Resistance to antibiotics of heavy metal‐tolerant and heavy metal‐sensitive bacterial strains

Wnorowski, Aleksandra U.

doi:10.1080/10934529309375872

Cited by 3 publications

(2 citation statements)

References 29 publications

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“…Novick (1969) and Silver et al (1976) found that bacterial resistance to some metals was determined by extrachromosomal R-factors. R-plasmids contain genes that code for metal tolerance (Ghosh et al 1997;Wnorowski 1992). Ghosh et al (1997) attempted to transfer the plasmid-mediated metal resistance in acidophilic heterotrophic strains of Alcaligenes eutrophus to Escherichia coli; however, the metalresistant genes of A. eutrophus escaped expression in E. coli.…”

Section: Tolerancementioning

confidence: 98%

Essentiality of nickel and homeostatic mechanisms for its regulation in terrestrial organisms

Phipps¹,

Tank²,

Wirtz³

et al. 2002

Environ. Rev.

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Nickel (Ni) is a naturally occurring element with many industrial uses, including in stainless steel, electroplating, pigments, and ceramics. Consequently, Ni may enter the environment from anthropogenic sources, resulting in locally elevated concentrations in soils. However, Ni is a minor essential element, and, therefore, biota have established systems that maintain Ni homeostasis. This paper discusses the role of Ni as an essential element and reviews storage, uptake, and transport systems used to maintain homeostasis within terrestrial biota. The bioaccumulation and distribution of metals in these organisms are also addressed. In all cases, information on Ni essentiality is very limited compared to other essential metals. However, the available data indicate that Ni behaves in a similar manner to other metals. Therefore, inferences specific to Ni may be made from an understanding of metal homeostasis in general. Nevertheless, it is evident that tissue and organ Ni concentrations and requirements vary considerably within and between species, and metal accumulation in various tissues within a single organism differs as well. High rates of Ni deposition around smelters indicate that Ni in acidic soils may reach concentrations that are toxic to plants and soil decomposers. However, with the exception of hyperaccumulator plants, Ni does not biomagnify in the terrestrial food web, suggesting that toxicity to higher trophic levels is unlikely.

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Section: Tolerancementioning

confidence: 98%

Essentiality of nickel and homeostatic mechanisms for its regulation in terrestrial organisms

Phipps¹,

Tank²,

Wirtz³

et al. 2002

Environ. Rev.

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show abstract

“…While antimicrobial agents have confirmed a successful way against bacterial contamination and infection, their widespread use has produced a reservoir of antimicrobial agents and MDR microorganisms. The occurrence and persistence of antimicrobial resistant bacteria in such environments as sediment ( Timoney et al , 1978 ), soil ( Trevors, 1987 ), surface water ( Bell et al , 1980 ; Wnorowski, 1993 ), municipal drinking water ( Armstrong et al , 1981 ; Calomiris et al , 1984 ; Moffie and Mouton, 1988 ) and sewage ( Altherr and Kasweck, 1982 ; Middleton and Ambrose, 2005 ; Murray et al , 1984 ; Walter and Vennes, 1985 ), is a growing public health concern.…”

Section: Introductionmentioning

confidence: 99%

Role of wild birds as carriers of multi-drug resistant Escherichia coli and Escherichia vulneris

Shobrak

Abo‐Amer²

2014

Braz. J. Microbiol.

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Emergence and distribution of multi-drug resistant (MDR) bacteria in environments pose a risk to human and animal health. A total of 82 isolates of Escherichia spp. were recovered from cloacal swabs of migrating and non-migrating wild birds. All bacterial isolates were identified and characterized morphologically and biochemically. 72% and 50% of isolates recovered from non-migrating and migrating birds, respectively, showed positive congo red dye binding (a virulence factor). Also, hemolysin production (a virulence factor) was showed in 8% of isolates recovered from non-migrating birds and 75% of isolates recovered from migrating birds. All isolates recovered from non-migrating birds were found resistant to Oxacillin while all isolates recovered from migrating birds demonstrated resistance to Oxacillin, Chloramphenicol, Oxytetracycline and Lincomycin. Some bacterial isolates recovered from non-migrating birds and migrating birds exhibited MDR phenotype. The MDR isolates were further characterized by API 20E and 16S rRNA as E. coli and E. vulneris. MDR Escherichia isolates contain ~1–5 plasmids of high-molecular weights. Accordingly, wild birds could create a potential threat to human and animal health by transmitting MDR bacteria to water streams and other environmental sources through their faecal residues, and to remote regions by migration.

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Efecto de las aguas residuales hospitalarias sobre los patrones de resistencia a antibióticos de Escherichia coli y Aeromonas sp.

Tzoc¹,

Arias

Valiente³

2004

Rev Biomed

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Introducción. Los centros de atención en salud, especialmente los hospitales, constituyen importantes puntos de origen de descargas de antibióticos hacia el ambiente, produciendo un fuerte impacto en la composición física, química y biológica de los cuerpos receptores. Material y métodos. Con el fin de evaluar el impacto de un efluente hospitalario sobre los patrones de resistencia a antibióticos de poblaciones bacterianas presentes en agua fresca, se recolectaron muestras de agua a partir de una quebrada aledaña a un hospital clase A en San José, Costa Rica, antes del efluente y después de éste. Se aislaron 120 muestras de Escherichia coli y 75 de Aeromonas sp., a las cuales se les evaluó su patrón de susceptibilidad a antibióticos utilizando la técnica de Kirby Bauer. Resultados. La más alta prevalencia de resistencia en E. coli se obtuvo para dos antibióticos relacionados, ampicilina y amoxicilina, con un porcentaje de 57 y 45 respectivamente. Asimismo, es significativo el nivel de resistencia encontrado para tetraciclina. Con respecto a los aislamientos de Aeromonas sp. los mayores porcentajes se obtuvieron para esos mismos antibióticos, muy probablemente debido a una resistencia intrínseca de estas bacterias hacia estos b-lactámicos. Discusión. El efluente hospitalario muestra un importante efecto sobre la presencia de cepas resistentes, aun cuando no es la única fuente de ésta, ya que los patrones de resistencia del cuerpo de agua antes de recibir la descarga hospitalaria muestran ya altos niveles de multirresistencia.

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Resistance to antibiotics of heavy metal‐tolerant and heavy metal‐sensitive bacterial strains

Cited by 3 publications

References 29 publications

Essentiality of nickel and homeostatic mechanisms for its regulation in terrestrial organisms

Essentiality of nickel and homeostatic mechanisms for its regulation in terrestrial organisms

Role of wild birds as carriers of multi-drug resistant Escherichia coli and Escherichia vulneris

Efecto de las aguas residuales hospitalarias sobre los patrones de resistencia a antibióticos de Escherichia coli y Aeromonas sp.

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