Abstract
Pathogenic and non-pathogenic free-living amoebae from an activated-sludge plant were investigated. The greatest species diversity occurred in the raw, settled sewage and at the beginning of the aeration tank, whilst the lowest number of species occurred in the final sedimentation tanks. Thirteen species of free-living amoebae representing eleven genera were isolated; these included three species of Acanthamoeba (A. castellanii, A. culbertsoni and A. polyphaga), all of wich were pathogenic to mice with varying degrees of virulence. The implications for the public health risk of the presence of pathogenic free-living amoebae in activated-sludge plants are discussed.
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References
Červa, L.: 1973, Prog. Protozool., Proceedings of the 4th International Congress on Protozoology, 2–9 September 1973, Clermont Ferrand, p. 83.
Curds, C. R.: 1973, Amer. Zool. 13, 161.
Curds, C. R.: 1975, Protozoa in C. R. Curds and H. A. Hawkes (eds.), Ecological Aspects of Used-Water Treatment I. The Organisms and their Ecology, Academic, London, pp. 203–268.
Curds, C. R.: 1982, Ann. Rev. Microbiol. 36, 27.
De Jonckheere, J. F.: 1977, Appl. Env. Microbiol. 33, 751.
Martínez, J. A.: 1985, Free-linving amoebas: Natural History, Prevention, Diagnosis, Pathology, and Treatment of Disease, CRC, Florida.
Page, F. C.: 1988, A New Key to Freshwater and Soil Gymnamoebae, Freshwater Biological Association.
Pussard, M.: 1979, Ann. Soc. Beige Med. Trap. 54, 244.
Pussard, M. and Pons, R.: 1977, Protistol 13, 557.
Rivera, F., Garcia, G., Lugo, A., Zierold, E., Islas, J., Ramírez, E., and Bonilla, P.: 1986, Water, Air, and Soil Poll. 28, 185.
Rivera, F., Roy-Ocotla, G., Rosas, I., Ramírez, E., Bonilla, P., and Lares, F.: 1987, Environ. Res. 42, 149.
Rivera, F., Lares, F., Bonilla, P., Ramírez, E., Ramírez, P., and Paulin, A.: 1988, ‘Pathogenic Amoebae Isolated from the Atmosphere of Mexico City and Environs’, in R. Abbou (ed.), Hazardous Waste: Detection, Control, Treatment, Elsevier, Amsterdam, pp. 1175–1179.
Rivera, F., Lares, F., Ramírez, E., Bonilla, P., Calderón, A., Rodríguez, S., Ramírez, J., Xóchihua, L., and Guzmán, H.: 1989, Rev. Latino-amer. Microbiol. 31, 137.
Sawyer, T. K.: 1989, Appl. Environ. Microbiol 55, 1074.
Schofield, T.: 1971, Wat. Pott. Cont. 70, 32.
Singh, B. N. and Das, S. R.: 1972, Curr. Sci. 41, 277.
Sydenham, D. H. J.: 1968, ‘The Ecology of Protozoa and Other Organisms in Activated Sludge’, PhD. thesis, University of London.
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Ramírez, E., Warren, A., Rivera, F. et al. An investigation of the pathogenic and non-pathogenic free-living amoebae in an activated-sludge plant. Water Air Soil Pollut 69, 135–139 (1993). https://doi.org/10.1007/BF00478354
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DOI: https://doi.org/10.1007/BF00478354