Earliest growth of diphtheria is detect on which media ?: (A) Potassium tellurite media with iron, (B) McConkey's agar, (C) Dorset egg medium, (D) Loeffler's serum slope
Answer is D. 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.