Linnemann C C, Barber L C, Dine M S, Body A E
Am J Dis Child. 1978 Jan;132(1):40-2. doi: 10.1001/archpedi.1978.02120260042011.
Tick-borne relapsing fever is endemic in the western part of the United States, but it has not been reported east of the Mississippi River. Sporadic cases have been reported in the eastern part of the United States, but travel to the West during the incubation period appeared to provide the source of infection. In the fall of 1975, a case of relapsing fever was diagnosed in Cincinnati in a child who had not traveled outside of Ohio, indicating the presence of Borrelia in this area. Serial serological studies indicated that B turicatae was the species involved. The occurrence of this case suggests that relapsing fever may exist in the eastern part of the United States, but its presence may not be appreciated because of the rarity of the disease and the difficulty in confirming the diagnosis.
蜱传回归热在美国西部为地方性疾病，但密西西比河以东地区尚未有病例报告。美国东部曾有散发病例报告，但在潜伏期前往西部似乎是感染源。1975年秋季，辛辛那提市诊断出一例回归热病例，该患儿未曾离开俄亥俄州，这表明该地区存在疏螺旋体。系列血清学研究表明，涉及的菌种为杜氏疏螺旋体。该病例的出现提示回归热可能存在于美国东部，但由于该病罕见且诊断困难，其存在可能未被察觉。
