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1例3岁男孩,威斯康星州人,于1980年5月17 日入院。入院前患孩身体一直健康。早晨,当他试图起床时,跌倒在地。因软弱不稳而不能行走。检查:患孩机灵合作,无发热。两侧轻度中耳炎。坐位时躯干有轻微摇晃。下肢中度驰缓性肌无力,远端甚于近端。虽能在支撑下站立,但不能行走或由坐位站起。痛与振动感觉正常。腱反射:下肢未引出,上肢略有反射存在。抓物时有轻度辩距不良,颅神经功能正常。头皮检查发现一个大而牢固粘着的、吮满血液的壁虱。随即予以除去。以后查明此系一雌性美洲狗壁虱(dermacentor variabilis)。12小时后,患孩即可行走,仅有轻微的运动失调。24小时后检查,肢体已无明显的虚弱或异常。事后,据患孩的母亲告知,患孩曾随其父去威斯康星南中部的家乡
A 3-year-old boy, Wisconsin, was admitted on May 17, 1980. The child’s body has been healthy before admission. In the morning, when he tried to get up, he fell to the ground. Unable to walk because of weakness and instability Check: children clever cooperation, no fever. Mild otitis media on both sides. Torso slightly swaying when sitting. Moderate lower extremity Chi muscle weakness, far more than the proximal end. Although able to stand under the support, but can not walk or stand up from the seat. Pain and vibration feel normal. Tendon reflexes: lower extremities did not lead to the upper extremity slightly reflected existence. Grip when there is a slight bad health, normal cranial nerves. Scalp examination revealed a large, stubborn, blood-sucking tick. Be removed immediately. Later identified as a female dermacentor variabilis. After 12 hours, the child can walk, with only minor motor disturbances. After 24 hours examination, limbs no obvious weakness or abnormalities. Later, according to the child’s mother told the child had with his father to the hometown of southern Wisconsin