Ecology and Environment ›› 2021, Vol. 30 ›› Issue (5): 1017-1022.DOI: 10.16258/j.cnki.1674-5906.2021.05.014

• Research Articles • Previous Articles     Next Articles

Distribution Pattern of Antibiotic Resistant Bacteria in Water Supply Reservoirs of Central China

ZHANG Kai1,2(), GUO Ziwei1,2, WANG Qian1,2, HAN Ya1,2, LI Kuangjia3, ZHANG Zhongshuai1,2   

  1. 1. School of Geographic Sciences, Xinyang Normal University, Xinyang 464000, China
    2. Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution/Xinyang Normal University, Xinyang 464000, China
    3. Development Research Center, Ministry of Water Resources of People’s Republic of China, Beijing 100038, China
  • Received:2020-12-09 Online:2021-05-18 Published:2021-08-06

华中地区水库型水源地抗生素抗性细菌的赋存特征研究

张凯1,2(), 郭紫微1,2, 王倩1,2, 韩雅1,2, 李贶家3, 张中帅1,2   

  1. 1.信阳师范学院地理科学学院,河南 信阳 464000
    2.河南省水土污染协同防治重点实验室/信阳师范学院,河南 信阳 464000
    3.水利部发展研究中心,北京 100038
  • 作者简介:张凯(1987年生),男,讲师,博士,研究方向为环境微生物。E-mail:kaizhang1014@163.com
  • 基金资助:
    国家自然科学基金项目(42007209);国家自然科学基金项目(41807038);信阳师范学院"南湖学者奖励计划"青年项目

Abstract:

Bacterial drug resistance caused by antibiotic abuse has aroused widespread concern. Water supply reservoirs, which are closely related to human health, have become a hot spot in antibiotic resistant bacteria researches (ARB). This study selected 11 water supply reservoirs to investigate ARB distribution pattern in water supply reservoirs of central China. The distribution pattern of five types of ARB was analyzed both in the waterbody and sediment of the reservoirs. The results showed that the abundances of tetracycline and sulfanilamide ARB were the highest in both the water and sediment samples, while the abundance of quinolone ARB were the lowest. Mental analysis showed significant positive correlation (P<0.05) between the ARB abundances in sediments and overlying waterbody. The mass exchange between sediments and waterbody might be an important factor leading to this result. The Spearman correlation analysis showed certain correlation among ARBs, and the co-selection of antibiotics might be the underlying reason. The conditional pathogens screened in this study were resistant to a variety of antibiotics, which might pose potential threats to human health. In addition, the lower total heterotrophic bacteria number in reservoirs and the higher bacteria removal efficiency in drinking water plants can ensure the quality of water supply in central China, although the results of this study show that the reservoir sediments are polluted by fecal sources to a certain extent.

Key words: central China, water supply reservoirs, antibiotic resistance bacteria, distribution pattern, surface water, sediment

摘要:

抗生素的滥用导致了细菌耐药性的变化,而水库型水源地抗生素抗性细菌(Antibiotic resistant bacteria,ARB)与人类健康密切相关。为明确华中地区水库型水源地中ARB的赋存特征,选取华中地区11个大型水库型水源地为研究对象,分析了5类ARB在水和沉积物中的分布规律。结果表明,华中地区水库型水源地水和沉积物中,丰度最高的ARB均以四环素类ARB及磺胺类ARB的丰度最高,喹诺酮类ARB在本研究最低。Mantel分析结果表明,沉积物和上覆水中ARB丰度呈显著性正相关(P<0.05),沉积物和水中的物质交换可能是导致这一结果的重要因素。Spearman相关性分析结果表明ARB之间存在一定的相关性,抗生素的共选择作用可能是造成这一结果的潜在因素。研究中筛选的条件致病菌分别对多种抗生素均具有抗性,可能会对人体健康产生潜在威胁。此外,虽然该研究的结果表明水库沉积物在一定程度上受到粪源污染,但华中地区水库环境较低的总异养菌数和饮用水厂较高的细菌去除效率在一定程度上能够保证供水质量。

关键词: 华中地区, 水库型水源地, 抗生素抗性细菌, 赋存特征, 上覆水, 沉积物

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