Two suspected cases of Borrelia infection after the infestation of Haemaphysalis flava and Ixodes persulcatus.
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We report here two cases of the infestation by ixodid ticks. In both cases the patients developed high serum titers to <I>B. burgdorferi</I>, but did not show typical migrating erythema. Case 1 : A 5-year-old girl had tick bites on the left occipital region and developed fever (38°C) and multiple swollen lymph nodes on the left side of the neck. The tick was removed and identified as <I>Haemaphysalis flava</I>. After treatment with antibiotics, the fever subsided and the lymph nodes gradually decreased in size. The IgG antibody titers to <I>B. burgdorferi</I> examined by an ELISA using <I>B. burgdorferi</I> antigens, HO14 and HP3, were significantly high. Case 2 : A 60-year-old woman had a sticking tick on the occipital region with local skin rash, indulation, and pain after travelling in Hokkaido. The tick was removed and identified as <I>Ixodes persulcatus</I>. After treatment with antibiotics, these symptoms disappeared. The IgG antibody titers to <I>B. burgdorferi</I> antigens were significantly high. In both cases, serological tests for syphilis and micro-scopic agglutination tests using different antigens obtained from seven serovars of <I>Leptospira interrogans</I> were negative. These findings suggest that both patients were infected with <I>B. burgdorferi</I>, but the symptoms were suppressed by the early treatment with antibiotics. <I>H. flava</I> found in one of the patients has not been reported as a vector for <I>B. burgdorferi</I>. Further investigations are necessary to examine the possibility.
- 日本熱帯医学会の論文
日本熱帯医学会 | 論文
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