The investigation into a cryptosporidium outbreak in Queenstown has moved focus away from the town's water supply.
Confirmed cases of cryptosporidium in Queenstown are now at 30, with a further 16 under investigation.
Authorities are still trying to discover the source and how the infection spread.
Mayor Glyn Lewers says CBD businesses are now the focus of the investigation.
Southern medical officer of health Susan Jack spoke to Corin Dann.