Salmonella gastroenteritis 1. Gram-negative bacillus does not ferment lactose motile 2. Styphoidal: infect human S nontyphoidal: infect both wide and domestic animalSalmonella Gastroenteritis 1. Gram-negative bacillus, does not ferment lactose, motile. 2. S.typhoidal: infect human S.nontyphoidal: infect both wide and domestic animal 11