Managing a cluster of cryptosporidiosis associated with a public swimming pool.

Between 10 May and 20 June 2005, Sydney West Centre for Population Health (SWCPH) was notified of 29 cases of cryptosporidiosis. SWCPH staff interviewed these cases about their potential sources of exposure to infection and found that 11 (38 per cent) swam at the same indoor heated public pool. The onset of illness in these 11 cases ranged from late April to early June. Nine of these cases were children, six of whom were aged three years and under. Six of the eleven cases also reported other potential sources of infection, including contact with relatives who had diarrhoeal illness, contact with pets, and attendance at a childcare centre or play group.