Authorities insist an investigation into the suspected source of an outbreak of illness is continuing, contrary to claims that a Fife farm shop and cafe has been cleared.
Muddy Boots, at Balmalcolm, has been linked to 16 cases of cryptosporidiosis confirmed since the middle of April.
The farm and activity centre, which is a popular destination with families, said tests conducted by environmental health officers had failed to find evidence of the cryptosporidium bug which causes the vomiting and diarrhoea sickness.
But Fife Council and NHS Fife said on Friday that their inspection of the premises was ongoing.
Treina Samson, of Muddy Boots, said: “All the tests they conducted have come back negative. They are not willing to clear us or back track.”
According to the council and health authority, the majority of sufferers had visited Muddy Boots over the Easter holidays.
Council service manager for food and workplace safety Lisa McCann said: “We are working in close co-operation with Muddy Boots Farm as we continue our investigation.
“Although the exact source of the infection is unclear, additional cleaning and controls have been put in place.
“As part of the ongoing investigation a number of water samples in relation to one piece of play equipment were taken, the results were negative. Further investigations and inspections are ongoing.”
A reminder was issued to people to wash their hands with soap and water after visiting farms and the countryside, even after using alcohol gels.