<prompt> Culture medium used for corynebacterium diphtheriae-Loefflers serum slopeTetrathionate brothSelenite F brothChocolate agar  <response>: Ans. is a i.e., Loefflers serum slope The usual media employed for cultivation of diphtheria bacillus are1 Loefflers serum slope It is used for rapid diagnosis as growth is shown within 4-8 hours.2 Tellurite blood agar Tinsdale medium It acts as selective media, as tellurite inhibits growth of most other bacteria. Growth may take two days to appear. 