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Immunodepression during experimental Naegleria meningoencephalitis in mice

Im KI, Ryu JS, Lee KT

In order to test the function of lymphocytes in Naegleria fowleri-infected mice, the in vitro blastogenic response of splenocyte cultures to non-specific mitogens was studied. Concanavalin A and lipopolysaccharide stimulation...
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Experimental meningoencephalitis by Naegleria fowleri in mice

Ahn MH, Im KI

Experimentally, primary amoebic meningoencephalitis (PAM) is induced by Naegleria fowleri in mouse and development of PAM may be influenced by the strain, weight and sex of mouse, and inoculum size...
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Protective immunity against Naegleria meningoencephalitis in mice

Lee SG, Im KI, Lee KT

This study is to verify the protective ability against experimental Naegleria meningoencephalitis by immunization with Naegleria fowleri in mice. Naegleria fowleri, strain 0359, and Naegleria gruberi, strain EGB, were used...
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Parasitic amebae in Korea

Soh CT

This review dealt with biology, host-parasite relationship, symptomatology, epidemiology, diagnosis, treatment of Entamoeba histolytica infection and free livng amoeba.
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Immunological tests by anti-free-living amoebas serum produced in experimental animals II. Indirect fluorescent antibody titer of anti-free-living amoebas serum produced in rabbits

Im KI, Soh CT

The indirect fluorescent antibody test was performed to demonstrate the antibody production in the rabbits immunized with free-living amoebas; Acanthamoeba culbertsoni and Naegleria fowleri, and antibody titer changes by immunization...
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Immunological tests by anti-free-living amoebas serum produced in experimental animals I. Immobilization of free-living amoebas in vitro by rabbit antiserum

Im KI, Oh HS

Rabbits were immunized with free-living amoebas by intravenous injections. The amoebas were Acanthamoeba culbertsoni and Naegleria fowleri and obtained by axenic cultivation in CGVS medium. Each rabbit received 10(6) of...
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Pathogenic free-living amoebae

Im KI

Studies on pathogenic free-living amoebae performed in Korea were briefly reviewed. One strain of Naegleria fowleri was isolated from the sewage, and 3 strains of Acanthamoeba culbertsoni from a reservoir...
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Failure of immunization with Naegleria fowleri in mice born to immune mothers

Im KI, Lee KT

Female BALB/c mice weighing 18-20 g were immunized by three injections of 1 x 10(6) Naegleria fowleri trophozoites intraperitoneally at the interval of one week 6 times for the pregnant...
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The nfa1 Gene Contributed on the Contact-dependent Pathogenic Mechanisms of Naegleria fowleri

Shin HJ

Free-living Naegleria fowleri is a causal agent of primary amoebic meningoencephalitis in mainly children and young adults. An nfa1 gene, encoding 360 bp of nucleotides, was cloned from a N....
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Ultrastructural observation of Naegleria fowleri trophozoite in mouse brain and axenic culture

Ryu JS, Soh CT, Im KI

Present study was undertaken to elucidate the changes of the ultrastructure of Naegleria fowleri trophozoite in brain tissue of mice and culture medium. Naegleria fowleri, 0359 strain, which used in...
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Natural killer cell activity in Naegleria fowleri infected mice

Lee KR, Shin CO, Im K

The natural killer (NK) cell activity of splenocytes and recycling capacity of NK cells were observed by combining the 51Cr-release cytotoxicity assay and single cell cytotoxicity assay against YAC-1. The...
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Contact-Independent Cell Death of Human Microglial Cells due to Pathogenic Naegleria fowleri Trophozoites

Kim JH, Kim D, Shin HJ

Free-living Naegleria fowleri leads to a fatal infection known as primary amebic meningoencephalitis in humans. Previously, the target cell death could be induced by phagocytic activity of N. fowleri as...
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The production and characterization of anti-Naegleria fowleri monoclonal antibodies

Ryu JS, Im KI

Naegleria fowleri, a free-living amoeba commonly found in moist soil and fresh water, enters the body via the nasal mucosa and migrates along the olfactory nerve to the brain, where...
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A Fatal Case of Naegleria fowleri Meningoencephalitis in Taiwan

Su MY, Lee MS, Shyu LY, Lin WC, Hsiao PC, Wang CP, Ji DD, Chen KM, Lai SC

After bathing at a hot spring resort, a 75-year-old man presented to the emergency department because of seizure-like attack with loss of conscious. This is the first case of primary...
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Immunization effect on Naegleria fowleri infection in splenectomized mice

Han KH, Ahn MH, Min DY

A pathogenic free-living amoeba, Naegleria fowleri, is a causative protozoan parasite of primary amebic meningoencephalitis in human and experimental animals. It is known that humoral and cellular immunity contribute as...
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Studies on the cell-mediated immunity in experimental Naegleria spp. infections

Lee SG, Shin HJ, Im KI

Observations were made on the differences in cell-mediated immune responses in the mice infected with strongly pathogenic Naegleria fowleri ITMAP 359, weakly pathogenic Naegleria jadini 0400, or non-pathogenic Naegleria gruberi...
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Naegleria fowleri Lysate Induces Strong Cytopathic Effects and Pro-inflammatory Cytokine Release in Rat Microglial Cells

Lee YJ, Park CE, Kim JH, Sohn HJ, Lee J, Jung SY, Shin HJ

Naegleria fowleri, a ubiquitous free-living ameba, causes fatal primary amebic meningoencephalitis in humans. N. fowleri trophozoites are known to induce cytopathic changes upon contact with microglial cells, including necrotic and...
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Interleukin-2 production and alteration of T cell subsets in mice infected with Naegleria fowleri

Lyu CJ, Shin CO, Im K

Naegleria fowleri is the cause of primary amoebic meningoencephalitis in man. IL-2 levels after stimulation of T lymphocytes by PHA or N. fowleri lysates, the amounts of T lymphocyte...
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Decreasing effect of an anti-Nfa1 polyclonal antibody on the in vitro cytotoxicity of pathogenic Naegleria fowleri

Jeong SR, Kang SY, Lee SC, Song KJ, Im KI, Shin HJ

The nfa1 gene was cloned from a cDNA library of pathogenic Naegleria fowleri by immunoscreening; it consisted of 360 bp and produced a 13.1 kDa recombinant protein (rNfa1) that showed...
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Primary Amebic Meningoencephalitis: A Case Report

Chen M, Ruan W, Zhang L, Hu B, Yang X

Primary amebic encephalitis (PAM) is a devastating central nervous system infection caused by Naegleria fowleri, a free-living amoeba, which can survive in soil and warm fresh water. Here, a 43-year-old...
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