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Keywords:

  • Naegleria fowleri;
  • immunized mice;
  • protection;
  • histology;
  • nasal mucosa;
  • inflammation;
  • polymorphs;
  • epithelium shedding

Summary An experiment was performed which confirmed a previous finding that mice are protected against Naegleria fowleri infection by immunization with amoeba-free supernatant from amoeba cultures. Histological observations suggested that this protection is expressed mainly at the nasal mucosa and possibly results from the combined effects of polymorphonuclear leucocyte-mediated killing of the amoeba and mechanical elimination of the organisms by extensive shedding of necrotic epithelium.