Mosquito and mosquito-borne disease surveillance report

The department coordinates mosquito surveillance through the Victorian Arbovirus Disease Control Program (VADCP) in conjunction with participating Local Government Areas (LGAs) that are considered to be at high-risk for mosquito-borne diseases.

Mosquito surveillance includes trapping mosquitoes on a weekly basis throughout the mosquito season. This is typically November to April each year. Trapped mosquitoes are sent to the Agriculture Victoria Research (AVR) laboratory for species identification, counting and testing for viruses of public health significance.

The surveillance reports for the 2025/26 mosquito season start 5 November 2025.

The surveillance report

The report presents data on mosquito surveillance and notified cases of human mosquito-borne diseases in Victoria.

It contains a range of indicators actively monitored by the department. The indicators used in these reports are sourced from the following surveillance systems:

Mosquito surveillance (adult mosquitoes)
Human surveillance (notified confirmed and probable cases of mosquito-borne disease). Human case data is related to notifications from medical practitioners and laboratories and may not always reflect the current rate of mosquito-borne diseases.
This report is updated weekly with information collected for the week prior, noting there can be a time delay from mosquito field collection to reporting.

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For more information

We are continually improving the user experience for everyone, and applying the relevant accessibility standards. Should you experience any difficulty in accessing the Power BI report or require more information, please contact us at infectious.diseases@health.vic.gov.au.