[A preliminary report on the preparation of antisera against Haemophilus influenzae]

The antigenicity of 5 strains of serotype b Haemophilus influenzae was compared. Strain 58534 showed a higher titer than the rest four. Three lots of antisera were made by immunizing rabbits with 6 strains of Haemophilus influenzae. The results indicated that the antibody titer against strain 58534 also showed a higher level, and the titer only dropped by one dilution after stored in cool place for half a year. We considered that Haemophilus influenzae serotype b strain 58534 is a good strain for the preparation of antiserum against Haemophilus influenzae.