<prompt> True about cryptococcus are all exceptPrimarily infects lungUrease negativeIndia-ink is usedAll are true  <response>: Ans. is b i.e., Urease negative CRYPTOCOCCUS NEOFORMANS The only pathogenic yeast Four capsular serotypes - A, B, C and D It has polysaccharide capsule Most infections in immunocompromized patients are caused by serotype A. Pigeon droppings commonly contains serotype A and D. Eucalyptus tree contain serotype B. It is urease positive. Mode of transmission By inhalation of the fungus into the lung most common Through skin or mucosa some times. 