Vernile A, Nabi A Q, Bonadonna L, Briancesco R, Massa S
Department of Food Science, Agricultural Faculty of Foggia, University of Foggia, via Napoli 25, 71100, Foggia, Italy.
Environ Monit Assess. 2009 May;152(1-4):203-7. doi: 10.1007/s10661-008-0308-4. Epub 2008 Jun 5.
A total of 21 samples: raw water (RW) samples; water samples after coagulation with aluminium sulfate (clarified water: CW); and water after chlorination (treated water: TW) from a water purification plant that treats river surface water from the neighbourhood of Foggia (Italy), were analysed for the presence of Giardia cysts and Cryptosporidium oocysts. Bacteriological indicator of faecal contamination (total and faecal coliforms, faecal streptococci,), total bacterial count at 22 and 36 degrees C and physicochemical parameters (turbidity, temperature, pH) were evaluated. Cryptosporidium oocysts were not found in any samples examined, while Giardia cysts were found only in RW samples, with the maximal concentration of 8 cysts/100 l. A positive correlation was found between the Giardia densities and quality parameters such as TC, FC and TBC at 22 degrees C. Giardia levels in raw water samples correlated (p < 0.05) with TC, FC and with temperature. No other water quality parameters was consistently correlated with cysts level.
对来自意大利福贾附近一家处理地表水的净水厂的总共21个样本进行了分析，以检测贾第虫包囊和隐孢子虫卵囊的存在，这些样本包括：原水（RW）样本；用硫酸铝混凝后的水样（澄清水：CW）；以及氯化后的水（处理后水：TW）。评估了粪便污染的细菌学指标（总大肠菌群和粪大肠菌群、粪链球菌）、22℃和36℃下的总细菌数以及理化参数（浊度、温度、pH值）。在所检测的任何样本中均未发现隐孢子虫卵囊，而仅在原水样本中发现了贾第虫包囊，最大浓度为8个包囊/100升。在22℃时，贾第虫密度与总大肠菌群、粪大肠菌群和总细菌数等水质参数之间存在正相关。原水样本中的贾第虫水平与总大肠菌群、粪大肠菌群以及温度相关（p < 0.05）。没有其他水质参数与包囊水平持续相关。
