此前,人们认为无菌环境是预防术后感染的最关键因素。然而,德国维尔茨堡马克斯·普朗克系统免疫学研究小组的Mercedes Gomez de Agüero团队最近与瑞士伯尔尼大学医院合作进行的一项研究表明,危险的来源显然完全不同:患者的肠道。
When bacteria, fungi, mosses, lichens and algae combine on dry land, they form so-called biological soil crusts. These cover about twelve percent of the total global land surface, and up to one third of the surface in dry areas. Biological soil crusts play an important role in consolidating soils, making them more stable and less likely to be stirred up by the wind. Since dust particles in the atmosphere have an impact on the climate, soil crusts fulfil an important function in several respects. An international team of researchers around biologist Bettina Weber of the University of Graz and research associate of the Max Planck Institute for Chemistry provide, for the first time, comprehensive facts and figures on the importance of biological soil crusts for the regional and global dust cycle, both under current and future conditions.
根据约翰·霍普金斯大学布隆伯格公共卫生学院的研究人员的一项研究,导致常见食物中毒症状的细菌菌株通常含有一种毒素,这种毒素会破坏肠道细胞中的DNA,可能引发结肠癌癌症。这一发现增加了一种可能性,即全球每年约200万例癌症新病例中,有一些来自短暂且看似温和的食物中毒事件。它还指出了未来通过中和新发现的毒素UshA来预防结直肠癌的药物的可能性。研究结果于1月12日发表在《癌症发现》1月版上。先前的研究表明,肠道中的某些细菌可以通过涉及慢性肠道炎症的持续感染引发癌症。导致食物中毒的短期感染,包括旅行者腹泻,通常在一两天内消退,传统上被认为是非癌性的