广西钦州市桶装饮用水铜绿假单胞菌污染状况及影响因素

目的了解钦州市桶装饮用水铜绿假单胞菌污染状况,为保障饮水安全提供科学依据。方法在钦州市各经销商购买未开封的桶装水作为监测组,在不同场所中选定261台饮水机,并分别采集经饮水机冷水口、未经饮水机的桶装水作为对照组,进行饮水机加热试验,同时开展问卷调查,按照GB 4789.3-2016、GB 8538-2016分别检测大肠菌群和铜绿假单胞菌。结果监测组和对照组样品均未检出大肠菌群,铜绿假单胞菌检出率分别为0(0/50)、26.4%(69/261),对照组不同场合铜绿假单胞菌检出率差异无统计学意义(P>0.05),不同清洗时间、不同换水频次、不同加热温度,铜绿假单胞菌检出率差异有统计学意义(P<0.05)。结论钦州市桶装饮用水使用过程中受到不同程度铜绿假单胞菌污染和二次污染,存在饮水安全隐患。建议加强宣传教育,正确使用饮水机,完善相关法规、加大监管等以降低食品安全风险。

Pollution status and influencing factors of Pseudomonas aeruginosa in barreled drinking water in Qinzhou,Guangxi

Objective To investigate the contamination status of Pseudomonas aeruginosa in barreled drinking water in Qinzhou City, and to provide scientific basis for the safety of drinking water. Methods The unopened barreled water from the dealer in Qinzhou was selected as the monitoring group, and the barreled water collected from drinking machine cold water mouth and without flowing through water dispenser in 261 water dispensers in different locations was taken as the control group, and the drinking machine heating test and the questionnaire survey was simultaneously carried out. Coliform bacteria and Pseudomonas aeruginosa were detected according to GB 4789.3-2016 and GB 8538-2016 standards respectively. Results Coliform bacteria was not detected in the monitoring group and the control group samples, but the detection rate of Pseudomonas aeruginosa in the monitoring group and the control group samples were respectively 0 (0/50) and 26.4% (69/261). There was no significant difference in the detection rate of Pseudomonas aeruginosa for the barreled water from different locations in the control group (P>0.05); there were significant differences in the detection rate of Pseudomonas aeruginosa for barreled water from water dispensers in different locations with different cleaning times, different water exchange frequency and different heating temperature (P<0.05). Conclusions The use of barreled drinking water in Qinzhou is contaminated by Pseudomonas aeruginosa and secondary pollution in different degrees, and there is a hidden safety danger of drinking water. It is suggested that the publicity and education should be strengthened, the water dispenser should be properly used, the relevant laws and regulations should be perfected, and the supervision of the food safety should be reduced to reduce the risk of food safety.