Uptake and Replication of<i>Salmonella enterica</i>in<i>Acanthamoeba rhysodes</i>

Tezcan-Merdol, Dilek; Ljungström, Marianne; Winiecka-Krusnell, Jadwiga; Linder, Ewert; Engstrand, Lars; Rhen, Mikael

doi:10.1128/aem.70.6.3706-3714.2004

Cited by 85 publications

(81 citation statements)

References 48 publications

(36 reference statements)

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“…57 IntraAcanthamoeba detection, survival, growth, and multiplication of salmonellae 56 and P. aeruginosa 58,59 were reported, with the possibility of reisolating 58 P. aeruginosa from Acanthamoeba cysts. P. aeruginosa could significantly enhance Acanthamoeba trophozoite attachment to hydrogel contact lenses, 60 but not to silicone ones.…”

Section: Mechanical Ways Used In Contact Lensmentioning

confidence: 99%

How Could Contact Lens Wearers Be at Risk of Acanthamoeba Infection? A Review

Ibrahim

Boase

Cree

2009

Journal of Optometry

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Contact lens wear is highly influential on the incidence of ulcerative keratitis worldwide, particularly in developed countries. The association between Acanthamoeba keratitis and contact lens wear is firmly established; it may account for up to 95% of the reported cases. Before the popularisation of soft contact lens wear, Acanthamoeba keratitis was extremely rare. In 2000 it was estimated that the number of contact lens wearers worldwide was about 80 million, out of whom 33 million were in the United States and 90% of them wore hydrogel soft lenses. Contact lens-related problems depend on many factors, such as lens material, wearing modality, lens hygiene, type of lens-caring solution, the degree of compliance of the lens user with lens wear and care procedures, lens overwear, sleeping in lenses, rate of changing lenses, and lens case hygiene. This paper is a thorough review of the literature aiming to highlight the role of one of the main risk factors of infectious keratitis, contact lens wear, and also to show the responsibility of lens users in aggravating this risk. RESUMENLa utilización de lentes de contacto es un factor que influye sumamente en la incidencia de la queratitis ulcerosa, en particular en los países desarrollados. La asociación entre queratitis por Acanthamoeba y el uso de lentes de contacto está firmemente establecida; podría representar aproximadamente hasta un 95% de los casos registrados. Antes de la popularización del uso de lentes de contacto, la queratitis por Acanthamoeba era muy poco frecuente. En el año 2000 se estimó que, a nivel mundial, había unos 80 millones de usuarios de lentes de contacto, de los cuales 33 millones residían en los Estados Unidos y, de ellos, el 90% utilizaban lentes de contacto blandas de hidrogel. Los problemas derivados del uso de lentes de contacto dependen de otros muchos factores, como el material del que está hecha la lente, la modalidad de uso, las medidas de higiene empleadas, el tipo de solución utilizada para la limpieza y el mantenimiento de la lente, el grado de cumplimiento terapéutico del usuario de las lentes respecto a su utilización y a su limpieza/mantenimiento, el uso de las lentes durante periodos excesivamente prolongados, el dormir con las lentes de contacto puestas, la frecuencia con la que el usuario se cambia de lentes y la limpieza de la funda de las lentes de contacto. Este artículo presenta una revisión minuciosa de la literatura, con el objetivo de resaltar el papel de uno de los principales factores de riesgo de desarrollo de queratitis infeccionsa, como es el uso de lentes de contacto, y con el fin de poner de relieve que el propio usuario de las lentes es, en ocasiones, el responsable de agravar este riesgo. (J Optom 2009;2:60-66 ©2009 Consejo General de Colegios de Ópticos-Optometristas de España) PALABRAS CLAVE: Acanthamoeba; queratitis; lentes de contacto; usuario de lentes de contacto; uso excesivo de las lentes de contacto.

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Section: Mechanical Ways Used In Contact Lensmentioning

confidence: 99%

How Could Contact Lens Wearers Be at Risk of Acanthamoeba Infection? A Review

Ibrahim

Boase

Cree

2009

Journal of Optometry

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“…These include various foodborne pathogens such as Campylobacter jejuni (Axelsson-Olsson et al, 2005;Baré et al, 2010), Escherichia coli O157:H7 (Barker et al, 1999), Listeria monocytogenes (Zhou et al, 2007), Salmonella spp. (Gaze et al, 2003;Tezcan-Merdol et al, 2004), Staphylococcus aureus (Huws et al, 2008), Arcobacter butzleri (Medina et al, 2014) and Yersinia enterocolitica (Lambrecht et al, 2013). However intraprotozoan survival and/or replication depend on various factors such as bacterial strain and environmental conditions (Schuppler, 2014;Vaerewijck et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Co-occurrence of free-living protozoa and foodborne pathogens on dishcloths: Implications for food safety

Chavatte

Baré

Lambrecht

et al. 2014

International Journal of Food Microbiology

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In the present study, the occurrence of free-living protozoa (FLP) and foodborne bacterial pathogens on dishcloths was investigated. Dishcloths form a potentially important source of cross-contamination with FLP and foodborne pathogens in food-related environments. First various protocols for recovering and quantifying FLP from dishcloths were assessed. The stomacher technique is recommended to recover flagellates and amoebae from dishcloths. Ciliates, however, were more efficiently recovered using centrifugation. For enumeration of freeliving protozoa on dishcloths, the Most Probable Number method is a convenient method. Enrichment was used to assess FLP diversity on dishcloths (n = 38). FLP were found on 89% of the examined dishcloths; 100% of these tested positive for amoebae, 71% for flagellates and 47% for ciliates. Diversity was dominated by amoebae: vahlkampfiids, vannellids, Acanthamoeba spp., Hyperamoeba sp. and Vermamoeba vermiformis were most common. The ciliate genus Colpoda was especially abundant on dishcloths while heterotrophic nanoflagellates mainly belonged to the genus Bodo, the glissomonads and cercomonads. The total number of FLP in used dishcloths ranged from 10 to 10 4 MPN/cm 2 . Flagellates were the most abundant group, and ciliates the least abundant. Detergent use was identified as a prime determinant of FLP concentrations on used dishcloths. Bacterial load on dishcloths was high, with a mean total of aerobic bacteria of 7.47 log 10 cfu/cm 2 . Escherichia coli was detected in 68% (26/38) of the used dishcloths, with concentrations up to 4 log 10 cfu/cm 2 . Foodborne pathogens including Staphylococcus aureus (19/38), Arcobacter butzleri (5/38) and Salmonella enterica subsp. enterica ser. Halle (1/38) were also present. This study showed for the first time that FLP, including some opportunistic pathogens, are a common and diverse group on dishcloths. Moreover, important foodborne pathogens are also regularly recovered. This simultaneous occurrence makes dishcloths a potential risk factor for cross-contamination and a microbial niche for bacteria-FLP interactions.

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“…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. Mediator (Vaerewijck et al, 2014) Salmonella enterica Reservoir (Tezcan-Merdol et al, 2004) Acanthamoeba spp.…”

Section: Discussionmentioning

confidence: 99%

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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Uptake and Replication ofSalmonella entericainAcanthamoeba rhysodes

Cited by 85 publications

References 48 publications

How Could Contact Lens Wearers Be at Risk of Acanthamoeba Infection? A Review

How Could Contact Lens Wearers Be at Risk of Acanthamoeba Infection? A Review

Co-occurrence of free-living protozoa and foodborne pathogens on dishcloths: Implications for food safety

Relationships between Free-Living Amoeba and their Intracellular Bacteria

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