inflammatory skin infection that begins as a superficial blister or pustule that then ruptures and gives rise to a weeping spot on which the fluid dries to form a distinct honey-coloured crust. Impetigo is caused by staphylococcus or Streptococcus bacteria. It is seldom contagious in adults, a little more so in children, and very contagious in newborn infants. Impetigo is the most common skin infection among children (childhood disease and disorder). It is spread by poor hygiene and crowding and is a particular problem in humid, hot weather. Impetigo is generally diagnosed by observation. In mild cases the lesions can be effectively treated with an antibiotic ointment; in more extensive involvement, especially in children, an oral antibiotic may be advisable.