Hantula J, Kurki A, Vuoriranta P, Bamford D H
Department of Genetics, University of Helsinki, Finland.
Appl Environ Microbiol. 1991 Aug;57(8):2147-51. doi: 10.1128/aem.57.8.2147-2151.1991.
Little is known about the endemic bacteriophages of activated sludge. In this investigation 49 virus-host systems were studied by isolating co-occurring bacteria and bacteriophages from the aeration basin of a sewage treatment plant during 5 successive weeks. The phage titers were high and fluctuated during the time period. The occurrence of phage-sensitive and -resistant hosts did not depend on the presence or absence of phages. Several phage-host systems expressed variable plating efficiencies. In addition, phages with broad host ranges were observed. These results show that phages are an active part of this ecosystem and that they may exert selection pressure for phage resistance on their bacterial host populations.
关于活性污泥中的地方性噬菌体，人们了解甚少。在本研究中，通过在连续5周内从一家污水处理厂的曝气池中分离共生细菌和噬菌体，对49个病毒-宿主系统进行了研究。噬菌体滴度很高，且在这段时间内波动。噬菌体敏感宿主和抗性宿主的出现并不取决于噬菌体的存在与否。几个噬菌体-宿主系统表现出可变的平板效率。此外，还观察到了具有广泛宿主范围的噬菌体。这些结果表明，噬菌体是这个生态系统的活跃组成部分，并且它们可能对其细菌宿主种群施加噬菌体抗性选择压力。
