Mosquito traps laced with human scent help fight malaria

Mosquito. (iStock)
Mosquito. (iStock)

The Hague - Dutch and Kenyan scientists have designed a unique mosquito trap which uses human odour to attract the malaria-carrying insects, helping cut the number of cases dramatically, researchers said on Wednesday.

A three-year study in Kenya found the special traps baited with synthetic smell helped to catch 70% of the local malaria mosquito population, and led to a 30% drop in cases in households using the devices.

Published on Wednesday in The Lancet, the research was carried out on the Kenyan island of Rusinga with the participation of all 25 000 residents.

"The odour-baited trap may also offer a solution to diseases like dengue fever and the Zika virus," Wageningen University in The Netherlands, which led the research, said in a statement.

Both dengue and Zika are caused by parasites carried by a different kind of mosquito to the malaria-bearing one, but which is also attracted by human smell.

The trap also reduces the need to rely on pesticides to control mosquitoes, which are becoming increasingly resistant to such chemicals. Using pesticides is also dangerous to agriculture.

"Beating malaria without using insecticides is my ultimate dream," said Willem Takken from Wageningen University in The Netherlands.

He led the study along with researchers from the Kenyan International Centre of Insect Physiology and Ecology and the Swiss Tropical and Public Health Institute.

The solar-powered traps were laced with human pong and placed either outside or inside homes on the island, on Lake Victoria.

Mosquito nets and anti-malarial drugs were also used to combat the disease.

Since the traps need electricity to work, the researchers installed solar panels on the houses as there is no electricity grid on the island. In an added benefit for the local people, the panels could also power two light bulbs, and charge mobile phones.

"Every minute, a child dies of malaria. This disease costs Africa $12bn a year" in health-care costs and lost production, the Dutch university said.

Malaria is caused by parasites transmitted to people through the bites of infected female mosquitoes.

There is currently no vaccine and around 438 000 people died last year from the disease, according to the World Health Organization (WHO).

Most of the deaths were among children under the age of five in sub-Saharan Africa.

The WHO is now working towards cutting the number of deaths from malaria by 90% by 2030.

We live in a world where facts and fiction get blurred
In times of uncertainty you need journalism you can trust. For only R75 per month, you have access to a world of in-depth analyses, investigative journalism, top opinions and a range of features. Journalism strengthens democracy. Invest in the future today.
Subscribe to News24
Lockdown For
DAYS
HRS
MINS
Voting Booth
When a Covid-19 vaccine for under 16's becomes available, will you be taking your children to get it?
Please select an option Oops! Something went wrong, please try again later.
Results
Yes, immediately!
38% - 4134 votes
I'll wait to see how others respond
26% - 2803 votes
No, I don't think they need it
36% - 3968 votes
Vote
ZAR/USD
15.32
(-0.49)
ZAR/GBP
21.17
(-0.07)
ZAR/EUR
18.28
(-0.12)
ZAR/AUD
11.77
(-0.06)
ZAR/JPY
0.14
(-0.09)
Gold
1700.70
(+0.04)
Silver
25.22
(+0.17)
Platinum
1128.01
(+0.31)
Brent Crude
69.67
(+3.93)
Palladium
2329.95
(+0.62)
All Share
68271.19
(+0.78)
Top 40
62788.64
(+0.87)
Financial 15
12759.80
(+0.67)
Industrial 25
87613.31
(-0.32)
Resource 10
70801.78
(+2.36)
All JSE data delayed by at least 15 minutes morningstar logo