Current Microbiology Journal Impact Factor & Information

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

2015 Impact Factor Available summer 2016
2014 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

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

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  • Classification

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Four Gram-negative-staining, facultatively anaerobic bacterial isolates were obtained from the fruiting bodies of the edible mushroom Pleurotus eryngii showing symptoms of bacterial blight disease in Beijing, China. Nearly complete 16S rRNA gene sequencing placed these isolates in the genus Pantoea. Multilocus sequence analysis based on the partial sequences of atpD, gyrB, infB and rpoB revealed Pantoea agglomerans as their closest phylogenetic relatives. DNA-DNA hybridization and phenotypic tests confirmed the classification of the new isolates as a novel species. The name Pantoea pleuroti sp. nov. [type strain KCTC 42084(T) = CGMCC 1.12894(T) = JZB 2120015(T)] is proposed.
    Current Microbiology 11/2015; DOI:10.1007/s00284-015-0940-5
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    ABSTRACT: Phosphate-solubilizing bacteria have the ability of solubilizing mineral phosphate in soil and promoting growth of plants, but the activity of phosphate solubilization is influenced by exogenous soluble phosphate. In the present study, the effects of soluble phosphate on the activity of phosphate solubilization, acidification of media, growth, and organic acid secretion of phosphate-solubilizing bacterium Pseudomonas frederiksbergensis JW-SD2 were investigated under six levels of soluble phosphate conditions. The activity of phosphate solubilization decreased with the increase of soluble phosphate concentration, accompanying with the increase of media pH. However, the growth was promoted by adding soluble phosphate. Production of gluconic, tartaric, and oxalic acids by the strain was reduced with the increase of concentration of soluble phosphate, while acetic and pyruvic acids showed a remarkable increase. Gluconic acid predominantly produced by the strain at low levels of soluble phosphate showed that this acid was the most efficient organic acid in phosphate solubilization. Pyrroloquinoline quinone-glucose dehydrogenase gene gcd (pg5SD2) was cloned from the strain, and the expressions of pg5SD2 gene were repressed gradually with the increase of concentration of soluble phosphate. The soluble phosphate regulating the transcription of the gcd gene is speculated to underlie the regulation of the secretion of gluconic acid and subsequently the regulation of the activity of phosphate solubilization. Future research needs to consider a molecular engineering strategy to reduce the sensitivity of PSB strain to soluble phosphate via modification of the regulatory mechanism of gcd gene, which could improve the scope of PSB strains' application.
    Current Microbiology 11/2015; DOI:10.1007/s00284-015-0938-z
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    ABSTRACT: The high concentrations of essential oils are generally required to receive microbial purity of the products (cosmetics, medicine). On the other hand, their application due to the high concentration of essential oils may be limited by changes in organoleptic and textural quality of the products, as well as they cause irritation and allergies in users. Addition of linalool to essential oil may significantly enhance its antimicrobial effectiveness and reduce their concentrations in products, taking advantage of their synergistic and additive effects. The aim of the study was to compare antimicrobial activity of essential oil alone and in combination with linalool. The antimicrobial activity of the essential oil of Thymus vulgaris, Juniperus communis, Pelargonium graveolens, Citrus bergamia, Citrus grandis, Lavandula angustifolia, Cinnamomum zeylanicum, Melaleuca alternifolia, Syzygium aromaticum, linalool and their combination was investigated against bacteria and fungi using the disc diffusion method. The addition of linalool to S. aromaticum oil in a synergistic manner enhanced its antimicrobial efficacy against P. aeruginosa and A. brasiliensis. Moreover, the additive interaction between this oil and linalool was observed against S. aureus, E. coli and C. albicans. It was also found that linalool in an additive manner increased the antimicrobial effectiveness of T. vulgaris oil against P. aeruginosa. The antimicrobial properties of mixture of essential oils with their active constituents may be used for creating new strategies to maintain microbiological purity of products.
    Current Microbiology 11/2015; DOI:10.1007/s00284-015-0933-4
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    ABSTRACT: Cationic antimicrobial peptides (CAPs) are essential components of the innate immune system. Most CAPs exert antimicrobial effects via membrane-active mechanisms, while high concentrations of CAPs are associated with non-selective cytotoxicity. We originally hypothesized that a sub-lethal concentration of CAPs was able to exert antibacterial activity, by interacting with negatively charged nucleic acids, and not by damaging bacterial membranes. We selected pleurocidin (Ple) and Escherichia coli as experimental models of CAPs and bacteria, respectively. Whereas Ple distinctly acted on bacterial membranes in a concentration-dependent manner, the cell viability was almost similar regardless the peptide concentration. To address how Ple retained its antibacterial activity in a low concentration, we particularly focused on the induction of intracellular apoptosis-like death (ALD). Finally, it was suggested that a sub-lethal concentration of Ple led to ALD in E. coli, mediated by caspase-like protein and RecA. To the best of our knowledge, this is the first study showing that alterations of CAP mechanisms are concentration dependent in bacteria.
    Current Microbiology 11/2015; DOI:10.1007/s00284-015-0937-0
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    ABSTRACT: Riemerella anatipestifer (R. anatipestifer) is among the most prevalent duck pathogens, causing acute or chronic septicemia characterized by serositis. Riemerella anatipestifer can be grown on blood-enriched media, in vitro, which provides a hemin source essential for the sustainment of R. anatipestifer and activation of hemin-uptake systems. However, the genes associated with hemin uptake cannot be identified exclusively through genome sequence analysis. Here, we show that R. anatipestifer encodes outer-membrane hemin-binding proteins. Hemin-binding proteins were identified in the cytoplasm with apparent molecular mass of ~45/37/33/23/20/13 kDa, and outer membrane with apparent molecular mass of ~90/70/60/50/15 kDa by batch affinity chromatography and hemin-blotting assays. Our results indicate that these proteins are involved in hemin acquisition. Finally, hemin-binding assay further showed that R. anatipestifer can bind hemin and this capability is increased in iron limited medium, indicating the hemin-uptake system of R. anatipestifer was regulated by iron.
    Current Microbiology 11/2015; DOI:10.1007/s00284-015-0932-5
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    ABSTRACT: In this study, we conducted a meta-analysis on 16S rRNA gene sequences of bovine fecal origin that are publicly available in the RDP database. A total of 13,663 sequences including 603 isolate sequences were identified in the RDP database (Release 11, Update 1), where 13,447 sequences were assigned to 10 phyla, 17 classes, 28 orders, 59 families, and 110 genera, while the remaining 216 sequences could not be assigned to a known phylum. Firmicutes and Bacteroidetes were the first and the second predominant phyla, respectively. About 41 % of the total sequences could not be assigned to a known genus. The total sequences were assigned to 1252 OTUs at 97 % sequence similarity. A small number of OTUs shared among datasets indicate that fecal bacterial communities of cattle are greatly affected by various factors, specifically diet. This study may guide future studies to further analyze fecal bacterial communities of cattle.
    Current Microbiology 11/2015; DOI:10.1007/s00284-015-0931-6
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    ABSTRACT: A novel bacterium, designated U33(T), was isolated from a soil sample collected in Mykhailyky, Poltavs'ka oblast, Ukraine. The bacterium was aerobic, Gram-positive, spore-forming, and consists of motile rods. The taxonomic position of strain U33(T) was studied by a polyphasic approach, and the results clearly showed that the phenotypic and chemotaxonomic properties are consistent with those of the genus Aneurinibacillus. The phylogenic analysis with 16S rRNA gene sequence of strains U33(T) showed the highest sequence similarity to those of Aneurinibacillus aneuriniticus ATCC 12856(T) (96.7 %), Aneurinibacillus migulanus DSM 2895(T) (96.7 %), Aneurinibacillus danicus NCIMB 13288(T) (95.8 %), and lower sequence similarity with other members of the genus Aneurinibacillus. Growth was observed at 20-55 °C (optimum, 37 °C) at pH 5.0-9.0 (optimum, pH 7) and with 0-5 % (w/v) NaCl (optimum, 2 % NaCl). The predominant menaquinone was MK-7 and the cell wall peptidoglycan consist of meso-diaminopimelic acid. The major cellular fatty acids are iso-C15:0 (58.0 %) and anteiso-C15:0 (13.2 %). The DNA G+C content of the strain U33(T) was 45.8 %. The physiological and chemotaxonomic characteristics distinguish strain U33(T) from the validly published species of genus Aneurinibacillus, and therefore, we consider this strain to represent a novel species of the genus Aneurinibacillus. The name Aneurinibaciilus humi sp. nov. is proposed with strain U33(T) (= KEMC7305-119(T) = JCM19865(T)) as the type strain.
    Current Microbiology 11/2015; DOI:10.1007/s00284-015-0930-7
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    ABSTRACT: As unique ecological systems, glaciers are characterized by low temperatures and low nutrient levels, which allow them to be considered as "living fossils" for the purpose of researching the evolution of life and the environmental evolution of the earth. Glaciers are also natural microbial "reservoirs". In this work, a lytic cold-active bacteriophage designated MYSP06 was isolated from Janthinobacterium sp. MYB06 from the Mingyong Glacier in China, and its major characteristics were determined. Electron microscopy revealed that bacteriophage MYSP06 had an isometric head (74 nm) and a long tail (10 nm in width, 210 nm in length). It was classified as a Siphoviridae with an approximate genome size of 65-70 kb. A one-step growth curve revealed that the latent and burst periods were 95 and 65 min, respectively, with an average burst size of 16 bacteriophage particles per infected cell. The bacteriophage particles (100 %) adsorbed to the host cells within 10 min after infection. Moreover, the pH value and thermal stability of bacteriophage MYSP06 were also investigated. The maximum stability of the bacteriophage was observed at the optimal pH 7.0, and the bacteriophage became completely unstable at the extremely alkaline pH 11.0; however, it was comparatively stable at the acidic alkaline pH 6.0. As MYSP06 is a cold-active bacteriophage with a lower production temperature, its characterization and its relationship with its host Janthinobacterium sp. MYB06 deserve further study.
    Current Microbiology 10/2015; DOI:10.1007/s00284-015-0926-3
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    ABSTRACT: The monitoring of wastewater treatment plants is important for their proper functioning as well as for re-use of water and also to avoid possible circulation of human or animal pathogens in our environment. The samples in this study originated from a full-scale wastewater treatment plant where the structure of the bacterial community was monitored using 454-pyrosequencing. The composition differed in different parts of the plant. In the effluent, bacteria belonging to phyla Proteobacteria, Actinobacteria, TM7 and Bacteroidetes were most frequently detected. The presence of Mycobacterium sp., Mycobacterium avium, Norovirus, Hepatitis A and E viruses was examined using quantitative real-time PCR. Mycobacterium sp. was detected in the effluent in quantities of up to 10(4) cells/ml. Mycobacterium avium subsp. paratuberculosis and subsp. hominissuis were detected in amounts of up to 10(3) cells/ml, and Norovirus group 1 and 2 were also detected. Our findings show the importance of monitoring and controlling the occurrence of specific pathogens in effluent, mainly because of the negative impact on human health when the water is reused.
    Current Microbiology 10/2015; DOI:10.1007/s00284-015-0924-5
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    ABSTRACT: Recent studies have focused on foodborne or commensal bacteria as vehicles of antibiotic resistance. However, the antibiotic resistance of milk bacteria from healthy donors is still vague in Taiwan. For this purpose, human milk samples were obtained from randomly recruited 19 healthy women between 3 and 360 days post-partum. Antibiotic susceptibility profile of bacteria from milk samples was determined. About 20 bacterial species were isolated from milk samples including Staphylococcus (6 species), Streptococcus (4 species), Enterococcus (2 species), Lactobacillus (1 species), and bacteria belonging to other genera (7 species). Some opportunistic or potentially pathogenic bacteria including Kluyvera ascorbata, Klebsiella oxytoca, Klebsiella pneumoniae, Acinetobacter baumannii, Actinomyces bovis, and Staphylococcus aureus were also isolated. Intriguingly, Staphylococcus isolates (22 strains) were resistant to 2-8 of 8 antibiotics, while Streptococcus isolates (3 strains) were resistant to 3-7 of 9 antibiotics, and members of the genus Enterococcus (5 strains) were resistant to 3-8 of 9 antibiotics. Notably, Staphylococcus lugdunensis, S. aureus, Streptococcus parasanguinis, Streptococcus pneumonia, and Enterococcus faecalis were resistant to vancomycin, which is considered as the last-resort antibiotic. Therefore, this study shows that most bacterial strains in human milk demonstrate mild to strong antibiotic resistance. Whether commensal bacteria in milk could serve as vehicles of antibiotic resistance should be further investigated.
    Current Microbiology 10/2015; DOI:10.1007/s00284-015-0925-4

  • Current Microbiology 10/2015;
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    ABSTRACT: Yeasts colonizing the Antarctic region are exposed to a high ultraviolet radiation evolving mechanisms to minimize the UV radiation damages, such as the production of UV-absorbing or antioxidant compounds like carotenoid pigments and mycosporines. Ergosterol has also been suggested to play a role in this response. These compounds are also economically attractive for several industries such as pharmaceutical and food, leading to a continuous search for biological sources of them. In this work, the UV-C radiation tolerance of yeast species isolated from the sub-Antarctic region and their production of carotenoids, mycosporines, and ergosterol were evaluated. Dioszegia sp., Leuconeurospora sp. (T27Cd2), Rhodotorula laryngis, Rhodotorula mucilaginosa, and Cryptococcus gastricus showed the highest UV-C radiation tolerance. The yeasts with the highest content of carotenoids were Dioszegia sp. (OHK torulene), Rh. laryngis (torulene and lycopene), Rh. mucilaginosa, (torulene, gamma carotene, and lycopene), and Cr. gastricus (2-gamma carotene). Probable mycosporine molecules and biosynthesis intermediates were found in Rh. laryngis, Dioszegia sp., Mrakia sp., Le. creatinivora, and Leuconeurospora sp. (T27Cd2). Ergosterol was the only sterol detected in all yeasts, and M. robertii and Le. creatinivora showed amounts higher than 4 mg g(-1). Although there was not a well-defined relation between UV-C tolerance and the production of these three kinds of compounds, the majority of the yeasts with lower amounts of carotenoids showed lower UV-C tolerance. Dioszegia sp., M. robertii, and Le. creatinivora were the greatest producers of carotenoids, ergosterol, and mycosporines, respectively, representing good candidates for future studies intended to increase their production for large-scale applications.
    Current Microbiology 10/2015; DOI:10.1007/s00284-015-0928-1
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    ABSTRACT: A novel bacterial strain, designated as CF21(T), was isolated from the air of Ailuropoda melanoleuca enclosures in China. Cells were gram-negative, aerobic, non-motile, and rod shaped. Strain CF21(T) grew at 10-40 °C (optimum 28-30 °C) and pH 6.0-9.0 (optimum pH 7.0-8.0) and in the presence of NaCl concentrations ranging from 0.0 % (w/v) to 2.0 % (optimum 0.0-1.0 %). 16SrRNA gene sequence analysis indicated that strain CF21(T) belonged to genus Lysobacter within class Gammaproteobacteria and was most closely related to Luteimonas dalianensi OB44-3(T) (95.8 % similarity), Lysobacter ruishenii CTN-1(T) (95.1 %), Lysobacter spongiicola KMM329(T) (94.8 %), and Lysobacter daejeonensis GH1-9(T) (94.6 %). The genomic G+C DNA content was 68.72 mol%. Major cellular fatty acids of CF21(T) were iso-C16:0 (30.22 %), iso-C15:0 (25.70 %), and the sum of 10-methyl C16 : 0 and/or iso-C17 : 1ω9c (21.94 %). The prominent isoprenoid quinone was ubiquinone 8 (Q-8). Primary polar lipids included diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, and an unknown phospholipid. DNA sequence relatedness between strain CF21(T) and L. ruishenii CTN-1(T) was 56 %, which was clearly below the 70 % threshold for prokaryotic species delineation. These analyses indicated that CF21(T) is a novel member of genus Lysobacter, for which the name Lysobacter chengduensis sp. nov. is proposed. The type strain is CF21(T) (=CGMCC1.15145(T) = DSM 100306(T)).
    Current Microbiology 10/2015; DOI:10.1007/s00284-015-0921-8
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    ABSTRACT: We isolated and purified a novel virulent Pseudoalteromonas bacteriophage PHq0 and the host bacterium Pseudoalteromonas BQ0 from seawater collected in a coastal area of the Yellow Sea of China. (36°06'N, 120°32'E). Transmission electron microscopy revealed that the phage had an icosahedral head of 50 nm in diameter with a long tail of 100 nm. The one-step growth curve showed the latent period of about 15 min, a rise period of 15 min, and a burst size of about 363 virions. The genome of phage PHq0 was found to consist of a linear, double-stranded 33,399-bp DNA molecule with a GC content of 40.29 % and 56 putative open reading frames (ORFs). Among these genes, 23 conserved domains were detected by BLASTP, 17 were functionally known, leaving 39 unknown putative genes, BLASTP results show that 57.14 % of the 56 predicted ORFs were not found to have any matches of putative functions or conserved domains in the BLASTP database which should be classified as a new member of the Siphoviridae family. The phage PHq0 genome adds a new Siphoviridae-family phage genome for marine bacteriophages which will provide useful basic information for further molecular research on interaction mechanism between bacteriophages and their hosts.
    Current Microbiology 10/2015; DOI:10.1007/s00284-015-0919-2
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    ABSTRACT: Purpose of this study was to detect microbial resistances to a set of antibiotics/pesticides (multi-resistance) within pesticide and antibiotic contaminated alluvial soils and to identify the corresonding antibiotic resistance genes (ARGs). To assess whether identified multi-resistant isolates are able to construct biofilms, serveral biofilm formation and conjugation experiements were conducted. Out of 35 isolates, six strains were used for filter mating experiments. Nine strains were identified by 16S rDNA gene sequence analyses and those were closely related to Pseudomonas sp., Citrobacter sp., Acinetobacter sp., Enterobacter sp. and in addition Bacillus cereus was chosen for multi-resistant and pesticide tolerant studies. Antibiotic resistant and pesticide tolerant bacterial strains were tested for the presence of ARGs. All nine strains were containing multiple ARGs (ampC, ermB, ermD, ermG, mecA, tetM) in different combinations. Interestingly, only strain WR34 (Bacillus cereus) exhibited a high biofilm forming capacity on glass beads. Results obtained by filter mating experiments demonstrated gene transfer frequencies from 10-5 to 10-8. This study provides evidence that alluvial soils are hot spots for the accumulation of antibiotics, pesticides and biofilm formation. Particularly high resistances to tetracycline, ampicillin, amoxicillin, and methicillin were proved. Apparently isolate WR34 strongly correlated to a pathogenic organism had high potential to deploy biofilms in alluvial soils. Thus, we assume that loosened and unconsolidated soils investigated pose a high risk of an enhanced ARG prevalence.
    Current Microbiology 10/2015;
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    ABSTRACT: Bacteriophage genomes contain an abundance of genes that code for hypothetical proteins with either a conserved domain or no predicted function. The Caulobacter phage CbK has an unusual shape, designated morphotype B3 that consists of an elongated cylindrical head and a long flexible tail. To identify CbK proteins associated with the phage particle, intact phage particles were subjected to SDS-PAGE, and the resulting protein bands were digested with trypsin and analyzed using MALDI mass spectroscopy to provide peptide molecular weights. These peptide molecular weights were then compared with the peptides that would be generated from the predicted amino acid sequences that are coded by the CbK genome, and the comparison of the actual and predicted peptide masses resulted in the identification of single genes that could code for the set of peptides derived from each of the 20 phage proteins. We also found that CsCl density gradient centrifugation resulted in the separation of empty phage heads, phage heads containing material organized in a spiral, isolated phage tails, and other particulate material from the intact phage particles. This additional material proved to be a good source of additional phage proteins, and preliminary results suggest that it may include a CbK DNA replication complex.
    Current Microbiology 10/2015; DOI:10.1007/s00284-015-0922-7
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    ABSTRACT: The microbiota in solar salterns plays an important role in salt production quantitatively and qualitatively. Bohai Bay coast is the major sea salt producing area in China. However, few ecological characterization studies of the Bohai Bay salt ponds, particularly of their microbial diversity, have been conducted. This study investigated the structure and diversity of the bacterial community in Hangu saltworks in response to environmental factors. The brine water was sampled from five selected saltponds within a salinity range of 5.0-19.3 % in May, July, and October, 2012. Phylogenetic analysis based on the denaturing gradient gel electrophoresis (DGGE) patterns of the PCR-amplified 16S rRNA gene fragment showed that, rather than pond salinity, especially the month of sampling influenced the structure of the bacterial community in the saltponds, which may be related to the water temperature or other factors fluctuating over the months. Moreover, canonical correspondence analysis of biological and physico-chemical parameters indicated that especially other environmental factors such as nitrogenous and phosphorous nutrient contents and pH structured the microbial community. The relatively high range-weighted richness index and Shannon-Wiener index (H') observed in this study reflect the high level of richness and biodiversity present, though there were substantial fluctuations over the months and salinities of sampling. The fragment of 16S rRNA gene sequence recovered from DGGE bands indicated that the bacterial assemblage in Hangu Saltworks was dominated by members of γ-Proteobacteria (34 % of total sequences obtained), followed by Firmicutes (14 %) and Bacteroidetes (9 %).
    Current Microbiology 10/2015; DOI:10.1007/s00284-015-0916-5
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    ABSTRACT: The paper presents first description of class 1 integron in an environmental strain of Rahnella aquatilis, a rarely isolated Gram-negative bacterium of the family Enterobacteriaceae. The strain was isolated from the Warta river water, Poland. Class 1 integrase gene was detected by a PCR assay. Sequencing of the integron's variable region showed the presence of a dfrA1-aadA1 gene cassette array. The integron was located in a 54-kbp plasmid that was transferable to Escherichia coli J-53 recipient strain in a conjugation assay. The integron-bearing R. aquatilis strain was resistant to aminoglycosides, penicillins, trimethoprim, sulfamethoxazole, and trimethoprim/sulfamethoxazole. This paper confirms that water environment play a major role in the spread of integrons and, consequently, antimicrobial resistance, among bacteria of various genera.
    Current Microbiology 10/2015; DOI:10.1007/s00284-015-0917-4