The periodic regularities on efficacy of preventive disinfection in kindergartens in Beijing

Objective To explore periodic regularities on efficacy of preventive disinfection in kindergartens,and to provide a scientific basis for health management in kindergartens.Methods Monitoring data on preventive disinfection in kindergartens from 2007 to 2014 were collected by Beijing Chaoyang District Center for Disease Control and Prevention and were analyzed to explore the differences of disinfection efficacy of routine monitoring item (such as small towels,toys) between various time intervals (week,season,warmed period and non-warmed period) by chi-square test or exact probability method.Results The qualified rates of disinfection of taps in Monday,Tuesday,Wednesday and Thursday were 68.93%,78.26%,85.81% and 83.65%,respectively,with statistical difference(X2 =12.18,P=0.007).The qualified rates of disinfection of small towels in winter,spring,summer and autumn were 98.28%,100%,96.53% and 93.26%,respectively,with statistical difference(P =0.004);the qualified rates of disinfection of toys in winter,spring,summer and autumn were 99.33%,98.67%,90.82% and 98.18%,respectively,with significant difference(X2=32.21,P<0.01);the qualified rates of disinfection of taps in winter,spring,summer and autumn were 79.57%,89.74%,72.58% and 78.32%,respectively,with statistical difference(X2=11.41,P=0.010);the qualified rates of disinfection of desks in winter,spring,summer and autumn were 97.50%,95.38%,82.93% and 97.67%,with statistical difference(P=0.003).The qualified rate was lowest in summer compared with other seasons for small towels,toys and desks,while was lowest in autumn for taps.The qualified rates of disinfection of small towels in warmed period (96.21%) was lower than non-warmed period(100%) (P=0.030),and the qualified rates of disinfection of small toys in warmed period (95.44%) was statistical lower than 99.30% in non-warmed period(X2=4.68,P=0.030).Conclusion There are periodic regularities of efficacy of preventive disinfection in kindergartens due to the complicated factors.Specific strategies and measures should be taken to improve the preventive disinfection for kindergartens.