<prompt> Most of the cases of Listeria are due to serovar14a4b6  <response>: Ans. is c i.e., 4b LISTEROSIS . Mode of transmission; Food borne --- Most common most cases are due to serotype 4b Nosocomial -- In late onset neonatal infection. . Foods implicated in infection include contaminated colesaw, pasteurized milk, soft cheese, pate, ready to eat turkey and pork productes, hot dogs, butter, prepared salads, undercooked chicken. 