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(来源:腾讯新闻)
\n\n简单来说,布鲁氏菌病是一种细菌感染性疾病,病原体就叫“布鲁氏菌”,这种细菌可以从动物传播给人类。
\n\n布鲁氏菌有几种不同的菌株。有些类型可以在奶牛身上找到,其他的则出现在狗、猪、绵羊、山羊和骆驼身上,红狐和包括海豹在内的某些海洋动物身上也发现过布鲁氏菌。
\n\n但在我国,布鲁氏菌主要有 4 型,羊布鲁氏菌、猪布鲁氏菌、牛布鲁氏菌、犬布鲁氏菌[1]。
\n\n布鲁氏菌很少会在人与人之间直接传播,绝大多数布鲁氏菌病例是由动物传播给人的。布鲁菌病可通过进食未经检疫带菌的动物肉、奶,或通过呼吸道吸入该菌造成感染,如果黏膜或皮肤有破损接触布鲁氏菌,也会造成感染[3]。
\n\n(显微镜下的布鲁氏菌)
\n\n此次兰州兽医研究所内出现的布鲁氏菌病是从什么动物身上传染给所内师生的,目前尚不清楚。
\n\n但在知乎上,有认证身份为“中国农业科学院在读博士”的答主分享答案时称,在 2019 年 11 月中旬左右,该院研究生在进行动物实验时,发现实验用的小鼠身上感染了布鲁氏菌。
\n\n随后,参与实验的师生紧急到医院检测,血清学检测发现 2 人阳性,感染了布鲁氏菌病(消息待进一步证实)。
\n\n在感染了布鲁氏菌后,通常会有 1~3 周的潜伏期,之后有的人会突然发病,表现为畏寒、发热、关节痛、头痛、后背痛,少数人伴有腹泻。而还有症状较轻的人,起病比较隐匿,没有什么明显症状。
\n\n此次兰州兽研所染病的师生们,基本都是症状比较隐匿的,症状不明显。
\n\n在感染布鲁氏菌病后,如果早期发现,比如在感染半年之内早期确诊并规范治疗,90% 的患者可以治愈。但如果诊断不及时,比如超过半年,或者治疗不规范,布鲁氏菌病很容易复发,或转为慢性感染,迁延难愈。
\n\n在治疗方法方面,医生一般会使用抗生素治疗,而且一般会采用联合应用两种或两种以上抗生素的方法。
\n\n首选的一般是利福平 + 多西环素的治疗方案,链霉素、环丙沙星、氧氟沙星、磺胺甲恶唑/甲氧苄氨嘧啶、四环素等抗生素也有效。
\n\n如果是儿童感染布鲁氏菌,则一般选择磺胺甲恶唑/甲氧苄氨嘧啶治疗,必要时使用利福平。治疗需要持续 6~8 周,一定要足量、足疗程用药才行[1]。
\n\n没有得到控制的严重布鲁氏菌病可能会造成中枢神经感染、心内膜炎、关节严重损伤等严重并发症。
\n\n此外,布鲁氏菌病会偏向侵害生殖系统,造成男性睾丸炎,女性输卵管炎、卵巢炎等感染性疾病,还可能导致孕妇流产和婴儿出生缺陷[2]。这对此次事件中受感染的大多数年轻学生而言,可能是最让人担心的了。
\n\n总之,在现有科学技术条件下,控制此次布鲁氏菌感染并不困难,只要在专业指导下对感染者进行早期、足量、足疗程进行抗生素治疗,同时彻查细菌播散路径,清楚感染源并切断感染途径,相信此次事件可以很快解决。
\n\n但我们是否应该反思,我们是否放松了对人畜共患病的戒心,轻视了对动物,尤其是常见动物的检疫,忘记了这些动物是可能将疾病传染给我们的。
\n\n几年前,东北某高校也曾出现布鲁氏菌感染事件,原因就是忽视了对实验动物的检疫,造成多人受到布鲁氏菌感染。
\n\n所以,不要忽视细节,尤其是已经习以为常的方面,按照规矩办事,才能保护自己不受伤害。
\n\nPS:此次事件一出,有不少网友提问,布鲁氏菌病既然在牛羊中有传播,那牛羊肉还能吃么?牛奶还能喝么?
\n\n其实,经过正规检疫的牛羊肉是肯定没有感染布鲁氏菌的,放心吃就是了;正规途径出售的牛奶不但经过检疫,还经过杀菌消毒,也不会有布鲁氏菌。
\n\n需要提醒的是,如果是未经检疫的牛羊肉,或者未经任何处理的生牛羊奶,就无法保证其中没有布鲁氏菌了,所以追求新鲜也要适度。
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