筛查结果被忽视 结核从“潜伏”到“爆发”|久久国产成人精品Av
两年前一次学校的结核病筛查中,初中女生阳阳(化名)被测出了“阳性”结果。这本是“潜伏感染”的重要警报,意味着结核菌已潜入体内,但被免疫系统暂时围困。但她和家人并未当回事。两年后当阳阳再次走进诊室,胸部CT片已清晰显示:左上肺出现典型结核病灶,甚至可能已累及支气管,从“潜伏感染”已进展为“活动性肺结核”。值得注意的是,她仍然几乎没有症状。
“没有症状是最大陷阱”
“当时的阳阳,没有任何症状,完全意识不到潜伏的健康问题。如果她能听从医生建议,进行预防性治疗,就能极大降低发病风险。”南京市第二医院汤山分院结核科主任医师曾谊说。
“潜伏感染”和“活动性肺结核”,二者有什么区别吗?对此,曾谊打了个比方:我们的身体像一个王国,结核杆菌是入侵的敌人。“筛查阳性”表示敌人已潜入国内(感染),但被我们的国防军(免疫系统)包围在堡垒里,无法作乱(没有发病)。而“活动性肺结核”则意味着敌人冲破了防线,在国内到处破坏,引发了战争(出现症状,肺部出现病灶,并可能传染他人)。
“没有症状反而是最大的陷阱。”曾谊指出,这种被称为亚临床结核的状态,具有极强隐匿性。患者本人难以察觉,但肺部病灶已在悄悄进展,甚至已具备潜在传染性。
感染后前2年是关键窗口
曾谊介绍,感染结核杆菌后,一生中约有5%~10%的风险会发展为活动性肺结核。其中,绝大多数发生在感染后的2年内,这正是干预和预防的“黄金窗口期”,预防性治疗可降低90%以上的发病风险。遗憾的是,阳阳没有进行任何预防性治疗,学业压力大、作息不规律,这些因素可能导致免疫力暂时下降,成为结核病发病的导火索。
更遗憾的是,此时的治疗成本比潜伏期高了不少,治疗周期更长,服用药物更多。“如果两年前干预,仅需1~2种药物,服药3个月,副作用小,几乎不影响学业和生活。而现在需要4种以上药物,疗程至少6~9个月,药物副作用叠加,且可能留下长期肺部损伤。”
通讯员 朱诺 扬子晚报/紫牛新闻记者 吕彦霖
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