MEDICAL ENTOMOLOGY – QUARTERLY REPORT FOR SOUTH METRO JUL - SEP 2019

Data reflected in this summary of mosquito-borne disease in the South Metro Region is taken from the Notifiable Infectious Disease Database (WANIDD) and includes enhanced surveillance data collected by Population Health Units and Local Governments. (Only locations with notified cases of disease are shown in tables and figures).

Ross River virus (RRV) Barmah Forest virus (BFV) One BFV case was reported by lab only. No 24 RRV cases were notified by lab, including 5 that were also RRV 2019 ctd Jul Aug Sep Total notified by doctor. No follow up data are available. The follow up data are available. The long term SW - 4 5 4 13 number of RRV cases has been significantly below the long mean for BFV cases in the South Metro region term mean for the past 12 months. (C) 3 1 3 7 is up to one case per month. COODANUP 1 1 RRV 2019 Jul Aug Sep Total DUDLEY PARK 1 1 Metro 3 3 5 11 ERSKINE 1 1 BFV 2019 Jul Aug Sep Total Fremantle (C) 1 1 GREENFIELDS 1 1 Metro 1 1 FREMANTLE 1 1 MANDURAH 1 1 Kwinana (C) 1 1 Gosnells (C) 2 2 4 MEADOW SPRINGS 1 1 WANDI 1 1 CANNING VALE 1 1 WANNANUP 1 1 Total 1 1 HUNTINGDALE 1 1 2 Murray (S) 1 1 2 LANGFORD 1 1 NORTH YUNDERUP 1 1 Melville (C) 1 1 SOUTH YUNDERUP 1 1 BOORAGOON 1 1 Rockingham (C) 2 1 3 Victoria Park (T) 1 1 2 EAST VICTORIA PARK 1 1 2 ROCKINGHAM 1 1 Kwinana (C) 1 1 1 3 WAIKIKI 2 2 CASUARINA 1 1 Serpentine-Jarrahdale (S) 1 1 ORELIA 1 1 BYFORD 1 1 WANDI 1 1 Total 7 8 9 24

1 MEDICAL ENTOMOLOGY – QUARTERLY REPORT FOR WESTERN AUSTRALIA JUL - SEP 2019

Data reflected in this summary of mosquito-borne disease in the East Metro Region is taken from the Western Australia Notifiable Infectious Disease Database (WANIDD) and includes enhanced surveillance data collected by Population Health Units and Local Governments. (Only locations with notified cases of disease are shown in tables and figures).

Relative Rainfall Jun - Aug (Winter) 2019

Relative Rainfall Sep 2019

2 MEDICAL ENTOMOLOGY – CLIMATE OUTLOOK FOR WESTERN AUSTRALIA OCT - DEC 2019

El Niño–Southern Oscillation (ENSO) weather forecast based on Australian BOM Climate Outlook interaction between the atmosphere and tropical Pacific Ocean. Can be El Nino issued 26 September 2019 or La Nina. El Niño conditions are associated with a decrease in rainfall and tidal Rainfall is likely to be drier across activity, generally drier conditions. most of the country during October La Niña brings wetter, cooler days and warmer nights (due to increased to January. However, for northwest cloud cover) conducive to mosquito breeding and mosquito borne diseases. WA, there are slightly increased Positive Indian Ocean Dipole brings below average winter–spring chances of above average rainfall rainfall, and above average temperatures. from October to December .

Australian Bureau of International Research Institute for Meteorology (BOM) ENSO Climate and society IRI ENSO issued 1 October 2019 Forecast issued 12 September 2019 Warmer end to the year very likely.

ENSO Alert Status is Not Active. ENSO remains neutral and ENSO-neutral is favoured during Sep – the positive Indian Ocean Nov 2019 and expected to continue Dipole has strengthened. through to March/autumn 2020. Daytime temperatures are very likely to be warmer than average for virtually all of Australia for the It is likely to persist through remainder of 2019 and early 2020. to the end of spring, being the dominant climate driver for Australia's weather for much of the rest of 2019.

Warmer than average nights during For further information contact Medical Entomology October to December. PO Box 8172, Business Centre WA 6849 Phone: (08) 9285 5500 Fax: (08) 9383 1819 Email: [email protected] 3