Radio-resistance in psychrotrophic Kocuria sp. ASB 107 isolated from Ab-e-Siah radioactive spring

Asgarani, Ezat; Soudi, Mohammad Reza; Borzooee, Faezeh; Dabbagh, Reza

doi:10.1016/j.jenvrad.2012.04.009

Cited by 25 publications

(16 citation statements)

References 33 publications

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“…Streptomyces are widely known for their high stress tolerance and resistance to antibiotics [31],[85], as well as for the ability to produce antibiotics themselves [86]. Bacterial strains of the genera Kocuria , Planomicrobium , Sphingomonas were previously isolated from a variety of extreme habitats and their resistance to the presence of heavy metals, salts [87]–[89] and to ionizing radiation [28],[90]–[92] was shown. For Leucobacter high resistance to chromium and moderate halotolerence was proved [93].…”

Section: Discussionmentioning

confidence: 99%

Soil bacterial communities of Sahara and Gibson deserts: Physiological and taxonomical characteristics

Belov¹,

Cheptsov²,

Vorobyova

2018

AIMS Microbiology

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The purpose of this research was to investigate the structure of soil bacteria communities present in the Gibson (Australia) and the Sahara (Egypt) deserts, as well as to estimate strain survivability under different environmental factors. It should be noticed that the screening of bacterial resistance to wide spectra of principally different stress conditions was performed for the first time. Experiments were conducted with culturable bacterial communities. Strains were identified using 16S rRNA sequencing, and stress-tolerance was estimated by growing strains in various nutrient media. In order to characterize the community the epifluorescent microscopy and multisubstrate testing were also performed. High bacterial abundance in the desert soils was detected, and there was seen a significant proportion of culturable cells. The close numbers of psychotropic and mesophilic bacteria in arid ecosystems were revealed. The representatives of the Actinobacteria phylum were dominant in the microbial communities, and Firmicutes , Proteobacteria , and Bacteroidetes phyla representatives were also identified. Tolerance of the axenic bacterial cultures, isolated from arid desert ecotopes, to temperature, pH, salts (KCl, NaCl, MgSO 4 , NaHCO 3 ), strong oxidizers (Mg(ClO 4 ) 2 ), and antibiotics (ampicillin, cephalexin, chloramphenicol, tetracycline, doxycycline, kanamycin, rifampicin) was studied. The bacterial isolates were characterized by polyextremotolerance and by the ability to maintain metabolic activity in vitro while influenced by a wide range of physicochemical and biotic factors.

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Section: Discussionmentioning

confidence: 99%

Soil bacterial communities of Sahara and Gibson deserts: Physiological and taxonomical characteristics

Belov¹,

Cheptsov²,

Vorobyova

2018

AIMS Microbiology

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“…Kocuria spp. ASB107, closely related to K. polaris and K. rosea , which was isolated from Iranian Ab-e-Siah hot springs, showed resistance to gamma and ultra violet (UV) rays with a temperature growth range of 0 to 37 °C [ 39 ]. Another isolate of K. rosea MG2 from the same Iranian hot spring optimally grew at pH 9.…”

Section: Discussionmentioning

confidence: 99%

“…It appears that these non-spore-forming bacteria are also able to withstand harsh environmental conditions such as extreme temperature, pH, salinity and radioactivity. It has been reported that the following bacteria thrive under extreme conditions: Ralstonia [ 37 ], Legionella [ 38 ], Kocuria [ 39 , 40 ], Tepidimonas [ 41 ] and Cronobacter [ 42 ]. Except for Legionella and Pseudomonas , there have been no reports associated with infections by the abovementioned bacteria from hot springs.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic Analysis and Antimicrobial Profiles of Cultured Emerging Opportunistic Pathogens (Phyla Actinobacteria and Proteobacteria) Identified in Hot Springs

Jardine

Abia

Mavumengwana

et al. 2017

IJERPH

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Hot spring water may harbour emerging waterborne opportunistic pathogens that can cause infections in humans. We have investigated the diversity and antimicrobial resistance of culturable emerging and opportunistic bacterial pathogens, in water and sediment of hot springs located in Limpopo, South Africa. Aerobic bacteria were cultured and identified using 16S ribosomal DNA (rDNA) gene sequencing. The presence of Legionella spp. was investigated using real-time polymerase chain reaction. Isolates were tested for resistance to ten antibiotics representing six different classes: β-lactam (carbenicillin), aminoglycosides (gentamycin, kanamycin, streptomycin), tetracycline, amphenicols (chloramphenicol, ceftriaxone), sulphonamides (co-trimoxazole) and quinolones (nalidixic acid, norfloxacin). Gram-positive Kocuria sp. and Arthrobacter sp. and gram-negative Cupriavidus sp., Ralstonia sp., Cronobacter sp., Tepidimonas sp., Hafnia sp. and Sphingomonas sp. were isolated, all recognised as emerging food-borne pathogens. Legionella spp. was not detected throughout the study. Isolates of Kocuria, Arthrobacter and Hafnia and an unknown species of the class Gammaproteobacteria were resistant to two antibiotics in different combinations of carbenicillin, ceftriaxone, nalidixic acid and chloramphenicol. Cronobacter sp. was sensitive to all ten antibiotics. This study suggests that hot springs are potential reservoirs for emerging opportunistic pathogens, including multiple antibiotic resistant strains, and highlights the presence of unknown populations of emerging and potential waterborne opportunistic pathogens in the environment.

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“…and Kocuria spp. have been isolated from polar environments and reported to be resistant to radiation [41][42][43][44], whereas Arthrobacter spp. are present in hot deserts [2,[45][46].…”

Section: Discussionmentioning

confidence: 99%

Microbial communities on UV cabins in the dermatology service of a Spanish hospital: ecology and resistance to UV light and antibiotics

Molina‐Menor

Carlotto

Vidal‐Verdú

et al. 2023

Preprint

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Microorganisms colonize all possible ecological habitats, including those subjected to harsh stressors such as UV radiation. Hospitals, in particular the UV cabins used in phototherapy units, constitute an environment in which microbes are intermittently subjected to UV irradiation. This selective pressure, in addition to the frequent use of antibiotics by patients, may represent a threat in the context of the increasing problem of antimicrobial resistance. In this work, a collection of microorganisms has been established in order to study the microbiota associated to the inner and outer surfaces of UV cabins and to assess their resistance to UV light and the antibiotics frequently used in the Dermatology Service of a Spanish hospital. Our results show that UV cabins harbor a relatively diverse biocenosis dominated by typically UV-resistant microorganisms commonly found in sun-irradiated environments, such as Kocuria, Micrococcusor Deinococcus spp., but also clinically relevant taxa, such as Staphylococcusor Pseudomonas spp. The UV-radiation assays revealed that, although some isolates displayed some resistance, UV is not a major factor shaping the biocenosis living on the cabins, since a similar pool of resistant microorganisms was identified on the external surface of the cabins. Interestingly, some Staphylococcus spp. displayed resistance to one or more antibiotics, although the hospital reported no cases of antibiotic-resistance infections of the patients using the cabins. Finally, no association between UV and antibiotic resistances was found.

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Radio-resistance in psychrotrophic Kocuria sp. ASB 107 isolated from Ab-e-Siah radioactive spring

Cited by 25 publications

References 33 publications

Soil bacterial communities of Sahara and Gibson deserts: Physiological and taxonomical characteristics

Soil bacterial communities of Sahara and Gibson deserts: Physiological and taxonomical characteristics

Phylogenetic Analysis and Antimicrobial Profiles of Cultured Emerging Opportunistic Pathogens (Phyla Actinobacteria and Proteobacteria) Identified in Hot Springs

Microbial communities on UV cabins in the dermatology service of a Spanish hospital: ecology and resistance to UV light and antibiotics

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