<prompt> A child presented with fever and lymphadenopathy. Oral examination shows a grey membrane over right tonsil. Which of the following medium will be used for early diagnosis of pathogen?Nutrient agarBlood agarLoefflers serum slopeLowenstein Jensen medium  <response>: Ans. is c i.e., Loefflers serum slopeRef: Ananthanarayan, 9the, p. 240 and 8the, p. 235-236Fever, cervical lymphadenopathy and grey membrane on the tonsil extending to anterior pillar is suggestive of diphtherial infection. For rapid growth the specimen is inoculated on Loefflers serum slope which shows the growth in 6 hours. 