Risk factors and evaluation on control and prevention of infectious disease outbreaks in schools in Ningbo,2010-2011

Objective To explore the epidemiology and risk factors of infectious disease outbreaks in schools in Ningbo and to provide scientific bases for infectious disease control and prevention.Methods A total of 18 schools with infectious disease outbreaks and 36 schools without outbreaks in Ningbo during 2010-2011were selected by 1∶2 matched case-control method.Univariate and multivariate conditioned logistic regression analysis were used for data analysis.Comprehensive assessment was selected to evaluate the measures of control and prevention.Results During 2010-2011,a total of 362 cases had been reported in infectious disease outbreaks in schools in Ningbo.The average attack rate was 4.45%.The outbreak occurred mainly on summer and autumn.Varicella outbreak accounted for 77.8%(14/18)of all events.Primary schools accounted for 66.67 %(12/18) of all schools.Multivariate conditioned logistic regression revealed that hand-washing product offering and health education curriculum were protective factors for infectious disease outbreak,odd ratio was 0.13 and 0.12,respectively.Five outbreaks management were evaluated as good,ten were evaluated and 3 were evaluated as slightly worse.Conclusion The prevention of varicella outbreak in primary schools should be the focus of future work.Hand-washing products offering and health education curriculum were protective for infectious disease outbreaks.