Table 2. Evolution of Onchocerca volvulus microfilarial density after ivermectin treatment in ivermectin-naïve and multiply treated subjects.

	From D0 to D15		From D15 to D80		From D80 to D180
Percentage of subjects whose microfilarial density:	Ivermectin-naïve	Multiply treated	Ivermectin- naïve	Multiply treated	Ivermectin- naïve	Multiply treated
- increased	0	0	26.7	38.7	66.9	74.8
- decreased	100	100	22.1	11.3	0.9	2.1
- levelled off*	-	-	51.2	50.0	32.2	23.1

^*all individuals in this category presented with no detectable skin microfilariae.