Since the chicken itself is a reservoir of
Salmonella, control measures need to start from the
hatchery. Today, there are three different types of
disease considered to be associated with
Salmonella, which are caused by different strains:
typhoid fever, gastroenteritis, and an invasive form.
The two most widely known types are typhoid fever
(caused by Salmonella Typhi) and the
gastroenteritis form most often caused by
Salmonella enteriditis Typhimurium or Salmonella
enteriditis. However, S. Typhimurium has also been
linked to typhoid like disease in mice (Kaufman et
al., 2001). For the purposes of this review, the
gastroenteritis form of disease caused by S.