II. Epidemiology
- Nontypeable Hib (NTHi) is the second most common cause of Community Acquired Pneumonia (behind Pneumococcus)
- NTHi Pneumonia frequently complicates Chronic Bronchitis (Non-Typeable Haemophilus Influenzae)
III. Pathophysiology
- See Haemophilus Influenzae
- Typically caused by nontypeable Haemophilus Influenzae (NTHi)
IV. Risk Factors
- Chronic lung disease (e.g. COPD, Chronic Bronchitis, Bronchiectasis)
- Chronic Liver Disease
- Alcohol Use Disorder
- Elderly patients
V. Findings: Symptoms and Signs
- See Bacterial Pneumonia
- Similar presentation to Pneumococcal Pneumonia
- Productive, Purulent Sputum is common
- Less severe course than Pneumococcal Pneumonia
VI. Labs
-
Gram Stain
- Pleomorphic, facultatively anaerobic Gram Negative Rods (coccobacilli)