欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2022, Vol. 33 ›› Issue (6): 1719-1728.doi: 10.13287/j.1001-9332.202210.029

• 综合评述 • 上一篇    

畜禽养殖废物中抗生素和重金属抗性基因的产生机制和控制方法研究进展

李晓天, 黄焯燊, 汤有千, 林昌权, 王春铭*   

  1. 华南农业大学资源环境学院, 广州 510642
  • 收稿日期:2021-07-21 接受日期:2022-03-17 发布日期:2022-12-15
  • 通讯作者: *E-mail: mirian88@scau.edu.cn
  • 作者简介:李晓天, 男, 1998年生, 硕士研究生。主要从事固体废物处理处置研究。E-mail: tiantian614169314@163.com
  • 基金资助:
    广东省教育厅重点领域专项项目(2021KJZL0016)、广东省科技厅科技计划项目 (2021B1212040008)和广州市科技局民生科技攻关项目(201903010084)资助。

Generation mechanism and control methods of antibiotic and heavy metal resistance genes in poultry waste: A review

LI Xiao-tian, HUANG Zhuo-shen, TANG You-qian, LIN Chang-quan, WANG Chun-ming*   

  1. College of Resources and Environment, South China Agricultural University, Guangzhou 510642, China
  • Received:2021-07-21 Accepted:2022-03-17 Published:2022-12-15

摘要: 动物饲料中常混有抗生素和重金属,导致外排的动物粪便中携带有抗生素和重金属,引发细菌产生耐药性和重金属抗性,继而产生抗生素抗性基因和重金属抗性基因。抗生素和重金属抗性基因污染已成为威胁人类身体健康及破坏生态环境的重大问题。本文从细菌进化的角度,明确了细菌的抗生素和重金属长期进化试验对抗性机制研究的重要性;抗生素抗性基因与重金属抗性基因间存在复杂的协同选择抗性,两者间相互影响,共同决定着细菌环境行为;抗性基因的水平转移增加了细菌在环境中的可变性,可移动遗传元件在抗性基因水平转移中发挥着重要作用。在抗性基因污染控制方面,高级氧化技术具有很好的抗性基因去除效果,尤其是UV/TiO2氧化技术,能使抗生素抗性基因丰度减少4.7~5.8 log,减少率大于99.99%。其他的控制策略,如抗生素替代品博落回提取物以及噬菌体与抗生素结合使用,对于抗性基因的控制也具有重要意义。

关键词: 重金属, 基因水平转移, 可移动遗传元件, 控制技术

Abstract: As antibiotics and heavy metals are often mixed in animal feed, their excretion through animal feces would cause bacteria to produce antibiotic resistance genes and heavy metal resistance genes. The pollution of antibiotics resistance gene and heavy metal resistance gene has become a major threat to human health and ecological environment. From the perspective of bacterial evolution, we proposed the importance of bacterial long-term evolution experiments about antibiotics and heavy metals. There is a complex co-selection resistance between antibiotic resistance genes and heavy metal resistance genes, which interact with each other and collectively determine the environmental behavior of bacteria. Horizontal transfer of resistance gene increases its variability in the environment. Mobile genetic elements play an important role in horizontal transfer of resistance gene. As for resistance gene pollution control, advanced oxidation technology has a good resistance gene removal effect. The UV/TiO2 oxidation technology can reduce the abundance of antibiotic resistance genes of 4.7-5.8 log, with an efficiency of >99.99%. Other control strategies, such as the use of Macleaya cordata extract and the combination of bacteriophage and antibiotics, are also of significance for controlling resistance genes.

Key words: heavy metal, horizontal gene transfer, integrative and conjugative elements, control technology