有一种尴尬,叫旅行者腹泻

2017-07-20 陈泉峰 掌上医讯

你想想,出去旅游,游山玩水,正在兴头上,你却内急拉肚子,到处找卫生间,那该多尴尬呀。当我们遇到这种情况,很多人都认为这是“水土不服”了。其实这样说并不完全正确,这也是一种疾病,而且有一个专门的医学术语--旅行者腹泻。说道腹泻,大家都知道在夏季是个常见病,多为饮食不当造成的急性腹泻。虽然很多人都有过外出旅行出现腹泻的经历,但具体谈到旅行者腹泻似乎大家还对它不是太了解,今天笔者就为大家聊一聊这个话

你想想,出去旅游,游山玩水,正在兴头上,你却内急拉肚子,到处找卫生间,那该多尴尬呀。

当我们遇到这种情况,很多人都认为这是“水土不服”了。其实这样说并不完全正确,这也是一种疾病,而且有一个专门的医学术语--旅行者腹泻。

说道腹泻,大家都知道在夏季是个常见病,多为饮食不当造成的急性腹泻。虽然很多人都有过外出旅行出现腹泻的经历,但具体谈到旅行者腹泻似乎大家还对它不是太了解,今天笔者就为大家聊一聊这个话题。

1、旅行者腹泻的定义是什么?

说道“水土不服”那可不是国人专属,30多年前西方医学家发现,从发达地区前往发展中地区旅游或工作的人,有40-60% 都会闹拉肚子,于是就把这种旅行期间或旅行后出现的,每天3次及以上大便未成形,或未成大便次数不定但伴有发热、腹痛、恶心呕吐及便中带血等症状的情况,命之名为“旅行者腹泻”(Travelers』 diarrhea, TD)。TD其实是感染性腹泻的一种特殊类型,其定义还可推广至症状轻微但足以影响商务日程或旅行计划的各种肠道紊乱。

2、旅行者腹泻的致病病原体包括哪些?

一般的感染性腹泻,也就是平时让我们拉肚子的,以病毒居多,只有少数是细菌,但是旅行者腹泻的病原体90%以上都是细菌,主要是因为不洁饮食,感染各种细菌、病毒、寄生虫、真菌等,其中细菌是导致成人旅行者腹泻的罪魁祸首,以肠产毒性大肠杆菌(ETEC)最常见。世界范围内大概有一半的旅行者腹泻病例由此种细菌引起,紧随其后病原菌的还有 ETEC 的近亲——肠侵袭性大肠杆菌(EAEC)以及其他细菌,而各种肠道病毒是儿童腹泻的常见病原,由寄生虫而导致腹泻的情况要比细菌、病毒少见一些,但在卫生条件比较差的地区,人们感染寄生虫的概率会更高。

3、旅行者腹泻的常见临床表现有哪些?

旅行者腹泻的病原体 主要来自于污染的水和食物。进入体内后可以潜伏数日再发病,大多数旅行者腹泻发生在到达目的地后的 4-14 天内;有些人在结束旅行后才出现症状。当然如果你误食的病菌越多,你发病的时间也可能越短。旅行者腹泻的临床表现根据病原体的不同有所差异:

(1)腹泻,肚子痛,精神差,不想吃东西。由ETEC、EAEC、霍乱弧菌、病毒等导致旅行者腹泻,通常有这些表现。这是因为这些病原体大多为非侵袭性病原体,感染主要局限于小肠,发烧等全身中毒症状并不明显。

(2)总是想去蹲卫生间,大便稀、带脓血,一般是感染了志贺菌、沙门菌、空肠弯曲菌等侵袭性病原体,肠道病变明显,可发展为结肠炎导致肠粘膜脱落,而出现这样的症状。

(3)总体来说,旅行者腹泻是一种自限性疾病,多数患者的症状都在 1-5 天自行缓解。但也有少部分患者症状持续时间可超过1个月,这有可能主要是由一些寄生虫导致的。

4、旅行者腹泻的易感因素包括哪些?

是否发生旅行者腹泻主要取决于有多少病菌侵入,并突破层层阻碍,成功在人体肠道安家、繁衍生息。旅行者腹泻的易感因素包括下面这些:

(1)环境因素:街边小摊上食物污染的风险很高,在高级社交场合中食物常暴露于温暖环境,也容易诱发旅行者腹泻。海滩度假和航海旅游时胃肠不适的发生率比陆地旅游低,但乘客和船员在航海旅游中更易出现难以控制的诺沃克病毒大爆发。

(2)季节因素:旅行者腹泻的发生具有季节性,夏季发病率高,炎热的夏季、持续强降雨的汛期,极易导致水源的污染或食物变质,因而也最容易发生腹泻,相对来说冬季发生率较低。

(3)宿主因素:年轻旅游者更易患旅游者腹泻,无性别差异,贪吃的吃货们,见什么吃什么,摄入更多病菌,风险也就更高;长期服用抗酸制剂的胃肠病人群,胃酸分泌相应减少,病菌容易逃过胃酸杀灭这一劫;免疫缺陷者不能针对攻击肠道的病菌很好地发挥免疫功能,而使得病菌轻易在肠道安家;舟车劳顿容易降低人们的免疫力,这时候细菌容易乘虚而入;小于6岁的孩童,本身免疫功能尚未健全,成为易感人群;长期居住在高度工业化地区者,对发展中地区的微生物缺乏免疫力也是易感因素。

婴幼儿患者的病情更严重且需要住院治疗。居住在旅行者腹泻高发区及暴露于ETEC可使旅行者产生部分免疫。但服用免疫抑制药物并不能改变发病情况。

5、旅行者腹泻的常规诊断方法有哪些?

根据患者旅游地的流行病学史,发病季节,临床表现和大便性状易于做出临床诊断,同时必须判定有无脱水(程度和性质),电解质紊乱和酸碱失衡等,注意寻找病因,具体包括以下几个方面:

(1)准确收集流行病学资料,包括:询问患者腹泻前饮食,饮水,起居与用药情况;了解患者既往疾病,大便习惯,工作及环境情况;查明患者所在地相同饮食者腹泻情况;(4)了解当地循环的致病菌谱,流行菌(毒)株和群体免疫状况。

(2)客观认识临床征象,重点把握下列临床资料:①腹泻的起病方式与病程经过。②腹泻的频率,性状及时间规律。③腹泻的伴随症状与体征。④腹部体征包括压痛,反跳痛,肠鸣音等。⑤患者全身状况包括神志意识,血压,脉搏与皮肤弹性。

(3)合理选择辅助实验室检查:医生须仔细地肉眼观察以了解腹泻患者的粪便性状与变化,不仅仅凭化验报告,这样才能做出正确的判断,根据粪便性状可决定病变部位如:水样便,无里急后重,病变多在小肠;黏液便,病变多在结肠;黏液带果酱色血便,病变多在上段结肠;桃花红样脓血便,病变多在下段结肠;粪便表面带血或伴明显里急后重,病变多在直肠或末端结肠,粪便性状也可判断病变性质:水样便,无炎性细胞,病变多为非侵袭性;黏液脓血便,炎细胞甚多,病变多为侵袭性。

6、旅行者腹泻该怎样治疗吗?

(1)DT为自限性疾病,不需特殊处理而自愈。

(2)旅行者发生腹泻时,应禁食8~12小时,部分患者可能因为腹泻导致脱水和体内电解质紊乱,应及时补充电解质液,病情严重者应住院治疗。

(3) 如果每日腹泻超过四次或伴有发热、粘液便、脓血便等情况,需尽快就医,做相关检查以明确致病原因,选择合适的抗生素进行治疗。对于细菌性腹泻,现多选用氟喹诺酮类抗生素,微生态疗法有助于恢复肠道正常菌群的生态平衡,抑制病原菌定植和侵袭,有利于控制腹泻,常用双歧杆菌,嗜乳酸杆菌和粪链球菌制剂。肠黏膜保护剂能吸附病原体和毒素,维持肠细胞的吸收和分泌功能,与肠道黏液糖蛋白相互作用可增强其屏障功能,阻止病原微生物的攻击,如蒙脱石(思密达)。

(4)由隐孢子虫、环孢子虫等引起的DT,如果患者免疫功能健全,症状多较轻,一般无需化学药物治疗,给予支持和对症治疗即可。对于由真菌引起的DT,在支持和对症治疗的同时,应积极进行抗菌治疗。病毒性腹泻大都为自限性,对小儿与衰弱者应注意纠正脱水。

(5)止泻药的应用:腹泻次数多着可适当使用阿片类药物(如洛哌丁胺)通过抑制肠蠕动,增进Na+、Cl-协同转运的间接作用或抑制由钙依赖性促分泌素诱导的分泌的直接作用,减少水和电解质的丢失,宜在医生指导下用药。

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    2017-07-24 雅文博武

    学习了很多先进的技术水平

    0

  3. [GetPortalCommentsPageByObjectIdResponse(id=1693036, encodeId=6d8a1693036f2, content=<a href='/topic/show?id=655a4e32160' target=_blank style='color:#2F92EE;'>#尴尬#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=47321, encryptionId=655a4e32160, topicName=尴尬)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=4b6529322635, createdName=yilong5287552, createdTime=Wed May 23 00:36:00 CST 2018, time=2018-05-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=225775, encodeId=8e8f225e75dd, content=学习了很多先进的技术水平, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20161027/IMG58114E1818EA51495.jpg, createdBy=4b2c1959822, createdName=雅文博武, createdTime=Mon Jul 24 11:43:38 CST 2017, time=2017-07-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=225054, encodeId=f6252250548f, content=学习了,谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3zSn0GqHrsfLGSUSR8zwnWWLT4FMl5XH8S58HuZslVkLsAPbXDXaliagK7TOxQfmngKibG1yrDonepCLDkcxGk8hS/0, createdBy=b8282062892, createdName=changjiu, createdTime=Sat Jul 22 10:47:48 CST 2017, time=2017-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=224866, encodeId=825d22486686, content=感谢小编为我们精心准备了如此精辟的精神大餐,小编辛苦了,点个赞吧!, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Sat Jul 22 06:23:46 CST 2017, time=2017-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=224747, encodeId=339a224e470b, content=谢谢你哈, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJpBl6xwMmnsKibwxcAIltOH3nnCEQbNE6TDbYtCKe8hYI0oJrbduNqnJraM1PyyjPKU1suAzicYPaA/132, createdBy=eeaf2031798, createdName=海之蓝, createdTime=Fri Jul 21 20:44:41 CST 2017, time=2017-07-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=224699, encodeId=02de22469980, content=学习一下知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160718/IMG578C993D395567540.jpg, createdBy=59b81918946, createdName=flysky120, createdTime=Fri Jul 21 18:06:06 CST 2017, time=2017-07-21, status=1, ipAttribution=)]
    2017-07-22 changjiu

    学习了,谢谢

    0

  4. [GetPortalCommentsPageByObjectIdResponse(id=1693036, encodeId=6d8a1693036f2, content=<a href='/topic/show?id=655a4e32160' target=_blank style='color:#2F92EE;'>#尴尬#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=47321, encryptionId=655a4e32160, topicName=尴尬)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=4b6529322635, createdName=yilong5287552, createdTime=Wed May 23 00:36:00 CST 2018, time=2018-05-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=225775, encodeId=8e8f225e75dd, content=学习了很多先进的技术水平, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20161027/IMG58114E1818EA51495.jpg, createdBy=4b2c1959822, createdName=雅文博武, createdTime=Mon Jul 24 11:43:38 CST 2017, time=2017-07-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=225054, encodeId=f6252250548f, content=学习了,谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3zSn0GqHrsfLGSUSR8zwnWWLT4FMl5XH8S58HuZslVkLsAPbXDXaliagK7TOxQfmngKibG1yrDonepCLDkcxGk8hS/0, createdBy=b8282062892, createdName=changjiu, createdTime=Sat Jul 22 10:47:48 CST 2017, time=2017-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=224866, encodeId=825d22486686, content=感谢小编为我们精心准备了如此精辟的精神大餐,小编辛苦了,点个赞吧!, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Sat Jul 22 06:23:46 CST 2017, time=2017-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=224747, encodeId=339a224e470b, content=谢谢你哈, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJpBl6xwMmnsKibwxcAIltOH3nnCEQbNE6TDbYtCKe8hYI0oJrbduNqnJraM1PyyjPKU1suAzicYPaA/132, createdBy=eeaf2031798, createdName=海之蓝, createdTime=Fri Jul 21 20:44:41 CST 2017, time=2017-07-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=224699, encodeId=02de22469980, content=学习一下知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160718/IMG578C993D395567540.jpg, createdBy=59b81918946, createdName=flysky120, createdTime=Fri Jul 21 18:06:06 CST 2017, time=2017-07-21, status=1, ipAttribution=)]
    2017-07-22 ylzr123

    感谢小编为我们精心准备了如此精辟的精神大餐,小编辛苦了,点个赞吧!

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=1693036, encodeId=6d8a1693036f2, content=<a href='/topic/show?id=655a4e32160' target=_blank style='color:#2F92EE;'>#尴尬#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=47321, encryptionId=655a4e32160, topicName=尴尬)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=4b6529322635, createdName=yilong5287552, createdTime=Wed May 23 00:36:00 CST 2018, time=2018-05-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=225775, encodeId=8e8f225e75dd, content=学习了很多先进的技术水平, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20161027/IMG58114E1818EA51495.jpg, createdBy=4b2c1959822, createdName=雅文博武, createdTime=Mon Jul 24 11:43:38 CST 2017, time=2017-07-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=225054, encodeId=f6252250548f, content=学习了,谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3zSn0GqHrsfLGSUSR8zwnWWLT4FMl5XH8S58HuZslVkLsAPbXDXaliagK7TOxQfmngKibG1yrDonepCLDkcxGk8hS/0, createdBy=b8282062892, createdName=changjiu, createdTime=Sat Jul 22 10:47:48 CST 2017, time=2017-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=224866, encodeId=825d22486686, content=感谢小编为我们精心准备了如此精辟的精神大餐,小编辛苦了,点个赞吧!, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Sat Jul 22 06:23:46 CST 2017, time=2017-07-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=224747, encodeId=339a224e470b, content=谢谢你哈, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJpBl6xwMmnsKibwxcAIltOH3nnCEQbNE6TDbYtCKe8hYI0oJrbduNqnJraM1PyyjPKU1suAzicYPaA/132, createdBy=eeaf2031798, createdName=海之蓝, createdTime=Fri Jul 21 20:44:41 CST 2017, time=2017-07-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=224699, encodeId=02de22469980, content=学习一下知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160718/IMG578C993D395567540.jpg, createdBy=59b81918946, createdName=flysky120, createdTime=Fri Jul 21 18:06:06 CST 2017, time=2017-07-21, status=1, ipAttribution=)]
    2017-07-21 海之蓝

    谢谢你哈

    0

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    2017-07-21 flysky120

    学习一下知识

    0

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