Free-living amoebae: what part do they play in healthcare-associated infections?

Cateau, Estelle; Delafont, Vincent; Héchard, Yann; Rodier, Marie‐Hélène

doi:10.1016/j.jhin.2014.05.001

Cited by 71 publications

(59 citation statements)

References 116 publications

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“…Thus, co-culture should be used to discover new pathogenic bacterial species, due to amoeba's major role on the composition of microbiota. (Saeed et al, 2009; Acinetobacter baumannii, Bosea sp., Campylobacter jejuni, C. coli, Coxiella burnetii, Francisella tularensis, Kocuria kristinae, Roseomonas gilardii Reservoir (Baron et al, 1980;Hackstadt and Williams, 1983;Snelling et al, 2006;Thomas et al, 2010;Saeed et al, 2012;Cateau et al, 2014) Yersinia enterocolitica Increased disinfection resistance when internalized (Snelling et al, 2006) A. culbertsoni Acinetobacter baumannii, Mobiluncus curtisii Reservoir (Thomas et al, 2010;Cateau et al, 2014) A. polyphaga Mycobacterium abscessus, M. avium subsp. avium, M. aurum, M. bohemicum, M. chelonae, M. fortuitum, M. gastri, M. goodii, M. gordonae, M. immunogenum, M. intracellulare, M. kansasii, M. lentiflavum, M. mageritense, M. malmoense, M. marinum, M. massiliense, M. mucogenicum, M. peregrinum, M. porcinum, M. septicum, M. simiae, M. smegmatis, M. szulgai, M. terrae, M. tusciae, Shigella dysenteriae, S. flexneri, S. sonnei Reservoir (transmission reservoir) (Adekambi et al, 2006;Saeed et al, 2009; (Snelling et al, 2006;Thomas et al, 2010) A. rhysodes Salmonella spp.…”

Section: Discussionmentioning

confidence: 99%

“…Barker and Brown, 1994;Vaerewijck et al, 2008;Thomas and Greub, 2010) that one such way is FLA acting as vehicles and fill with living bacteria, in a process called "Trojan horses". Another way is that bacteria are able to resist FLA digestion and live in trophozoites or cysts Cateau et al, 2014). Furthermore, it is possible that interactions could occur when bacteria manipulate host gene expression of housekeeping genes and enable themselves to proliferate in amoeba cells.…”

Section: Interaction Between Fla and Bacteriamentioning

confidence: 99%

“…FLA are used by bacteria as transmission reservoirs, mediators, vectors or vehicles (Table 2) (Siddiqui and Khan, 2012b;Cateau et al, 2014;Vezzulli et al, 2014). Declerck et al (2009) confirmed that in anthropogenic aquatic systems, A. castellanii play a decisive role in the increase and spread of L. pneumophila.…”

Section: Interaction Between Fla and Bacteriamentioning

confidence: 99%

“…They are mobile and feed on various microorganisms, such as fungi, protozoa, bacteria, and organic particles (Cateau et al, 2014). Many wellknown pathogens of humans are able to infect, survive, and multiply within phagocytosis vacuoles Horn and Wagner, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Relationships between Free-Living Amoeba and their Intracellular Bacteria

Rubeniņa

Kirjušina

Bērziņš

et al. 2017

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

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An increasing number of bacteria have been described as benefiting from interaction with free-living amoeba. The most common association between free-living amoeba and microorganisms is interaction of various non-pathogenic and pathogenic bacterial species with amoeba. Various pathogenic bacterial species have capacity to resist digestion by free-living amoeba, which has been observed by many researchers. Also, several of these pathogens are able to resist digestion by macrophages. In addition, free-living amoeba have been associated with several diseases in humans. Acanthamniioeba castella is an important predator of bacteria. It is a ubiquitous organism in water, soil, and air. Attention from a public health perspective is needed by investigation of interaction of foodborne pathogens and free-living amoeba. Bacteria can use free-living amoeba as reservoirs, mediators or vehicles, an infection route, “biological gym” and evolutionary crib or interaction may result in a close endosymbiotic relationship. The purpose of this review is to describe the interaction mechanisms between free-living amoeba and common bacteria species that survive in host cells.

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Section: Discussionmentioning

confidence: 99%

Section: Interaction Between Fla and Bacteriamentioning

confidence: 99%

Section: Interaction Between Fla and Bacteriamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Relationships between Free-Living Amoeba and their Intracellular Bacteria

Rubeniņa

Kirjušina

Bērziņš

et al. 2017

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

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“…The importance of this association is still being elucidated. 11 In addition to adjacent soil, one source of freshwater fungi is atmospheric dust (dispersed by wind, excavation and other soil-disturbing activities). One would expect regional variations in species diversity, as documented for dust-associated fungi by external surface cultures.…”

Section: Freshwater Microbiologymentioning

confidence: 99%

Freshwater Fungal Infections

Baumgardner

2017

Journal of Patient-Centered Research and Reviews

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The food web perspective on aquatic biofilms

Weitere

Erken

Majdi

et al. 2018

Ecological Monographs

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Biofilms, the complex communities of microbiota that live in association with aquatic interfaces, are considered to be hotspots of microbial life in many aquatic ecosystems. Although the importance of attached algae and bacteria is widely recognized, the role of the highly abundant biofilm‐dwelling micrograzers (i.e., heterotrophic protists and small metazoans) is poorly understood. Studies often highlight the resistance of bacterial biofilms to grazing within the microbial food web and therefore argue that the micrograzers have a modulating role (i.e., have effects on biofilm phenotype) rather than a direct trophic role within biofilms. In the present review, we show that this view comes too short, and we establish a conceptual framework of biofilm food webs consisting of three major elements. (1) Energy pathways and subsidization from plankton. As inhabitants of interfaces, biofilm‐dwelling grazers potentially access both planktonic organisms and surface‐associated organisms. They can play an important role in importing planktonic production into the biofilm food web and thus in the coupling of the planktonic and benthic food webs. Nevertheless, specialized grazers are also able to utilize significant amounts of autochthonous biofilm production. (2) Horizontal complexity of the basal food web. While bacteria and algae within biofilms are edible in general, food quality and accessibility of both bacteria and algae can differ considerably between different prey phenotypes occurring during biofilm formation with respect to morphology, chemical defense, and nutrient stoichiometry. Instead of considering bacteria and algae within biofilms to be generally resistant to feeding by micrograzers, we suggest considering a horizontal food‐quality axis to be at the base of biofilm food webs. This food quality gradient is probably associated with increasing costs for the micrograzers. (3) Vertical food web complexity and food chain length. In addition to the consumption of bacteria and algae, many predatory micrograzers exist within biofilm food webs. With the help of video microscopy, we were able to demonstrate the existence of a complex food web with several trophic levels within biofilms. Our conceptual framework should assist in integrating food web concepts and processes into whole‐biofilm budgets and in understanding food‐web‐related interactions within biofilms.

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Free-living amoebae: what part do they play in healthcare-associated infections?

Cited by 71 publications

References 116 publications

Relationships between Free-Living Amoeba and their Intracellular Bacteria

Relationships between Free-Living Amoeba and their Intracellular Bacteria

Freshwater Fungal Infections

The food web perspective on aquatic biofilms

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