<prompt> All are TRUE about pneumococci, EXCEPT:Spherical gram positive bacteria22 species are recognisedThey reduce iron in hemoglobin to produce a green colour in blood agarThey grow best in 40 CO2  <response>: Pneumococci are spherical gram-positive bacteria . Greek streptos, meaning twisted, and kokkos, meaning berry. 22 streptococcal species are recognized and are divided fuher into groups based on their hemolytic propeies. S. pneumoniae belongs to the alpha-hemolytic group that produces a greenish color on blood agar because of the reduction of iron in hemoglobin The bacteria are fastidious and grow best in 5 CO2. Ref: Harisson, Edition - 18, Page 1151 