Tram Anh chicken rice poisoning patient was treated at Yersin Nha Trang General Hospital before - Photo: MINH CHIEN
According to the report of the Khanh Hoa Food Safety and Hygiene Department, after conducting an investigation at Tram Anh chicken rice restaurant, it was determined that the meals that caused the poisoning were lunch and afternoon meals on March 11 and 12, caused by microorganisms (Salmonella spp, Bacillus cereus, Staphylococcus aureus).
Because the restaurant sells dine-in and take-out food and does not print receipts, the owner cannot keep track of the number of people who bought and used the food prepared by the restaurant in 2 days.
The analysis of the attack rates of the dishes in the meal that caused the poisoning showed that the attack rates of the dishes were relatively equal. The difference in attack rates between those who ate and did not eat the dishes in the lunch and afternoon meals of March 11 and 12 was not high.
Because the dishes on the food tray can be cross-contaminated with each other. On the other hand, the facility did not keep food samples, so the investigation team could not take samples of each individual dish of the meal that caused the poisoning.
Tram Anh chicken rice restaurant was suspended from business to serve the investigation - Photo: MINH CHIEN
Regarding the remaining chicken rice sample provided by the patient for the investigation team to send for testing, the dishes were placed together in the chicken rice box, so cross-contamination between dishes could also occur.
Therefore, there is not enough scientific basis to determine specifically which food is the causative food; it can only be determined that the causative food is chicken rice (including dishes: rice, shredded chicken, grilled chicken, fish sauce, egg sauce, pickled vegetables, fried onions, soup).
In addition, the investigation results showed that up to 228 people (accounting for 81.43%) had an incubation period of 6 - 24 hours; 27 people (accounting for 9.64%) had an incubation period of over 24 hours; it can be determined that the food poisoning cases were related to microorganisms, not chemicals or natural toxins.
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