目平外睾吸虫日本血吸虫不同间隔时间双重感染湖北钉螺螺体血淋巴细胞存在情况的比较

Comparison between the existence states of the hemo-lymphocytes in Oncomelania hupensis snails dually infected by larval Exorchis mupingensis and Schistosoma japonicumat different intervals

目的外睾吸虫与日本血吸虫双重感染湖北钉螺,后进入螺体的血吸虫幼虫全部被击毁,双重感染间隔时间愈长,血吸虫幼虫被击毁的效力愈强烈。为要了解钉螺血淋巴细胞在所有螺体存在及进入血吸虫幼虫体内情况是否相同,开展了本实验观察。方法与结果共检查双重感染间隔时间21d、37d、55d、70d、85d5组不同时龄的血吸虫幼虫50条。50条血吸虫幼虫周围螺组织大中小3种血淋巴细胞总数:大143粒、中386粒、小219粒;血吸虫幼虫体内3种血淋巴细胞总数:大40粒、中65粒、小60粒;两者总数:大183粒、中451粒、小279粒;每条血吸虫幼虫体及其周围的平均数为:大3.7粒、中9粒、小5.6粒。5组每种血淋巴细胞平均数及百分比情况如下:间隔21d:9(45%)、15.9(35%)、7.4(27%);间隔37d:4.1(21%)、11(24%)、7.8(29%);间隔55d:3.6(18%)、8.6(18%)、5.2(19%);间隔70d:2(10%)、7.9(17%)、3.4(13%);间隔85d:1.2(6%)、2.9(6%)、3.1(11%)。结论显示间隔时间愈长,大中小3种血淋巴细胞数均逐步下降。

Present manuscript reports the result of comparison between the numbers of hemo lymphocytes in snail tissue and abnormal larval Schistosoma japonicum body in Oncomelania hupensis which were dually infected with larval Exorchis mupingensis （Jiang, 2011） and S. japonicum for different intervals. The total number of 3 types（large, medium and small） hemo-lymphocytes in snail tissue around 50 S. japonicum larvae were respectively 143, 386, 219;and the total number of 3 types of hemo-lymphocytes in 50 S. japonicum larval bodies respectively were 40, 65, 60;their total number were respectively 183, 451, 279 and their total average number in snail of each S. japonicum larva were respectively 3.7, 9, 5.6. Each type of hemo-lymphocytes number and its percentage in 5 dually infected snails with different interval are as follows： 21 days interval： 9 （45%）, 15.9 （35%）, 7.4 （27%）% 37 days interval： 4.1 （21%）, 11 （24%）, 7.8 （29%）; 55 days interval： 3.6 （18%）, 8.6 （18%）, 5.2 （19%%）% 70 days interval： 2 （10%0）, 7. 9 （17%）, 3. 4 （13%）; 85 days interval： 1. 2 （6%）, 2. 9 （6%）, 3.1 （11%）. The result indicated that hemo-lymphocytes numbers and their percentage in O. hupensis snails dually infected for longer intervals were fewer and lower than that for shorter intervals.