<prompt> All of the following are features of mycobacterium tuberculosis, except :Non spore formingAerobic bacteriumMeasures 0.5-3 micon mGram stain as gram positive  <response>: M.Tuberculosis is often neutral on gram staining. Once stained it can be decolorised by acid alcohol. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 134 