Multiple choice HAECK organisms are a part of normal oropharyngeal flora. C in HAECK stands for Citrobacter freundii Cardiobacterium hominis Corynaebacterium diptheriae Candida albicans Reveal answer Fill a bubble to check yourself B Correct answer Explanation C in HAECK stands for Cardiobacterium hominis. It is a Gram-negative bacillus.