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日本血吸虫分布在我国的台湾省和大陆,60年代以来经各学者的研究结果,认为台湾和大陆两地日本血吸虫肯定有地域株的区别,但大陆日本血吸虫是否再有地域株之分,尚不能肯定。鉴于中国幅员广大,各流行地区血吸虫有无种以下生物特异性差异,值得进一步研究。本文就不同水系分布和专区划分,选用四川的天全、肩山、西昌、德阳四地区血吸虫株 相似文献
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作者等曾经报道曼氏血吸虫尾蚴穿透哺乳动物皮肤的机制中有前列腺素(PGS)参与,本实验进一步观察日本血吸虫尾蚴穿透小鼠皮肤过程中的PGS参与及PGS抑制剂对尾蚴穿透的影响。本实验结果可以初步看出,日本血吸虫尾坳穿透小鼠皮肤后 相似文献
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日本血吸虫尾蚴穿透皮肤机理的探讨及其预防药物的筛选 总被引:3,自引:0,他引:3
Mice pretreated with PG cyclo-oxygenase inhibitor aspirin, at 300 mg/kg/d x 5, and ibuprofen, at 100 mg/kg/d x 5 orally and 20 mg/kg/d x 3 intraperitoneally revealed moderate chemoprophylactic effects and the reduction of the penetration of worms by 23% when compared to controls. Daily oral administration of aspirin, at 300 mg/kg for 15 days the worms reduction increased to 41.7%. In estimation of PGE1 in cercariae of S. japonicum by radioimmunoassay, the PGE1 was 49 pg/100 cercariae. In normal mouse skin PGE1 has been measured to amount to 3105 +/- 691.7 pg/10 mg on average. In cercarial penetrated mouse skin, 1.5 hours after exposure the PGE1 assessed in 100 and 250 cercariae in the infected skin were 5506 +/- 1127.1 and 12085 +/- 2622.9 pg/10 mg respectively, which were significantly higher than that of the non-penetrated skin. These studies in conjunction with our previous work indicate that: 1.PGs, similar to S. mansoni, were probably necessary for cercarial penetration. 2.PG inhibitors could reduce cercarial penetration. Receptors antagonist etc. e.g. diphenhydramine, chlorpheniramine, atropine, practolol could not reduce cercarial penetration, but praziquantel in the pretreated mice could reduce cercarial penetration significantly. e.g. 400 mg/kg orally 2 hours prior to affection of cercariae about 100% reduction of the penetration, but if pretreated with praziquantel, 4, 8, 24, 36 hours prior to the affection the reduction penetration decreased to 51.7, 46.1, 9.4, 8.9% respectively. 相似文献
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作者用放射免疫法,测定感染日本血吸虫尾蚴的小鼠皮肤中前列腺素E_1(PGE_1)的含量。结果感染组的PGE_1显著高于正常对照组(P<0.01),且随感染尾蚴的数量增加而增加。使用7种PG抑制剂,其中阿斯匹林、布洛芬及消炎痛有一定预防尾蚴穿透作用,4种受体阻断剂无明显预防作用。抗血吸虫药吡喹酮400mg/kg,感染前2h减虫率最佳,用药至感染时间愈长,其预防作用愈弱。作者对以上结果进行了讨论,认为日本血吸虫尾蚴穿透皮肤的过程中,有PGE_1参与。前列腺素抑制剂具有一定的预防尾蚴穿透皮肤的作用。 相似文献