Do you all believe this? Human
DNA are all the same lah
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Scientists believe they have discovered the reason why mosquitoes
find some of us more tasty than others.
It was already known that some people produce "come and get me"
smells which appeal to the blood-suckers.
Rothamsted Research, in Herts, found those less likely to be bitten
produced odours which masked these scents.
The natural repellent could be used to protect everyone from the
bugs, suggests the Biotechnology and Biological Sciences Research
Council.
Masking attractiveness
Until that happens, people who are frequently bitten might benefit
from hanging around those who escape relatively unscathed.
When herds of cattle contain larger numbers of cows that give off
masking odours, fewer mosquitoes will bother the herd.
Rothamsted Research tested the behavioural reaction of yellow fever
mosquitoes to the odour of a handful of volunteers.
The results identified several compounds that reduced "an
attractive person down to a level of attractiveness that is similar
to blank air", said team member James Logan.
Other researchers had presumed some people were lacking certain
attractive odours.
"What we are saying is these attractants are still there but some
people produce extra chemicals which can mask them," he said.
Hot sweat
He said it might be possible to make new insect repellents that
contain these natural masking odours.
They would likely be completely odourless to humans, unlike current
mosquito repellents, he said.
Colleague Professor John Pickett said: "We have identified about 11
compounds. We are going to narrow that down to the most attractive
and work out which mixtures of those are the most effective."
Professor Chris Curtis of the London School of Hygiene and Tropical
Medicine, said it was true that some people were more attractive to
mosquitoes than others, but warmth "is another important
factor".
One of his students found that his warm, sweaty jogging socks were
particularly alluring to the bugs.
Many people have found it works in tropical countries