Ivermectin Therapy for Scabies Infection in Children Younger Than 5 Years of Age (ITCHY Study)

"ITCHY Study:~All participants will receive one dose of oral ivermectin 3mg on day 0 and have two blood samples taken to determine the serum ivermectin concentrations after the dose. Timing of blood samples will vary depending on the allocated group.~ITCHY2 Study:~Participants will receive one age-specific dose of oral ivermectin on day 0 and have two blood samples taken to determine the serum ivermectin concentrations after the dose. Timing of blood samples will vary depending on the allocated group.~Age specific ivermectin dose:~* 0.75mg of ivermectin will be given to participants aged 3 to 7 months~* 1.5mg of ivermectin will be given to participants aged 8 to 12 months~* 3mg of ivermectin will be given to participants aged 13 to 24 months"