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Trop. Med. Infect. Dis. 2018, 3(1), 9; https://doi.org/10.3390/tropicalmed3010009

The Rise of Imported Dengue Infections in Victoria, Australia, 2010–2016

1
Communicable Disease Epidemiology and Surveillance, Department of Health and Human Services, 3000 Melbourne, Australia
2
Victorian Infectious Diseases Service, Royal Melbourne Hospital, Melbourne Health, 3050 Melbourne, Australia
3
Peter Doherty Institute, University of Melbourne, 3010 Melbourne, Australia
4
Disease Elimination Program, Burnet Institute, 3004 Melbourne, Australia
*
Author to whom correspondence should be addressed.
Received: 14 November 2017 / Revised: 19 December 2017 / Accepted: 3 January 2018 / Published: 21 January 2018
(This article belongs to the Special Issue Epidemiology of Dengue: Past, Present and Future)
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Abstract

Dengue notifications have increased dramatically over the past seven years in Victoria, Australia—a trend which has been seen nationally and reflects increased cases internationally. We reviewed the epidemiology of dengue among Victorian travellers, changes in diagnostic methods and describe the burden placed on local health systems resulting from this disease of public health importance. Cases of dengue notified to the Department of Health and Human Services in Victoria, Australia, between 1 January 2010 and 31 December 2016 were included in this review. Demographic, clinical, diagnostic methods, and risk factor data were examined using descriptive epidemiological analyses. Cases of dengue increased on average by 22% per year, with a total of 2187 cases (5.5 cases/100,000 population) notified over the 7-year reporting period. The most frequently reported country of acquisition was Indonesia (45%) followed by Thailand (14%). The use of multiple diagnostic methods, including the non-structural protein 1 antigen (NS1Ag) detection test, increased over time. The median time between onset of illness and diagnosis diminished from 9 days (IQR: 2–15) in 2010 to 4 days (IQR: 2–7) in 2016. Proportionally more cases were discharged directly from emergency departments in recent years (10% in 2010 to 28% in 2016, p < 0.001).The increasing incidence of dengue in Australia is reflective of its growing prominence as a travel medicine problem in western countries. For travellers with non-severe dengue, the improved timeliness of dengue diagnostics allows for consideration of best practice ambulatory management approaches as used in endemic areas. View Full-Text
Keywords: dengue; travel; epidemiology; healthcare dengue; travel; epidemiology; healthcare
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Rowe, S.L.; Thevarajan, I.; Richards, J.; Gibney, K.; Simmons, C.P. The Rise of Imported Dengue Infections in Victoria, Australia, 2010–2016. Trop. Med. Infect. Dis. 2018, 3, 9.

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