International Microbiology Journal Impact Factor & Information

Publisher: Sociedad Española de Microbiología, Hemeroteca Científica Catalana

Journal description

International Microbiology, the official journal of the Spanish Society for Microbiology (SEM), aims to advance and disseminate information in the fields of basic and applied microbiology among microbiologists around the world. The journal publishes two kinds of contributions: Articles (original research and short reviews) and Complements (perspectives, opinion, book reviews, editorials, etc). A feature of International Microbiology that distinguishes it from many other microbiology journals is a broadening of the term ''microbiology'' to include eukaryotic microorganisms, as well as the publication of articles about microbiologists and their work and questions related to the history and sociology of this science. It offers short publication times and a complete copy-editing service. The journal encourages submissions in the following areas: Microorganisms (viruses, prokaryotes, protists, moulds, yeast); Microbial biology (taxonomy, genetics, morphology, physiology, ecology, pathogenesis); Microbial applications (environmental, soil, industrial, food and medical microbiology, biodeterioration, bioremediation, biotechnology); State of the art of microbiology in different regions of the world; Outstanding microbiologists; Microbiology and education; The history and sociology of microbiology.

Current impact factor: 1.33

Impact Factor Rankings

2015 Impact Factor Available summer 2016
2014 Impact Factor 1.326
2013 Impact Factor 1.341
2012 Impact Factor 2.556
2011 Impact Factor 1.8
2010 Impact Factor 1.635
2009 Impact Factor 1.8
2008 Impact Factor 2.197
2007 Impact Factor 2.617
2006 Impact Factor 2.455
2005 Impact Factor 1.868

Impact factor over time

Impact factor

Additional details

5-year impact 2.10
Cited half-life 9.80
Immediacy index 0.00
Eigenfactor 0.00
Article influence 0.61
Website International Microbiology website
Other titles International microbiology (Online)
ISSN 1139-6709
OCLC 48268850
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Hemeroteca Científica Catalana

  • Pre-print
    • Author cannot archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Creative Commons Attribution Non-Commercial Share Alike 3.0 España License
    • On a non-profit server
    • Published source must be acknowledged
    • Must link to publisher version
    • Publisher's version/PDF may be used
    • All titles are open access journals
    • This policy is an exception to the default policies of 'Hemeroteca Científica Catalana'
  • Classification

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: S-adenosyl-l-methionine (SAM) is an important molecule in the cellular metabolism of mammals. In this study, we examined several of the physiological characteristics of a SAM-accumulating strain of the yeast Scheffersomyces stipitis (M12), including SAM production, ergosterol content, and ethanol tolerance. S. stipitis M12 accumulated up to 52.48 mg SAM/g dry cell weight. Proteome analyses showed that the disruption of C-24 methylation in ergosterol biosynthesis, a step mediated by C-24 sterol methyltransferase (Erg6p), results in greater SAM accumulation by S. stipitis M12 compared to the wild-type strain. A comparative proteome-wide analysis identified 25 proteins that were differentially expressed by S. stipitis M12. These proteins are involved in ribosome biogenesis, translation, the stress response, ubiquitin-dependent catabolic processes, the cell cycle, ethanol tolerance, posttranslational modification, peroxisomal membrane stability, epigenetic regulation, the actin cytoskeleton and cell morphology, iron and copper homeostasis, cell signaling, and energy metabolism. [Int Microbiol 2015; 18(2):117-125].
    International Microbiology 10/2015; 18(2):117-125. DOI:10.2436/20.1501.01.241
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    ABSTRACT: Biofilm development is characterized by distinct stages of initial attachment, microcolony formation and maturation (sessile cells), and final detachment (dispersal of new, planktonic cells). In this work we examined the influence of polyhydroxyalkanoate (PHA) accumulation on bacterial surface properties and biofilm formation on polystyrene in detached vs. planktonic cells of an environmental strain isolated from microbial mats, Halomonas venusta MAT28. This strain was cultured either in an artificial biofilm in which the cells were immobilized on alginate beads (sessile) or as free-swimming (planktonic) cells. For the two modes of growth, conditions allowing or preventing PHA accumulation were established. Cells detached from alginate beads and their planktonic counterparts were used to study cell surface properties and cellular adhesion on polystyrene. Detached cells showed a slightly higher affinity than planktonic cells for chloroform (Lewis-acid) and a greater hydrophobicity (affinity for hexadecane and hexane). Those surface characteristics of the detached cells may explain their better adhesion on polystyrene compared to planktonic cells. Adhesion to polystyrene was not significantly different between H. venusta cells that had accumulated PHA vs. those that did not. These observations suggest that the surface properties of detached cells clearly differ from those of planktonic cells and that for at least the first 48 h after detachment from alginate beads H. venusta retained the capacity of sessile cells to adhere to polystyrene and to form a biofilm. © 2015 Sociedad Espanola de Microbiologia. All rights reserved.
    International Microbiology 09/2015; 17(4):205-212. DOI:10.2436/20.1501.01.223
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    ABSTRACT: Knowledge in viral oncology has made considerable progress in the field of cancer fight. However, the role of bacteria as mediators of oncogenesis has not yet been elucidated. As cancer still is the leading cause of death in developed countries, understanding the long-term effects of bacteria has become of great importance as a possible means of cancer prevention. This study reports that Chlamydia pneumoniae infection induce transformation of human mesothelial cells. Mes1 cells infected with C. pneumoniae at a multiplicity of infection of 4 inclusion-forming units/cell showed many intracellular inclusion bodies. After a 7-day infection an increased proliferative activity was also observed. Real-time PCR analysis revealed a strong induction of calretinin, Wilms' tumour gene 1, osteopontin, matrix metalloproteinases-2, and membrane-type 1 metal-loproteinases gene expression in Mes1 cell, infected for a longer period (14 days). The results were confirmed by western blot analysis. Zymography analysis showed that C. pneumoniae modulated the in-vitro secretion of MMP-2 in Mes1 cells both at 7 and 14 days. Cell invasion, as measured by matrigel-coated filter, increased after 7 and 14 days infection with C. pneumoniae, compared with uninfected Mes1 cells. The results of this study suggest that C. pneumoniae infection might support cellular transformation, thus increasing lung cancer risk. © 2015 Sociedad Espanola de Microbiologia. All rights reserved.
    International Microbiology 09/2015; 17(4):185-193. DOI:10.2436/20.1501.01.221
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    ABSTRACT: We evaluated the genetic stabilization of artificial intra- (Saccharomyces cerevisiae) and interspecific (S. cerevisiae × S. kudriavzevii) hybrids under wine fermentative conditions. Large-scale transitions in genome size and genome reorganizations were observed during this process. Interspecific hybrids seem to need fewer generations to reach genetic stability than intraspecific hybrids. The largest number of molecular patterns recovered among the derived clones was observed for intraspecific hybrids, particularly for those obtained by rare-mating. Molecular marker analyses revealed that unstable clones could change during the industrial process to obtain active dry yeast. When no changes in molecular markers and ploidy were observed after this process, no changes in genetic composition were confirmed by comparative genome hybridization, considering the clone as a stable hybrid. According to our results, under these conditions, fermentation steps 3 and 5 (30–50 generations) would suffice to obtain genetically stable interspecific and intraspecific hybrids, respectively. © 2015 Sociedad Espanola de Microbiologia. All rights reserved.
    International Microbiology 09/2015; 17(4):213-224. DOI:10.2436/20.1501.01.224
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    ABSTRACT: The hypothetical capacity of amphotericin B to suppress the formation of germ-tubes, which is the first step of yeast-to-hypha conversion in Candida albicans, has been investigated in the wild-type strain CEY. 1 (CAI.4-URA+). Exponential cells exposed to concentrations of amphotericin B below or around the MIC90, exhibited a weak reduction in the percentage of human serum-induced germ-tube formation at 37°C compared with a non-exposed control. However, the dimorphic transition was drastically suppressed after addition of potentially lethal doses of amphotericin B, which also caused severe cell killing. In contrast, an identical experimental approach carried out with the fungistatic compound 5-fluorocytosine had no significant effect on the level of the germ-tube formation. Together, these results strongly point to a close correlation between the fungicidal action of amphotericin B and its ability to impair morphogenetic conversion in C. albicans. © 2015, Sociedad Espanola de Microbiologia. All rights reserved.
    International Microbiology 09/2015; 18(1):25-31. DOI:10.2436/20.1501.01.231
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    ABSTRACT: To ensure the microbiological quality, consumer safety and organoleptic properties of cosmetic products, manufacturers need to comply with defined standards using several preservatives and disinfectants. A drawback regarding the use of these preservatives is the possibility of generating cross-insusceptibility to other disinfectants or preservatives, as well as cross resistance to antibiotics. Therefore, the objective of this study was to understand the adaptive mechanisms of Enterobacter gergoviae, Pseudomonas putida and Burkholderia cepacia that are involved in recurrent contamination in cosmetic products containing preservatives. Diminished susceptibility to formaldehyde-donors was detected in isolates but not to other preservatives commonly used in the cosmetics industry, although increasing resistance to different antibiotics (β-lactams, quinolones, rifampicin, and tetracycline) was demonstrated in these strains when compared with the wild-type strain. The outer membrane protein modifications and efflux mechanism activities responsible for the resistance trait were evaluated. The development of antibiotic-resistant microorganisms due to the selective pressure from preservatives included in cosmetic products could be a risk for the emergence and spread of bacterial resistance in the environment. Nevertheless, the large contribution of disinfection and preservation cannot be denied in cosmetic products. © 2015, Sociedad Espanola de Microbiologia. All rights reserved.
    International Microbiology 09/2015; 18(1):51-59. DOI:10.2436/20.1501.01.234
  • [Show abstract] [Hide abstract]
    ABSTRACT: The protective effects of encapsulation on the survival of Lactobacillus reuteri and the retention of the bacterium's probiotic properties under simulated gastrointestinal conditions were investigated. Viable counts and the remaining probiotic properties of calcium (Ca)-alginate encapsulated (A group), chitosan-Ca-alginate encapsulated (CA group), and unencapsulated, free L. reuteri (F group) were determined. Encapsulation improved the survival of L. reuteri subjected to simulated gastrointestinal conditions, with the greatest protective effect achieved in the CA group. The degree of cell membrane injury increased with increasing bile salt concentrations at constant pH, but the extent of injury was less in the encapsulated than in the free cells. Adherence rates were, in descending order: CA (0.524%) > A (0.360%) > F (0.275%). Lactobacillus reuteri cells retained their antagonistic activity toward Listeria monocytogenes even after incubation of the lactobacilli under simulated gastrointestinal conditions. Displacement of the pathogen by cells released from either of the encapsulation matrices was higher than that by free cells. The safety of L. reuteri was demonstrated in an in vitro invasion assay. © 2015, Sociedad Espanola de Microbiologia. All rights reserved.
    International Microbiology 09/2015; 18(1):61-69. DOI:10.2436/20.1501.01.235