Australia's notifiable disease status, 2011: annual report of the National Notifiable Diseases Surveillance System.

In 2011, 65 diseases and conditions were nationally notifiable in Australia. States and territories reported a total of 238,158 notifications of communicable diseases to the National Notifiable Diseases Surveillance System, an increase of 14% on the number of notifications in 2010. This increase was largely due to the ongoing pertussis epidemic and higher than usual inter-season notifications of influenza. In 2011, the most frequently notified diseases were sexually transmissible infections (95,456 notifications, 40.1% of total notifications), vaccine preventable diseases (81,872 notifications, 34.4% of total notifications), and gastrointestinal diseases (32,784 notifications, 13.8% of total notifications). There were 17,123 notifications of bloodborne diseases; 8,306 notifications of vectorborne diseases; 1,928 notifications of other bacterial infections; 681 notifications of zoonoses and 8 notifications of quarantinable diseases.