蠕虫病 ,也称为蠕虫感染 ,是人和其他动物一部分身体被寄生蠕虫感染导致的一种巨噬细胞 疾病。这些寄生虫种类很多,大致分为絛蟲 、吸蟲 和线虫 。它们通常生活在宿主的胃肠道中,但也可能钻入其他器官,引起生理损伤。
土源性蠕虫病 和血吸虫病 是最重要的蠕虫病,属于被忽视热带病 [ 1] 。2012年,世界领先的制药工程 和非政府组织 共同启动了一项名为“被忽视热带病伦敦宣言”的项目,旨在到2020年控制或根除某些被忽视的热带病[ 2] 。
目前已发现蠕虫病会导致婴孩产出不良、认知发育不良、学业和工作表现不佳、社会经济发展不良以及贫困[ 3] [ 4] 。其它次要影响包括慢性病、營養不良 和贫血 [ 5] 。
土源性蠕虫病 是造成全世界四分之一的寄生虫感染的原因[ 6] 。此类病的一个典型例子是蛔虫病 。
迹象和症状
蠕虫病的症状取决于许多因素,包括感染部位、蠕虫类型、蠕虫数量、蠕虫体积、伤害类型、免疫反应等。如果身体供给物质和能量给寄生虫的负担很轻,则可能没有任何症状。某些蠕虫可能会导致特定的症状,例如绦虫可导致癫痫 发作[ 7] 。
临床照片示例:几内亚蠕虫感染(麦地那龙线虫病 ),蠕虫从感染者的脚下钻出
由于蛔虫的感染导致腸系膜破裂
质量和体积
在肠道感染的极端情况下,蠕虫的质量和体积如过大则可能导致肠壁外层(例如肌肉层)撕裂,进而可能导致肠道腹膜炎、肠扭转和坏疽[ 8] 。
免疫反应
蠕虫作为病原体可诱导产生免疫反应,皮肤、肺、肝、肠、中枢神经系统 和眼睛可发生免疫介导炎症变化。身体免疫反应迹象可能包括水肿 、关节炎 和嗜酸性粒细胞增多[ 9] 。例如蛔虫幼虫通过肺部 支气管 迁移可引起哮喘 [ 10] 。
流行病学
死亡
每年有多达135,000人死于土源性蠕虫病[ 3] [ 11] [ 12] 。
1990至2013年全球疾病负担研究 估计血吸虫病直接致死人数为5,500人[ 13] ,而2013年估计有超过20万人死因与血吸虫病有关[ 14] 。此病另外还对2000万人造成严重后果[ 15] ,是被忽视热带病中最致命的一种[ 16] 。
参考资料
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Information related to 蠕虫病