caa a22 4500 47710584X CHVBK 20180405111553.0 cr unu---uuuuu 170330e19960101xx s 000 0 eng 10.1007/BF01569925 doi (NATIONALLICENCE)springer-10.1007/BF01569925 Survival of protozoa in cooling tower biocides [Elektronische Daten] [E Sutherland, S Berk] Protozoa from cooling towers may serve as hosts for legionellae, but such protozoa have not been examined with respect to effects of cooling tower biocides. In this study, two ciliate species,Tetrahymena sp andColpoda sp, and two amoebae species,Vannella miroides andAcanthamoeba hatchetti, were isolated from a cooling tower and tested for survival in the presence of four cooling tower biocides. The protozoa were exposed for 24 h to a thiocarbamate compound, an isothiazolone compound, quaternary ammonium compounds (QAC), and tributyltin neodecanoate with quarternary ammonium compounds (TBT/QAC). After exposure, cells were examined for viability. The highest concentration of each biocide in which cells could survive was compared to the manufacturers' recommended maintenance dosage (MRMD) of the biocides.Tetrahymena andColpoda survived concentrations within the range of the MRMD of thiocarbamate and QAC.Vannella andAcanthamoeba survived concentrations within the MRMD of thiocarbamate, isothiazolone, and QAC.Colpoda cysts andAcanthamoebae cysts remained viable after exposure to concentrations much greater than the MRMD of thiocarbamate, isothiazolone, and QAC. None of the protozoa in any stage could survive the MRMD of TBT/QAC. These results show that protozoa indigenous to cooling towers may survive the recommended concentration of certain biocides, and this information may be important in devising procedures for eradicating hosts for legionellae. Society for Industrial Microbiology, 1996 cooling tower nationallicence biocides nationallicence amoebae nationallicence ciliates nationallicence protozoa nationallicence legionellae nationallicence Sutherland E. Center for the Management, Utilization, and Protection of Water Resources, Tenessee Technological University, Box 5033, 38505, Cookeville, TN, USA aut Berk S. Center for the Management, Utilization, and Protection of Water Resources, Tenessee Technological University, Box 5033, 38505, Cookeville, TN, USA aut Journal of Industrial Microbiology Springer-Verlag 16/1(1996-01-01), 73-78 0169-4146 16:1<73 1996 16 10295 https://doi.org/10.1007/BF01569925 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01569925 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sutherland E. Center for the Management, Utilization, and Protection of Water Resources, Tenessee Technological University, Box 5033, 38505, Cookeville, TN, USA aut NATIONALLICENCE 700 1- Berk S. Center for the Management, Utilization, and Protection of Water Resources, Tenessee Technological University, Box 5033, 38505, Cookeville, TN, USA aut NATIONALLICENCE 773 0- Journal of Industrial Microbiology Springer-Verlag 16/1(1996-01-01), 73-78 0169-4146 16:1<73 1996 16 10295 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer