A skin disease of an infectious nature often found in schools and caused by the [Staphylococcus aureus] bacterium. It consists of vesicles which appear here and there, on the face particularly, leaving scabs from which the discharge is infectious. The scabs fall off, leaving no scars. There are various forms of treatment using lotions or ointments. When nits are present on the hair, treatment in ineffective until these have been removed.