Abstract

The environment is considered a reservoir of pathogens and a possible source of infection for animals and humans. The association between enteric pathogens and food plants has been demonstrated in several studies, while few studies have addressed possible interactions between human pathogens and aquatic plants. This study, performed by setting mesocosms, evaluates the interaction between an enteric pathogen (Salmonella enterica serovar Napoli, S. Napoli) and a macrophyte (Phragmites australis (Cav.) Trin. ex Steudel) and the possible ability of the bacterium to internalize into the plant. The results show that S. Napoli concentration decreased gradually in growth solution without plants (control) while it was able to persist adhering to submerged parts of plants in treated mesocosms. The adhesion of the bacterium remained stable for 20 days, then decreased gradually until the end of the experiment. In addition, S. Napoli was able to internalize and colonize stems and leaves. In conclusion, the study suggests that macrophytes can represent an alternative environmental reservoir of pathogens for humans and animals. The adhesion to roots and rhizomes and the internalization could contribute to the bacterial persistence in the aquatic ecosystems by playing an important role in ecology and transmission of pathogens.

摘要

环境被认为是病原体的储存库，是动物和人类感染的可能来源。肠道病原体与食用植物之间的关联已在数项研究中得到证明，而很少有研究涉及人类病原体与水生植物之间可能的相互作用。这项研究中，通过设置围隔执行，评估的肠道病原体之间（相互作用肠沙门氏菌血清变型那不勒斯，S.那不勒斯）和水生植物（芦苇（CAV）三正。前Steudel）和细菌的内化到可能的能力植物。结果表明，S。在没有植物的情况下，那不勒斯的浓度在生长溶液中逐渐降低（对照），而在处理过的中膜中，那不勒斯能够持续粘附在植物的淹没部分上。细菌的粘附力保持稳定20天，然后逐渐降低，直到实验结束。此外，S。那不勒斯是能够内化和殖民统治的茎和叶。总之，该研究表明，大型植物可以代表人类和动物的病原体的替代环​​境库。根与根茎的粘附和内在化可通过在病原体的生态学和传播中发挥重要作用，促进细菌在水生生态系统中的持久性。