Corynebacterium diphtheriae can be grown within 6-8 hour on
Potassiu, tellurite media with iron
McConkey's agar
Dorset egg medium
Loeffler's serum slope
The usual media employed for the cultivation of diphtheria bacilli are Loeffler's serum slope and Tellurite blood agar. Loeffler's serum slope: Diphtheria bacilli grow on Loeffler's serum slope very rapidly and colonies can be seen in 6-8 hours, long before other bacteria grow. Colonies are first small, circular white opaque discs but enlarge on continued incubation and may acquire a distinctly yellow tint. Reference: Textbook of Microbiology; Anathanarayan and panicker's; 10th edition; Page no: 242
Bacteriology