Food safety control systems at the Shanghai World Expo should be adopted across China, said World Health Organization (WHO) expert on Tuesday.

Peter Ben Embarek, food safety specialist with the WHO, said Shanghai Food and Drug Administration (FDA) and Expo organizers had built an efficient system to ensure food safety, with no reported problems.

"It works very well," he said.

He said the organizers had trained kitchen staff, both in and outside of the Expo site, and provided continuous education in food safety.

Ben Embarek said Shanghai and other provinces could adopt aspects of the system, such as strict selection of food suppliers, regular sample tests of food, and constant monitoring of food storage temperatures.

New technologies in food safety control employed at the Expo could also be introduced into homes, he said.

The WHO launched a five-day exhibition, "Five Keys to Safer Food," on Monday at the United Nations Pavilion to inform the public of simple food safety measures for the home.

The keys -- cleanliness, separation of raw and cooked foods, thorough cooking, keeping food at safe temperatures, and safe water and raw materials -- had been used in the Expo to train food handlers and raise awareness among consumers, said Ben Embarek.

He said the WHO campaign had increased consumer interest in food safety issues.

"It's also very important to educate producers," he said.