Table 1.

Criteria for assigning county-level schistosomiasis transmission status

Transmission status	Criteria
Infection control	Human infection prevalence <5%
	Bovine infection prevalence <5%
	<10 acute cases over 2 week period in a village
Transmission control	Human infection prevalence <1%
	Bovine infection prevalence <1%
	No acute cases
	No infected snails (O. hupensis) for two consecutive years
Transmission interruption	No human cases for five consecutive years
	No bovine cases for five consecutive years
	No snails (O. hupensis) for two consecutive years
Elimination	No new infection in humans or bovines for five years after reaching transmission interruption

Note: All criteria are evaluated at the administrative village-level.