This figure shows notifications of legionellosis in Australia from 2007 to 2011 by month of diagnosis and species. This figure demonstrates seasonal pattern of L. longbeachae in 2012 was similar to the peaks in notifications experienced in the previous 5 years. However, in 2012 the seasonal peak of L. pneumophila differed, with the majority of cases diagnosed in the summer months in 2012 compared with the autumn months of the previous 5 years