<prompt> Pneumococcus producing mucoid colonies most often is typeIIIIIIIV  <response>: Pneumococci on blood agar, after incubation for 18 hours, the colonies are small, dome-shaped with an area of greenish discoloration alpha hemolysis. some strains streptococcus pneumoniae type III and VII form large mucoid colonies due to the abundance of capsular material. Reference: Textbook of Microbiology; Anathanarayan and panickers; 10th edition; Page no: 224 