Ross River Virus – Mosquito Control Program

Published on Monday, 14 December 2020 at 9:00:00 AM

There has been an increase in Ross River Virus (RRV) cases across WA, with an additional 33 cases between 7 and 14 December, bringing the year-to-date figure to 239. 

According to the Bureau of Meteorology, all atmospheric variables are consistent with La Nina conditions, which are likely to peak in the first quarter of 2021.  La Nina conditions generally result in above average rainfall across Australia, warmer overnight temperatures, greater tropical cyclone numbers and an earlier monsoon onset. The last La Nina events were in 2010 to 2011 and 2011 to 2012.  The successive La Nina events resulted in the highest cases of RRV for the East Swan River region.

The recent rainfall and increased tidal activity combined with the warm weather is likely to result in high mosquito activity over the coming months.   The Town will continue to monitor and treat known mosquito breeding sites and drains throughout the Town, however, it is important to ensure precautions are taken to avoid mosquito bites, i.e. use of effective repellents, avoiding outdoor areas at dawn and early evening, removing water holding containers and using mosquito coils or lanterns and barrier sprays.   More information regarding the Town’s Mosquito Monitoring and Control Program can be found here.

Town of Bassendean Public Health Pest Page

The Town will continue to provide updates,  in line with Department of Health advice.

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