The Arrival of the Northern House Mosquito<i>Culex pipiens</i>(Diptera: Culicidae) on Newfoundland’s Avalon Peninsula

Chaulk, Andrew C.; Carson, Kate P.; Whitney, Hugh; Fonseca, Dina M.; Chapman, Thomas

doi:10.1093/jme/tjw105

Cited by 6 publications

(8 citation statements)

References 28 publications

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“…Cx. pipiens , a major vector for WNV, is already present in new locations [145], and is projected to expand its range further in Canada, especially under a high-greenhouse-gas emission scenario [143]. The distribution of Cx.…”

Section: Vector and Host Distributionsmentioning

confidence: 99%

The Role of Temperature in Transmission of Zoonotic Arboviruses

Ciota

Keyel

2019

Viruses

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We reviewed the literature on the role of temperature in transmission of zoonotic arboviruses. Vector competence is affected by both direct and indirect effects of temperature, and generally increases with increasing temperature, but results may vary by vector species, population, and viral strain. Temperature additionally has a significant influence on life history traits of vectors at both immature and adult life stages, and for important behaviors such as blood-feeding and mating. Similar to vector competence, temperature effects on life history traits can vary by species and population. Vector, host, and viral distributions are all affected by temperature, and are generally expected to change with increased temperatures predicted under climate change. Arboviruses are generally expected to shift poleward and to higher elevations under climate change, yet significant variability on fine geographic scales is likely. Temperature effects are generally unimodal, with increases in abundance up to an optimum, and then decreases at high temperatures. Improved vector distribution information could facilitate future distribution modeling. A wide variety of approaches have been used to model viral distributions, although most research has focused on the West Nile virus. Direct temperature effects are frequently observed, as are indirect effects, such as through droughts, where temperature interacts with rainfall. Thermal biology approaches hold much promise for syntheses across viruses, vectors, and hosts, yet future studies must consider the specificity of interactions and the dynamic nature of evolving biological systems.

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Section: Vector and Host Distributionsmentioning

confidence: 99%

The Role of Temperature in Transmission of Zoonotic Arboviruses

Ciota

Keyel

2019

Viruses

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“…However, small areas of southern coastal British Columbia might become suitable based on short-and long-term projected changes in the climate. On the other hand, the vector of the West Nile virus, Culex spp, is now well-established and has been expanding its territory in Canada (11); this is consistent with the steady transmission rate of West Nile virus infections in many Canadian provinces for over a decade (12).…”

Section: Mosquito-borne Diseasesmentioning

confidence: 54%

Impact of climate change on emerging infectious diseases: Implications for Canada

Carignan

Valiquette

Laupland

2019

Official Journal of the Association of Medical Microbiology and

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“…Case 5 resides in Newfoundland where no endemic WNV cases have ever been reported and the mosquito Culex pipiens has only recently been reported in this province . Summertime temperatures in Newfoundland are considered too cold for WNV amplification to occur in the mosquito population .…”

Section: Resultsmentioning

confidence: 99%

A case series of inactivated Japanese encephalitis virus vaccination associated with positive West Nile virus blood donor screening nucleic acid tests

Drews

Makowski²,

Wood³

et al. 2020

Transfusion

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BACKGROUND: West Nile Virus (WNV) is a member of the Japanese Encephalitis (JE) serocomplex within the Flaviviridae family. We report four whole blood donors and one plasma donor with WNV nucleic acid test (NAT)-reactive donations between September 2018 and November 2019, following recent Japanese Encephalitis virus (JEV) vaccination.CASE SERIES: Cases 1 and 4 had reactive WNV NAT donations 1 day after receiving the JEV vaccine. Case 2 had a reactive WNV donation 3 days after receiving the JEV vaccine. Case 3 had a reactive WNV NAT donation 3 days after returning from Arizona and 1 day after receiving the JEV vaccine. Case 5 had a reactive WNV donation the same day as receiving the JEV vaccine.STUDY DESIGN AND METHODS: WNV screening used the Roche cobas WNV nucleic acid test (NAT) (Roche Molecular Systems). Reference testing on WNV-reactive donations was carried out by the National Microbiology Laboratory (NML). JEV vaccine dilutions were also analyzed. RESULTS: Supplemental NAT was negative for WNVand JEV for Cases 1, 3, and 5. Case 2 had a weak amplification curve for one of two JEV NAT targets. Case 4 was JEV NAT-positive, WNV NAT-negative. Serologic testing on donation specimens for Cases 2, 4, and 5 did not support recent or remote WNV infection. JEV vaccine dilutions were detected by both cobas and supplemental NAT. CONCLUSIONS:We recommend implementing a temporary blood donor deferral following a JEV vaccination, if screening utilizes a WNV assay with the capability of detecting other members of the JE serocomplex.From the 1 Canadian Blood Services; the

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The Arrival of the Northern House MosquitoCulex pipiens(Diptera: Culicidae) on Newfoundland’s Avalon Peninsula

Cited by 6 publications

References 28 publications

The Role of Temperature in Transmission of Zoonotic Arboviruses

The Role of Temperature in Transmission of Zoonotic Arboviruses

Impact of climate change on emerging infectious diseases: Implications for Canada

A case series of inactivated Japanese encephalitis virus vaccination associated with positive West Nile virus blood donor screening nucleic acid tests

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