An improved antiserum agar method for detecting carriage ofHaemophilus influenzae type b

Abstract
Enriched Columbia medium was tested against Levinthal medium for the isolation ofHaemophilus influenzae type b. In both media,Haemophilus influenzae type b recovery and antigen-antibody precipitation halos were equivalent.Haemophilus influenzae type b colony size and iridescence were superior on enriched Columbia medium. Enriched Columbia medium is inexpensive, simply prepared and easily standardised.