摘要
目的 了解现场环境中日本血吸虫在中间宿主—钉螺体内发育成熟的积温。方法 采用人工感染后放回现场环境饲养定期逸蚴的方法 ,连续记录现场温度 ,计算钉螺逸出尾蚴的积温。结果 长江流域 4省 5地 6 6 8只钉螺经 1∶2 0毛蚴感染后 ,共逸得感染性钉螺 15 5只 ,感染率为 2 3 .2 0 % ,逸出尾蚴的最低积温为 1489.43日度 ,最高积温为 2 96 0 .38日度 ,平均积温为 1793 .93± 2 32 .45日度 ;其中日本血吸虫在江滩型、水网型、山丘型环境钉螺体内发育成熟的平均积温分别为 176 3.0 1± 2 0 3 .5 1日度、192 9.49± 30 6 .38日度和 1734.19± 10 3 .39日度。结论 日本血吸虫在长江流域钉螺体积温达到 1489.
Aim To estimate the growing degree day (GDD) of Schistosoma japonicum developing in the intermediate snail host,snails,in the field.Methods The snails were infected experimentally in the laboratory and kept in the open raising field,then all raised snails were checked regularly to see the mature time of the parasite.The field temperature was recorded continuously.The GDD were calculated based on temperature data.Results The 668 snails,coming from 5 sites in 4 provinces along the Yangtze River Valley,were infected with miracidum at the ratio of 1:20.155 infected snails were obtained.The infection rate was 23.20%.The lowest,highest and average GDD were 1489.43,2960.38 and 1793.93±232.45degree-day,respectively.The average GDD of S.japonicum developing in the three types of snails,such as marshland,water network and hilly regions were 1763.01±203.51,1929.49±306.38 and 1734.19±103.39 degree-day,respectively.Conclusion The value of GDD at 1489.43 degree-day is enough for the S.japonicum to complete its development cycle in snails from the Yangtze River Valley.
出处
《中国人兽共患病杂志》
CSCD
北大核心
2001年第4期80-82,共3页
Chinese Journal of Zoonoses
基金
国家自然科学基金资助
关键词
日本血吸虫
钉螺
蚴虫成熟
积温
Schistosoma japonicum
Snails
Mature
Growing degree day(GDD)
