患者，男，34岁，山东青岛人，保险行业职员。头痛1月余，因“头痛加重”于2023年5月31日至山东大学齐鲁医院青岛院区就诊，以颅内感染收治入院并给予阿昔洛韦、地塞米松、甘露醇等药物治疗（具体剂量不详），6月18日转诊至山东第一医科大学附属消化病医院。患者自诉曾于2023年5月1日赴云南大理旅游，期间食用螺肉，返回原籍后开始出现头痛并伴周身不适及胸闷症状。入院查体，神志清楚，站立位时头疼明显，饮食、二便正常。血常规提示外周血嗜酸粒细胞数升高（0.86 × 10⁹/L），嗜酸粒细胞百分数升高（10.70%）。患者颅脑CT平扫结果显示，脑实质密度正常，未见异常密度影及占位病变。脑脊液及血样酶联免疫吸附试验检测结果示广州管圆线虫抗体IgG弱阳性，其余寄生虫抗体均阴性。诊断为广州管圆线虫病，给予阿苯达唑[20 mg/（kg•d），3次/d，连续口服7 d]和地塞米松[0.15 mg/（kg•d），静滴3 d]治疗。6月28日，患者头痛症状消失，嗜酸粒细胞数和百分数转归正常值，遂出院。2个月后复查，血液指标正常，广州管圆线虫IgG抗体检查呈阴性，无其他不适。

The patient is a 34-year-old male from Qingdao, Shandong, who works in the insurance industry. He experienced headaches for over a month and visited the Qingdao Branch of Qilu Hospital of Shandong University on May 31, 2023, due to “worsening headaches”. He was admitted for intracranial infection and treated with acyclovir, dexamethasone, and mannitol (specific doses not provided). On June 18, he was transferred to the Affiliated Hospital of Digestive Diseases of Shandong First Medical University. The patient reported travelling to Dali, Yunnan, on May 1, 2023, during which he consumed snail meat. After returning home, he began experiencing headaches, accompanied by general discomfort and chest tightness. Admitted for physical examination, he remained conscious, with significant headaches in an upright position, and had a normal diet and bowel movements. Blood routine tests showed elevated eosinophil count (0.86 × 10⁹/L) and percentage (10.70%). A plain cranial CT scan revealed normal brain parenchyma density with no abnormal density shadows or space-occupying lesions. The ELISA results of cerebrospinal fluid and blood samples showed weakly positive IgG antibodies for Angiostrongylus cantonensis, while other parasite antibody were negative. He was diagnosed with angiostrongyliasis. He was treated with albendazole [20 mg/(kg·d), 3 times a day, continuous oral administration for 7 days] and dexamethasone [0.15 mg/(kg·d) intravenously for 3 days] for treatment. On June 28, the headache symptoms of the patient had disappeared, and his eosinophil count and percentage returned to normal values, and he was discharged. Two months later, a follow-up examination showed normal blood tests, negative IgG antibody tests for A. cantonensis, and no other discomfort.