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１９９１～１９９２年本文对青海西部地区６个乡土著蒙古族游牧牧民４５４例、农业区蒙古族土著居民１６９例，应用间接血凝试验的方法，筛选出游牧牧民蜱传出血热血清抗体阳性一例，阳性率为０．２％。以免疫荧光试验、酶联免疫试验重复证实均为阳性。地理流行病学的调查，在绵羊血清中也已观察到蝉传出血热抗体阳性。西部地区为辽阔的荒漠、半荒漠、半草原地带，有适合蜱传出血热中间宿主蜱的生态环境。本次调查提示我省西部地区有蜱传出血热的自然疫源地及对人的感染性。
From 1991 to 1992, 454 Mongolian nomadic herders in six western areas of Qinghai Province and 169 Mongolian indigenous people in the agricultural area were selected for indirect hemagglutination test. One case of positive antibody to tick-borne hemorrhagic fever was screened out by indirect hemagglutination test. The positive rate was 0.2%. Immunofluorescence test, enzyme-linked immunosorbent assay repeatedly confirmed positive. Epidemiological epidemiological investigations have also shown positive for cicada hemorrhagic fever antibodies in sheep sera. The western region is a vast desert, semi-desert, semi-grassland zone, suitable for tick-borne hemorrhagic fever intermediate host tick ecological environment. The survey prompted the western part of our province have natural hemorrhagic fever flies epidemic and human infectivity.