The Department of Health today confirmed three imported food poisoning outbreaks involving 33 people and urged the public to be on guard against food-borne infections.

The 14 men and 19 women, ranging in age from two to 75, were among three tour groups to Phuket, Thailand of around 85 people who had a buffet lunch on a Khai Island beach on December 31.

They subsequently suffered from diarrhea, abdominal pain, fever and vomiting. Two of them had been admitted to a hospital in Thailand but were subsequently discharged. The others sought medical treatment upon their return to Hong Kong. All are in stable condition and no hospitalisation was required.

Initial investigation showed that the patients developed gastrointestinal symptoms within 11 to 30 hours after the lunch buffet on December 31.

The outbreaks could be related to cross contamination of cooked and uncooked food.

The department has contacted the travel agencies concerned and other tour members to provide health education. It has also notified relevant health authorities of the case.

Preventive measures

The public are reminded to observe good personal, food and environmental hygiene at all times to prevent food-borne diseases.

* Only patronise reputable and licensed restaurants.

* Do not patronise illegal food hawkers.

* Cook food thoroughly.

* Avoid eating raw seafood.

* Be a discerning consumer in choosing cold dishes, including sashimi and raw oysters in a buffet.

* Drink boiled water.

* Use two sets of chopsticks and eating utensils to handle raw and cooked food.

* Do not use salt, vinegar, wine and wasabi to kill bacteria as they are not effective.

* Always wash hands before eating and after going to the toilet.