Obiri-Danso K, Okore-Hanson A, Jones K
Department of Biological Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
Lett Appl Microbiol. 2003;37(4):334-9. doi: 10.1046/j.1472-765x.2003.01403.x.
The aim of this study was to assess the microbiological quality of Ghanaian bottled and plastic-bagged drinking water sold on the streets of Metropolitan Kumasi, Ghana.
Eight bottled, 88 factory-filled plastic sachet and 40 hand-filled hand-tied polythene-bagged drinking waters were examined for the presence of heterotrophic bacteria total viable counts (TVCs), indicators of faecal contamination (total coliforms, faecal coliforms and enterococci) and for lead, manganese and iron. Heterotrophic bacteria were found in all three types of water with TVCs per millilitre ranging from 1 to 460 for bottled water, 2-6.33 x 10(5) for factory-bagged sachet water and 2.33 x 10(3)-7.33 x 10(12) for hand-filled hand-tied bagged water. None of the microbial indicators of faecal contamination were detected in bottled water, whereas 4.5% of the factory-bagged sachets contained total coliforms and 2.3% faecal coliforms, and 42.5% of the hand-filled hand-tied bags contained total coliforms, 22.5% faecal coliforms and 5% enterococci. Iron was found in all three types of drinking water but at concentrations well within the WHO recommendations. Lead and manganese were not detected.
Ghanaian bottled water is of good microbiological quality but some factory-bagged sachet and hand-filled hand-tied polythene-bagged drinking water are of doubtful quality.
Factory-bagged sachets and hand-filled hand-tied bags of drinking water sold in Ghana should be monitored for microbiological contamination, with the aim of raising standards in the industry and re-assuring the public.
本研究旨在评估在加纳库马西大都会街头售卖的加纳瓶装和塑料袋装饮用水的微生物质量。
对8瓶瓶装水、88袋工厂灌装的塑料袋装水和40袋手工灌装并系好的聚乙烯袋装饮用水进行检测，以确定其中是否存在异养细菌、总活菌数（TVC）、粪便污染指标（总大肠菌群、粪大肠菌群和肠球菌）以及铅、锰和铁的含量。在所有三种类型的水中均发现了异养细菌，每毫升瓶装水的TVC范围为1至460，工厂袋装水为2 - 6.33×10⁵，手工灌装并系好的袋装水为2.33×10³ - 7.33×10¹²。瓶装水中未检测到任何粪便污染的微生物指标，而4.5%的工厂袋装水中含有总大肠菌群，2.3%含有粪大肠菌群，42.5%的手工灌装并系好的袋中含有总大肠菌群，22.5%含有粪大肠菌群，5%含有肠球菌。在所有三种类型的饮用水中均检测到铁，但浓度远低于世界卫生组织的建议值。未检测到铅和锰。
加纳瓶装水的微生物质量良好，但一些工厂袋装和手工灌装并系好的聚乙烯袋装饮用水质量存疑。
应对加纳售卖的工厂袋装和手工灌装并系好的袋装饮用水进行微生物污染监测，以提高该行业的标准并让公众放心。
