2016～2017年娄底市包装饮用水中铜绿假单胞菌检验结果分析

Analysis of test result of Pseudomonas aeruginosa in packaged drinking water in Loudi city in 2016～2017

目的了解娄底市辖区内包装饮用水中铜绿假单胞菌污染状况,为监管部门日常监管和安全饮水提供理论依据。方法 2016~2017年在娄底辖区内从生产、流通环节采集包装饮用水共计383份,按照相应国家标准检测铜绿假单胞菌和大肠菌群。结果水样微生物指标总合格率为85.12%。饮用纯净水微生物指标均符合GB19298-2014《食品安全国家标准包装饮用水》标准要求。2016年和2017年桶装水中铜绿假单胞菌检出率分别为22.16%和13.64%,年度铜绿假单胞菌检出率差异无统计学意义(χ~2=1.310,P>0.05);大肠菌群的检出率为2.35%,与铜绿假单胞菌检出率比较,差异有统计学意义(χ~2=52.712,P<0.01);所有检出阳性样品中,具有蓝、绿色典型阳性菌特征菌落比例为87.72%;样品采集来源与样品合格率之间无统计学意义,2016年(χ~2=0.060,P>0.05),2017年(χ~2=0.839,P>0.05)。结论桶装水存在铜绿假单胞菌污染隐患,监管部门应加大监督管理力度,配合企业查找问题源头,保证消费者饮水安全。

Objective To understand the pollution status of Pseudomonas aerugina （P. aeruginosa） in packaged drinking water in Loudi city, and provide theoretical basis for the daily supervision of the supervision department and safe drinking water. Methods 383 samples were collected from the production and circulation in Loudi in 2016-2017, and P. aeruginosa and coliform in water were detected according to the national standards methods. Results The total qualified rate was 85.12%. The microbiological indexes of purified drinking water were in accordance the standard requirements of GB 19298-2014 Food safety national standard packaged drinking water. The detection rates ofP. aeruginosa in barreled drinking water were 22.16% and 13.64% in 2016 and 2017, respectively. There was no statistical significance between the detection rate of P. aeruginosa annually （χ^2=1.310, P 〉 0.05）. The detection rate of coliform was 2.35%. There was statistical significance on the difference when it was compared to the detection rate ofP. aeruginosa （χ^2=52.712, P 〈 0.01）.The ratio of typical positive bacteria accounted for 87.72% of all the positive samples. There was no statistical significance between the collection source and the detection rate： 2016 （χ^2=0.060, P〉0.05） and 2017 （χ^2=0.839, P〉0.05）o Conclusion P aeruginosa in barreled drinking water is evaluated to be a risk factor of healthy. The supervision department should strengthen supervision and management, cooperate with enterprises to find the source of problems and ensure the safety of drinking water for consumers.