Figure 3. Timeline of data collection activities and larviciding intervention.

The first survey round was conducted form 05/2004 to 09/2004, the second from 10/2004 to 08/2005, the third from 09/2005 to 05/2006, the fourth from 06/2006 to 03/2007, the fifth from 04/2007 to 11/2007, and the sixth and last survey round from 01/2008 to 12/2008. The first period of the intervention started on March 1^st 2006, the second period of larviciding on May 1^st 2007, and the last period of larviciding on April 1^st 2008.