identify the unknown microorganism Indole test : No red ring produced on top of media after adding Kovac's reagent H2S test : No black precipitate was produced after 48 hr incubation BCP Glucose test : Media remained purple and no bubble in the Durham tube Urease test : media remained light orange after 48 hr incubation Citrate test : Media turned blue after 48 hr incubation Gelatin test : Gelatin was liquid after refrigeration Gram stain : negative Cell Morphology : rods Oxygen requirement : aerobe.