Płoneczka-Janeczko Katarzyna, Rypuła Krzysztof, Rohm Witold, Magdziarz Marcin, Zielak-Steciwko Anna
Department of Epizootiology With Clinic for Birds and Exotic Animals, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Pl. Grunwaldzki 45, 50-366, Wrocław, Poland.
Institute of Geodesy and Geoinformatics, Faculty of Environmental Engineering and Geodesy, Wrocław University of Environmental and Life Sciences, Grunwaldzka 53, 50-357, Wrocław, Poland.
Sci Rep. 2025 May 25;15(1):18182. doi: 10.1038/s41598-025-03001-y.
In 2024, Poland experienced severe flooding linked to the Genoa low. Flooding can lead to the spread of waterborne diseases and other public health risks, associated with shifts in bacterial communities. This study aimed to characterize the bacterial community in the topsoil layer one week after the floodwaters receded in recreational areas of the Wrocław metropolitan region, Poland. MALDI-TOF mass spectrometry combined with bacteriological culture were used for bacteria identification. Soil samples (n = 66) were collected (September 2024) from 11 locations. At each location samples were collected in triplicates, in both flooded and non-flooded areas. A total of 46 bacterial species were identified, with greater diversity in the flooded topsoil, where 18 unique species (including more potentially pathogenic ones) were observed compared to those found only in non-flooded areas. The bacterial community structure varied across flooded areas, with decreased frequency of Bacillus cereus and Bacillus thuringiensis detection. This finding indicates that after flood disaster recreational zones may pose potential public health risks associated with pathogenic microorganisms. Such areas seem to require prolonged examination due to post-flooded changes in the natural soil composition as well as the presence of post-flooded soil organic matter that may promote growth of selected microorganisms.
2024年，波兰遭遇了与热那亚低压相关的严重洪灾。洪水可能导致水传播疾病的传播以及其他公共卫生风险，这与细菌群落的变化有关。本研究旨在对波兰弗罗茨瓦夫大都市地区休闲区洪水退去一周后的表层土壤中的细菌群落进行特征描述。采用基质辅助激光解吸电离飞行时间质谱（MALDI-TOF）结合细菌培养法进行细菌鉴定。2024年9月从11个地点采集了土壤样本（n = 66）。在每个地点，在洪水淹没区和非洪水淹没区均采集了一式三份的样本。共鉴定出46种细菌，洪水淹没的表层土壤中细菌多样性更高，与仅在非洪水淹没区发现的细菌相比，在洪水淹没的表层土壤中观察到18种独特的细菌（包括更多潜在致病细菌）。细菌群落结构在不同的洪水淹没区有所不同，蜡样芽孢杆菌和苏云金芽孢杆菌的检出频率降低。这一发现表明，洪灾过后，休闲区可能存在与致病微生物相关的潜在公共卫生风险。由于洪水过后天然土壤成分发生变化，以及洪水后土壤有机质的存在可能促进某些微生物的生长，这些区域似乎需要进行长期监测。
