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Table 1 Criteria for assigning county-level schistosomiasis transmission status

From: Surveillance systems for neglected tropical diseases: global lessons from China’s evolving schistosomiasis reporting systems, 1949–2014

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