Investigation on a hepatitis A outbreak in a social welfare institution and countermeasures

Objective To investigation and disposal a hepatitis A outbreak in a social welfare institution in Hunan,analysis and explore the outbreak reasons.Method Investigation the process of this outbreak,the epidemic data of the cases,the basic conditions and operating ways of the social welfare institution,carrying out anti-HAV-IgM detection to un-ill children and medical personnel,in order to grasp the infection conditions.Collecting all the results above,and then developed epidemiological analysis and summary.Results Total of 12 hepatitis A cases were found,the attack rate was 1.78%.There were 32 cases of subclinical infections and infection rate was 4.75%.The infection rates of the rehabilitation children and personnel in the social welfare institution were 8.81% and 1.02%,respectively(P=0.000).The infection rates of the children in 12 floor of the new building and in the other floors and branchs were 21.74% and 5.71%,respectively(P=0.000).Conclusions After implementing the joint disposal measures of isolation,disinfection,preventive inoculation,the epidemic situation was under control.The social welfare institution should pay more attention to prevention and control work on infection disease and avoid the events outbreak.