Victorians have been advised to avoid public swimming pools for at least two weeks after experiencing diarrhoea, as cryptosporidiosis cases continue to rise. The Department of Health has reported 87 cases so far this year, surpassing the five-year average.
The previous year saw a significant increase, with 2,349 reported cases—a 233% jump from the year before. While chlorine is generally effective in treating public pools, the cryptosporidium parasite is highly resistant to standard chlorine levels, creating a persistent risk.
Health officials stress that individuals remain contagious for weeks after symptoms subside. To minimise the spread, people are urged to stay out of pools for two weeks post-symptoms, shower with soap before swimming, and avoid swallowing pool water. Medical consultation is recommended for those who suspect an infection.
Symptoms of cryptosporidiosis include watery diarrhoea, stomach cramps, fever, vomiting, and appetite loss. The infection is transmitted through contaminated water, food, or surfaces exposed to infected faeces, making public pools a primary concern.
The increase in cases aligns with record immigration levels over the past two years, with a notable rise in arrivals from countries with differing public health standards. According to the Australian Bureau of Statistics, the largest immigrant groups in the last financial year were from India, China, and the Philippines, with 87,600, 75,830, and 36,830 arrivals respectively.
The growing immigrant population has also been reflected in drowning statistics, with overseas-born individuals accounting for 34% of recent drowning deaths. Authorities are addressing both health and safety concerns as they respond to the challenges of population growth and diversity.
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