Australian health authorities say they are struggling to explain why gastroenteritis case numbers have reached a 20-year high.
However, it is the increasing number of gastro patients presenting with cryptosporidiosis that has health authorities more concerned.
Cryptosporidiosis is commonly transmitted by bodies of water and through faecal matter, and symptoms include fever, nausea, vomiting, headaches and sweating.
The Federal health department states that 64 per cent of cases in the year-to-date, were recorded in children under the age of five.
Dr Elizabeth Elliott AM, from the University of Sydney and Westmead’s Children’s Hospital, said tracing the surge in cases was problematic and that the data was concerning.
She added it was important to take preventative steps in stopping young children getting gastro, by maintaining hygiene practices, and for children to stay home when they have signs of the illness.