<prompt> True about legionella -Readily grows in simple mediaNon-motileBCYE is selective mediumCapsulated  <response>: Ans. is c i.e., BCYE is selective medium Legionellao Legionella is gram-negative, noncapsulated coccobacillus which is motile by polar or subpolar flagella.o It is best visualized by direct flurescent antibody DFA.o Most common species infecting man is L pneumophila most common serogroup 1. Other important species is L. micdadei Pittsburgh pneumonia agent which is partial acid fast.o At least 14 serogroups of L. pneumophila have been identifiedo L. pneumophila serogroup l SG 1 accounts nearly all severe infections.o L. pneumophila serogroup 6 is more commonly involved in hospital - acquired legionnaires disease.Cultureo Strict aerobeo Has fastidious requirements and grow on complex media such as buffered charcol, yeast extract BCYE agar. 