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Fine-temporal forecasting of outbreak probability and severity: Ross River virus in Western Australia

journal contribution
posted on 2023-05-19, 12:40 authored by Iain Koolhof, Silvana BettiolSilvana Bettiol, Scott CarverScott Carver
Health warnings of mosquito-borne disease risk require forecasts that are accurate at fine-temporal resolutions (weekly scales); however, most forecasting is coarse (monthly). We use environmental and Ross River virus (RRV) surveillance to predict weekly outbreak probabilities and incidence spanning tropical, semi-arid, and Mediterranean regions of Western Australia (1991-2014). Hurdle and linear models were used to predict outbreak probabilities and incidence respectively, using time-lagged environmental variables. Forecast accuracy was assessed by model fit and cross-validation. Residual RRV notification data were also examined against mitigation expenditure for one site, Mandurah 2007-2014. Models were predictive of RRV activity, except at one site (Capel). Minimum temperature was an important predictor of RRV outbreaks and incidence at all predicted sites. Precipitation was more likely to cause outbreaks and greater incidence among tropical and semi-arid sites. While variable, mitigation expenditure coincided positively with increased RRV incidence (r 2 = 0·21). Our research demonstrates capacity to accurately predict mosquito-borne disease outbreaks and incidence at fine-temporal resolutions. We apply our findings, developing a user-friendly tool enabling managers to easily adopt this research to forecast region-specific RRV outbreaks and incidence. Approaches here may be of value to fine-scale forecasting of RRV in other areas of Australia, and other mosquito-borne diseases.


Publication title

Epidemiology and Infection










College Office - College of Sciences and Engineering


Cambridge Univ Press

Place of publication

United States

Rights statement

© Cambridge University Press 2017

Repository Status

  • Restricted

Socio-economic Objectives

Disease distribution and transmission (incl. surveillance and response)

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