2015年宁波市诺如病毒腹泻病例的流行特征及其影响因素分析

Analysis of the epidemic character and influence factors of diarrhea cases caused by nororvirus infection in Ningbo in 2015

目的了解宁波市诺如病毒腹泻病例的流行特征及其影响因素,为控制本地区诺如病毒腹泻病例的疫情提供科学依据。方法收集宁波市2015年3家食源性疾病监测哨点医院的监测数据共计1 320例,描述诺如病毒腹泻病例的流行特征,并采用非条件Logistic回归分析诺如病毒感染的影响因素。结果监测病例中诺如病毒阳性检出率为10.3%(136/1 320),以GⅡ型为主,冬春季高发。多因素分析结果显示,性别、年龄、职业、季节是食源性疾病监测病例诺如病毒阳性检出的影响因素。结论诺如病毒感染是本地区腹泻病例的重要致病原因。女性、20岁~49岁、干部职员、医生或教师、冬春季是食源性疾病中诺如病毒阳性检出的危险因素。提高监测质量,加强检测力度,开展有针对性的宣教,对于控制本地区诺如病毒腹泻疫情有重要意义。

Objective To study the epidemic characteristic and influence factors of diarrhea cases caused by nororvirus infection in Ningbo,so as to provide scientific basis to control the epidemic of norovirus in this area. Methods 1 320 cases of monitoring data from 3 sentinel hospitals of Ningbo were collected in 2015. The epidemic characteristic of nororvirus infected diarrhea was described,and unconditional logistic regression was used to analyze the influence factors. Results The positive rate of nororvirus was 10. 3%（ 136 /1 320）. Nororvirus were detected mainly in type G Ⅱ in spring and winter. The result of the multivariate factor analysis showed that genders,ages,occupations and seasons were the risk factors of the nororvirus infection. Conclusion Norovirus infection is the important factor of diarrhea in the region. Female,20- 49 years old,cadres and staff,doctors or teachers,springs and winters are risk factors for the detection of nororvirus in foodborne diseases. Improving surveillance quality,enhancing detective strength and carrying out customized propaganda and education are very important for controlling the epidemic of nororvirus infected diarrhea in Ningbo.