The virus was first detected in 1952 in Tanzania and has traditionally been confined to tropical areas, the place hundreds of thousands of infections happen annually.
Chikungunya is unfold by mosquitoes (Picture: AP)
An excruciatingly painful tropical illness as soon as confined to Africa and Asia can now be transmitted by mosquitoes throughout most of Europe, scientists have warned, elevating fears it might quickly edge nearer to Britain. New analysis has discovered that chikungunya — a virus that causes extreme and extended joint ache and may be deadly in younger kids and older adults — is ready to unfold at decrease temperatures than beforehand believed.
As Europe warms, that shift dramatically expands the areas and months throughout which outbreaks are attainable. Chikungunya virus was first detected in 1952 in Tanzania and has traditionally been confined to tropical areas, the place hundreds of thousands of infections happen every 12 months. Nevertheless, a small variety of instances have been reported in additional than 10 European nations lately, and large-scale outbreaks of lots of of instances hit France and Italy in 2025.
Chikungunya causes extreme joint ache (Picture: AFP through Getty Photographs)
The brand new evaluation, printed within the Journal of the Royal Society Interface, is the primary to totally assess the impact of temperature on the incubation time of the virus within the Asian tiger mosquito, Aedes albopictus, which has invaded Europe in latest a long time.
The examine discovered the minimal temperature at which infections might happen is 2.5°C decrease than earlier, much less strong, estimates.
Sandeep Tegar, on the UK Centre for Ecology and Hydrology (UKCEH) and lead creator of the examine, mentioned: “The speed of world warming in Europe is roughly double the speed of world warming at world scale and the decrease temperature restrict for virus unfold issues loads, so our new estimates are fairly stunning. The northward enlargement of the illness is only a matter of time.”
The examine discovered the cut-off temperature for transmission is 13°C-14°C, which means infections can happen for greater than six months of the 12 months in Spain, Portugal, Italy and Greece, and for 3 to 5 months of the 12 months in Belgium, France, Germany, Switzerland and a dozen different European nations.
In south-east England, circumstances could also be appropriate for 2 months of the 12 months.
A mosquito lure as a part of the combat towards Chikungunya on Reunion Island (Picture: AFP through Getty Photographs)
The minimal temperature was beforehand estimated at between 16°C and 18°C, which means there’s a threat of chikungunya outbreaks in additional areas and for longer durations than beforehand thought.
Dr Steven White, additionally at UKCEH, mentioned: “Twenty years in the past, in the event you mentioned we have been going to have chikungunya and dengue in Europe, everyone would have mentioned you have been mad: these are tropical ailments. Now every thing’s modified. That is right down to this invasive mosquito and local weather change – it actually is so simple as that. We’re seeing speedy change and that’s the fear. Up till final 12 months, France had recorded 30-odd instances of chikungunya during the last 10 years or so. Final 12 months, they’d over 800.”
Outbreaks in Europe are sparked by contaminated travellers coming back from tropical areas and being bitten by native tiger mosquitoes, which then unfold the illness. Till now, Europe’s chilly winters have halted tiger mosquito exercise and served as a firebreak towards the illness from one 12 months to the subsequent.
Nevertheless, scientists are more and more observing year-round tiger mosquito exercise in southern Europe, suggesting chikungunya outbreaks are prone to intensify because the continent warms. The UKCEH workforce is investigating this concern.
Dr White mentioned: “It will be important there may be continued motion to attempt to stop the tiger mosquito from establishing within the UK as a result of this extremely invasive species is able to transmitting a number of infections that may trigger critical well being circumstances, together with chikungunya, dengue and Zika viruses.”
There haven’t but been any native transmissions of chikungunya reported within the UK, however there have been a file 73 instances amongst individuals who contracted the virus overseas between January and June 2025, virtually thrice as many as in the identical interval in 2024.
The most recent information from around the globe Subscribe Invalid e mail
We use your sign-up to supply content material in methods you have consented to and to enhance our understanding of you. This may occasionally embody adverts from us and third events based mostly on our understanding. You may unsubscribe at any time. Learn our Privateness Coverage
Dr Diana Rojas Alvarez, who leads the World Well being Group’s workforce on viruses transmitted by insect and tick bites, mentioned: “This examine is essential as a result of it signifies that transmission in Europe would possibly turn into much more evident over time.”
She added: “Local weather has a huge effect on this, however Europe nonetheless has the possibility to manage these mosquitoes from spreading any additional.”
Leave a Reply