陕西关中、陕北地区的恙螨调查

①本文初步报导了陕西关中、陕北地区的啮齿动物体外恙螨幼虫种类的调查及鉴定结果。结果表明:在所捕获的272只恙螨中,共有15个种,分别隶属于恙螨科中的2个亚科7个属。其中须恙螨仅发现于关中地区,且为优势种。本研究注意到恙螨种类分布与地形地貌关系,并作了初步讨论。②本文还探讨了啮齿动物宿主与恙螨的关系。资料表明,被恙螨寄生的8种啮齿动物,小家鼠与黑线姬鼠为优势种,且均恙螨的主要宿主。③本文试图探讨恙螨与流行性出热的关系。仅就所获恙螨区系资料表明:虽然须恙螨仅分布于疫区,但迄今尚无病原学证据,故难作出评价,二者的关系不十分清楚。

Studies on the Funa of Chigger Mites from Northern and Central Shaanxi Provirce

The present survey was carried out during 1955-1973 in Bouji County,Hunglung County as well as Changan County of Shaanxi Province. Two hun-dred and seventy two speciments of chigger mites from rodents in theseareas was determined. Fifteen species of chigger mites belong to two subfa-milies and seven generas, of which eleven specics was found in the Hung-lung area of Northern Shaanxi and ten species in Central Shaanxii, ncludingthe Chouchi, Bouji and Changan areas. The chigger mites, L. palpaliswere a dominant species for Central Shaanxi, but this species does notappear for the Hunglung area of Shaanxi, Province. The other species ofchigger mites found during this survey are recognized as follows: Shunsenia hunglungensis Muitisetosa major Odontacarus majestica Euschongastia indica Euschongastia ikaoensis Euchongastia Spp. Neoschongastia gallinarum Neotrombicula japonica Neotrombicula ichikawai Neotrombicula tamiyai Leptotrombidus scutellariae v. basoglobrosis Leptotrombidus deliensis Leptotrombidus kitasatoi Leptotrombidus hungdi nov spp. On studying the relation between the species distribution of rodent hostsand chigger mites, it has been demonstrated that the Mus musculusand Apodemus agrarius are the dominant species of rodents in these areas. These rodent hosts were parasited by the chigger mites. The results of thissurvey have shown that the chigger mites N. gallinarum was found onlyin wild rabbites. Generally speaking, N. gallinarum only parasites on hensand birds, but can not be found in wild rabbites. So, that is an interest-ing problem and should be investigated further. The relation between haemorrhagic fever and chigger mites has not beenclear up to now. In this paper although the chigger mites L. palpalis wasthe dominant species of chigger mites on Mus musculus and Apodemusagrarius in Central Shaanxi, which is the endemic area of haemorrhagicferer. The haemorrhagic fever virus has not been isolated from chigger mites,including L. palpalis so far. Therefore, the relation between chigger mitesand haemorrhagic fever is not clear.