<prompt> HACEK group includes all of the following exceptHemophilus arophilusAcinetobacter baumanniEikenella corrodensCardiobacterium hominis  <response>: Ans. b Acinetobacter baumanni Ref. Harrison 17e, p 926; 18e, p 1233 HACEK organism are a group of fastidious, slow growing, Gram negative bacteria whose growth requires an atmosphere of CO,. Species belonging to this group include: Hemophilus species Actinobacillus actinomycetemcomitans Cardiobacterium homin us Eikenella corrodens Kingella kingae Endocarditis is the most common disease caused by them. 