. A, Very dense papular
dermatitis on the shoulder of a 10-year-old boy on day 6 after ivermectin. Only 10 papules were on the thorax before
treatment. Skin snip negative before treatment, but microfilariae (mf) were detected in histological sections (see Figure 3A
and B). B, Scattered papular dermatitis on right thorax of a 9-year-old girl on day 6 after ivermectin. No lesions before
treatment, beginning of dermatitis on day 4 after treatment, skin snips negative before treatment. C, Scattered papular
dermatitis on the left hand (and on abdomen) of a 40-year-old man on day 5 after ivermectin. No lesions before treatment,
beginning of skin reaction on day 2 after treatment, skin snips 0.9 mf/mg before therapy. D, Fine papular dermatitis on right
thorax (arrow head) and two larger papules (arrows) that may indicate the localization of adult filaria. These papules had
not been recorded before treatment. 38-year-old man on day 5 after ivermectin. No skin lesions before treatment, skin snips
1.0 mf/mg before therapy