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春末夏初是各种硬蜱稚虫寻找吸食哺乳类宿主血液的高峰季节。当硬蜱吮吸血时可传播伯氏(burgdorferi)包柔氏螺旋体,而引起目前遍及全世界的表现为多系统损害的莱姆病。莱姆病的早期症状出现于蜱叮咬后1周内,表现为流感样症状,但伴有迅速扩展的皮肤损害——慢性游走性红斑(ECM)。数周或数月后可出现慢性的关节、心脏及神经系统并发症。虽然ECM为急性莱姆病的临床特征,但也并不总是出现。与美国病例相比,欧洲病例出现ECM者很少。无ECM的病例很难确诊为急性莱姆病,在这些病例
Early spring and early summer is a variety of hard tick nymphs looking for suckling mammals host blood peak season. Hard ticks can spread burgdorferi spirochete when they suck blood, causing the disease that is now Lyman disease that is present throughout the world and that is multi-systemly impaired. Early symptoms of Lyme disease appear within 1 week after the tick bite, showing flu-like symptoms but with rapidly expanding skin lesions - chronic migratory erythema (ECM). Chronic joint, heart, and nervous system complications can occur weeks or months later. Although ECM is a clinical feature of acute Lyme disease, it does not always appear. Compared with the United States cases, there are very few ECM cases in Europe. Cases without ECM are difficult to diagnose with acute Lyme disease in these cases