Table 1.

Calendar of the baseline and follow-up impact assessments carried out in Naicioná, Colombia

Component	Baseline assessment	First impact assessment	Second impact assessment	Third impact assessment	Fourth impact assessment
Parasitology	1995	1998	2001	2004	2007
Ophthalmology	1996	1998	2001	2006	No
Entomology	1996	1998	2001	2004	2010a
Serology	No	No	2001	2004	2007

^aThe entomological assessment in 2010 was done to confirm the interruption of transmission at the end of the 3-year post-treatment surveillance period