深圳野生动物园天鹅湖大型水体禽流感疫点现场消毒

ON-THE-SPOT DISINFECTION OF LARGE WATER BODY AVIAN INFLUENZA FOCUS IN SWAN LAKE OF SHENZHEN WILD ANIMAL ZOO

目的扑灭深圳市野生动物园黑天鹅感染禽流感疫情,消除天鹅湖水体污染。方法采用二氧化氯对水体和湖底淤泥施药达到彻底消毒水体和淤泥的目的。结果以70 mg/L二氧化氯对整个湖水和淤泥进行消毒,投药作用1 h对湖水细菌杀灭率达99.45%,粪大肠菌群达卫生标准,投药前后均未检出致病菌和H5N1型禽流感病毒。湖底淤泥经处理后,对细菌的杀灭率≥90%,粪大肠菌值达到卫生标准,未检出致病菌及H5N1型禽流感病毒。结论以二氧化氯处理大型湖水及湖底淤泥消毒效果可靠,禽流感疫情得到控制,消毒方案及处理结果得到国家禽流感总指挥部专家认可。

Objective To extinguish the epidemic of avian influenza infection of black swans in wild animal zoo of Shenzhen City and to clear up pollution of water body of the swan lake. Methods The spraying method was used to evenly spray chlorine dioxide onto the water surface and to the bottom of the lake with stirring the mud in order to achieve thorough disinfection of the water body and the mud. Results Mter disinfection of the water and the mud of the whole lake with 70 mg/L chlorine dioxide for 1 h, the killing rate of the bacteria in the lake water attained 99.45% and the fecal coli - group bacterial count met the sanitary standard. Neither pathogenic bacteria nor H5N1 - type avian influenza virus was de- tected before and after spraying the disinfectant. After treatment of the mud at the lake bottom, the bacterial killing rate was ≥90% and the fecal coli - group bacterial count met the sanitary standard. Neither pathogenic bacteria nor H5N1 - type a- vian influenza virus was detected. Conclusion Treatment of large lake water body and mud at lake bottom with the method of spraying chlorine dioxide had reliable disinfection efficacy and controlled the epidemic of avian influenza. The disinfection scheme and treatment results were approved by the experts of the state Avian Influenza General Headquarters.