocal/tactile fremitus over consolidation | Sound transmitted better through solid lung |
| Percussion | Stony dullness over consolidated area | Airless consolidated lung |
| Auscultation | Bronchial breath sounds over consolidation; Crepitations (crackles); Increased vocal resonance (bronchophony, whispering pectoriloquy, aegophony) | Sound transmitted through airless, patent bronchus |
💡 Note on Crepitations
In pneumonia, crepitations are fine, end-inspiratory and are heard over the area of consolidation. They result from the reopening of collapsed alveoli. They are distinct from the coarse crackles of bronchitis.
Bronchial breathing is harsh, high-pitched breathing with equal duration of inspiration and expiration, with a clear gap between the two phases. It is the breath sound normally heard over the trachea and large bronchi.
Why it occurs in pneumonia: Normally, vesicular breath sounds are generated in the peripheral alveoli and the lung parenchyma filters out the high-frequency bronchial sounds. In consolidation, the airless lung acts as an excellent conductor of sound (solid medium transmits sound better). The high-pitched bronchial sounds from the central airways are transmitted without filtering → bronchial breathing is heard peripherally.
Conditions producing bronchial breathing: Lobar consolidation, lobar collapse (adjacent), pleural effusion (above the fluid level — Skodaic resonance), and fibrosis.
| Method | Finding |
|---|---|
| Inspection | Bulging of intercostal spaces on affected side (large effusion) |
| Palpation | Trachea and mediastinum shifted away from effusion (large); Vocal fremitus absent/decreased over effusion |
| Percussion | Stony dull — similar to consolidation, but shifts with position (shifting dullness) |
| Auscultation | Breath sounds absent/decreased over effusion; May have bronchial breathing above the effusion (compressed lung) |
💡 Distinguish Consolidation vs Effusion
Consolidation: Increased fremitus + bronchial breathing.
Effusion: Decreased/absent fremitus + absent breath sounds + stony dull percussion. Also, consolidation does not shift; effusion shifts with posture.
Grunting (expiratory grunt) is a sign of severe respiratory distress. It occurs when the child partially closes the glottis during expiration to generate positive end-expiratory pressure (auto-PEEP), which prevents alveolar collapse. It indicates that the child is working hard to keep the alveoli open and is a marker of impending respiratory failure.
Grunting is particularly common in infants with severe pneumonia, RDS, sepsis, and metabolic acidosis. Its presence warrants urgent assessment and intervention (oxygen, ICU monitoring).
Young infants (< 2 months) present atypically — the classic signs of pneumonia (dullness, bronchial breathing) may be absent. Watch for:
- Poor feeding / inability to breastfeed
- Lethargy, irritability, or altered consciousness
- Temperature instability (hypothermia is more common than fever in neonates)
- Apnea episodes
- Grunting
- Tachypnea ≥ 60/min
- Chest indrawing
Any young infant with these signs is classified as having Possible Serious Bacterial Infection (PSBI) under IMNCI and requires immediate referral and parenteral antibiotics.
Abdominal pain in pneumonia is a well-recognized but under-appreciated presentation, particularly in right lower lobe pneumonia. It can mimic acute appendicitis, leading to diagnostic confusion. The mechanism involves:
- Diaphragmatic irritation from lower lobe pneumonia radiating to the abdomen
- Referred pain via intercostal nerves (T9–T12)
Clinical clue: Always auscultate and percuss the chest in a child presenting with abdominal pain and fever to exclude pneumonia before considering appendicitis. A normal abdominal examination with tenderness that does not localize to the RIF, combined with respiratory findings, should raise suspicion for pneumonia.
Round pneumonia is a form of early bacterial pneumonia (most commonly S. pneumoniae) that appears as a spherical or rounded opacity on chest X-ray, often mistaken for a mass or tumor.
- Occurs almost exclusively in children < 8 years
- Due to underdeveloped pores of Kohn and canals of Lambert, which prevent spread → infection remains spherical
- Location: Usually posterior lower lobes (>80% posterior, >70% inferior)
- Typically resolves completely with antibiotics without leaving a residual mass
- If it does not resolve after 4–6 weeks, further investigation (CT, bronchoscopy) is required to rule out lung mass
🔬 Investigations — Exam Q&A
No. Pneumonia is primarily a clinical diagnosis, especially in outpatient settings. Per IDSA/PIDS guidelines (2011):
- CXR is NOT required for children managed as outpatients after clinical evaluation (if well enough to be sent home)
- CXR IS indicated when: diagnosis is uncertain, SpO2 <90%, significant respiratory distress, failure to improve after 48–72 hours of antibiotics, suspicion of complications (effusion, abscess), or when hospitalization is planned
Additionally, CXR cannot reliably differentiate viral from bacterial pneumonia.
| Pattern | Typical Cause |
|---|---|
| Lobar / Segmental consolidation (alveolar opacity with air bronchogram) | S. pneumoniae |
| Patchy bilateral bronchopneumonia (peribronchial infiltrates) | S. aureus, H. influenzae, viruses |
| Bilateral perihilar / reticulonodular / interstitial infiltrates | Viral, Mycoplasma, Chlamydia |
| Pneumatoceles (thin-walled, air-filled cysts) | S. aureus (highly specific) |
| Round spherical opacity | S. pneumoniae (round pneumonia) |
| Diffuse bilateral ground glass / perihilar infiltrates in a 1–3 month infant | Chlamydia trachomatis |
| Hilar adenopathy + infiltrates | Mycoplasma, fungi, TB |
| Air bronchogram | Sign of consolidation (air-filled bronchi visible within an opacified lobe) |
| Test | Finding in Bacterial Pneumonia | Note |
|---|---|---|
| CBC | Leukocytosis (WBC >15,000) with neutrophilia | WBC normal/mildly elevated in viral; leukopenia is an alarming sign suggesting overwhelming sepsis |
| CRP | Markedly elevated (>40–80 mg/L) | Non-specific; useful to monitor treatment response |
| Procalcitonin (PCT) | Elevated (>0.5 ng/mL) — more specific for bacterial infection | Better than CRP for bacterial vs. viral distinction; helps guide antibiotic stewardship |
| Blood culture | Positive in ~10–20% of bacterial CAP | Indicated in hospitalized/severe cases; low yield but high value when positive |
| Blood gas (ABG/VBG) | Hypoxemia, possible hypercapnia in severe disease; respiratory alkalosis initially | Only in severe cases requiring ICU care |
| LFT, RFT, electrolytes | May be deranged in severe sepsis | For hospitalized, severe cases |
💡 Remember
Eosinophilia (>400/mm³) in a 1–3 month old infant with pneumonitis suggests Chlamydia trachomatis pneumonia.
- Blood culture: Most practical for bacterial CAP; yield ~10–20%. Must be drawn before starting antibiotics.
- Nasopharyngeal swab / Viral panel (PCR multiplex): Detects RSV, influenza, parainfluenza, adenovirus, hMPV, rhinovirus. Best for viral pneumonia. Helps avoid unnecessary antibiotics.
- Rapid influenza antigen test: Bedside; lower sensitivity than PCR.
- Sputum Gram stain & culture: Rarely useful in children (cannot produce true sputum; contaminated by oral flora).
- Pleural fluid analysis: If effusion present — send for cell count, glucose, protein, LDH, culture, Gram stain. Key to diagnose empyema and identify organism.
- Mycoplasma serology (IgM) / PCR: For suspected atypical pneumonia in school-age children. Cold agglutinins (non-specific but historically mentioned).
- Urine antigen test: For S. pneumoniae — useful in adults; limited value in children (high false-positive rate due to nasopharyngeal colonization).
- Tracheal aspirate / BAL: Intubated patients only; not routine.
CT chest is not routine. It is indicated in:
- Suspected complications: lung abscess, necrotizing pneumonia, bronchopleural fistula, loculated empyema
- Differentiating lung abscess from empyema (CT shows air-fluid level within lung for abscess vs. external to lung for empyema)
- Suspected mass/tumor (round pneumonia not resolving after 4–6 weeks)
- Recurrent pneumonia in same lobe (to rule out airway obstruction, sequestration, CCAM)
- Immunocompromised children with atypical presentation
Lung ultrasound (LUS) is gaining traction as a point-of-care, radiation-free alternative to CXR in children with suspected pneumonia.
- Findings in pneumonia: Subpleural consolidation (hepatization-like appearance), B-lines (comet tails), air bronchograms, reduced lung sliding
- Excellent for: Diagnosing pleural effusion, empyema (distinguishing free from loculated), monitoring response to treatment
- Sensitivity/Specificity: Meta-analyses show sensitivity ~94% and specificity ~96% for consolidation
- Limitations: Operator-dependent; cannot visualize air-space disease deep in the lung well; not widely validated in all pediatric settings
Current guidelines recommend LUS as a supplementary tool or alternative when radiation exposure is a concern, especially in young infants.
Light's criteria are used to differentiate exudate from transudate in pleural fluid. A pleural effusion is an exudate if one or more of the following are present:
- Pleural fluid protein / serum protein ratio > 0.5
- Pleural fluid LDH / serum LDH ratio > 0.6
- Pleural fluid LDH > 2/3 of upper normal limit for serum LDH
Parapneumonic effusions are exudates. Empyema additionally shows:
- Turbid/frankly purulent fluid
- pH < 7.2 (diagnostic of empyema requiring drainage)
- Glucose < 3.3 mmol/L (< 60 mg/dL)
- Positive Gram stain or culture
💊 Management — Exam Q&A
Per IDSA/PIDS 2011 guidelines, hospitalize if:
- SpO2 < 90% on room air (most important)
- Respiratory distress: moderate to severe (nasal flaring, grunting, marked retractions)
- Age < 3–6 months with suspected bacterial pneumonia
- Toxic appearance / unreliable caregiver
- Inability to maintain oral hydration or take oral medications
- Failed outpatient therapy (no improvement in 48–72 hours)
- Suspected complications: effusion, empyema, necrotizing pneumonia
- Underlying comorbidities: immunocompromise, sickle cell, CHD, malnutrition, cystic fibrosis
- IMNCI classification of Severe Pneumonia (chest indrawing or danger signs)
| Age / Setting | Likely Pathogen | Antibiotic of Choice |
|---|---|---|
| Neonates (0–30 days) | GBS, E. coli, Listeria | IV Ampicillin + Gentamicin (or 3rd-gen cephalosporin — NOT ceftriaxone in neonates due to bilirubin displacement) |
| 1–3 months (afebrile pneumonitis) | C. trachomatis, Ureaplasma | Oral/IV Azithromycin or Erythromycin (macrolide) |
| 3 months – 5 years, outpatient, mild | S. pneumoniae, viruses | Oral Amoxicillin (high dose: 90 mg/kg/day in 2 divided doses) for 5 days (WHO: 5 days; IDSA: 5–7 days) |
| 3 months – 5 years, hospitalized, severe | S. pneumoniae | IV Ampicillin or IV Penicillin G; switch to oral amoxicillin when stable |
| >5 years, typical pneumonia, outpatient | S. pneumoniae | Oral Amoxicillin (high-dose) |
| >5 years, atypical pneumonia suspected | Mycoplasma, Chlamydia | Oral Azithromycin (10 mg/kg day 1, then 5 mg/kg days 2–5) |
| Severe hospitalized, all ages | Mixed | IV Ampicillin ± Gentamicin; escalate if no response |
| Suspected S. aureus / MSSA | S. aureus | IV Cloxacillin (anti-staphylococcal penicillin) |
| Suspected CA-MRSA | MRSA | IV Vancomycin or Linezolid |
⚠️ Key Points on Antibiotics
1. Amoxicillin (not co-amoxiclav) is first-line for outpatient CAP. 2. Macrolides are NOT recommended empirically for all hospitalized children — only when atypical infection is confirmed or strongly suspected. 3. Ceftriaxone is contraindicated in neonates (displaces bilirubin → kernicterus).
- Oxygen therapy: Target SpO2 ≥ 94%. Give O2 via nasal prongs (low flow), face mask, or high-flow nasal cannula (HFNC) as needed. Avoid hyperoxia.
- Positioning: Head-elevated or semi-prone position to improve ventilation. Avoid supine in young infants.
- IV fluids: If child is unable to feed; avoid overhydration (risk of SIADH in pneumonia). Restrict to 70–80% maintenance if SIADH suspected.
- Nutrition: Encourage oral feeds if tolerated. NG feeds if needed for adequate intake.
- Antipyretics: Paracetamol (15 mg/kg/dose) or ibuprofen for comfort; does not change the clinical course of pneumonia.
- Pulse oximetry monitoring: Continuous monitoring; can be discontinued when stable and off supplemental O2 for 4–6 hours.
- No chest physiotherapy: Not routinely recommended for uncomplicated CAP (may benefit empyema/post-operative).
- No cough suppressants or mucolytics: Not recommended in children with CAP.
Pulmonary Complications:
- Parapneumonic effusion: Simple exudate — resolves with antibiotics
- Empyema: Infected effusion (pus in pleural space) — requires drainage
- Necrotizing pneumonia: Liquefactive necrosis of lung parenchyma — seen on CT; managed conservatively in most cases (prolonged antibiotics)
- Lung abscess: Necrotic cavity with pus — may require prolonged antibiotics ± drainage
- Pneumatocele: Air-filled thin-walled cyst; typically S. aureus; usually resolves spontaneously
- Pneumothorax: Air leak from ruptured pneumatocele or subpleural bleb; may require chest tube
- Bronchopleural fistula: Communication between bronchus and pleural space; surgical repair may be needed
- Respiratory failure: Requiring mechanical ventilation
Extrapulmonary Complications:
- Sepsis and septic shock (especially S. pneumoniae, S. aureus)
- Meningitis (pneumococcal)
- SIADH — hyponatremia (inflammatory cytokines stimulate ADH)
- Hemolytic anemia (cold agglutinins — Mycoplasma)
- Myocarditis, pericarditis (rare)
- Erythema multiforme, Stevens-Johnson syndrome (Mycoplasma)
- Small, uncomplicated effusion: Continue appropriate antibiotics; monitor with CXR/ultrasound. Usually resolves
- Moderate-large or symptomatic effusion: Pleural fluid sampling — diagnostic and therapeutic thoracentesis
- Empyema (frank pus, pH <7.2, positive culture): Chest drain insertion (intercostal drain — ICD)
- Loculated empyema: Intrapleural fibrinolytics (urokinase or DNase + alteplase) instilled via ICD to break down septations
- VATS (Video-Assisted Thoracoscopic Surgery): For organized/chronic empyema not responding to drainage and fibrinolytics; associated with faster recovery and shorter hospital stay
- Antibiotics: IV for 2–4 weeks, then oral; total 4–6 weeks for empyema
💡 VATS vs Fibrinolytics
Studies show early VATS vs intrapleural fibrinolytics have similar outcomes in pediatric empyema. Both are superior to ICD alone without fibrinolytics. The choice depends on surgical availability and expertise.
SIADH (Syndrome of Inappropriate Antidiuretic Hormone secretion) is a complication of pneumonia (and meningitis) where inflammatory mediators stimulate excessive ADH secretion → water retention → dilutional hyponatremia.
Features: Serum Na < 130 mEq/L; serum osmolality low; urine osmolality relatively high; urine Na > 20 mEq/L; no edema, no hypovolemia; euvolemic state.
Management:
- Treat the underlying pneumonia
- Fluid restriction: 70–80% of maintenance (cornerstone of management)
- Mild-moderate (Na 125–130 mEq/L): Fluid restriction alone
- Severe/symptomatic (Na <120 mEq/L or seizures): Hypertonic saline (3% NaCl) — 2–4 mL/kg IV slowly over 10–20 minutes to raise Na by 3–5 mEq/L
- Correct sodium gradually (not more than 8–10 mEq/L per 24 hours) to avoid osmotic demyelination syndrome
- Pneumococcal Conjugate Vaccine (PCV13 / PCV10): Prevents S. pneumoniae CAP. PCV13 covers 13 serotypes. Given at 6, 10, 14 weeks + booster at 9–12 months (India IAP schedule). One of the most impactful interventions in reducing pediatric pneumonia mortality.
- Hib vaccine (H. influenzae type b conjugate): Prevents H. influenzae pneumonia. Part of pentavalent vaccine (DPT-HepB-Hib) given at 6, 10, 14 weeks.
- Influenza vaccine: Annual vaccine for ≥6 months of age (especially high-risk children).
- COVID-19 vaccine: Reduces COVID-associated pneumonia in eligible children.
- Measles vaccine: Measles is an important cause of and risk factor for pneumonia. MCV1 at 9 months, MCV2 at 15–18 months.
- Pertussis vaccine (DPT): Prevents pertussis pneumonia.
💡 Additional Prevention
Breastfeeding (especially exclusive breastfeeding for 6 months), zinc supplementation, reduction of indoor air pollution, and improved nutrition are key non-vaccine preventive strategies for pneumonia.
- Outpatient uncomplicated CAP: 5 days of amoxicillin (WHO, current IDSA trend). Not more than 7 days.
- Hospitalized, uncomplicated bacterial CAP: IV antibiotics until afebrile and clinically stable, then switch to oral; total course 7–10 days.
- Mycoplasma / atypical pneumonia: Azithromycin for 5 days (or clarithromycin for 7–14 days).
- Staphylococcal pneumonia (MSSA): IV cloxacillin for minimum 3–4 weeks; often 6 weeks total if complicated by abscess or empyema.
- Empyema: IV antibiotics 2–4 weeks, total 4–6 weeks (IV + oral).
- Lung abscess: 4–6 weeks total.
Clinical improvement should guide duration — if the child is afebrile, SpO2 normal, tolerating feeds, IV-to-oral switch is appropriate even after 2–3 days of IV therapy.
🔭 Recent Advances — Exam Q&A
HFNC delivers humidified, heated oxygen at high flow rates (1–2 L/kg/min in children) via specially designed nasal prongs. It provides:
- FiO2 up to 100% (precise oxygen delivery)
- A degree of positive airway pressure (low CPAP-like effect, ~3–5 cmH2O)
- Washes out nasopharyngeal dead space CO2
- Reduces work of breathing
Evidence: In the PARIS trial (2018), HFNC reduced escalation to ICU/intensive care in infants with bronchiolitis. Growing evidence supports its use in severe pneumonia with hypoxia as a step between standard O2 and non-invasive ventilation (NIV/CPAP), potentially preventing intubation.
Limitation: Requires monitoring. If work of breathing worsening despite HFNC, escalate to NIV or intubation promptly.
Antibiotic stewardship aims to ensure appropriate antibiotic use to reduce resistance, minimize side effects, and lower costs. Key recent principles:
- Narrow-spectrum first: Amoxicillin / ampicillin is preferred over broad-spectrum cephalosporins for typical CAP
- Shorter courses: 5-day amoxicillin is non-inferior to 10-day courses for outpatient CAP (multiple RCTs, including SCOUT-CAP 2022)
- No empiric macrolides for hospitalized children: Multiple studies show adding macrolide to beta-lactam does not reduce hospital stay or complications in most hospitalized children
- Procalcitonin-guided therapy: Helps identify children where antibiotics can be safely withheld or de-escalated in viral pneumonia
- IV to oral switch: Early (as soon as tolerating feeds and afebrile) — reduces hospital stay without compromising outcomes
- Multiplex PCR panels: Rapid identification of viruses → avoids unnecessary antibiotics in viral pneumonia
Corticosteroids are NOT routinely recommended in pediatric bacterial CAP. However:
- Severe/refractory Mycoplasma pneumonia: Systemic steroids (dexamethasone or methylprednisolone) are used in severe cases — thought to reduce macrolide-resistant Mycoplasma pneumonia severity by dampening the immune-mediated inflammation (cytokine storm). Evidence remains limited in children.
- PJP (Pneumocystis jirovecii) pneumonia in HIV: Adjunctive corticosteroids (prednisolone) are recommended in severe PJP (PaO2 <70 mmHg) to reduce inflammation-mediated lung damage.
- Pleural effusion/empyema: Intrapleural steroids and systemic steroids have been studied with mixed results; not standard of care.
The pneumococcal conjugate vaccine (PCV) landscape is expanding to cover more serotypes:
- PCV7 (7 serotypes) → PCV10 (10 serotypes) → PCV13 (currently used widely, including in India's UIP)
- PCV15: Licensed in 2021 (US). Covers 15 serotypes (adds 22F and 33F to PCV13). Approved for infants in the US.
- PCV20: Covers 20 serotypes (adds 15B, 16F, 23B, 24F, 31, 35B to PCV15). Initially adult vaccine; being studied in pediatric schedules.
Broader valency vaccines are expected to further reduce pneumococcal disease burden, including serotypes causing antibiotic-resistant pneumococcal infections.
Necrotizing pneumonia (NP) is a severe form of bacterial pneumonia characterized by liquefactive necrosis and cavity formation within consolidated lung, seen on CT as areas of low attenuation or cavitation.
- Causative organisms: S. pneumoniae (increasing — serotype 3, 19A), S. aureus (MRSA), S. pyogenes
- Diagnosis: CT chest (shows hypodense non-enhancing areas within consolidation); CXR may appear as rapidly progressive pneumonia
- Management evolution: Previously thought to require surgery; now conservative management with prolonged IV antibiotics (4–6 weeks) is standard. Most cases resolve completely. Surgery (lobectomy) is reserved for bronchopleural fistula, massive hemorrhage, or failure to respond.
- Prognosis: Despite severe appearance, most children recover with normal lung function.
⚡ Key Points — Quick Revision
One-Liners for Exam
- Leading cause of under-5 death: Pneumonia (globally)
- Most common bacterial cause (all ages): S. pneumoniae
- Most common viral cause (infants): RSV
- Atypical (school age): Mycoplasma pneumoniae → "walking pneumonia"
- Neonatal pneumonia organisms: GBS, E. coli, Listeria
- Afebrile pneumonitis 1–3 months: Chlamydia trachomatis + eosinophilia + staccato cough → Treat with macrolide
- Tachypnea thresholds: <2 mo: ≥60; 2–12 mo: ≥50; 1–5 yr: ≥40 (per minute)
- WHO classification (revised 2012): Only 2 categories — Pneumonia (oral Amoxicillin at home) vs Severe Pneumonia (hospitalize + IV antibiotics)
- Lower chest indrawing: = Severe Pneumonia → Hospitalize
- Grunting: Sign of severe respiratory distress (auto-PEEP); urgent intervention required
- Pneumatoceles on CXR: Think S. aureus
- Empyema pH <7.2: Drain it (ICD)
- Round pneumonia: S. pneumoniae, children <8 yrs; underdeveloped pores of Kohn
- Abdominal pain in pneumonia: Right lower lobe pneumonia can mimic appendicitis
- First-line antibiotic: Amoxicillin (high dose: 90 mg/kg/day) for outpatient CAP
- Duration outpatient CAP: 5 days (WHO/current evidence)
- IV to oral switch: As soon as afebrile and tolerating feeds
- Ceftriaxone contraindicated in neonates: Bilirubin displacement → kernicterus
- SIADH in pneumonia: Restrict fluids (70–80% maintenance); hypertonic saline for severe
- Vaccine prevention: PCV13 (S. pneumoniae), Hib (H. influenzae), Influenza, Measles
- Lung ultrasound: Emerging as radiation-free diagnostic tool; excellent for effusion and consolidation
- Necrotizing pneumonia: Conservative management (prolonged antibiotics) — most resolve; surgery is last resort
- VATS vs fibrinolytics for empyema: Similar outcomes; both superior to ICD alone
🚨 Danger Signs (General) — Immediate Hospitalization
Not able to drink or breastfeed · Persistent vomiting · Convulsions · Lethargic or unconscious · Stridor in a calm child · Severe malnutrition · Central cyanosis · SpO2 <90%