Centre for Environment, Fisheries & Aquaculture Science (Cefas), Aquatic Health and Hygiene Division, Food Safety Group, Weymouth Laboratory, Weymouth, Dorset DT4 8UB, UK.
Mar Pollut Bull. 2013 Feb 15;67(1-2):223-7. doi: 10.1016/j.marpolbul.2012.11.030. Epub 2012 Dec 20.
Temporal trends in Escherichia coli concentrations in bivalve shellfish were examined using data collected from 57 production areas around the coast of England and Wales during 1999-2008. Downward trends were detected in annual geometric means of E. coli in shellfish from 12% of the sampling points. The percentage of class B areas (E. coli ≤ 4600/100 g shellfish in 90% of samples) increased from 69% to 86% during the 10-year period. The improvement in the microbial quality of shellfish is associated with sewerage improvement schemes largely implemented during 2000-2005. Upward trends were detected in 9% of the points. The causes of these increases are not known. It is recommended that quantitative sanitary profiling of shellfish waters and cost-benefit appraisal over long-term planning horizons are considered as part of sewerage investment programmes under the Water Framework Directive. This would allow greater scope to secure protection and improvement of shellfish water quality.
利用 1999 年至 2008 年期间在英格兰和威尔士沿海 57 个生产区采集的数据，研究了双壳贝类中大肠杆菌浓度的时间变化趋势。在 12%的采样点，检测到贝类中大肠杆菌年几何平均值呈下降趋势。在这 10 年期间，B 类区域（贝类中大肠杆菌≤4600/100 克）的比例从 69%增加到 86%。贝类微生物质量的改善与主要在 2000 年至 2005 年期间实施的污水改善计划有关。在 9%的采样点检测到上升趋势。这些增加的原因尚不清楚。建议在《水框架指令》下的污水投资计划中，考虑对贝类水域进行定量卫生分析，并对长期规划进行成本效益评估。这将为贝类水质的保护和改善提供更大的空间。
