Sand ? room temp < 4 months
Soil Moist Dense shade . .9-11 weeks
Sunlight 5-10 days
Soil Water covered varied 10-43 days
16 14-17.5 weeks
27 9-11 weeks
HOOKWORM OVA (EGGS)
Heated soil with water covered 15-27 9% after 2wks night soil
Unheated soil with water covered 15-27 3% after 2wks night soil
Soil irrigated w/sewage ? less than 2.5 yrs.
Source: Feachem et al., 1980; d.=days; <=less than Table 7.13
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