Bacterial meningitis due to Haemophilus influenzae has become a rare, albeit not exceptional occurrence since generalized vaccination against that pathogen was instated, concerning as well incapsulated b and non-b Haemophilus influenzae strains, as non-incapsulated strains.
Case report: A 19-month-old fully immunized infant was referred to our hospital for bacterial meningitis. CSF analysis elicited biotype III, non-incapsulated Haemophilus influenzae.
Conclusion: Generalizing Haemophilus influenzae preventive inoculation has revolutionized the epidemiology of bacterial meningitis; however, a residual risk exists, which deserves to be taken into account.