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Letters in Applied Microbiology

Cover image for Vol. 56 Issue 1

January 2013

Volume 56, Issue 1

Pages 1–82

  1. Original Articles

    1. Top of page
    2. Original Articles
    3. Note to the Editor
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      Occurrence and distribution of Naegleria species from thermal spring environments in Taiwan (pages 1–7)

      P.-M. Kao, M.-C. Tung, B.-M. Hsu, C.-J. Hsueh, Y.-C. Chiu, N.-H. Chen, S.-M. Shen and Y.-L. Huang

      Article first published online: 2 NOV 2012 | DOI: 10.1111/lam.12006

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      Significance and Impact of Study: In this study, we examined the presence of living Naegleria spp. in thermal spring waters in south-eastern Taiwan. Naegleria spp. was isolated and culture-confirmed from thermal spring water. Naegleria fowleri was not found in all water samples, and Naegleria australiensis was the most common Naegleria genotype.

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      A multiplex RT-PCR for rapid and simultaneous detection of viruses and viroids in chrysanthemum (pages 8–13)

      A. Song, Y. You, F. Chen, P. Li, J. Jiang and S. Chen

      Article first published online: 2 NOV 2012 | DOI: 10.1111/lam.12007

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      Significance and Impact of Study: The multiplex RT-PCR assay described in this study is the first report of simultaneous detection of virus and viroid in chrysanthemum, which provides a fast, convenient, cost-saving way to detect the virus and viroid mixed infections in plants.

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      Antimicrobial efficacy of 0·05% cetylpyridinium chloride mouthrinses (pages 14–20)

      P.K. Sreenivasan, V.I. Haraszthy and J.J. Zambon

      Article first published online: 2 NOV 2012 | DOI: 10.1111/lam.12008

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      Significance and Impact of Study: These in vitro and ex-vivo studies provide a biological rationale for previous clinical studies demonstrating the efficacy of CPC mouthrinses in reducing supragingival plaque and plaque-associated gingivitis.

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      Characterization of maltotriose transporters from the Saccharomyces eubayanus subgenome of the hybrid Saccharomyces pastorianus lager brewing yeast strain Weihenstephan 34/70 (pages 21–29)

      F.E.M. Cousseau, S.L. Alves Jr, D. Trichez and B.U. Stambuk

      Article first published online: 21 NOV 2012 | DOI: 10.1111/lam.12011

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      Significance and Impact of the Study:The Saccharomyces pastorianus lager yeast usually ferments maltose and maltotriose efficiently, and transport of these α-glucosides into the brewer's yeast cell is thought to be rate limiting in the fermentation of these sugars from wort. Our results revealed a new maltotriose transporter gene in the Saccharomyces eubayanus subgenome of the industrial lager brewing strain Weihenstephan 34/70 that allows efficient maltotriose fermentation by yeast cells. The characterization of maltotriose transporters from industrial yeasts opens new opportunities to increase yeast fitness for fermentation of brewer's wort, preventing incomplete or sluggish maltotriose fermentations.

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      Changes in microbial contamination levels and prevalence of foodborne pathogens in alfalfa (Medicago sativa) and rapeseed (Brassica napus) during sprout production in manufacturing plants (pages 30–36)

      S.A. Kim, O.M. Kim and M.S. Rhee

      Article first published online: 2 NOV 2012 | DOI: 10.1111/lam.12009

      Significance and Impact of Study: The present study investigated the levels of microbial contamination present in alfalfa and rapeseed sprouts by examining the samples taken at different stages of the manufacturing process in three actual plants. The results provide detailed information regarding the levels of seed and sprout contamination during production. The results may be useful to those involved in the sprout industry and/or academic research in terms of developing hygienic control measures, efficient intervention methods and appropriate guidelines.

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      Use of Moroccan medicinal plant extracts as botanical fungicide against citrus blue mould (pages 37–43)

      L. Askarne, I. Talibi, H. Boubaker, E.H. Boudyach, F. Msanda, B. Saadi and A. Ait Ben Aoumar

      Article first published online: 15 NOV 2012 | DOI: 10.1111/lam.12012

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      Significance and Impact of the Study: This study demonstrates that plant extracts have a high potential to control blue mould of citrus and will provide a starting point for discovering new compounds with better activity than chemical fungicides currently available. Such natural products therefore represent a sustainable alternative to the use of chemical fungicides.

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      Postprocessing microflora of commercial attieke (a fermented cassava product) produced in the south of Côte d'Ivoire (pages 44–50)

      A.K. Kouamé, T.N. Djéni, F.K. N'Guessan and M.K. Dje

      Article first published online: 15 NOV 2012 | DOI: 10.1111/lam.12014

      Significance and Impact of Study: This study demonstrates the great need to carry out microbiological tests frequently on attieke and even more the need to apply correct HACCP system during the production. Attieke is especially a well-known product in West Africa; hence, it is extremely important to ensure an adequate microbiological quality to guarantee consumers health. Overall, the study highlighted the need for effective communication on microbiological food risks, proper instruction and supervision in food-handling procedures, greater education on food safety risks.

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      Evaluation of the host specificity of Bacteroides thetaiotaomicron alpha-1-6, mannanase gene as a sewage marker (pages 51–56)

      A. Aslan and J.B. Rose

      Article first published online: 15 NOV 2012 | DOI: 10.1111/lam.12013

      Significance and Impact of Study: This is the first study that compares Bacteroides thetaiotaomicron alpha-1-6, mannanase marker with other markers. Our study showed that this marker has strong potential to be used as an indicator for sewage pollution in water.

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      Sequential interactions of silver–silica nanocomposite (AgSiO2NC) with cell wall, metabolism and genetic stability of Pseudomonas aeruginosa, a multiple antibiotic-resistant bacterium (pages 57–62)

      A. Anas, J. Jiya, M.J. Rameez, P.B. Anand, M.R. Anantharaman and S. Nair

      Article first published online: 19 NOV 2012 | DOI: 10.1111/lam.12015

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      Significance and Impact of Study: Although the synthesis, structural characteristics and biofunction of silver nanoparticles are well understood, their application in antimicrobial therapy is still at its infancy as only a small number of microorganisms are tested to be sensitive to nanoparticles. A thorough knowledge of the mode of interaction of nanoparticles with bacteria at subcellular level is mandatory for any clinical application. The present study deals with the interactions of Ag–SiO2NC with the cell wall integrity, metabolism and genetic stability of Pseudomonas aeruginosa, which would contribute substantially in strengthening the therapeutic applications of silver nanoparticles.

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      Effect of media composition, including gelling agents, on isolation of previously uncultured rumen bacteria (pages 63–70)

      T. Nyonyo, T. Shinkai, A. Tajima and M. Mitsumori

      Article first published online: 21 NOV 2012 | DOI: 10.1111/lam.12019

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      Significance and Impact of the Study:The results of this study demonstrated that modification of media composition, including gelling agents and concentrations of phosphate and magnesium, affected diversities of isolates, which were previously uncultured but were reported as phylotypes from the rumen.

      Corrected by:

      Corrigendum: CORRIGENDUM

      Vol. 56, Issue 5, 387–388, Article first published online: 8 JAN 2013

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      Characteristics of lactic acid bacteria isolates and their inoculating effects on the silage fermentation at high temperature (pages 71–78)

      M.M. Chen, Q.H. Liu, G.R. Xin and J.G. Zhang

      Article first published online: 21 NOV 2012 | DOI: 10.1111/lam.12018

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      Significance and Impact of the Study: Grasses are often difficult to ensile in the tropics and subtropics because of the high temperatures there. To solve this problem, we screened for thermotolerant lactic acid bacteria and obtained two valuable strains of Lactobacillus rhamnosus, HT1 and HT2, which proved to be beneficial to silage fermentation at high temperatures. Lactobacillus rhamnosus HT1 and HT2 can be used as inoculants for silage making in the tropics and subtropics, and will play an important role in developing silage production in such regions.

  2. Note to the Editor

    1. Top of page
    2. Original Articles
    3. Note to the Editor
    1. You have free access to this content
      An assay to screen bacterial adhesion to mucus biomolecules (pages 79–82)

      A. Tkachenko, L. Da Silva, J. Hearne, S. Parveen and Y. Waguespack

      Article first published online: 7 NOV 2012 | DOI: 10.1111/lam.12003

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      Significance and Impact of the Study: The assay can be used as an initial approach in a systematic identification of mucus constituent(s) exhibiting the most favourable adhesion properties for bacteria.

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