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. 2022 Apr 4;14(2):55–59. doi: 10.4103/ijt.ijt_157_20

Table 2.

Symptoms associated with head lice infestation before and after treatment with 0.5% topical ivermectin shampoo

Score Before treatment Day 0 After treatment

Day 7 Day 14 Day 22
1. Pruritis
 0=Absent 6 (3.1) 143 (73) 167 (85.2) 190 (96.9)
 1=Light 53 (27.0) 38 (19.4) 20 (10.2) 6 (3.1)
 2=Moderate 48 (24.5) 12 (6.1) 6 (3.1) 0
 3=Severe 89 (45.4) 3 (1.5) 3 (1.5) 0
2. Scalp dryness
 0=Absent 132 (67.3) 179 (91.4) 170 (86.7) 185 (94.4)
 1=Light 36 (18.4) 12 (6.1) 13 (6.6) 7 (3.6)
 2=Moderate 15 (7.7) 3 (1.5) 6 (3.1) 4 (2.0)
 3=Severe 13 (6.6) 2 (1.0) 7 (3.6) 0
3. Redness
 0=Absent 194 (99) 195 (99.5) 194 (99) 196 (100)
 1=Light 1 (0.5) 1 (0.5) 0 0
 2=Moderate 0 0 1 (0.5) 0
 3=Severe 1 (0.5) 0 1 (0.5) 0