Bacteria

Haemophilus Influenzae Pneumonia

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Haemophilus Influenzae Pneumonia, H. Influenzae Pneumonia

  • See Also
  1. Bacterial Pneumonia
  2. Haemophilus Influenzae
  • Epidemiology
  1. Nontypeable Hib (NTHi) is the second most common cause of Community Acquired Pneumonia (behind Pneumococcus)
  2. NTHi Pneumonia frequently complicates Chronic Bronchitis (Non-Typeable Haemophilus Influenzae)
  • Pathophysiology
  1. See Haemophilus Influenzae
  2. Typically caused by nontypeable Haemophilus Influenzae (NTHi)
  • Risk Factors
  1. Chronic lung disease (e.g. COPD, Chronic Bronchitis, Bronchiectasis)
  2. Chronic Liver Disease
  3. Alcohol Use Disorder
  4. Elderly patients
  • Findings
  • Symptoms and Signs
  1. See Bacterial Pneumonia
  2. Similar presentation to Pneumococcal Pneumonia
    1. Productive, Purulent Sputum is common
    2. Less severe course than Pneumococcal Pneumonia
  • Labs
  1. Gram Stain
    1. Pleomorphic, facultatively anaerobic Gram Negative Rods (coccobacilli)
  1. See Haemophilus Influenzae
  2. See Pneumonia Management
  • Prevention
  1. See Haemophilus influenzae B Vaccine (Hib Vaccine)
  • References
  1. Forstner (2016) J Infect 72(5):554-63 +PMID: 26940505 [PubMed]
  2. Shoar (2021) Open Forum Infect Dis 8(4):ofaa622 +PMID: 33855100 [PubMed]