Table 3.

Transition matrix of Loa loa microfilarial density in 2015 (left column) versus that in 2017 (top row), in individuals not treated with ivermectin in 2015

	0	1–100	101–500	501–2000	2001–10 000	10 000–20 000	>20 000	Total
0	109	0	6	2	1	0	0	118
1–100	0	0	0	0	0	0	0	0
101–500	6	0	1	2	3	1	0	13
501–2000	1	0	1	2	3	1	0	8
2001–10 000	0	0	0	3	8	0	0	11
10 001–20 000	0	0	0	0	3	2	2	6
>20 000	2	0	0	3	19	29	81	134
Total	118	0	8	12	37	33	83	291

Data are the number of individuals not treated with ivermectin in 2015 within each recorded range of microfiliarial density (in microfilariae per mL) in 2015 versus that in 2017.