Arnold R B, Gary G W
Trans R Soc Trop Med Hyg. 1977;71(2):152-4. doi: 10.1016/0035-9203(77)90085-2.
5-8% of 434 sera collected in Lassa village, Nigeria, in August 1970 were positive by neutralization test for Lassa fever (LF) virus. A second survey in March 1971 found 15 of 47 complete compounds tested in Lassa, Dille and Yuba villages had at least one peron with serologically demonstrable experience with LF virus. 67% of positive compounds had more than one infected member. Four of 17 hospital staff sero-converted between August 1970 and March 1971 without symptoms, evidence that subclinical infections of LF occr.
1970年8月在尼日利亚拉萨村采集的434份血清中，有5 - 8%通过拉沙热（LF）病毒中和试验呈阳性。1971年3月的第二次调查发现，在拉萨、迪勒和尤巴村检测的47份完整样本中，有15份至少有一人血清学检测显示曾感染过LF病毒。67%的阳性样本中有不止一名感染者。1970年8月至1971年3月期间，17名医院工作人员中有4人无症状血清转化，这证明LF会发生亚临床感染。
