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Abstract

Background

Over the last decade, the abundant distribution of the Asian tiger mosquito in southern Europe and the import of chikungunya virus (CHIKV) by infected travellers has resulted in at least five local outbreaks of chikungunya fever in France and Italy. Considering the ongoing spread of to central Europe, we performed an analysis of the Europe-wide spatial risk of CHIKV transmission under different temperature conditions. specimens from Germany and Italy were orally infected with CHIKV from an outbreak in France and kept for two weeks at 18 °C, 21 °C or 24 °C. A salivation assay was conducted to detect infectious CHIKV. Analyses of mosquito saliva for infectious virus particles demonstrated transmission rates (TRs) of > 35%. Highest TRs of 50% for the mosquito population from Germany were detected at 18 °C, while the Italian population had highest TRs of 63% at 18 °C and 21 °C, respectively. Temperature data indicated a potential risk of CHIKV transmission for extended durations, i.e. sufficiently long time periods allowing extrinsic incubation of the virus. This was shown for areas already colonised by , as well as for large parts of central Europe that are not colonised. The current risk of CHIKV transmission in Europe is not primarily restricted by temperature, which allows extrinsic incubation of the virus, but rather by the vector distribution. Accordingly, all European countries with established populations of should implement respective entomological surveillance and monitoring systems, as basis for suitable control measures.

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/content/10.2807/1560-7917.ES.2018.23.29.1800033
2018-07-19
2024-12-21
/content/10.2807/1560-7917.ES.2018.23.29.1800033
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Experimental risk assessment for chikungunya virus transmission based on vector competence, distribution and temperature suitability in Europe, 2018
<p class="citation"> <span>Citation style for this article:</span> <span class="meta-value authors"> <a href="/search?value1=Anna+Heitmann&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Heitmann Anna</a>, <a href="/search?value1=Stephanie+Jansen&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Jansen Stephanie</a>, <a href="/search?value1=Renke+L%C3%BChken&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Lühken Renke</a>, <a href="/search?value1=Michelle+Helms&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Helms Michelle</a>, <a href="/search?value1=Bj%C3%B6rn+Pluskota&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Pluskota Björn</a>, <a href="/search?value1=Norbert+Becker&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Becker Norbert</a>, <a href="/search?value1=Carola+Kuhn&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Kuhn Carola</a>, <a href="/search?value1=Jonas+Schmidt-Chanasit&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Schmidt-Chanasit Jonas</a>, <a href="/search?value1=Egbert+Tannich&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Tannich Egbert</a></span>. Experimental risk assessment for chikungunya virus transmission based on vector competence, distribution and temperature suitability in Europe, 2018. <a href="/content/ecdc">Euro Surveill.</a> 2018;23(29):pii=1800033. <a href="https://doi.org/10.2807/1560-7917.ES.2018.23.29.1800033" title="doi link" target="_blank">https://doi.org/10.2807/1560-7917.ES.2018.23.29.1800033</a> <span class="ES_Article_citation"> <span class="generated">Received</span>: 19 Jan 2018;&nbsp;&nbsp; <span class="generated">Accepted</span>: 29 May 2018 </span> </p>
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