Monfort P, Baleux B
Laboratoire d'Hydrobiologie Marine et Continentale, Université des Sciences et Techniques du Languedoc, Montpellier, France.
Appl Environ Microbiol. 1990 Jul;56(7):1999-2006. doi: 10.1128/aem.56.7.1999-2006.1990.
The spatiotemporal dynamics of Aeromonas spp. and fecal coliforms in the sewage treatment ponds of an urban wastewater center were studied after 20 months of sampling from five stations in these ponds. Isolation and identification of 247 Aeromonas strains were undertaken over four seasons at the inflow and outflow of this pond system. The hemolytic activity of these strains was determined. The Aeromonas spp. and the fecal coliform distributions showed seasonal cycles, the amplitude of which increased at distances further from the wastewater source, so that in the last pond there was an inversion of the Aeromonas spp. cycle in comparison with that of fecal coliforms. The main patterns in these cycles occurred simultaneously at all stations, indicating control of these bacterial populations by seasonal factors (temperature, solar radiation, phytoplankton), the effects of which were different on each bacterial group. The analysis of the Aeromonas spp. population structure showed that, regardless of the season, Aeromonas caviae was the dominant species at the pond system inflow. However at the outflow the Aeromonas spp. population was dominated by A. caviae in winter, whereas Aeromonas sobria was the dominant species in the treated effluent from spring to fall. Among the Aeromonas hydrophila and A. sobria strains, 100% produced hemolysin; whereas among the A. caviae strains, 96% were nonhemolytic.
在城市污水处理中心的污水处理池的五个站点进行了20个月的采样后，研究了气单胞菌属和粪大肠菌群在这些池塘中的时空动态。在该池塘系统的进水口和出水口的四个季节中，对247株气单胞菌进行了分离和鉴定。测定了这些菌株的溶血活性。气单胞菌属和粪大肠菌群的分布呈现季节性循环，其幅度在离废水源更远的距离处增加，因此在最后一个池塘中，气单胞菌属的循环与粪大肠菌群的循环相比发生了反转。这些循环中的主要模式在所有站点同时出现，表明这些细菌种群受季节性因素（温度、太阳辐射、浮游植物）的控制，这些因素对每个细菌群体的影响不同。气单胞菌属种群结构分析表明，无论季节如何，豚鼠气单胞菌都是池塘系统进水口的优势种。然而在出水口，冬季气单胞菌属种群以豚鼠气单胞菌为主，而从春季到秋季，温和气单胞菌是处理后流出物中的优势种。在嗜水气单胞菌和温和气单胞菌菌株中，100%产生溶血素；而在豚鼠气单胞菌菌株中，96%是非溶血的。
