Acute post-streptococcal glomemlonephritis (APSGN) is an inflammatory disease of the kidneys which occurs 2 to 3 weeks after skin or throat infection with a particular type of bacteria called group A streptococcus (GAS), or occasionally groups C or G streptococcus. In the Northern Territory (NT) most cases follow skin rather than throat infections because skin infections are the more common problem. Not all types of streptococcus cause kidney problems but only those caused by "nephritogenic" strains.