Permissiveness of freshly isolated environmental strains of amoebae for growth of Legionella pneumophila

FEMS Microbiology Letters
Mathieu DupuyYann Héchard

Abstract

Legionella pneumophila is a pathogenic bacterium commonly found in water and responsible for severe pneumonia. Free-living amoebae are protozoa also found in water, which feed on bacteria by phagocytosis. Under favorable conditions, some L. pneumophila are able to resist phagocytic digestion and even multiply within amoebae. However, it is not clear whether L. pneumophila could infect at a same rate a large range of amoebae or if there is some selectivity towards specific amoebal genera or strains. Also, most studies have been performed using collection strains and not with freshly isolated strains. In our study, we assess the permissiveness of freshly isolated environmental strains of amoebae, belonging to three common genera (i.e. Acanthamoeba, Naegleria and Vermamoeba), for growth of L. pneumophila at three different temperatures. Our results indicated that all the tested strains of amoebae were permissive to L. pneumophila Lens and that there was no significant difference between the strains. Intracellular proliferation was more efficient at a temperature of 40°C. In conclusion, our work suggests that, under favorable conditions, virulent strains of L. pneumophila could equally infect a large number of isolates of common fr...Continue Reading

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Citations

Nov 7, 2016·Environmental Science and Pollution Research International·Jingrang LuNicholas Ashbolt
Dec 19, 2017·Frontiers in Cellular and Infection Microbiology·David K BoamahTamara J O'Connor
Feb 15, 2018·The Journal of Eukaryotic Microbiology·Fatma GomaaColleen M Cavanaugh

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