Not as interesting as the Spandex thread but anyway
Scientists say obesity just like a virus
Can be spread by dirty hands
Virus causes fat cells to multiply
OBESITY can be "caught" from another individual in the same way as a cold with the virus spread by dirty hands, scientists suggest.
The condition has been linked to a highly-infectious virus that causes sniffles and sore throats.
The adenovirus apparently attacks tissue and causes fat cells to multiply - leading to massive weight gain, The Courier-Mail reports.
Previous studies have shown that chickens and mice infected with the bug put on weight more quickly than uninfected animals - even when they do not eat more.
Now human studies show that almost a third of obese adults carry the virus compared with 11 per cent of lean men and women.
Professor Nikhil Dhurandhar, who led the research, said the bug continued to add weight gain long after those infected recovered from their cough or cold.
"This virus goes to the lungs and spreads through the body," he said.
"It goes to various organs and tissues such as the liver, kidney, brain and fat tissue. When this virus goes to fat tissue it replicates, making more copies of itself and in the process increases the number of new fat cells, which may explain why the fat tissue expands and why people get fat when they are infected with this virus."
The professor, from Pennington Biomedical Research Centre in Louisiana, said victims could remain infectious for up to three months.
"But people could be fat for reasons other than viral infections, so it's really pointless to try to avoid fat people to avoid infection," he said.
Learning more about adenovirus's role in weight gain could speed the development of an antiobesity vaccine, or drugs to tackle the condition.
Obesity experts, however, dismissed evidence of a link with adenovirus as "sparse". Tam Fry, of the Child Growth Foundation, said: "You are much more likely to pick up the flu than obesity.
"In general, obesity is down to eating more than you need and not exercising as much as you should."
Dr Ian Campbell, a GP and medical director of the charity Weight Concern, said: "A virus will never be the reason for why we have an obesity epidemic.
"There are far too many other factors, starting with our calorie intake exceeding our expenditure, and that's because we live such sedentary lives.
"Our dietary habits have changed beyond belief and I don't believe that's the effect of a viral infection. It is the fault of the commercial expansion of companies making unhealthy foods."
