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  • Title: [Examination of thermally polluted water for free living amoebae and testing for their possible pathogenic properties].
    Author: Janitschke K, Lichy S, Westphal C.
    Journal: Zentralbl Bakteriol Mikrobiol Hyg B; 1982 May; 176(2-3):160-6. PubMed ID: 7124166.
    Abstract:
    Water and mud samples were collected from canals and rivers which were adjacent to outlets discharging warm water of 3 power plants in Berlin. Downstream samples from 1 bathing resort were also collected. Free living amoebae were isolated from 138 water and 69 mud samples. From these respectively 156 and 73 strains could be cultured and were administered intranasally to mice for pathogenicity tests. Two Acanthamoeba strains from water and 7 from mud could be reisolated from mouse brain and or lungs, although no pathological disorders could be observed. Five Naegleria strains were negative in mouse inoculation tests. Four Acanthamoeba strains which were positive in mice were cultured at + 45 degrees C; no cytopathogenic effects were observed in tissue cultures. Acanthamoeba infective for mice could also be isolated from samples at low water temperatures. Further investigations have to show, whether changes in virulence of amoebic strains are of significance and therefore for epidemiology and pathogenicity in man.
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