<prompt> Best culture for primary isolation of H. influenzae?Blood agarFildes agarNutrient brothTryptose agar  <response>: Ans. is b i.e., Fildes agarH. influenzae does not grow on blood agar.Culture media used for isolation are Fildes agar best for primary isolation, Levinthal medium capsulated strains show iridescence and Chocolate agar. 