More than 50 people have fallen ill with gastroenteritis at Tangalooma Island Resort on Moreton Island, and investigators say the resort’s contaminated drinking water is to blame.

Metro South Health public health physician Dr Kari Jarvinen said people who have recently visited the resort should stay alert for symptoms and seek medical advice if necessary.

Dr Jarvinen said, “Gastro caused by bacteria can give you nausea, vomiting, stomach cramps, diarrhoea … and fever.”