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Tuesday, 27 October 2026
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Barcelona releases parasite infected mosquitoes to fight dengue in European first

More than half a million sterilized male mosquitoes have been released in Barcelona to reduce populations and limit mosquito-borne diseases like dengue.

HEROIC BREAKING NEWS, written by our newsroom0 views

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Picture: New Scientist

More than half a million male mosquitoes carrying a parasite called Wolbachia have been released in Barcelona, New Scientist reported. This initiative marks the first large-scale release of parasite-infected mosquitoes in public spaces in Europe. [1]

The strategy targets the Asian tiger mosquito, which is established across many European countries. According to New Scientist, when the infected male mosquitoes mate with wild females, the resulting eggs do not hatch, which systematically lowers the local mosquito population. [1]

Mosquitoes are a family of small flies with females of many species adapted to drink blood, Wikipedia notes. The primary goal of the Barcelona deployment is to reduce the risk of people contracting mosquito-borne infections such as dengue fever. [1][2]

New Scientist reported that while similar population control methods have already been implemented in Singapore, the Barcelona release represents the first application of the technique in European public spaces. pest control expert Rubén Bueno Mari highlighted it as the first real introduction of its kind in the city. [1]

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In short

  • More than 500,000 male mosquitoes carrying the Wolbachia parasite were released in Barcelona.
  • Eggs produced after these males mate with females do not hatch.
  • This is the first large-scale release of parasite-infected mosquitoes in European public spaces.
  • The effort aims to suppress Asian tiger mosquito numbers and reduce dengue transmission risks.

Sources

Every paragraph above points to the numbered items it rests on. Read the originals here.

  1. [1]Parasite-infected mosquitoes released in Europe for first timeNew Scientist, 6d ago (the report this story comes from)

Background

  1. [2]Mosquito on Wikipedia
  2. [3]Europe on Grokipedia

Our newsroom writes these reports with the help of software, from the 3 sources listed and nothing else, and checks them against those sources. Facts can still be wrong or move on; the originals are the record. Spotted a mistake? Write to daniel@monsterkong.com.

Earlier reports of ours on the same people and subjects.

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