Active head lice infestation Infections and Infestations Pediculosis and phthiriasis
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1. Children aged 5 - 15 years, either sex 2. Absence of active head lice infestation determined by diagnostic wet-combing 3. Written consent obtained from the study participants and carers
Exclusion criteria
Exclusion criteria: 1. Active head lice infestation during baseline examination (defined as the detection of at least one viable head louse or nymph after vigorous wet-combing) 2. Absence from the study area for more than a week 3. Unwillingess to participate in the study
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The median infestation-free period, defined as the days between baseline and the first head lice positive examination during follow-up visits. A positive head lice examination was defined as the detection of at least one viable head louse or nymph determined by diagnostic wet-combing. | — |
Secondary
| Measure | Time frame |
|---|---|
| Analyses on individual characteristics (sex, hair length and type) and characteristics of the households (poverty, crowding) were done to measure their importance for infestation-free periods. The annual incidence was calculated/estimated. | — |
Countries
Brazil