Environmental and entomological factors determining Ross River virus activity in the River Murray Valley of South Australia

Williams, Craig R.; Fricker, Stephen; Kokkinn, M. J.

doi:10.1111/j.1753-6405.2009.00390.x

Cited by 35 publications

(46 citation statements)

References 18 publications

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“…Mosquito surveillance is regularly conducted in South Australia as an indicator for arbovirus risk along the River Murray (Williams et al 2009a) and coastal suburbs of Adelaide (Williams et al 2009b). In the current study, additional traps were deployed in metropolitan Adelaide and the Adelaide Hills to improve our spatial resolution.…”

Section: Methodsmentioning

confidence: 99%

“…globocoxitus and Cx. australicus have been implicated in RRV outbreaks, but neither has been tested for vector competence in a laboratory (Dhileepan et al 1996, Williams et al 2009a. Cx.…”

Section: Mosquitoes Associated With Virusmentioning

confidence: 99%

“…Previous studies analyzing human cases of RRV in South Australia have suggested it is mainly a problem of endemic regions bordering the Murray River where the virus circulates annually at low rates (Mudge et al 1980, Mudge 1977, Weinstein et al 1994, Horwood and Bi 2005, Bi et al 2009). Models have been developed to help predict when arbovirus infection risk will be highest along the River Murray (Bi et al 2009, Williams et al 2009a), but we do not know how infectious mosquito prevalence and human risk vary outside the Murray River basin.…”

Section: Introductionmentioning

confidence: 99%

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Converting Mosquito Surveillance to Arbovirus Surveillance with Honey-Baited Nucleic Acid Preservation Cards

Flies

Toi

Weinstein

et al. 2015

Vector-Borne and Zoonotic Diseases

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Spatially and temporally accurate information about infectious mosquito distribution allows for pre-emptive public health interventions that can reduce the burden of mosquito-borne infections on human populations. However, the labile nature of arboviruses, the low prevalence of infection in mosquitoes, the expensive labor costs for mosquito identification and sorting, and the specialized equipment required for arbovirus testing can obstruct arbovirus surveillance efforts. The recently developed techniques of testing mosquito expectorate using honey-baited nucleic acid preservation cards or sugar bait stations allows a sensitive method of testing for infectious, rather than infected, mosquito vectors. Here we report the results from the first large-scale incorporation of honey-baited cards into an existing mosquito surveillance program. During 4 months of the peak virus season (January-April, 2014) for a total of 577 trap nights, we set CO2-baited encephalitis vector survey (EVS) light traps at 88 locations in South Australia. The collection container for the EVS trap was modified to allow for the placement of a honey-baited nucleic acid preservation card (FTA™ card) inside. After collection, mosquitoes were maintained in a humid environment and allowed access to the cards for 1 week. Cards were then analyzed for common endemic Australian arboviruses using a nested RT-PCR. Eighteen virus detections, including 11 Ross River virus, four Barmah Forest virus, and three Stratford virus (not previously reported from South Australia) were obtained. Our findings suggest that adding FTA cards to an existing mosquito surveillance program is a rapid and efficient way of detecting infectious mosquitoes with high spatial resolution.

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Section: Methodsmentioning

confidence: 99%

“…globocoxitus and Cx. australicus have been implicated in RRV outbreaks, but neither has been tested for vector competence in a laboratory (Dhileepan et al 1996, Williams et al 2009a. Cx.…”

Section: Mosquitoes Associated With Virusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Converting Mosquito Surveillance to Arbovirus Surveillance with Honey-Baited Nucleic Acid Preservation Cards

Flies

Toi

Weinstein

et al. 2015

Vector-Borne and Zoonotic Diseases

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“…However, models require maintenance, collecting, cleaning, and imputing of data, as well as staff training. The South Australianbased RRForcastor requires the input of the predicted rainfall using Bureau of Meteorology three monthly outlooks for the preceding 3 mo as a proportion of the historic mean for each region (Williams et al 2007(Williams et al , 2009. Queensland Health has introduced the VectorBorne Disease Early Detection and Surveillance System, designed to provide public health ofÞcials (secure log-in required) with decision-support tool to assist with the management of mosquito-borne disease.…”

mentioning

confidence: 99%

Arbovirus Models to Provide Practical Management Tools for Mosquito Control and Disease Prevention in the Northern Territory, Australia

Jacups¹,

Whelan²,

Harley³

2011

jnl. med. entom.

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Ross River virus (RRV) causes the most common human arbovirus disease in Australia. Although the disease is nonfatal, the associated arthritis and postinfection fatigue can be debilitating for many months, impacting on workforce participation. We sought to create an early-warning system to notify of approaching RRV disease outbreak conditions for major townships in the Northern Territory. By applying a logistic regression model to meteorologic factors, including rainfall, a postestimation analysis of sensitivity and specificity can create rainfall cut-points. These rainfall cut-points indicate the rainfall level above which previous epidemic conditions have occurred. Furthermore, rainfall cut-points indirectly adjust for vertebrate host data from the agile wallaby (Macropus agilis) as the life cycle of the agile wallaby is intricately meshed with the wet season. Once generated, cut-points can thus be used prospectively to allow timely implementation of larval survey and control measures and public health warnings to preemptively reduce RRV disease incidence. Cut-points are location specific and have the capacity to replace previously used models, which require data management and input, and rarely provide timely notification for vector control requirements and public health warnings. These methods can be adapted for use elsewhere.

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“…Other mosquitoes, such as A. camptorhynchus and Culex annulirostris, are also considered to act as main vectors [5].Various models have been developed to predict RRV outbreaks, but these depend on local ecological factors and are mostly only regionally valid [1]. Rainfall was often a signiWcant predictor of RRV activity [7]. Alterations in transmission of vector-borne zoonoses are often linked to environmental change.…”

mentioning

confidence: 99%

Ross River virus infection in a traveller returning from northern Australia

Tappe

Schmidt‐Chanasit

Ries

et al. 2009

Med Microbiol Immunol

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Ross River virus is an arthropod-borne alphavirus (family Togaviridae) causing epidemic polyarthritis in the Australia-Pacific region. The infection causes substantial morbidity due to long-lasting arthralgia. Despite being the most common arboviral infection in Australia, reports in travellers are scarce. Here, we describe the disease in a German traveller who was not aware of the prevalence of this infection in his holiday destination, the Northern Territory and Queensland, Australia. The patient had neither fever nor rash, but presented with chills, watery diarrhoea and severe, prolonged arthritis.

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Environmental and entomological factors determining Ross River virus activity in the River Murray Valley of South Australia

Cited by 35 publications

References 18 publications

Converting Mosquito Surveillance to Arbovirus Surveillance with Honey-Baited Nucleic Acid Preservation Cards

Converting Mosquito Surveillance to Arbovirus Surveillance with Honey-Baited Nucleic Acid Preservation Cards

Arbovirus Models to Provide Practical Management Tools for Mosquito Control and Disease Prevention in the Northern Territory, Australia

Ross River virus infection in a traveller returning from northern Australia

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