Bayesian Spatiotemporal Analysis of Socio-Ecologic Drivers of Ross River Virus Transmission in Queensland, Australia

Wenbiao Hu School of Population Health, The University of Queensland, Queensland, Australia; Australian Centre for International and Tropical Health, Queensland Institute of Medical Research, Queensland, Australia; School of Public Health, Queensland University of Technology, Queensland, Australia; School of Mathematical Sciences, Queensland University of Technology, Queensland, Australia

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Archie Clements School of Population Health, The University of Queensland, Queensland, Australia; Australian Centre for International and Tropical Health, Queensland Institute of Medical Research, Queensland, Australia; School of Public Health, Queensland University of Technology, Queensland, Australia; School of Mathematical Sciences, Queensland University of Technology, Queensland, Australia

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Gail Williams School of Population Health, The University of Queensland, Queensland, Australia; Australian Centre for International and Tropical Health, Queensland Institute of Medical Research, Queensland, Australia; School of Public Health, Queensland University of Technology, Queensland, Australia; School of Mathematical Sciences, Queensland University of Technology, Queensland, Australia

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Shilu Tong School of Population Health, The University of Queensland, Queensland, Australia; Australian Centre for International and Tropical Health, Queensland Institute of Medical Research, Queensland, Australia; School of Public Health, Queensland University of Technology, Queensland, Australia; School of Mathematical Sciences, Queensland University of Technology, Queensland, Australia

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Kerrie Mengersen School of Population Health, The University of Queensland, Queensland, Australia; Australian Centre for International and Tropical Health, Queensland Institute of Medical Research, Queensland, Australia; School of Public Health, Queensland University of Technology, Queensland, Australia; School of Mathematical Sciences, Queensland University of Technology, Queensland, Australia

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This study aims to examine the impact of socio-ecologic factors on the transmission of Ross River virus (RRV) infection and to identify areas prone to social and ecologic-driven epidemics in Queensland, Australia. We used a Bayesian spatiotemporal conditional autoregressive model to quantify the relationship between monthly variation of RRV incidence and socio-ecologic factors and to determine spatiotemporal patterns. Our results show that the average increase in monthly RRV incidence was 2.4% (95% credible interval (CrI): 0.1–4.5%) and 2.0% (95% CrI: 1.6–2.3%) for a 1°C increase in monthly average maximum temperature and a 10 mm increase in monthly average rainfall, respectively. A significant spatiotemporal variation and interactive effect between temperature and rainfall on RRV incidence were found. No association between Socio-economic Index for Areas (SEIFA) and RRV was observed. The transmission of RRV in Queensland, Australia appeared to be primarily driven by ecologic variables rather than social factors.

Author Notes

*Address correspondence to Wenbiao Hu, School of Population Health, The University of Queensland, Herston Road, Herston, Queensland 4006, Australia. E-mail: w.hu@sph.uq.edu.au

Financial support: National Health and Medical Research Council, Australia (no. 519788)

Authors' addresses: Wenbiao Hu and Gail Williams, School of Population Health, The University of Queensland, Queensland, Australia, E-mails: w.hu@sph.uq.edu.au and g.willims@sph.uq.edu.au. Archie Clements, School of Population Health, The University of Queensland, Queensland, Australia and Australian Centre for International and Tropical Health, Queensland Institute of Medical Research, Queensland, Australia, E-mail: a.clements@sph.uq.edu.au. Shilu Tong, School of Public Health, Queensland University of Technology, Queensland, Australia, E-mail: s.tong@qut.edu.au. Kerrie Mengersen, School of Mathematical Sciences, Queensland University of Technology, Queensland, Australia, E-mail: k.mengersen@qut.edu.au.

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