小盾纤恙螨体内肾综合征出血热病毒增殖的初步研究

Preliminary studies on proliferation of hemorrhagic fever with renal syndrom virus in Leptotrombidium (L.) Scutellare

为进一步观察小盾纤恙螨感染肾综合征出血热病毒（ＨＦＲＳＶ）后的体内增殖，直接取饲养的小盾纤恙螨幼虫和若虫，每２０天为一批制成无菌滤液，接种Ｖｅｒｏ－Ｅ６细胞测定ＴＣＩＤ５０／ｍｌ滴度，动态观察ＨＦＲＳＶ在螨体内的增殖。结果表明：在小盾纤恙螨幼虫期除采集至测定６０天批未测出ＨＦＲＳＶ滴度和未分离到ＨＦＲＳＶ外，其余１２批均在不同时间内测出ＨＦＲＳＶ滴度和分离到ＨＦＲＳＶ，滴度均在１０－１～１０－５之间。３批若虫亦有２批测出ＨＦＲＳＶ滴度和分离到ＨＦＲＳＶ，滴度为１０－５。所分离的ＨＦＲＳＶ用ＰＣＲ扩增技术亦检测出ＨＦＲＳＶＲＮＡ。这为小盾纤恙螨作为ＨＦＲＳ的传播媒介提供了进一步的证据。

In order to observe furtherly the proliferation and kinetic changes of hemorrhagic fever with renal syndrom virus (HFRSV) in Leptotrombidium (L.) Scutellare infected with HFRSV, the raised Leptotrombidium (L.) Scutellare which were at larve stage or at nymph stage were grinded and sterilized by filteration at interval of 20 days, each batch of the filtrate was inoculated separately to Vero E6 cells and the titre (TCID50/ml) of HFRSV was measured. The results confirmed: HFRSV were isolated from each batch of larve besides the batch at the 60th days, and the titre of HFRSV was 10 -1 -10 -4 ; HFRSV were also isolated from two batches of nymph. The isolated HFRSV were amplified by PCR technique and the HFRSV RNA were positive. The above results give rise to evidence that Leptotrombidium (L.) Scutellare might be the transmission vector of HFRSV.