Vermamoeba vermiformis in hospital network: a benefit for Aeromonas hydrophila

Delafont, Vincent; Perraud, Estelle; Brunet, Kévin; Maisonneuve, Elodie; Kaaki, Sihem; Rodier, Marie‐Hélène

doi:10.1007/s00436-019-06457-w

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…Note that Cu-Ag Ionization systems can be used in either point of entry or hot water distribution networks. Dermal, Ingestion, Inhalation [107] Moderate [108][109][110][111] Limited [109] Yes [36,112] Aeromonas hydrophila Gastroenteritis, Meningitis, Peritonitis, Pneumonia, Skin infections [113] Ingestion, Inhalation [113] Unknown [114] Unknown Yes [115,116]…”

Section: Figurementioning

confidence: 99%

Critical Review: Propensity of Premise Plumbing Pipe Materials to Enhance or Diminish Growth of Legionella and Other Opportunistic Pathogens

et al. 2020

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Growth of Legionella pneumophila and other opportunistic pathogens (OPs) in drinking water premise plumbing poses an increasing public health concern. Premise plumbing is constructed of a variety of materials, creating complex environments that vary chemically, microbiologically, spatially, and temporally in a manner likely to influence survival and growth of OPs. Here we systematically review the literature to critically examine the varied effects of common metallic (copper, iron) and plastic (PVC, cross-linked polyethylene (PEX)) pipe materials on factors influencing OP growth in drinking water, including nutrient availability, disinfectant levels, and the composition of the broader microbiome. Plastic pipes can leach organic carbon, but demonstrate a lower disinfectant demand and fewer water chemistry interactions. Iron pipes may provide OPs with nutrients directly or indirectly, exhibiting a high disinfectant demand and potential to form scales with high surface areas suitable for biofilm colonization. While copper pipes are known for their antimicrobial properties, evidence of their efficacy for OP control is inconsistent. Under some circumstances, copper’s interactions with premise plumbing water chemistry and resident microbes can encourage growth of OPs. Plumbing design, configuration, and operation can be manipulated to control such interactions and health outcomes. Influences of pipe materials on OP physiology should also be considered, including the possibility of influencing virulence and antibiotic resistance. In conclusion, all known pipe materials have a potential to either stimulate or inhibit OP growth, depending on the circumstances. This review delineates some of these circumstances and informs future research and guidance towards effective deployment of pipe materials for control of OPs.

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Section: Figurementioning

confidence: 99%

Critical Review: Propensity of Premise Plumbing Pipe Materials to Enhance or Diminish Growth of Legionella and Other Opportunistic Pathogens

et al. 2020

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“…Vermamoeba produces cysts (Fouque et al., 2014; Figures 1E,F and 7E) and is globally widespread (Di Filippo et al., 2019). This species is widely distributed in freshwaters (Page, 1967; as Hartmannella vermiformis ), soils (Sousa‐Ramos et al., 2021), coastal marine systems (Chekanov et al., 2019), various hot/warm water systems such as hot springs and municipal or hospital water systems (Berrilli et al., 2021; Delafont et al., 2019; Javanmard et al., 2017) and may be a facultative human pathogen (Scheid, 2019).…”

Section: Resultsmentioning

confidence: 99%

Grazing preferences of three species of amoebae on cyanobacteria and green algae

Weger,

Polasek,

Wright

et al. 2024

J Eukaryotic Microbiology

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Twenty species/isolates of cyanobacteria and green algae were isolated from cyanobacterial bloom samples in lakes associated with the upper Qu'Appelle River drainage system in southern Saskatchewan, Canada. Three amoebae species (Cochliopodium sp., Vannella sp. and Vermamoeba vermiformis) were also isolated from one of these samples, and were subjected to grazing assays to determine which species of cyanobacteria or algae could potentially serve as a food source. Amoeba grazing rates were quantified based on the diameter of the plaque after 12 days on agar plate assays, and by estimation of the amoeba population growth rate from the rate of increase of plaque area. The common cyanobacterial bloom‐formers Dolichospermum sp. and Aphanizomenon flos‐aquae supported high growth rates for all three amoebae, while green algae, with the exception of one green alga/amoeba combination, did not support growth of the tested amoebae. Many of the cyanobacterial and algal isolates that did not support amoebae growth were ingested, suggesting that ingestion did not determine grazing success. Overall, while the cyanobacteria Dolichospermum sp. and Aphanizomenon flos‐aquae were suitable food sources for the amoebae, the other cyanobacteria were grazed in an unpredictable manner, with some species/strains grazed by some amoebae and some species not grazed at all.

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“…vermiformis while in the same media, bacteria without the amoebae were unable to grow. (Delafont et al, 2019). Moreover, V .…”

Section: Vermamoeba Vermiformis As a Trojan Horsementioning

confidence: 99%

“…For example, associations between V . vermiformis and pathogenic bacteria have been reported, such as Legionella pneumophila (Cateau et al, 2014; Delafont et al, 2019; Kuchta et al, 1993; Pagnier et al, 2015). Alarmingly, the presence of V .…”

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confidence: 99%

The increasing importance of Vermamoebavermiformis

Siddiqui

Makhlouf

Khan

2021

J Eukaryotic Microbiology

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Vermamoeba vermiformis are one of the most prevalent free‐living amoebae. These amoebae are ubiquitous and also thermotolerant. Of concern, V. vermiformis have been found in hospital water networks. Furthermore, associations between V. vermiformis and pathogenic bacteria have been reported, such as Legionella pneumophila. Moreover, V. vermiformis are well known to host viruses, bacteria, and other microorganisms and cases of keratitis due to V. vermiformis in conjunction with other amoebae have been reported. Despite the preceding, the medical importance of V. vermiformis is still an ongoing discussion and its genome has been only recently sequenced. Herein, we present a review of the current understanding of the biology and pathogenesis pertaining to V. vermiformis, as well as its’ role as an etiological agent and trojan horse. An approach known as theranostics which combines both diagnosis and therapy could be utilized to eradicate and diagnose keratitis cases caused by such amoebae. Given the rise in global warming, it is imperative to investigate these rarely studied amoebae and to understand their importance in human health.

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Vermamoeba vermiformis in hospital network: a benefit for Aeromonas hydrophila

Cited by 9 publications

References 11 publications

Critical Review: Propensity of Premise Plumbing Pipe Materials to Enhance or Diminish Growth of Legionella and Other Opportunistic Pathogens

Critical Review: Propensity of Premise Plumbing Pipe Materials to Enhance or Diminish Growth of Legionella and Other Opportunistic Pathogens

Grazing preferences of three species of amoebae on cyanobacteria and green algae

The increasing importance of Vermamoebavermiformis

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