Identification of Mima polymorph and Herellea vaginicola now named as genus Acinetobacter, was difficult in gonorrhae cases due to presence of large numbers of gram-positive cocci and gram-negative rods. Herellea Agar was formulated by Mandel, Wright and McKinnon, which differentiated gram-negative, fermentative and non-fermentative organisms. This medium is particularly suitable for the isolation of Acinetobacter calcoaceticus, A. anitratum (formerly H. vaginicola) and A.lwoffii (formerly M. polymorpha).

for the selective isolation and differentiation of gram-negative, fermentative and non-fermentative organisms especially for differentiation of organisms of Mima and Herellea group