REPOST: Victoria | Update: Outbreak of Cryptosporidiosis extends to regional Victoria

As gastroenteritis (cryptosporidiosis) outbreak in Melbourne rises four-fold, hygiene measures at pools and other facilities are strongly encouraged.

This article tells more about cryptosporidiosis including its transmission and symptoms.  


The Department is investigating a four-fold increase in Cryptosporidium notifications since January 2013.

Many cases are reporting exposure to swimming pools in their incubation periods, and other settings representing a risk for onwards transmission are households and childcare facilities.

Cryptosporidiosis is a parasitic disease that most commonly causes gastroenteritis. Since January 2013, there has been a substantial increase in Cryptosporidium notifications, While initially focussed on metropolitan Melbourne, an increase in notifications is now affecting regional Victoria.

The organism lasts for long periods in water and the environment and is not destroyed by regular chlorination.

In this outbreak there appears to be a role for transmission related to swimming pools and the key priority is the identification and prevention of further cases through hygiene measures at pools, childcare facilities and in household settings where there are cases. The Department is working with pool managers to ensure effective measures are in place to address the issue.

Whilst all people are susceptible to becoming infected, certain groups are more likely to become seriously ill including younger children, pregnant women and individuals with weakened immune systems.

The most common presentation is gastroenteritis, with symptoms including watery diarrhoea, cramping abdominal pain, bloating, vomiting and fever. Less commonly, Cryptosporidium infection can present as pneumonia, cholecystitis or pancreatitis.

After exposure it can take up to 12 days to develop symptoms, which then last between 4 to 21 days. Individuals are potentially infectious from the onset of symptoms until two weeks after becoming asymptomatic.

Transmission occurs by the faecal-oral route (person to person and animal to person), and via ingestion of contaminated water or foods.

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