Abstract
SUMMARY: The antigenic structure of Haemophilus vaginalis (Gardner & Dukes, Edmunds, and Amies & Jones strains) was compared by means of gel-diffusion preciptin reactions with that of H. influenzae and Corynebacterium cervicis (Laughton). Haemophilus vaginalis (Amies & Jones) was closely related to H. influenzae, and formed a group with related species; H. vaginalis (Gardner & Dukes) and C. cervicis formed separate groups; but all three groups possessed common antigenic components.
These strains of bacteria are among those reported as being related to Mycoplasma hominis, and their antigenic relationships are thus of importance in this connexion.