Figure 2

Salmonella Enteritidis colonization of the cecum, liver and spleen after oral infection at the day of hatching. The cecum (triangles) was colonized as early as at the first sampling time, 24 h after the infection. Colonization of the liver (circles) and spleen (squares) required an additional 24 h and these organs became highly colonized from 48 h after the infection. The liver and spleen remained colonized at constant counts until day 12 of life and thereafter a gradual decrease in Salmonella Enteritidis counts was observed.