van der Wielen Paul W J J, Dignum Marco, Donocik Agata, Prest Emmanuelle I
KWR Water Research Institute, 3433 PE Nieuwegein, The Netherlands.
Laboratory of Microbiology, Wageningen University & Research, 6708 WE Wageningen, The Netherlands.
Microorganisms. 2023 Jun 14;11(6):1574. doi: 10.3390/microorganisms11061574.
High drinking water temperatures occur due to climate change and could enhance the growth of opportunistic pathogens in drinking water systems. We investigated the influence of drinking water temperatures on the growth of , , and in drinking water biofilms with an autochthonous microflora. Our results reveal that the growth of and in the biofilm already occurred at 15.0 °C, whereas and were able to grow when temperatures were above 20.0 °C and 25.0 °C, respectively. Moreover, the maximum growth yield of , and increased with increasing temperatures up to 30 °C, whereas an effect of temperature on the yield of could not be established. In contrast, the maximum ATP concentration of the biofilm decreased with increasing temperatures. We conclude from these results that high drinking water temperatures caused by, e.g., climate change can result in high numbers of , and in drinking water systems, which poses a possible risk to public health. Consequently, it is recommended for countries with a more moderate climate to use or maintain a drinking water maximum standard temperature of 25 °C.
气候变化导致饮用水温度升高，这可能会促进饮用水系统中机会致病菌的生长。我们研究了饮用水温度对含有本地微生物群落的饮用水生物膜中[具体细菌名称未给出]、[具体细菌名称未给出]、[具体细菌名称未给出]和[具体细菌名称未给出]生长的影响。我们的结果表明，生物膜中[具体细菌名称未给出]和[具体细菌名称未给出]在15.0℃时就已开始生长，而[具体细菌名称未给出]和[具体细菌名称未给出]分别在温度高于20.0℃和25.0℃时能够生长。此外，[具体细菌名称未给出]、[具体细菌名称未给出]和[具体细菌名称未给出]的最大生长产量随着温度升高至30℃而增加，而温度对[具体细菌名称未给出]产量的影响尚未确定。相反，生物膜的最大ATP浓度随温度升高而降低。我们从这些结果得出结论，例如气候变化导致的高饮用水温度会使饮用水系统中[具体细菌名称未给出]、[具体细菌名称未给出]和[具体细菌名称未给出]数量增加，这对公众健康构成了潜在风险。因此，建议气候较为温和的国家使用或维持25℃的饮用水最高标准温度。
