Cirera P, Palisson M J, Pinerd G, Jaeger G
Bull Soc Pathol Exot Filiales. 1977 Jan-Feb;70(1):32-6.
A serologic survey on 196 blood samples (20% of the present population) in a Bi-Aka pygmean population in Central African Republic. The survey demonstrated the frequency of the unquestionably positive sera: 79.4% of the studied sera. The existence of 78.5% positive sera in children and the observation of yaws lesions suggest a massive and very probably endemic infestation with Treponema pertenue.
对中非共和国俾格米族Bi-Aka人群中的196份血样（占现有人口的20%）进行了血清学调查。该调查显示，明确呈阳性的血清频率为：所研究血清的79.4%。儿童中78.5%的血清呈阳性，以及观察到雅司病病变，这表明存在大量且极有可能为地方性的品他密螺旋体感染。
