Current Microbiology (Curr Microbiol)

Publisher: Springer Verlag

Journal description

Current Microbiology offers a means of rapid publication of timely new information dealing with all aspects of microbial cells including prokaryotes and eukaryotes and, where appropriate, viruses. The topics included are general, medical, and applied microbiology and virology and span the disciplines of physiology, biochemistry, genetics, biotechnology, morphology, taxonomy, diagnostic methods, and immunology as applied to microorganisms. Papers describing new methodologies will also be considered. A series of short papers on the same or related topic is not appropriate for Current Microbiology.

Current impact factor: 1.42

Impact Factor Rankings

2016 Impact Factor Available summer 2017
2014 / 2015 Impact Factor 1.423
2013 Impact Factor 1.359
2012 Impact Factor 1.52
2011 Impact Factor 1.815
2010 Impact Factor 1.51
2009 Impact Factor 1.33
2008 Impact Factor 1.33
2007 Impact Factor 1.167
2006 Impact Factor 1.007
2005 Impact Factor 1.059
2004 Impact Factor 1.075
2003 Impact Factor 1.125
2002 Impact Factor 1.21
2001 Impact Factor 1.059
2000 Impact Factor 1.029
1999 Impact Factor 1.165
1998 Impact Factor 1.094
1997 Impact Factor 1.011
1996 Impact Factor 1.092
1995 Impact Factor 0.962
1994 Impact Factor 0.983
1993 Impact Factor 1.087
1992 Impact Factor 0.94

Impact factor over time

Impact factor
Year

Additional details

5-year impact 1.59
Cited half-life 7.70
Immediacy index 0.32
Eigenfactor 0.01
Article influence 0.42
Website Current Microbiology website
Other titles Current microbiology (Online)
ISSN 1432-0991
OCLC 41223110
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Springer Verlag

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Author's pre-print on pre-print servers such as arXiv.org
    • Author's post-print on author's personal website immediately
    • Author's post-print on any open access repository after 12 months after publication
    • Publisher's version/PDF cannot be used
    • Published source must be acknowledged
    • Must link to publisher version
    • Set phrase to accompany link to published version (see policy)
    • Articles in some journals can be made Open Access on payment of additional charge
  • Classification
    green

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: frxA gene has been implicated in the metronidazole nitro reduction by H. pylori. Alternatively, frxA is expected to contribute to the protection of urease and to the in vivo survival of H. pylori. The aim of present study is to report the mutation effects on the frxA protein sequence in clinical isolates of H. pylori in our community. Metronidazole resistance was proven in 27 of 48 isolates. glmM and frxA genes were used for molecular confirmation of H. pylori isolates. The primer set for detection of whole sequence of frxA gene for the effect of mutation on protein sequence was used. DNA and protein sequence evaluation and analysis were done by blast, Clustal Omega, and T COFFEE programs. Then, FrxA protein sequences from six metronidazole-resistant clinical isolates were analyzed by web-based bioinformatics tools. The result of six metronidazole-resistant clinical isolates in comparison with strain 26695 showed ten missense mutations. The result with the STRING program revealed that no change was seen after alterations in these sequences. According to consensus data involving four methods, residue substitutions at 40, 13, and 141 increase the stability of protein sequence after mutation, while other alterations decrease. Residue substitutions at 40, 43, 141, 138, 169, and 179 are deleterious, while, V7I, Q10R, V34I, and V96I alterations are neutral. As FrxA contribute to survival of bacterium and in regard to the effect of mutations on protein function, it might affect the survival and bacterium phenotype and it need to be studied more. Also, none of the stability prediction tool is perfect; iStable is the best predictor method among all methods.
    No preview · Article · Jan 2016 · Current Microbiology
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    ABSTRACT: This study was to investigate the effects of live or autoclaved Bacillus subtilis natto, their fermented products and media on rumen fermentation and rumen functional bacteria in vitro. Rumen fluid from three multiparous lactating Holstein cows was combined and transferred into serum bottles after diluted. Fifteen serum bottles were divided into five treatments, which were designed as following: CTR (the fermentation of 0.5 g TMR and ruminal fluids from dairy cows), LBS (CTR plus a minimum of 10(11) cfu live Bacillus subtilis natto), ABS (CTR plus a minimum of 10(11) cfu autoclaved Bacillus subtilis natto), BSC (CTR plus 1 ml Bacillus subtilis natto fermentation products without bacteria), and BSM (CTR plus 1 ml liquid fermentation medium). When separated from the culture, live Bacillus subtilis natto individually increased the concentrations of ammonia-N (P < 0.01), MCP production (P < 0.01), and tended to elevate total VFA (P = 0.07), but decreased the ratio of acetate and propionate (P < 0.01). Autoclaved Bacillus subtilis natto has the similar function with the live bacteria except for the ratio of acetate and propionate. Except B. fibrisolvens, live or autoclaved Bacillus subtilis natto did not influence or decreased the 16S rRNA gene quantification of the detected bacteria. BSC and BSM altered the relative expression of certain functional bacteria in the rumen. These results indicated that it was Bacillus subtilis natto thalli that played the important role in promoting rumen fermentation when applied as a probiotic in dairy ration.
    No preview · Article · Jan 2016 · Current Microbiology
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    ABSTRACT: Endophytic bacterial communities of halophyte Salicornia europaea roots were analyzed by 16S rRNA gene pyrosequencing. A total of 20,151 partial 16S rRNA gene sequences were obtained. These sequences revealed huge amounts of operational taxonomic units (OTUs), that is, 747-1405 OTUs in a root sample, at 3 % cut-off level. Root endophytes mainly comprised four phyla, among which Proteobacteria was the most represented, followed by Bacteroidetes, Actinobacteria, and Firmicutes. Gammaproteobacteria was the most abundant class of Proteobacteria, followed by Betaproteobacteria and Alphaproteobacteria. Genera Pantoea, Halomonas, Azomonas, Serpens, and Pseudomonas were shared by all growth periods. A marked difference in endophytic bacterial communities was evident in roots from different host life-history stages. Gammaproteobacteria increased during the five periods, while Betaproteobacteria decreased. The richest endophytic bacteria diversity was detected in the seedling stage. Endophytic bacteria diversity was reduced during the flowering stage and fruiting stage. The five libraries contained 2321 different OTUs with 41 OTUs in common. As a whole, this study first surveys communities of endophytic bacteria by tracing crucial stages in the process of halophyte growth using high-throughput sequencing methods.
    No preview · Article · Jan 2016 · Current Microbiology
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    ABSTRACT: A Gram-negative, rod shaped and non-spore-forming bacterium, strain H642(T), was isolated from a desert sample collected from Xinjiang province of China, and subjected to a polyphasic taxonomic investigation. Strain H642(T) grew between 20 and 40 °C (optimal 28-37 °C), pH 6.0-10.0 (optimal 7.0-9.0) and at NaCl concentrations between 1.0 and 20.0 % (optimal 2.0-8.0 %). It was positive for catalase, but negative for oxidase. Ubiquinone-10 was present as the major respiratory ubiquinone. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, four unknown glycolipids and one unknown lipid. Phylogenetic analysis of the 16S rRNA gene sequence revealed that strain H642(T) belongs to the genus Pelagibacterium. Strain H642(T) was most closely related to Pelagibacterium halotolerans (with 98.4 % similarity), Pelagibacterium nitratireducens (97.3 %) and Pelagibacterium luteolum (96.2 %). DNA-DNA reassociation values between strain H642(T), P. halotolerans B2(T) and P. nitratireducens JLT2005(T) were 38.0 and 25.3 %, respectively. The genomic DNA G + C content of strain H642(T) was determined to be 44.4 mol%. Based on genotypic, chemotaxonomic and phenotypic data, strain H642(T) represents a novel species of the genus Pelagibacterium, for which the name Pelagibacterium lixinzhangensis sp. nov is proposed. The type strain is H642(T) (=CGMCC 1.10230(T)=JCM 16597(T)).
    No preview · Article · Jan 2016 · Current Microbiology
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    ABSTRACT: The present work aims to contribute for the elucidation of the role of oxidative stress in the toxicity associated with the exposure of Pichia kudriavzevii to multi-metals (Cd, Pb and Zn). Cells of the non-conventional yeast P. kudriavzevii exposed for 6 h to the action of multi-metals accumulated intracellular reactive oxygen species (ROS), evaluated through the oxidation of the probe 2',7'-dichlorodihydrofluorescein diacetate. A progressive loss of membrane integrity (monitored using propidium iodide) was observed in multi-metal-treated cells. The triggering of intracellular ROS accumulation preceded the loss of membrane integrity. These results suggest that the disruption of membrane integrity can be attributed to the oxidative stress. The exposure of yeast cells to single metal showed that, under the concentrations tested, Pb was the metal responsible for the induction of the oxidative stress. Yeast cells coexposed to an antioxidant (ascorbic acid) and multi-metals did not accumulate intracellular ROS, but loss proliferation capacity. Together, the data obtained indicated that intracellular ROS accumulation contributed to metal toxicity, namely for the disruption of membrane integrity of the yeast P. kudriavzevii. It was proposed that Pb toxicity (the metal responsible for the toxic symptoms under the conditions tested) result from the combination of an ionic mechanism and the intracellular ROS accumulation.
    No preview · Article · Jan 2016 · Current Microbiology
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    ABSTRACT: Although herpes simplex virus type-1 (HSV-1), and type-2 (HSV-2), Staphylococcus aureus and Candida albicans co-habit the oral and genital mucosa, their interaction is poorly understood. We determined the effect HSV has on bacterial and/or fungal adherence, the initial step in biofilm formation. HeLa229 cells were infected with HSV-1 (KOS) gL86 or HSV-2 (KOS) 333gJ− at a multiplicity of infection (MOI) of 50 and 10. S. aureus (ATCC 25923) and/or C. albicans (yeast forms or germ tube forms) were co-incubated for 30 min (37 °C; 5 % CO2; 5:1 organism: HeLa cell ratio; n = 16) with virus-infected HeLa cells or uninfected HeLa cell controls. Post-incubation, the monolayers were washed (3x; PBS), lysed (RIPA), and the lysate plated onto Fungisel and/or mannitol salts agar for standard colony count. The level of HeLa-associated S. aureus was significantly decreased (P < 0.05) for both HSV-1- and HSV-2-infected cells, as compared to virus-free HeLa cell controls (38 and 59 % of control, respectively). In contrast, HSV-1 and HSV-2 significantly (P < 0.05) enhanced HeLa cell association of C. albicans yeast forms and germ tube approximately two-fold, respectively. The effect of S. aureus on germ tube and yeast form adherence to HSV-1- and HSV-2-infected cells was specific for the Candida phenotype tested. Our study suggests that HSV, while antagonist towards S. aureus adherence enhances Candida adherence. Furthermore, the combination of the three pathogens results in S. aureus adherence that is either unaffected, or partially restored depending on both the herpes viral species and the fungal phenotype present.
    No preview · Article · Jan 2016 · Current Microbiology
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    ABSTRACT: A range of phenolic acids, viz., p-coumaric acid, 4-hydroxybenzaldehyde, 4-hydroxybenzoic acid, protocatechuic acid, caffeic acid, ferulic acid, and cinnamic acid have been isolated and identified by LC-MS analysis in roots and root nodules of Mimosa pudica. The effects of identified phenolic acids on the regulation of nodulation (nod) genes have been evaluated in a betarhizobium isolate of M. pudica root nodule. Protocatechuic acid and p-hydroxybenzoic acid were most effective to induce nod gene, whereas caffeic acid has no significant effect. Phenylalanine ammonia-lyase, peroxidase and polyphenol oxidase activity was estimated indicating regulation and metabolism of phenolic acids in root nodules. These results indicate that nodD gene expression of betarhizobium is regulated by simple phenolic acids as protocatechuic acid and p-hydroxybenzoic acid present in host root nodule and sustain nodule organogenesis.
    No preview · Article · Jan 2016 · Current Microbiology
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    ABSTRACT: Gallibacterium anatis has the ability to hemagglutinate rabbit erythrocytes; however, no bacterial component has yet been associated with this function. In the present work, a protein of approximately 65 kDa with hemagglutinating activity for glutaraldehyde-fixed chicken erythrocytes was purified by ion interchange chromatography from G. anatis F149(T) secreted proteins. The protein was recognized by a rabbit polyclonal serum against a hemagglutinin from Avibacterium paragallinarum. The 65 kDa purified protein presented identity with a G. anatis filamentous hemagglutinin by mass spectrometric analysis. As well, the bacterial surface of G. anatis was labeled by immune gold assays using a polyclonal serum against the 65-kDa protein. A similar protein was recognized in four other G. anatis strains by immunoblots using the same antiserum. The protein binds sheep or pig biotinylated fibrinogen, suggesting an interaction with basement membrane eukaryotic cells components, and the protein is present in G. anatis biofilms. Overall, the results suggest that the 65 kDa hemagglutinin is a common antigen and a potential virulence factor in G. anatis.
    No preview · Article · Jan 2016 · Current Microbiology
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    ABSTRACT: Bakanae disease is a destructive rice disease in South Korea caused by Fusarium fujikuroi infection. Chemical fungicides have been used to manage the disease, but the emergence of fungicide-resistant strains has gradually increased. Two chelating agents, chitosan oligosaccharides (COS) and ethylenediaminetetraacetatic acid (EDTA), are well known as biosafe and biocompatible antimicrobial agents. In this study, we compared the actions of COS and EDTA to gain a better understanding of the underlying antimicrobial activities and to evaluate them as eco-friendly fungicides against F. fujikuroi. While COS exhibited a rapid fungicidal effect on hyphal growing cells within 5 min, EDTA had a fungistatic effect on reversible growth inhibition. Scanning electron microscopy revealed that COS treatment resulted in pore-formation and cellular leakage along the growing hyphae, whereas EDTA caused no significant morphological changes. COS activity was greatly suppressed by the addition of Ca(2+) to the medium, and EDTA action was largely suppressed by Mn(2+) and slightly by Ca(2+), respectively. Taken together, these results indicated that two chelating agents, COS and EDTA, have different modes of antimicrobial action on F. fujikuroi. Thus, the combination of chelating agents having different modes of action might be an effective disease management strategy to prevent or delay the development of fungicide-resistant strains.
    No preview · Article · Jan 2016 · Current Microbiology
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    ABSTRACT: Immediate early (IE) genes are transcribed immediately after infection in BHV1 from two different immediate early transcription units. It is reported that the immediate early transcription unit I (IE TU1) of Bovine herpesvirus 1 (BHV1) transcribes two proteins BICP0 and BICP4 from a single promoter by alternative splicing but with identical 5'UTR. We found that the transcripts of BICP0 and BICP4 have different 5'UTRs. The bioinformatics analysis shows two similar spatially arranged TATA less promoter for the two transcripts. The bioinformatics analysis also showed a similar promoter for the IE TU2 which transcribes BICP22. The data strongly suggest that BICP0 and BICP4 are transcribed from two different promoters. The transcript produced by each promoter is spliced specifically as opposed to what has been reported earlier. The BICP0 and BICP4 also show different levels of expression. The expression level of BICP4 continuously declines after attaining a peak level at 1 h, while BICP0 shows biphasic expression supporting the earlier observation that it is expressed from two different promoters.
    No preview · Article · Dec 2015 · Current Microbiology
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    ABSTRACT: Mastitis is defined as the inflammatory response resulting of the infection of the udder tissue and it is reported in numerous species, namely in domestic dairy animals. This pathology is the most frequent disease of dairy cattle and can be potentially fatal. Mastitis is an economically important pathology associated with reduced milk production, changes in milk composition and quality, being considered one of the most costly to dairy industry. Therefore, the majority of research in the field has focused on control of bovine mastitis and many efforts are being made for the development of new and effective anti-mastitis drugs. Antibiotic treatment is an established component of mastitis control programs; however, the continuous search for new therapeutic alternatives, effective in the control and treatment of bovine mastitis, is urgent. This review will provide an overview of some conventional and emerging approaches in the management of bovine mastitis' infections.
    No preview · Article · Dec 2015 · Current Microbiology
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    ABSTRACT: We recently found lytic action of the truncated yncE gene. When the truncated yncE gene of Salmonella enterica serovar Paratyphi A was expressed in Escherichia coli DH5α under the control of the Ara promoter, bacterial growth was markedly inhibited. In the present study, we characterized this lytic action. The N-terminal 103 aa of YncE, containing a signal peptide, was demonstrated to be essential for inhibition. Microscopic observation showed that the bacterial envelope of E. coli was damaged by the expression of truncated yncE, resulting in the release of cytoplasmic content and the formation of bacterial ghosts. The addition of MgSO4 or spermine, which is the stabilizer of bacterial membrane structure, dramatically reversed the cell lysis induced by the toxic truncated YncE. In contrast, the lytic action was significantly enhanced by the addition of SDS or EDTA. Our data indicated that the toxic truncated YncE could cause cell lysis by the disruption of the bacterial membrane.
    No preview · Article · Dec 2015 · Current Microbiology
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    ABSTRACT: A Gram-negative, strictly aerobic, chemoheterotrophic, pale-yellow pigmented, non-motile, rod-shaped bacterial strain, designated MN1-138(T), was isolated from water in the tidal zone at the estuary of Heita river, Iwate, Japan, using an in situ cultivation technique. Preliminary analysis based on the 16S rRNA gene sequence revealed that the novel isolate is affiliated with the family Flavobacteriaceae of the phylum Bacteroidetes, and the highest sequence similarities were found with the species Wenyingzhuangia heitensis H-MN17(T) (97.3 %). The DNA-DNA relatedness between values between strains MN1-138(T) and W. heitensis H-MN17(T) was 34 %. The DNA G+C content of strain MN1-138(T) was determined to be 33.1 mol%; MK-6 was identified as the major menaquinone; and the presence of iso-C15:0, iso-C15:0 3-OH, and iso-C17:0 3-OH as the major (>10 %) cellular fatty acids. A polar lipid profile was present consisting of phosphatidylethanolamine, two unidentified glycolipids, and two unidentified lipids. From the distinct phylogenetic position and combination of genotypic and phenotypic characteristics, the strain is considered to represent a novel species of the genus Wenyingzhuangia for which the name Wenyingzhuangia aestuarii sp. nov. is proposed. The type strain of W. aestuarii sp. nov. is MN1-138(T) (=KCTC 42780(T) = NBRC 111505(T)).
    No preview · Article · Dec 2015 · Current Microbiology
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    ABSTRACT: The methicillin-resistant Staphylococcus aureus causes difficult-to-treat healthcare-associated infections in humans. For fast and effective selection of an appropriate antibiotic therapy, it is essential to have rapid and reliable methods for differentiation of methicillin-resistant S. aureus from less dangerous methicillin-sensitive S. aureus. There have been many methods for the identification of methicillin-resistant S. aureus described but none has been accepted as an international standard. The most commonly used techniques such as phenotyping and genotyping have a few disadvantages, for instance, these techniques are not reproducible and stable. In addition, they are time-consuming, expensive, and they are not capable to distinguish all S. aureus strains. In this study, the methicillin-resistant and methicillin-sensitive S. aureus isolates obtained from patients were extracted in hot water. The released proteins were characterised by sodium dodecyl sulphate polyacrylamide gel electrophoresis and gel isoelectric focusing. These two methods were able to differentiate among tested bacterial strains. The proposed methods are time saving, they are applicable in standard biochemical laboratories, and they do not require any expensive equipment.
    No preview · Article · Dec 2015 · Current Microbiology
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    ABSTRACT: Lactobacillus strains producing bacteriocins have attracted highly attention as probiotic cultures in animal nutrition since the use of antibiotics was forbidden in the livestock industry. Lactobacillus plantarum LB-B1 isolated from the fermented dairy product can produce pediocin PA-1, which has a strong inhibition of Listeria but hardly any influence on Gram-negative spoilage agents. In this work, L. plantarum LB-B1 was selected as the host to express microcin V using the leader peptide of pediocin PA-1. Well-diffusion assay combined with Tricine-SDS-polyacrylamide gel showed that microcin V could be successfully expressed and secreted in L. plantarum LB-B1. Meanwhile, the production of microcin V did not affect the secretion of pediocin PA-1. It is worthwhile noted that the supernatant from L. plantarum 8148-ColV had a more effective inhibition of Listeria than that from the control strain L. plantarum 8148. Furthermore, this supernatant also unexpectedly produced antibacterial activity against Staphylococcus aureus. Taken altogether, these results suggested that pediocin PA-1 and microcin V in the supernatant could generate synergistic effect, which not only enhanced the antibacterial ability but also expanded the antibacterial spectrum. Therefore, the recombinant strain has a great potential application as a probiotic to reduce the level of enteric pathogens in livestock industry.
    No preview · Article · Dec 2015 · Current Microbiology