Bronchopneumonia paediatric

Reading File

Finding Sources

Searching PubMed

"bronchopneumonia" AND "children" AND "management"

Reading File

Finding Sources

Reading File

Searching PubMed

"community acquired pneumonia" AND "pediatric" AND "guidelines"

Reading File

Loading Image

I now have all the information needed to compose a thorough, well-structured answer. Let me put it together.

Bronchopneumonia in Paediatrics

Definition and Pathology

Bronchopneumonia is a pattern of pneumonia in which the focus of infection and the inflammatory response cause epithelial ulceration of the bronchial walls with fibrinopurulent exudate filling the surrounding peribronchiolar alveoli. This produces a patchy, multifocal, segmental distribution - in contrast to the homogeneous consolidation of lobar pneumonia. Segmental involvement can become confluent, appearing more homogeneous on imaging. It is the dominant pattern of pneumonia in infants and young children.

Fishman's Pulmonary Diseases and Disorders, p. 2137

Epidemiology

Globally, pneumonia is the leading cause of death in children under 5, with ~120 million cases and nearly 1.3 million deaths annually. Children under 2 years account for 81% of paediatric deaths from pneumonia. In the developed world, pneumonia causes ~1 million hospitalisations per year in children and is the second costliest reason for paediatric hospitalisation in the United States.

Tintinalli's Emergency Medicine, p. 854

Pathophysiology

Pathogens reach the lower respiratory tract by:

Inhalation/aspiration (most common - droplet or fomite transmission for viruses, nasopharyngeal colonisation then spread for bacteria)
Contiguous spread from upper airway
Haematogenous seeding (less common)

Anatomic defences include nasal turbinates, cilia, epiglottis, cough reflex, secretory IgA, alveolar macrophages, and cellular immunity. Once infection is established, injury to respiratory epithelium causes interstitial inflammation and alveolar exudate, leading to atelectasis, impaired oxygenation, and V/Q mismatch.

Viruses are the most commonly detected cause, accounting for over 70% of hospitalised paediatric pneumonia in the United States.

Tintinalli's Emergency Medicine, p. 854

Age-Specific Aetiology

This is the most important frame for paediatric bronchopneumonia - the causative agent varies dramatically with age.

Age Group	Dominant Pathogens
Neonates (0-30 days)	Group B Streptococcus, Klebsiella, E. coli, Listeria monocytogenes; S. aureus, S. pneumoniae (late-onset)
Infants 1-3 months	RSV, rhinovirus, parainfluenza; also C. trachomatis (afebrile pneumonitis with staccato cough)
Infants/toddlers 30 days-2 years	RSV, rhinovirus, influenza, parainfluenza, human metapneumovirus, adenovirus; S. pneumoniae (most common bacterial cause); H. influenzae (type b in unvaccinated)
Children 2-5 years	RSV, rhinovirus, human metapneumovirus; S. pneumoniae, H. influenzae
Children 5-13 years	Viruses still predominate; M. pneumoniae (~17% of cases), C. pneumoniae, S. pneumoniae; S. aureus, Group A Streptococcus, nontypeable H. influenzae
Adolescents	Atypical organisms (M. pneumoniae, C. pneumoniae) take on an adult-like pattern

Additional organisms to consider in appropriate settings: B. pertussis (including in vaccinated children - immunity wanes), M. tuberculosis (endemic areas, immunocompromised), varicella-zoster (unvaccinated).

S. aureus and non-encapsulated H. influenzae classically produce a bronchopneumonic radiographic pattern. Segmental bronchopneumonia is also the typical pattern for Chlamydophila pneumoniae, M. pneumoniae, and most viral pneumonias.

Tintinalli's Emergency Medicine, pp. 854-855
Fishman's Pulmonary Diseases and Disorders, p. 2137

Clinical Features

Cardinal symptoms: cough, fever, tachypnea, and respiratory distress - though these vary by age and causative agent.

Key signs to elicit:

Tachypnoea - the single most sensitive sign (WHO cut-offs below)
Chest indrawing / subcostal retractions - indicates severe disease
Nasal flaring, grunting - in infants
Fever - common but nonspecific
Auscultation - crepitations, decreased breath sounds, bronchial breathing

Important clinical pearls:

Young infants (<2 months) may present with non-specific signs only: poor feeding, hypothermia (not fever), and mild chest indrawing may be normal in healthy young infants due to soft chest wall
Lower lobe pneumonia can present as abdominal pain and mimic appendicitis
Persistent or recurrent pneumonia should prompt investigation for cystic fibrosis, immune deficiency, or anatomic abnormality
Chlamydia pneumonitis in infants 1-3 months produces a distinctive staccato cough with tachypnoea and diffuse pulmonary infiltrates, often afebrile
Tintinalli's Emergency Medicine, pp. 854-856

WHO / IMCI Classification (2 months to 5 years)

This is the standard framework used in primary care and resource-limited settings:

Signs	Classification	Action
Chest indrawing (+ or - fast breathing)	Severe pneumonia	Refer urgently; give first dose antibiotic; treat fever/wheeze
Fast breathing, no chest indrawing	Pneumonia	Home care + oral antibiotic; review in 2 days
No chest indrawing, no fast breathing	No pneumonia: cough or cold	Symptomatic; reassess if not improving in 30 days

Fast breathing thresholds (WHO):

Age 2-11 months: ≥50 breaths/minute
Age 12 months-5 years: ≥40 breaths/minute

Young infants (<2 months): fast breathing = ≥60 breaths/minute. Any pneumonia in a young infant is classified as severe - refer immediately.

Park's Textbook of Preventive and Social Medicine, pp. 191-192

Investigation

Chest Radiograph

Not required routinely in mild, uncomplicated presentations. Indications include:

Toxic appearance with respiratory findings
Age 0-3 months with fever + respiratory symptoms (part of full sepsis workup)
Age <5 years with temperature >39°C lasting ≥5 days, WBC ≥20,000/mm³, no clear source
Suspicion of complications (effusion, pneumothorax, abscess)

Radiographic pattern in bronchopneumonia: patchy, multifocal, bilateral airspace opacities - not confined to a single lobe. Note that chest radiograph:

Is not the gold standard - neither 100% sensitive nor 100% specific
Cannot reliably distinguish bacterial from viral aetiology
May be falsely positive: atelectasis from viral bronchiolitis can mimic infiltrates

Chest X-ray showing poor inspiration mimicking consolidation in a 4-month-old infant - Tintinalli's Emergency Medicine

Poor inspiration can produce false infiltrates and apparent cardiomegaly in a normal infant - an important pitfall in paediatric radiology.

Lung Ultrasound

Early evidence shows high interobserver agreement and acceptable sensitivity/specificity when performed by an experienced operator - a useful bedside adjunct, particularly where radiation exposure is a concern.

Microbiology

Definitive identification requires invasive procedures (BAL, lung puncture, pleural fluid culture/PCR) - usually impractical in the ED
Blood cultures have low yield in community-acquired pneumonia
Rapid viral detection via nasopharyngeal swab is useful for RSV, influenza, adenovirus
Tintinalli's Emergency Medicine, pp. 855-856

Treatment

General Principles

All children with suspected bacterial pneumonia should receive prompt empiric antibiotics
Oral antibiotics are adequate for most mild-to-moderate cases
Parenteral therapy is indicated for neonates and severe/hospitalised cases
Duration: typically 7-10 days (5 days if azithromycin is used)
Supportive care: oxygen if SpO₂ <92-94%, adequate hydration, fever management

Empiric Antibiotic Therapy by Age

Neonates (<1 month):

Ampicillin (covers Listeria, Group B Streptococcus) + gentamicin or cefotaxime (gram-negative coverage)
Ceftriaxone is contraindicated in neonates (displaces bilirubin)

Young infants 1-3 months:

Afebrile pneumonitis (Chlamydia pattern): erythromycin or clarithromycin
Azithromycin avoided in this age group - increased risk of pyloric stenosis

Infants/children 3 months-5 years:

High-dose oral amoxicillin (80-100 mg/kg/day) - drug of choice for suspected bacterial pneumonia
If high penicillin resistance in community, incomplete immunisation, or life-threatening infection: third-generation cephalosporin (ceftriaxone or cefotaxime)

Children 5-18 years:

Amoxicillin (with or without clavulanate) as first-line for simple CAP
Macrolide monotherapy reasonable if atypical pneumonia is strongly suspected
Hospitalised children ≥5 years with unclear aetiology: β-lactam + macrolide
Suspected resistant/multiple pathogens: third-generation cephalosporin + macrolide

WHO Antibiotic Dosing for Inpatients (Children 2 months - 5 years, Severe Pneumonia)

First 48 hours:

Benzyl penicillin 50,000 IU/kg/dose q6h IM, OR
Ampicillin 50 mg/kg/dose q6h IM, OR
Chloramphenicol 25 mg/kg/dose q6h IM

If improving after 48 hours: step down to oral procaine penicillin (50,000 IU/kg once daily IM) or oral ampicillin/chloramphenicol for 3 more days.

If not improving after 48 hours: switch antibiotic class (e.g., ampicillin → chloramphenicol IM; or add cloxacillin 25 mg/kg/dose q6h + gentamicin 2.5 mg/kg/dose q8h).

Very severe disease: chloramphenicol IM is drug of choice for 10 days total; if no improvement at 48 hours, switch to cloxacillin + gentamicin.

Young infants <2 months: ampicillin + gentamicin IM (chloramphenicol not recommended as first line in this age group).

Tintinalli's Emergency Medicine, pp. 857-858
Park's Textbook of Preventive and Social Medicine, pp. 192-193

Severity Assessment and Disposition

Indications for Hospitalisation

Age <3-6 months
Oxygen saturation <92-94%
Respiratory distress (retractions, grunting, nasal flaring)
Toxic appearance
Dehydration or inability to feed
Failure to respond to outpatient therapy
Suspected complications (effusion, empyema, pneumothorax, abscess)
Unreliable follow-up or social concerns

Complications

Parapneumonic effusion / empyema - common with S. pneumoniae, S. aureus
Lung abscess - S. aureus, anaerobes
Pneumatoceles - S. aureus in infants
Tension pneumothorax - rare but life-threatening
Septicaemia / septic shock
A child returning with worsening symptoms after initial treatment should raise concern for secondary bacterial pneumonia or a resistant/unusual pathogen

Reassessment (WHO Framework)

In a child taking an antibiotic for pneumonia, reassess in 2 days:

Finding	Action
Worsening / unable to drink / chest indrawing / danger signs	Refer urgently
Same - no improvement	Change antibiotic or refer
Improving - slower breathing, less fever, eating better	Complete 5-day course

Park's Textbook of Preventive and Social Medicine, p. 191

Prevention

Vaccines: S. pneumoniae (PCV13/PCV15), H. influenzae type b, pertussis, measles, varicella, influenza (annual, recommended from age 6 months)
Breastfeeding - provides passive immunity via secretory IgA
Avoidance of tobacco smoke exposure
Hand hygiene and respiratory etiquette

Sources:

Tintinalli's Emergency Medicine, Chapter 128 (Paediatric Pneumonia)
Park's Textbook of Preventive and Social Medicine, Chapter on ARI/IMCI
Fishman's Pulmonary Diseases and Disorders, Chapter 122 (Bronchopneumonia)

This is a shared conversation. Sign in to Orris to start your own chat.