Epidemiological Investigation of the Outbreak of Acute Respiratory Infection caused by Adenovirus Type B55 in a Physical Education School in 2017

Song, Jeongsuk; Lee, Hyerim; Cho, Enhi

This epidemic was initiated in student of the modern sports department using the swimming pool, spread in the swimming department, and transmitted to other students in other departments who were not using the swimming pool (Fig. 2) . In the univariate analysis of Study 1, it was identified that the attack rate was significantly higher in the swimming group ( Table 2 ). In the multivariable analysis of Study 2, being a member of the shooting department and being a first grade student of high school were identified as independent risk factors ( Table 3) . Sharing a dormitory room was also assumed to have contributed to the transmission of the infection, but it was not identified as an independent risk factor. Therefore, it was presumed that the propagation mostly occurred during the performance of activities held by each athletic department, while some propagation occurred during class activities. Adenovirus is transferred via contacts, droplet, and exposure to contaminated environments [10, 11] . In this investigation, infection control measures were applied on two infection transmission routes. To prevent the propagated transmission, suspected cases were asked to go home and temporary school closure was carried out. To prevent the environmental transmission, disinfection was conducted using with high concentration chlorine disinfectant.