Haemophilus influenzae biochemotyping.

Biochemotyping was performed in 129 strains of Haemophilus influenzae. 95% of strains could be assigned to one of the five biochemotypes proposed by Kilian. Most of the serotype B strains isolated in meningitis belonged to biochemotype I. The biochemical differentiation of Haemophilus influenzae is regarded as a reliable technique deserving further application.