New mosquito poses greater malaria threat

Nets are no defence against bug that bites people in the evening

Scientists have discovered what could be a new breed of mosquito in Africa with the potential to cause hundreds of thousands more deaths from malaria. Charities say the previously unknown species could pose a serious setback to the global fight against the disease – one of the world's biggest killers.

Researchers said the discovery is worrying because the insect does not behave like normal mosquitoes. Already nearly one million people a year die from malaria caused by bites. But that number would be much higher were it not for mosquito nets. They prevent the female anopheles – the main cause of the disease – from biting at night, when it sucks blood as part of its egg-production cycle. Nearly one million people are thought to have cheated death over the past 12 years by sleeping under nets coated with insecticide.

The new type of mosquito, however, does not wait until night-time; it bites while people are outdoors in the early evening. Even more worrying for the scientists is that they are as yet unable to match the DNA of the new species to any existing mosquito variety.

Jennifer Stevenson of the London School of Hygiene and Tropical Medicine, who was part of the research group, said: "We observed that many mosquitoes we caught – including those infected with malaria – did not physically resemble other known malaria mosquitoes.

"Analysis indicated that their DNA differed from sequences available for known malaria-transmitting mosquitoes in Africa."

Researchers are worried that the feeding daytime pattern of the new tropical bug posed a serious challenge to controlling the disease.

Ms Stevenson said her team found the species in a village in the highlands of western Kenya where they set up outdoor and indoor traps: "The main difference that came through from this study is that we caught 70 per cent of these species A – which is what we named them because we don't know exactly what they are – outdoors before 10.30pm, which is the time when people in the village usually go indoors."

Andrew Griffiths, from the children's charity World Vision, said the findings are a setback in the worldwide battle against malaria: "It's concerning because bed nets are one of the important tools in combating malaria and we've seen deaths go down dramatically."

He added that while nets are not the only answer to reducing the incidence of the disease, they are one of the main ways.

"It would mean that one of the important parts in the response to malaria would be taken away. We have to be talking about protecting yourself at different times of the day and put even more focus on the community and other systems without too much reliance on bed nets."

Scientists who led the study in Kenya are now calling for wider controls to deal with outdoor transmission of the disease.

Jo Lines, a colleague of Ms Stevenson at London School of Hygiene & Tropical Medicine and a former co-ordinator for the World Health Organisation's global malaria programme, said: "We do not yet know what these unidentified specimens are, or whether they are acting as vectors [transmitters] on a wider scale, but in the study area they are clearly playing a major and previously unsuspected role."

Arts & Entertainment
The Honesty Policy is a group of anonymous Muslims who believe that the community needs a space to express itself without shame or judgement
music
News
Waitrose will be bringing in more manned tills
newsOverheard in Waitrose: documenting the chatter in 'Britain's poshest supermarket'
Life & Style
life
Arts & Entertainment
Back in the suit: There are only so many variations you can spin on the lives or adventures of Peter Parker
filmReview: Almost every sequence and set-up in The Amazing Spider-Man 2 seems familiar from some earlier superhero film
VIDEO
Arts & Entertainment
Jack Gleeson as Joffrey Baratheon in Game of Thrones
tv
Life & Style
Father and son: Michael Williams with son Edmund
lifeAs his son’s bar mitzvah approaches, CofE-raised Michael Williams describes the unexpected joys he’s experienced in learning about his family’s other faith
Arts & Entertainment
Ian Anderson, the leader of British rock band Jethro Tull, (right) and British guitar player Martin Barre (left) perform on stage
musicJethro Tull frontman leads ‘prog rock’ revival
Sport
Gareth Bale dribbled from inside his own half and finished calmly late in the final to hand Real a 2-1 win at the Mestalla in Valencia
sport
Arts & Entertainment
Who laughs lass: Jenny Collier on stage
comedy... writes Jenny Collier, the comedian whose recent show was cancelled because there were 'too many women' on the bill
News
House proud: keeping up with the Joneses now extends to children's playhouses
newsLuxury playhouses now on the market for as much as £800
News
news
Life & Style
Stir it up: the writer gets a lichen masterclass from executive chef Vivek Singh of the Cinnamon restaurants
food + drinkLichen is the surprise new ingredient on fine-dining menus, thanks to our love of Scandinavian and Indian cuisines
Extras
indybest
Arts & Entertainment
Ken Loach (left) and Mike Leigh who will be going head to head for one of cinema's most coveted prizes at this year's Cannes Film Festival
filmKen Loach and Mike Leigh to fight it out for the Palme d'Or
News
The academic, Annamaria Testa, has set out on her website a list of 300 English words that she says Italians ought to stop using
newsAcademic speaks out against 'Italianglo' - the use of English words in Italian language
Independent
Travel Shop
the manor
Up to 70% off luxury travel
on city breaks Find out more
santorini
Up to 70% off luxury travel
on chic beach resorts Find out more
sardina foodie
Up to 70% off luxury travel
on country retreats Find out more
Have you tried new the Independent Digital Edition iPad app?

ES Rentals

    Independent Dating
    and  

    By clicking 'Search' you
    are agreeing to our
    Terms of Use.

    iJobs Job Widget
    iJobs General

    Apprentice IT Technician

    £150.00 per week: QA Apprenticeships: This company is a company that specializ...

    1st Line Technical Service Desk Analyst IT Apprentice

    £153.75 per week: QA Apprenticeships: This company is an innovative outsourcin...

    1st Line Helpdesk Engineer Apprentice

    £150.00 per week: QA Apprenticeships: This company has been providing on site ...

    Sales Associate Apprentice

    £150.00 per week: QA Apprenticeships: We've been supplying best of breed peopl...

    Day In a Page

    How I brokered a peace deal with Robert Mugabe: Roy Agyemang reveals the delicate diplomacy needed to get Zimbabwe’s President to sit down with the BBC

    How I brokered a peace deal with Robert Mugabe

    Roy Agyemang reveals the delicate diplomacy needed to get Zimbabwe’s President to sit down with the BBC
    Video of British Muslims dancing to Pharrell Williams's hit Happy attacked as 'sinful'

    British Muslims's Happy video attacked as 'sinful'

    The four-minute clip by Honesty Policy has had more than 300,000 hits on YouTube
    Church of England-raised Michael Williams describes the unexpected joys in learning about his family's Jewish faith

    Michael Williams: Do as I do, not as I pray

    Church of England-raised Williams describes the unexpected joys in learning about his family's Jewish faith
    A History of the First World War in 100 moments: A visit to the Front Line by the Prime Minister's wife

    A History of the First World War in 100 moments

    A visit to the Front Line by the Prime Minister's wife
    Comedian Jenny Collier: 'Sexism I experienced on stand-up circuit should be extinct'

    Jenny Collier: 'Sexism on stand-up circuit should be extinct'

    The comedian's appearance at a show on the eve of International Women's Day was cancelled because they had "too many women" on the bill
    Cannes Film Festival: Ken Loach and Mike Leigh to fight it out for the Palme d'Or

    Cannes Film Festival

    Ken Loach and Mike Leigh to fight it out for the Palme d'Or
    The concept album makes surprise top ten return with neolithic opus from Jethro Tull's Ian Anderson

    The concept album makes surprise top ten return

    Neolithic opus from Jethro Tull's Ian Anderson is unexpected success
    Lichen is the surprise new ingredient on fine-dining menus, thanks to our love of Scandinavian and Indian cuisines

    Lichen is surprise new ingredient on fine-dining menus

    Emily Jupp discovers how it can give a unique, smoky flavour to our cooking
    10 best baking books

    10 best baking books

    Planning a spot of baking this bank holiday weekend? From old favourites to new releases, here’s ten cookbooks for you
    Jury still out on Manchester City boss Manuel Pellegrini

    Jury still out on Pellegrini

    Draw with Sunderland raises questions over Manchester City manager's ability to motivate and unify his players
    Ben Stokes: 'Punching lockers isn't way forward'

    Ben Stokes: 'Punching lockers isn't way forward'

    The all-rounder has been hailed as future star after Ashes debut but incident in Caribbean added to doubts about discipline. Jon Culley meets a man looking to control his emotions
    Mark Johnston: First £1 million jackpot spurs him on

    Mark Johnston: First £1 million jackpot spurs him on

    The most prize money ever at an All-Weather race day is up for grabs at Lingfield on Friday, and the record-breaking trainer tells Jon Freeman how times have changed
    Ricky Gervais: 'People are waiting for me to fail. If you think it's awful, then just don't watch it'

    Ricky Gervais: 'People are waiting for me to fail'

    As the second series of his divisive sitcom 'Derek' hits screens, the comedian tells James Rampton why he'll never bow to the critics who habitually circle his work
    Mad Men series 7, TV review: The suits are still sharp, but Don Draper has lost his edge

    Mad Men returns for a final fling

    The suits are still sharp, but Don Draper has lost his edge
    Google finds a lift into space will never get off the ground as there is no material strong enough for a cable from Earth into orbit

    Google finds a lift into space will never get off the ground

    Technology giant’s scientists say there is no material strong enough for a cable from Earth into orbit