Malaria alters smell to attract mosquitoes
![Malaria alters smell to attract mosquitoes](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Malaria may alter the way people smell to make them more alluring to mosquitoes, research has shown.
Experiments with mice suggest that the malaria parasite acts like a perfumier in the body, mixing fragrances to produce an irresistible cocktail of odours.
Scientists believe it is likely to have the same effect on humans, and are studying volunteers in Africa to test the theory.
As well as aiding the search for new treatments, the work could pave the way to a method of screening symptom-free malaria carriers at risk of spreading the infection.
In order to complete its complex life cycle, the malaria parasite – the single-celled organism Plasmodium – must both be transmitted and ingested by the Anopheles mosquito via blood hosts.
Previous studies had shown that once humans and animals are infected with malaria they are more likely to be bitten by disease-carrying insects again.
Now researchers believe they know why.
Plasmodium in the blood is able to alter the host's odour profile to attract the hungry insects.
What is more, it times the changes to coincide with when the host is highly infectious.
"There appears to be an overall elevation of several compounds that are attractive to mosquitoes," said Professor Consuelo De Moraes, one of the scientists from the Swiss research institute ETH Zurich.
Tests showed that mosquitoes were most drawn to mice with large numbers of gametocytes, the parasite's reproductive cells, in their blood.
When the mosquito consumes these cells along with the host's blood, a new development cycle starts in the insect's gut.
The scientists used a technique called gas chromatography to analyse Plasmodium's effect on body odour.
They found no evidence that it generated unique odour components in the host. Instead, the parasite altered levels of compounds already naturally present, increasing most of them and raising concentrations of several more than others.
The resulting blend of odours was especially tempting to Anopheles mosquitoes.
"Since mosquitoes probably don't benefit from feeding on infected people, it may make sense for the pathogen to exaggerate existing odour cues that the insects are already using for host location," said study leader Dr Mark Mescher, also from ETH Zurich.
Remarkably, malaria infection appeared to leave its mark on body odour for life. Even when infected mice no longer displayed any symptoms, their smell showed that they still carried the parasite.
Not all stages of the disease smelled the same, however. Early and late stages of infection had different odour profiles.
Writing in the journal Proceedings of the National Academy of Sciences, the scientists concluded: "These findings… provide an important proof of concept regarding the identification of volatile biomarkers of malarial infection, and the specific compounds identified should be viewed as promising candidates for further investigation, with work on malaria-induced changes in the odours of human subjects being an obvious priority for further research."
Latest News
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Low-cost Indian carrier SpiceJet continues to burn cash
It’s not just low-cost Australian carriers that are facing hardship. SpiceJet, India’s version of Bonza, recently announced a 72 per cent reduction in its net loss versus last year. But, despite this improvement, the airline has posted losses for six straight years. But it has secured board approval to raise up to INR 30 billion […]
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
SAKA Museum recognised in TIME magazine’s World’s Greatest Places 2024
AYANA Resort Bali’s newly-opened cultural and events centre, SAKA Museum has been recognised in TIME magazine’s World’s Greatest Places list for 2024. Part of AYANA Bali’s resort destination, the museum integrates Bali’s rich history with state-of-the-art facilities, making it the centrepiece for the island’s spiritual and cultural heritage. TIME magazine’s inclusion of SAKA Museum in […]
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Journey Beyond launches first brand-led campaign during Paris Olympics
Journey Beyond is pushing the boundaries. On The Ghan, you can't even see them!
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Ascott Australia partners with Hotels for Trees
Hoteliers can take a 'Lyf' out of this book and improve their green credentials.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Victoria’s TAC Top Tourism Town Award winners for 2024
Keep looking in our own backyard. There are plenty of places to go.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Uniworld partners with Camilla Franks with Egyptian-inspired collection
We are in de-Nile about making puns combining Crocs and leopard prints, given this luxe partnership.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Aussies at Paris Olympics anxious about travel risks, with incidents already recorded
Fortunately one of our biggest gold medal hopes still held onto his pedals.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Banyan Tree Seaview Villas elevates Laguna Lang Co
If you've ever played golf in the tropics, start early. LIke way early. It's hot! Damn hot.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Silversea taps Barbara Biffi as senior vice president for global sales
Ultra-luxury and expedition cruise travel brand, Silverseas, has announced Barbara Biffi as its new senior vice president of global sales. Biffi joined the company in 2007, holding numerous positions and gaining a deep understanding of the brand, the preferences of its guests and its strategic goals, the company said. An Italian national with a wealth […]
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Wendy Wu unveils new Japan travel brochure and itineraries
Get outta town! Off-beat Japan will be a lot less congested we figure than the usual tourist hotspots.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
UK and Europe event organisers look to venues with sustainability integrity, ICC Sydney survey finds
Here in Sydney, you can even eat the table centrepieces. Although we advise they be cooked first.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Renos Rologas new general manager ANZ for FCM Travel
Two decades in the travel game! Let's hope Renos is in for the long haul at FCM.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Untamed Escapes to offer Cultural Day Tour from Port Lincoln in partnership with Maba Idi
International visitors travel thousands of kilometres for this experience. Time to share.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Luxe Finish Line Penthouses offer the best vantage point for the finish of the Sydney-Hobart
Long have we been following the yachts leavings Sydney Harbour and one day, we will see the finish, from this place!
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
In a busy world, proximity to nature is the new luxury
Forget Raffles, treat your nearest and dearest to a stay at the local campsite. They'll be super close to nature.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Circular Quay welcomes new Korean dining experience to Sydney Place
We once took Korean-American chef David Chang around Koreatown, Eastwood. Not happy about driving rain, loved the food.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
MSC Cruises unveils a new outdoor kid-friendly attraction on World America
Drop your kid down the jaws of a shark and they come out 11 decks below. Sounds good to me.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Amadeus welcomes FCM Travel as new reseller partner of Cytric Easy
Cytric Easy, the travel management tool embedded in Microsoft Teams, is to be integrated into FCM Travel portfolio. Amadeus and FCM Travel have extended their Cytric distribution agreement to include Cytric Easy. With this new agreement, global travel management company FCM Travel, becomes a reseller of the innovative travel management collaboration solution embedded into Microsoft […]
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Australian travellers abandon peer-to-peer stays and gravitate back to big hotels, survey finds
Doom scrolling Airbnb for the best-possible stay options two days out from departure was wearing us down, apparently.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Quark Expeditions launches the Ultimate Summer in the Arctic sweepstakes for travel advisors
Summer in the Arctic still means it's freezing. But hopefully a winning sweepstakes tickets will warm your cockles.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
‘I bet it smells weird’ – Internet divided over floating restaurant in China
I you are still feeling peckish at the end of your meal, their fish tank is full. But can you eat koi?
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
‘Turn up in the Northern Territory this Spring’ campaign deals
Agents and airlines get all hot and sweaty over these enticing deals. Or did someone just turn the air-conditioning up?
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
‘Like nothing on earth’: Saudi Arabia’s new Treyam resort set in a Star Wars-style landscape
As long as Jar Jar Binks is not there, we would like a seat at the Mos Eisley Cantina please.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Raffles Hotels and Resorts is set to open in Tokyo in 2028
Time to get your vision boards at the ready! Raffles is landing in Tokyo!
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
‘A true honour’ – Andrew Stark wins Flight Centre Director’s Award for the second time
Congratulations Andrew! If you're a fan of British reality TV you might notice a familiar face.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Club Med debuts travel agent portal 2.0 with bonus prize for tops sales
See those people by the pool. That could be you. Start selling through the portal people!
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Envoyage announces 2024 Australian Icons and rewards event in the Maldives
We were going to edit our name into the list but we chickened out.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
HIF Global signs collaboration agreement with Airbus on eFuels
We know it's a good thing but can a jet fuel geek out there send in a diagram explaining this please.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Crystal announces release dates for 2026 itineraries
If you have started collecting 2026 itineraries then here is another one for you.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Cairns Airport unveils display of support for FNQ youth
If you were craving some winter sun now you have a cultural reason for booking a flight to Cairns.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Viking announces six new cruise itineraries
Now's the time to start learning Putonghua, Nihongo and Lhasa. Or maybe even know where these are spoken.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Join Qatar Airways, Celebrity Cruises & Klook – Showcase Your Brand at Click Frenzy Travel August 2024!
Clicking calmly will also be welcome when it comes to this particular deal. Click calmly here to find out more.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
InsideAsia Tours launches new incentive that doubles agent commission
Double commission! We like the sound of that. Hope their system doesn't crash as a result.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Push to revive Parramatta’s iconic Roxy Theatre into entertainment destination
Long have we wished for this iconic heritage cinema to be revived as a tourist destination. Still waiting.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Qatar Airways signs an expansion to Boeing 777-9 aircraft order
Known as a quiet rural town in England, the entire global aviation industry now has its eyes on Farnborough.
![](https://www.travelweekly.com.au/wp-content/themes/bandtv1/img/default.png)
Flight Centre shares down following revised profit guidance
The stock market moves fast. What will the rest of the week hold for Flight Centre?