Researchers reported recently that germs could make you fat.

They said that germs might cause obesity as they make their home in the gut that makes one developed several health-threatening symptoms that go along with obesity.

Possibilities are there of certain bacteria causing inflammation that affects appetite Crohn's disease, which is an inflammatory bowel conditions, and colitis.

Andrew Gewirtz of Emory University in Atlanta and colleagues reported that the germs make you overeat.

Gewirtz said, "Previous research has suggested that bacteria can influence how well energy is absorbed from food, but these findings demonstrate that intestinal bacteria can actually influence appetite."

He added that they concluded these findings by studying mice that had colitis.

Suspecting that some kind of germ might be responsible, the team transferred mouse embryos into surrogate mothers. This transfer was done for preventing them from being infected by their own mothers.

It was noticed that the colitis was improving but the baby mice became obese and developed metabolic syndrome. It is a group of symptoms that include too much fat around the midsection, unhealthy cholesterol levels, high blood pressure and insulin resistance.

Gewirtz believes insulin resistance might be the key as in this the body does not use insulin effectively to break down food.

The next step would be to study how gut bacteria changes in people having weight-loss surgery.