Pathophysiology
This mechanism normally clears pathogens from the respiratory tract but is impaired in conditions like smoke exposure and viral infections.
What is mucociliary clearance?
This is the most common bacterial pathogen causing pediatric community-acquired pneumonia.
What is Streptococcus pneumoniae?
This imaging modality is commonly used to confirm suspected pneumonia by showing findings such as consolidation.
What is a chest X-ray (CXR)?
This is the first-line oral antibiotic and dosing strategy for uncomplicated pediatric CAP.
What is amoxicillin 90 mg/kg/day divided TID?
This antiviral is used to treat influenza-associated pneumonia in hospitalized pediatric patients.
What is Oseltamivir?
This type of infection accounts for the majority of pediatric CAP cases, especially in children under 5 years old.
What are viral infections?
This category of pathogens accounts for up to 75% of pediatric CAP cases
What are viruses?
These three common clinical symptoms raise suspicion for pediatric CAP.
What are fever, cough, and tachypnea?
This is the most important pharmacokinetic reason amoxicillin is dosed TID instead of BID in CAP.
What is time above MIC (T > MIC)?
This class of antibiotics is recommended for pediatric CAP patients with severe penicillin allergy.
What are lincosamides (clindamycin) or tetracyclines (doxycycline)?
This process explains how a viral infection can increase the risk of bacterial pneumonia by impairing host defenses.
What is viral-induced damage to respiratory defenses leading to bacterial superinfection?
These two additional bacteria, along with Streptococcus pneumoniae, are commonly implicated in pediatric CAP.
What are Haemophilus influenzae and Moraxella catarrhalis?
This finding on chest imaging suggests more severe or complicated CAP and may indicate fluid outside the lung.
What is a pleural effusion (parapneumonic effusion)?
This antibiotic combination may be considered when CAP is complicated by empyema or parapneumonic effusion.
What is ampicillin/sulbactam (or amoxicillin/clavulanate)?
This complication of CAP involves infection extending into fluid outside the lung and often requires longer therapy.
What is empyema (or parapneumonic effusion)?
This immune cell plays a key role in the alveoli by engulfing pathogens and is part of the first line of defense against pneumonia.
What are alveolar macrophages?
This pathogen should be suspected in severe CAP, particularly in critically ill patients or those with recent influenza infection.
What is Staphylococcus aureus?
This clinical feature—such as increased work of breathing, retractions, or hypoxia—indicates more severe disease and often warrants hospitalization.
What is respiratory distress?
This is the recommended treatment duration for complicated CAP (e.g., empyema).
What is 10–14 days?
This treatment consideration explains why doxycycline can now be used in children despite historical concerns.
What is lack of significant tooth staining with short-term use (<21 days)?
This pathophysiologic sequence describes how inhaled pathogens lead to pneumonia: impairment of host defenses, pathogen reaching the alveoli, and this final step causing symptoms like consolidation and hypoxia.
What is inflammatory response in the alveoli leading to fluid accumulation (consolidation)?
This timing window after influenza infection is most associated with the development of secondary bacterial pneumonia caused by MRSA.
What is 3–10 days after influenza infection?
This oxygen saturation threshold is commonly used to help identify severe CAP requiring inpatient management.
What is oxygen saturation < 90%?
This diagnostic test has a high negative predictive value and can help guide discontinuation of MRSA coverage.
What is MRSA nares screening?
A pediatric patient with CAP and pleural effusion improves after IV therapy and is transitioning to oral therapy. This is the most appropriate oral agent.
What is amoxicillin (or amoxicillin/clavulanate if beta-lactamase coverage needed)?