Haemophilus influenzae type b

**Definition:** A type of H. influenzae isolated most frequently from biotype I. Prior to vaccine availability, it was a leading cause of childhood meningitis.

**Tree numbers:** - B03.440.450.600.450.330.150 - B03.660.250.550.290.330.150

**Synonyms:** - Hib - Hemophilus influenzae type b