Table 4: Minimum infective doses for selected microorganisms.

MicroorganismMinimum infective dose (number of organisms)Source

Helminth100 to 101Andreoli et al., 2007 [55]
Salmonella spp.104 to 107Mara and Horan, 2003 [56]
Salmonella typhi10Mara and Horan, 2003 [56]
E. coli 0157:H710 to 102Mara and Horan, 2003 [56]