Ant attack

Do not underestimate these tiny insects, which look harmless. If you find ants in your home, help is underway. Liu Zhihua reports in Beijing.

Awar has been declared on Beijing's rising ant population, which experts say poses a health risk because they can spread diseases, such as dysentery, typhoid and pneumonia. "Ants look tiny and safe, but they are as harmful as cockroaches and rats," says Wu Jian, an ant expert with State Forestry Administration.

"Most people are not aware of the potential harm they pose, and that is very dangerous."