吉林省抚松、珲春地区莱姆病调查

Investigation of Lyme Disease in Forest Areas of Fusong and Hunchun Counties in Jilin Province

1989年5～6月在吉林省抚松县境内的松江河林业局白西林场及珲春县长岭子地区,用人工布旗法扑获游离蜱。从13组(260只)全沟硬蜱中分离出8株疏螺旋体,其形态、运动、免疫学特征及动物试验等均与伯氏疏螺旋体标准株(B_(31))相同。4组(120只)嗜群血蜱未分离出疏螺旋体。在当地发现1例慢性游走性红斑病人,伴有发热及感冒样症状,于发病后两周,血清莱姆病抗体效价达1:128(IFA法)。在105名健康林业工人及家属中,血清菜姆病抗体效价≥1:8者占10.5％。上述结果表明,抚松、珲春林区存在莱姆病的自然疫源地。

An investigation of Lyme disease was conducted in the forest areas of Fusong and Hunchun counties in Jilin province from May to June 1989. Ticks were collected by flagging. Eight strains of Borrelia burgdorferi were isolated from Ixodes persulcatas, none from Haemaphysalis concinna. The group positive rate of Ⅰ. persulcatus is about 61.5％. The morphological, motional and immunological characteristics of spirochetes isolated from ticks were similar to those of standard strain (B31) of B. burgdorferi. One patient with erythema chronicum migrans was found in the studied areas. The patient was positive for the antibody to B, burgdorferi. 11(10.5％) out of 105 forest workers and residents had IgG antibody titers (≥1: 8) to B. burgdorferi. The results show that natural focus of Lyme disease exists in the studied areas.