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Geographical and seasonal distribution of multiple antibiotic resistance of heterotrophic bacteria of Lake Shira / T. I. Lobova [et al.] // Aquatic Ecology. - 2002. - Vol. 36, Is. 2. - P299-307, DOI 10.1023/A:1015618820450 . - ISSN 1386-2588
Кл.слова (ненормированные):
Ampicillin -- Brackish lake -- Halotolerance -- Heterotrophic bacteria -- Horizontal gene transfer -- Kanamycin -- Multiple antibiotic resistance -- antibiotics -- bacterium -- drug resistance -- geographical distribution -- saline lake -- salinity tolerance -- seasonal variation -- Russian Federation -- Bacteria (microorganisms)
Аннотация: From 1996 to 1999 heterotrophic bacteria of the brackish-water Lake Shira (Republic of Khakasia, Russia) were studied to understand the seasonal dynamics of their antibiotic resistance. During the winter, these bacteria were represented primarily by forms that could not be cultured and were psychrotolerant. In the summer period, heterotrophic, mesophilic bacteria increased in number. The percentages of isolates with multiple, antibiotic resistance isolated from the lake region near the resort area of the lake were 2-3 times higher than those from the central part of the lake. A decline in the bacterial numbers with multiple antibiotic resistance was observed during the cold period (February-March). Various mechanisms of multiple, antibiotic resistance of heterotrophic bacteria isolated from Shira lake are discussed.

Scopus
Держатели документа:
Institute of Biophysics of SB RAS, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Lobova, T.I.; Maksimova, E.Ye.; Popova, L.Yu.; Pechurkin, N.S.

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Population heterogeneity of plasmid-bearing and plasmid-free Bacillus subtilis strains under different environmental conditions / T. Yu. Krylova [et al.] // Microbiology. - 2000. - Vol. 69, Is. 2. - P220-224 . - ISSN 0026-2617
Кл.слова (ненормированные):
Bacillus subtilis -- Heterogeneity -- Introduction -- Microcosm -- Recombinant plasmid
Аннотация: The population heterogeneity of recombinant and plasmid-free Bacillus subtilis strains introduced into aquatic microcosms was studied. After introduction, the population of the plasmid-free strain B. subtilis 2335 in microcosms has long been represented by both vegetative cells and spores, whereas, already ten days after introduction, the population of the recombinant strain B. subtilis 2335/105 (KmI)Inf+) was represented only by spores. The number of plasmid copies in the spore isolates of the recombinant strain was the same as before introduction, but the plasmid abundance in the vegetative isolates of this strain decreased. The isolates of B. subtilis 2335/105 obtained from microcosms and the variants of this strain obtained by ten successive subcultures on M9 and 0.1?M9 media with and without kanamycin (Km) differed in the number of plasmid copies, Km resistance, and maximum biomass yield during batch cultivation. Irrespective of the presence of Km, more than 50% of the variants subcultured on M9 medium showed reduced plasmid abundance. At the same time, about 70% of the variants subcultured on 0.1 ? M9 medium with Km and 90% of the variants subcultured on the same medium without Km retained the initial number of plasmid copies. The variants subcultured on media with Km retained the initial biomass level. In more than 70% of the variants isolated from media without Km, the biomass yield increased. В© 2000 MAIK "Nauka/Interperiodica".

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Krylova, T.Yu.; Popova, L.Yu.; Pechurkin, N.S.; Kashperova, T.A.; Belyavskaya, V.A.

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Population heterogeneity of plasmid-bearing and plasmid-free bacillus subtilis strains under different environmental conditions / T. Yu. Krylova [и др.] // Mikrobiologiya. - 2000. - Vol. 69, Is. 2. - С. 270-275 . - ISSN 0026-3656
Кл.слова (ненормированные):
Bacillus subtilis -- Heterogeneity -- Introduction -- Microcosm -- Recombinant plasmid -- article -- Bacillus subtilis -- culture medium -- genetic recombination -- genetics -- plasmid -- Bacillus subtilis -- Culture Media -- Plasmids -- Recombination, Genetic
Аннотация: The population heterogeneity of recombinant and plasmid-free Bacillus subtilis strains introduced into aquatic microcosms was studied. After introduction, the population of the plasmid-free strain B. subtilis 2335 in microcosms has long been represented by both vegetative cells and spores, whereas, already ten days after introduction, the population of the recombinant strain B. subtilis 2335/105 (Km rInf +) was represented only by spores. The number of plasmid copies in the spore isolates of the recombinant strain was the same as before introduction, but the plasmid abundance in the vegetative isolates of this strain decreased. The isolates of B. subtilis 2335/105 obtained from microcosms and the variants of this strain obtained by ten successive subcultures on M9 and 0.1 ? M9 media with and without kanamycin (Km) differed in the number of plasmid copies, Km resistance, and maximum biomass yield during batch cultivation. Irrespective of the presence of Km, more than 50% of the variants subcultured on M9 medium showed reduced plasmid abundance. At the same time, about 70% of the variants subcultured on 0.1 ? M9 medium with Km and 90% of the variants subcultured on the same medium without Km retained the initial number of plasmid copies. The variants subcultured on media with Km retained the initial biomass level. In more than 70% of the variants isolated from media without Km, the biomass yield increased.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Krylova, T.Yu.; Popova, L.Yu.; Pechurkin, N.S.; Kashperova, T.A.; Belyavskaya, V.A.

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Multiple antibiotic resistance of heterotrophic bacteria in the littoral zone of Lake Shira as an indicator of human impact on the ecosystem / T. I. Lobova [et al.] // Microbiological Research. - 2008. - Vol. 163, Is. 2. - P152-160, DOI 10.1016/j.micres.2006.03.014 . - ISSN 0944-5013
Кл.слова (ненормированные):
Antibiotic resistance -- Aquatic ecosystems -- Heterotrophic bacteria -- Human impact -- Monitoring -- Antibiotics -- Bacteria -- Ecosystems -- Environmental impact -- Mammals -- Antibiotic resistance -- Aquatic ecosystems -- Heterotrophic bacteria -- Materials -- antiinfective agent -- fresh water -- allochthony -- anthropogenic effect -- antibiotic resistance -- bacterium -- concentration (composition) -- heterotrophy -- intertidal environment -- monitoring -- recreational facility -- spring (season) -- summer -- animal -- article -- bacterial count -- bacterium -- drug effect -- ecosystem -- environmental monitoring -- heterotrophy -- human -- isolation and purification -- methodology -- microbiological examination -- microbiology -- multidrug resistance -- Russian Federation -- season -- Animals -- Anti-Bacterial Agents -- Bacteria -- Colony Count, Microbial -- Drug Resistance, Multiple, Bacterial -- Ecosystem -- Environmental Monitoring -- Fresh Water -- Heterotrophic Processes -- Humans -- Microbial Sensitivity Tests -- Russia -- Seasons -- Eurasia -- Khakassia -- Lake Shira -- Russian Federation -- Animalia -- Bacteria (microorganisms)
Аннотация: Resistance to Ampicillin and Kanamycin displayed by heterotrophic bacteria isolated in Summer and in Spring from the littoral and the central parts of Lake Shira (a therapeutic lake in the Khakasia Republic, Russia) has been investigated. It has been found that in Summer, human and animal microflora featuring multiple antibiotic resistance (to Ampicillin and Kanamycin) predominates in all the studied stations of the littoral zone of the lake. In Spring, concentrations of bacteria featuring multiple antibiotic resistance decrease significantly and bacteria sensitive to antibiotics predominate in the lake. Emergence of multiple antibiotic resistance in bacteria of Lake Shira is caused by the input of allochthonous bacteria into the lake; this feature of heterotrophic bacteria of Lake Shira can be used to monitor the impact on the ecosystem made by health resorts. В© 2006 Elsevier GmbH. All rights reserved.

Scopus
Держатели документа:
LTD Territory-oriented information systems, Institute of Computational Modeling, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation
Institute of Biophysics, Russian Academy of Sciences, Siberian Branch, Akademgorodok 50, 660036, Russian Federation
Center of Hygiene and Epidemiology in Krasnoyarsk Region, Sopochnaya 38, Russian Federation
Krasnoyarsk Scientific Centre, Akademgorodok 50, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Lobova, T.I.; Barkhatov, Y.V.; Salamatina, O.V.; Popova, L.Yu.

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Cell-free bioluminescent screening of translation inhibitors [Text] / A. Y. Gorokhovatsky [et al.] // Biotechnol. Appl. Biochem. - 1998. - Vol. 27. - P259-263. - Cited References: 21 . - ISSN 0885-4513

РУБ Biochemistry & Molecular Biology + Biotechnology & Applied Microbiology
Рубрики:
DIPHTHERIA-TOXIN
   MESSENGER-RNA
   SYSTEM
   PROTEINS
Аннотация: The possibility of creating new screening methods with a cell-free translation system has been demonstrated with a quantitative determination of diphtheria toxin and some antibiotics (puromycin, kanamycin and tetracycline) as examples. The approach proposed follows from the ability of various substances to inhibit protein synthesis. We used a wheat-germ cell-free translation system stabilized by freeze-drying in the presence of trehalose with the mRNA of the Ca2+-activated photoprotein obelin as a reporter template. This freeze-dried cell-free translation system allows prolonged storage of the detecting system before it is required, increases the reproducibility of the results and simplifies the application procedure. The obelin mRNA extends the sensitivity of the method owing to the high sensitivity of detection of the synthesized protein.

Держатели документа:
Russian Acad Sci, Branch Inst Bioorgan Chem, Pushchino 142292, Moscow Region, Russia
RAS, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
Tech Univ Berlin, Inst Biochem & Mol Biol, D-10587 Berlin, Germany
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Gorokhovatsky, A.Y.; Shaloiko, L.A.; Bondar, V.S.; Vysotski, E.S.; Maximov, E.E.; von Doehren, H...; Alakhov, Y.B.

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Development and morphological features of biofilms formed by transgenic and wild type strains of Bacillus subtilis [Text] / O. A. Mogilnaya, T. Y. Krylova, L. Y. Popova // Microbiol. Res. - 2003. - Vol. 158, Is. 4. - P. 327-335, DOI 10.1078/0944-5013-00212. - Cited References: 17 . - ISSN 0944-5013

РУБ Microbiology
Рубрики:
ANTIBIOTIC-RESISTANCE
MICROBIAL BIOFILMS
COMMUNITY
Кл.слова (ненормированные):
Bacillus subtilis -- biofilms -- transgenic microorganisms -- electron microscopy
Аннотация: The study addressed the ability of the transgenic strain (TM) B. subtilis 2335/pBMB 105 (Km(r)Inf(+)) to form biofilms on the surface of liquid media of various compositions, inoculated with vegetative cells and spores. The morphological features of these biofilms do not differ from those of the films formed by the recipient strain (WT) B. subtilis 2335 (Km(s)). However, the TM and the natural one differ in the dynamics of biofilm formation and the cellular composition of the films. Biofilms of the TM are formed earlier, develop at a higher rate, but decompose later than the films of the WT. When the medium is inoculated with vegetative cells, sporulation in the biofilms of both strains undergoes glucose repression; no such effect is observed when the medium is inoculated with spores. The TM does not form films when the medium is inoculated with spores and supplemented with glycerin and kanamycin.

WOS
Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Mogilnaya, O.A.; Krylova, T.Y.; Popova, L.Y.

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