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Updated: May 11, 2026

Assessing Respiratory Immune Responses to Haemophilus Influenzae
Published on: June 29, 2021
Haemophilus influenzae type f meningitis in a previously healthy boy
Andreas Ronit1, Ronan M G Berg, Helle Bruunsgaard
1Centre of Inflammation and Metabolism, Department of Infectious Diseases, University Hospital of Copenhagen, Copenhagen Ø, Denmark.
Abstract:
Non-serotype b strains of Haemophilus influenzae are extremely rare causes of acute bacterial meningitis in immunocompetent individuals. We report a case of acute bacterial meningitis in a 14-year-old boy, who was previously healthy and had been immunised against H influenzae serotype b (Hib). The causative pathogen was identified as H influenzae serotype f (Hif), and was successfully treated with ceftriaxone. An immunological evaluation revealed transient low levels of immunoglobulins but no apparent immunodeficiency was found 2 years after the clinical insult.
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