2015年大连市食源性疾病监测哨点病人诺如病毒感染分析

Analysis on Norovirus infection among patients from food-borne disease sentinel surveillance points,Dalian city,2015

目的分析大连市食源性疾病监测哨点诺如病毒的感染状况,为食源性疾病防控提供科学依据。方法 2015年5~12月对大连市10家食源性疾病监测哨点医院采集的1 253份标本进行诺如病毒荧光定量RT-PCR核酸检测。结果检测1 253份标本,诺如病毒核酸阳性24份,阳性率为1.92%,GⅠ型和GⅡ阳性率分别为0.32%和1.60%。男性阳性率(1.49%)低于女性(2.33%)(P>0.05)。第四季度阳性率最高为4.58%,≤9岁儿童阳性率最高为5.19%。可疑原因食品中,食用蛋与蛋制品和豆类及制品的病例阳性率较高,分别为10.00%和10.53%。可疑进食场所中,在食品店、食堂、酒店进食的病例阳性率较高,分别为5.56%、5.26%和5.21%。结论大连市食源性疾病中存在GⅠ型和GⅡ型诺如病毒感染,以GⅡ型感染为主。

Objective To analyze the Norovirus infection status of food-borne disease sentinel surveillance points,so as to provide basis for the food borne disease prevention and control. Methods A total of 1 253 samples were collected from 10 food-borne disease sentinel hospitals in Dalian city and detected by Noroviruses real time quantitative RT PCR during May-December 2015. Results In the 1 253 specimens,the positive rate was 1.92% ,the positive rate of G Ⅰ and G Ⅱ was 0.32 % and 1.60 % respectively. The positive rate was lower in males （1. 49% ）than that of females（2.33 0% ）（ P〉 0.05）. The highest positive rate was 4.58% in the fourth quarter. The highest positive rate was 5.19% among children at 9 year-old and below. In suspicious foods, the higher positive rate was 10.00% and 10.53% with eating eggs and egg products,beans and products respectively. In suspicious eating places, the higher positive rate was 5.56%,5.26% and 5.21 % with eating in cafeteria,canteen,and hotel respectively. Conclusion There are G Ⅰ and G Ⅱ Norovirus infection among food-borne diseases and they are mainly caused by Norovirus G Ⅱ in Dalian city.