Lymphatic Filariasis Transmission Assessment Survey

Lymphatic Filariasis Transmission Assessment Survey

The Transmission Assessment Survey (TAS) for lymphatic filariasis is conducted to determine whether infection has been reduced to levels below which transmission is no longer sustainable, allowing for a decision to stop mass drug administration (MDA). The same strategy is also used for surveillance after stopping MDA to ensure that recrudescence is not occurring.  These WHO guidelines are available in both French and English.