Earliest growth of diphtheria is detect on which media ?
Ans. is 'd' i.e., 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.
Potassium tellurite media with iron
McConkey's agar
Dorset egg medium
Loeffler's serum slope