软下疳
一种不常见的细菌感染引起的性传播疾病。
病原体：杜克雷嗜血杆菌，一种革兰阴性杆菌。潜伏期：2至10天。地域分布于东南亚、非洲、印度次大陆和南美洲。男性发病率超过女性发病率的10倍。
¤ 疼痛性溃疡，边缘潜行，炎症反应明显。有时皮损多发，常见于外生殖器区。质地柔软，伴有痛性腹股沟淋巴结肿大。
¤ 混合性溃疡=软下疳+ 硬下疳（梅毒性溃疡）。
依据涂片直接镜检：革兰阴性杆菌成鱼群样排列、细菌培养和核酸扩增检测。
1．头孢曲松钠，250mg，肌肉注射，一次治疗。
2．阿奇霉素，1g，一次口服。
3．环丙沙星，500mg，每天2次，口服 3天。
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