Estimating the Health Risk Associated with the Use of Ecological Sanitation Toilets in Malawi

Table 4

Minimum infective doses for selected microorganisms.

Microorganism	Minimum infective dose (number of organisms)	Source
Helminth	10^0 to 10^1	Andreoli et al., 2007 [55]
Salmonella spp.	10^4 to 10^7	Mara and Horan, 2003 [56]
Salmonella typhi	10	Mara and Horan, 2003 [56]
E. coli 0157:H7	10 to 10^2	Mara and Horan, 2003 [56]