371 results match your criteria Biocontrol Science[Journal]


Low-concentration Sorbic Acid Promotes the Induction of Escherichia coli into a Viable but Nonculturable State.

Biocontrol Sci 2019 ;24(1):67-71

Faculty of Applied Bioscience, Kanagawa Institute of Technology.

 The effect of food preservatives and sanitizers at low concentrations on the induction of Escherichia coli into a viable but nonculturable (VBNC) state was investigated. When E. coli was incubated in physiological saline at 37℃, the viable cell count measured by plate counting was approximately 3-logs lower than that measured by flow cytometry after 30 days. Read More

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http://dx.doi.org/10.4265/bio.24.67DOI Listing
January 2019

Construction of Its Evaluation System in Originally Designed Test-Chamber System and Sporicidal Activity of Aerosolized Hypochlorite Solution to Bacillus subtilis Spores.

Biocontrol Sci 2019 ;24(1):57-65

Engineering Division, Kajima Corporation.

 Effective spatial disinfection systems are required for human health care, public hygiene, and food and medicine manufacturing. Although some aerosolized disinfectants were already applied to its purpose, accurate evaluation systems were under constructed. In this study, the spatial sporicidal activity of aerosolized hypochlorite solution (AHS) to dormant cells, Bacillus subtilis spores, was evaluated by an originally designed chamber system. Read More

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http://dx.doi.org/10.4265/bio.24.57DOI Listing
January 2019

Solid-liquid Interface Screening SystemーApplication to the Screening of Antibiotic and Cytotoxic Substance-producing Fungi.

Biocontrol Sci 2019 ;24(1):47-56

Department of Life Science and Biotechnology, National Institute of Advanced Industrial Science andTechnology (AIST).

 A useful tool for the screening of fungi producing biologically active secondary metabolites such as antibiotics and cytotoxic substances has been developed. An agar plate-organic solvent interface cultivation (A/S-IFC) system, which comprised a hydrophobic organic solvent (upper phase) , a fungal mat (middle phase) and an agar plate (lower phase) , was constructed. The metabolite profiles were compared among the A/S-IFC, a traditional submerged cultivation (SmC) and an extractive liquid surface immobilization (Ext-LSI) system consisted of a hydrophobic solvent (upper phase) , a fungal cells-ballooned microspheres (middle phase) and a liquid medium (lower phase) , with high-performance liquid chromatography-photodiode array detector (HPLC-PDA) . Read More

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http://dx.doi.org/10.4265/bio.24.47DOI Listing
January 2019
1 Read

Phylogenetic Characterization of Viable but-not-yet Cultured Legionella Groups Grown in Amoebic Cocultures: A Case Study using Various Cooling Tower Water Samples.

Biocontrol Sci 2019 ;24(1):39-45

Ibaraki University College of Agriculture.

 Legionella spp. exist naturally in association with amoeba in water environments and are known to be the etiological agent of a severe form of pneumonia. To detect diverse Legionella populations in cooling tower water systems, amoebic coculturing was performed for 15 water samples obtained from five different kinds of facilities in six geographically different locations. Read More

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http://dx.doi.org/10.4265/bio.24.39DOI Listing
January 2019

Rapid Single Cell Detection of Lactic Acid Bacteria in the Beer Using Bioluminescence Method.

Biocontrol Sci 2019 ;24(1):29-37

Group R&D Strategy Department, SAPPORO HOLDINGS LTD.

 In this study, we developed a system, known as MicroStar Rapid Microbe Detection System (RMDS) , to detect Lactobacillus brevis, which usually requires 2-4 days for examination by the conventional plate count procedure, for beer quality control using a bioluminescence method within 24 hr and also aimed to develop a technology to detect bacterial growth without the need for cultivation. We used a highly sensitive luminous reagent that increased the activity of the luciferin- luciferase reaction to 2.5×10 mol ATP/0. Read More

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https://www.jstage.jst.go.jp/article/bio/24/1/24_29/_article
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http://dx.doi.org/10.4265/bio.24.29DOI Listing
January 2019
7 Reads

Selection of Phages to Control Aeromonas hydrophila - An Infectious Agent in Striped Catfish.

Biocontrol Sci 2019 ;24(1):23-28

3Department of Aquatic Pathology, College of Aquaculture and Fisheries, Can Tho University.

Striped catfish (Pangasianodon hypophthalmus) farming in the Mekong Delta Vietnam (MKDVN) importantly contributes to national aquaculture export. Currently, however, diseases occur more frequently across the entire MKDVN region. One of the most common types is hemorrhagic septicemia caused by Aeromonas hydrophila. Read More

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http://dx.doi.org/10.4265/bio.24.23DOI Listing
January 2019

Susceptibility of Oral Streptococci to Chlorhexidine and Cetylpyridinium Chloride.

Biocontrol Sci 2019 ;24(1):13-21

Department of Oral Microbiology, College of Dentistry, Research Institute of Oral Science, Gangneung-Wonju National University.

Although the most common bacteria in the supragingival plaque are Gram-positive streptococci, no extensive investigations have been conducted into the susceptibility of these species to chlorhexidine and cetylpyridinium chloride. Therefore, in this study, we investigated the susceptibility of 80 streptococcal strains in planktonic or biofilm states to these two antimicrobial agents. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of the planktonic streptococci were measured using the microdilution method, as were the minimum biofilm inhibitory concentration (MBIC) and minimum biofilm eradication concentration (MBEC) measured on streptococcal biofilms formed on 96-well plates. Read More

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http://dx.doi.org/10.4265/bio.24.13DOI Listing
January 2019

Identification, Growth Profile and Probiotic Properties of Autochthonous Intestinal Bacteria of Sagor catfish (Hexanematichthys sagor).

Biocontrol Sci 2019 ;24(1):1-11

Microbiology and Fish Disease Laboratory, Borneo Marine Research Institute, University Malaysia Sabah.

 The prevalence of antibiotic resistant bacteria in aquaculture has reached alarming proportions and intensified the search for microbe derived antimicrobial compounds. This study isolated bacteria from the intestine of Sagor catfish (Hexanematichthys sagor) and screened it for antagonistic properties. Five out of 334 bacterial isolates inhibited growth of fish pathogens. Read More

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http://dx.doi.org/10.4265/bio.24.1DOI Listing
January 2019

Effects of Fragrance Ingredients on the Uptake of Legionella pneumophila into Acanthamoeba castellanii.

Biocontrol Sci 2018 ;23(4):241-244

Department of Microbiology, School of Pharmaceutical Sciences, Josai University.

Acanthamoeba castellanii, a ubiquitous organism in water environments, is pathogenic toward humans and also is a host for bacteria of the genus Legionella, a causative agent of legionellosis. Fragrance ingredients were investigated for their antibacterial activity against planktonic Legionella pneumophila, amoebicidal activity against A. castellanii, and inhibitory effect against L. Read More

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http://dx.doi.org/10.4265/bio.23.241DOI Listing
April 2019
3 Reads

Evaluation of the Novel Dry Sheet Culture Method for the Enumeration of Enterobacteriaceae.

Biocontrol Sci 2018 ;23(4):235-240

Yokohama Research Center, JNC Corporation.

MC-Media Pad EB (MMP-EB) , a novel sheet culture method for the enumeration of Enterobacteriaceae, has been evaluated. When both inclusivity and exclusivity of MMP-EB were assessed using 104 microbes including 51 Enterobacteriaceae strains, all tested Enterobacteriaceae strains grew and formed obvious red-colored colonies and all tested non-Enterobacteriaceae strains were shown different appearance from Enterobacteriaceae strains. For the comparison study of the method, MMP-EB was compared with violet red bile glucose agar (VRBG) according to ISO 21528-2:2017 and Petrifilm Enterobacteriaceae Count Plate (Petrifilm EB) method using 100 naturally contaminated food samples. Read More

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https://www.jstage.jst.go.jp/article/bio/23/4/23_235/_articl
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http://dx.doi.org/10.4265/bio.23.235DOI Listing
April 2019
15 Reads

Evaluation of a Novel Chromogenic Selective Medium for the Improved Detection of Campylobacter from Stool Samples.

Biocontrol Sci 2018 ;23(4):229-234

BML Inc.

BD mCCDA Clear-HT (CCHT; Nippon Becton Dickinson Company, Ltd.) , a novel chromogenic selective medium was evaluated for its superior capacity to isolate Campylobacter jejuni/ coli. When CCHT was assessed using 142 microbes including 42 Campylobacter jejuni/ coli strains, all Campylobacter strains were found to form purple-colored colonies on CCHT whereas all the other microbes failed to grow. Read More

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http://dx.doi.org/10.4265/bio.23.229DOI Listing

Application of Potassium Myristate as an Antifungal and a Dough Improving in Bread-Making.

Biocontrol Sci 2018 ;23(4):223-227

Faculty of Environmental Engineering, University of Kitakyushu.

Surface-acting agents are used as bread improvers in bread making to increase the specific loaf volume. We focused on the use of fatty acid salts as surface acting agents and new food additives. Fatty acid salts are the main components of soaps and display antibacterial activity. Read More

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http://dx.doi.org/10.4265/bio.23.223DOI Listing

Effectiveness of Airborne Fungi Removal by using a HEPA Air Purifier Fan in Houses.

Biocontrol Sci 2018 ;23(4):215-221

Laboratory of Integrated Pest Management, FCG Research Institute, Inc.

Few studies have evaluated the performance of air purifiers in removing airborne fungi in houses. Here, we evaluated the ability of a HEPA air purifier fan to remove airborne fungi in six houses in Japan. In each house, the number of airborne fungi decreased more rapidly when the air purifier fan was on (test measurement) than when it was off (control) , demonstrating its ability to decrease the fungal concentration. Read More

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https://www.jstage.jst.go.jp/article/bio/23/4/23_215/_articl
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http://dx.doi.org/10.4265/bio.23.215DOI Listing
April 2019
8 Reads

Characteristics of Staphylococcal Enterotoxin A Production and Growth of Staphylococcus aureus in Shaking and Stationary Cultures.

Biocontrol Sci 2018 ;23(4):207-214

Laboratory of Veterinary Public Health, Faculty of Agriculture, Tokyo University of Agriculture and technology.

Staphylococcal food poisoning, which is still a serious health problem worldwide, is caused by staphylococcal enterotoxin (SE) . Among many types of SE, staphylococcal enterotoxin type A (SEA) is known to be the most responsible for staphylococcal food poisoning. Production by SEA-producing strains in shaking culture has been studied by many investigators, whereas the kinetical differences between shaking and stationary cultures have not been studied intensively. Read More

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http://dx.doi.org/10.4265/bio.23.207DOI Listing

Viability of Chlorine-injured Escherichia Coli O157:H7 on Fresh-cut Cabbage during Cold Storage in High CO Atmospheres.

Biocontrol Sci 2018 ;23(4):199-206

Faculty of Biology-Oriented Science and Technology, Kindai University.

Viability of chlorine-injured E. coli O157:H7 inoculated onto shredded cabbage was evaluated during storage in air or high CO controlled atmospheres (CA) of 5%, 10%, and 15% at 10℃ and in a modified atmosphere packaging (MAP) at 5℃ and 10℃. When shredded cabbage was inoculated with chlorine-injured E. Read More

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http://dx.doi.org/10.4265/bio.23.199DOI Listing

Molecular and Biological Differences Among Ochroconis Strains Collected from Indoor and Outdoor Environments.

Biocontrol Sci 2018 ;23(4):187-198

Department of Microbiology, Osaka Institute of Public Health.

The molecular, morphological, and physiological characters of 55 Ochroconis strains collected from indoor and outdoor environments were studied. In Japan, Ochroconis species are often found in indoor detergent-rich environments, such as bathrooms and washing machines, and the predominant species have been identified as O. humicola, similar to that in other Asian and European countries. Read More

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http://dx.doi.org/10.4265/bio.23.187DOI Listing

Fungicidal Effects of Ultraviolet Light (254 nm) Irradiation on Contaminated Museum Packing and Storing Materials.

Biocontrol Sci 2018 ;23(4):177-186

Graduate School of Conservation and Cultural Properties, Tokyo University of the Art.

In storage of modern museums, collections are packed and stored with acid-free paper-based materials for keeping safe and stable conditions. Direct contact of fungal contaminated packing and storing materials with the collections is concerned about expanding of infection in storage facilities. In this study, fungicidal effects of UV light irradiation on the materials such as archival board and Japanese tissue paper contaminated with Penicilliun commune and Chaetomium globosum were tested. Read More

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https://www.jstage.jst.go.jp/article/bio/23/4/23_177/_articl
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http://dx.doi.org/10.4265/bio.23.177DOI Listing
April 2019
1 Read

Influence of Gas Temperature in Atmospheric Non-Equilibrium Plasma on Bactericidal Effect.

Biocontrol Sci 2018 ;23(4):167-175

FIRST, Tokyo Institute of Technology.

In this study, the relationship between plasma gas temperature and the bactericidal effects on five of bacteria (Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Enterococcus faecalis and Bacillus cereus (spore)) in liquid was investigated using a temperature-controllable plasma source. We determined that the bactericidal ability improved as the plasma gas temperature increased. Specifically, the bactericidal ability on E. Read More

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http://dx.doi.org/10.4265/bio.23.167DOI Listing

Sorbitol Minimizes Calcium Carbonate Scale Generation While Maintaining the Disinfection Effect of Heated Scallop-Shell Powder for Fresh Produce.

Biocontrol Sci 2018 ;23(4):157-165

Faculty of Applied Bioscience, Kanagawa Institute of Technology.

Scallop shells subjected to heat treatment exhibit antimicrobial activity, and heated scallop-shell powder (HSSP) has recently been reported to be effective for disinfecting food. However, because the main component of these shells is calcium oxide, there is a problem that scales of calcium carbonate (CaCO) become established on the surface of equipment used for food processing. In this study, we thus investigated whether the addition of sugar to HSSP slurry suppressed CaCO scale generation and whether the sugar-supplemented HSSP could be applied to the disinfection and preservation of fresh lettuce. Read More

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http://dx.doi.org/10.4265/bio.23.157DOI Listing

Antibacterial Properties of Silicone Membranes after a Simple Two-Step Immersion Process in Iodine and Silver Nitrate Solutions.

Biocontrol Sci 2018 ;23(3):97-105

Faculty of Applied Bioscience, Kanagawa Institute of Technology.

 Silicone is widely used in packing materials, medical equipment, and separation membranes. Since microbial cells easily adhere to the surface of silicone materials and form biofilms, techniques for incorporating antimicrobial activity into silicone materials are in high demand. This study describes the preparation of silver (Ag)/silicone composite membranes through a simple two-step immersion process, utilizing an iodine solution followed by a silver nitrate solution at room temperature. Read More

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http://dx.doi.org/10.4265/bio.23.97DOI Listing
December 2018

Control of Aliivibrio fischeri Luminescence and Decrease in Bioluminescence by Fungicides.

Biocontrol Sci 2018 ;23(3):85-96

Faculty of Environment Engineering, University of Kitakyushu.

Studies have reported that cell density, ultraviolet (UV) irradiation, and redox reactions, can induce bioluminescence in bacteria. Conversely, the relationship between seawater components and luminescence is not well understood. The efficacy of marine luminous bacteria as biosensors, and their reactivity to fungicides (for example postharvest pesticides) are also unknown. Read More

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http://dx.doi.org/10.4265/bio.23.85DOI Listing
December 2018
23 Reads

Discovery of Terbinafine Low Susceptibility Trichophyton rubrum strain in Japan.

Biocontrol Sci 2018 ;23(3):151-154

Graduate School of Health Care Science, Bunkyo Gakuin University.

This is the first confirmed report of terbinafine low susceptibility Trichophyton rubrum, BGUTR13, in Japan collected from the whole sole of the elderly over 65s with cotton swab sampling method at the special nursing care-home in 2016. We revealed BGUTR13 showed low susceptibility (MIC, >128 μg/mL) against terbinafine. But, BGUTR13 exhibited normal susceptibility to itraconazole, did not showed cross-resistance. Read More

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http://dx.doi.org/10.4265/bio.23.151DOI Listing
December 2018
1 Read

Eligibility of Feline Calicivirus for a Surrogate of Human Norovirus in Comparison with Murine Norovirus, Poliovirus and Coxsackievirus.

Biocontrol Sci 2018 ;23(3):145-149

Department of Virology, Graduate School of Biomedical and Health Sciences, Hiroshima University.

Feline calicivirus (FCV) is frequently used as a surrogate of human norovirus. We investigated eligibility of FCV for anti-viral assay by investigating the stability of infectivity and pH sensitivity in comparison with other viruses. We found that infectivities of FCV and murine norovirus (MNV) are relatively unstable in infected cells compared with those of coxsackievirus (CoV) and poliovirus (PoV) , suggesting that FCV and MNV have vulnerability. Read More

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http://dx.doi.org/10.4265/bio.23.145DOI Listing
December 2018
5 Reads

Behavior of Nitrate-Nitrogen and Nitrite-Nitrogen in Drinking Water.

Biocontrol Sci 2018 ;23(3):139-143

Department of Oral and Maxillofacial Surgery, National Defense Medical College.

Nitrate-nitrogen (NO-N) and nitrite-nitrogen (NO-N) are constituents of the nitrogen cycle. NO-N is toxic to humans, primarily due to its reduction to NO-N. In Japan, NO-N and NO-N levels in tap water must not exceed 10 mg/L and only NO-N alone not 0. Read More

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http://dx.doi.org/10.4265/bio.23.139DOI Listing
December 2018

Thermotolerant Yeast Kluyveromyces marxianus Reveals More Tolerance to Heat Shock than the Brewery Yeast Saccharomyces cerevisiae.

Biocontrol Sci 2018 ;23(3):133-138

Division of Applied Life Science, Graduate School of Applied and Environmental Sciences, Osaka Prefecture University.

The thermotolerant yeast Kluyveromyces marxianus, growing at high temperature (45℃) , showed stronger survival under heat shock at 50℃ than the brewing yeast Saccharomyces cerevisiae, which was unable to grow at 45℃. The survival rate of K. marxianus decreased to 10% during heat shock at 50℃ for 20 min, and to less than 0. Read More

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http://dx.doi.org/10.4265/bio.23.133DOI Listing
December 2018
20 Reads

Antibacterial Activity of Epoxy Resins Mixed with Polyelectrolyte/Silver Nanoparticle Composite Filler.

Biocontrol Sci 2018 ;23(3):129-132

Department of Applied Chemistry and Chemical Engineering, National Institute of Technology Toyama College.

In this study, antibacterial polyelectrolyte/silver nanoparticle (Ag NP) composite powder was mixed with epoxy resins as fillers to impart antibacterial activity. Either an anhydride-type or a polyamideamine-type curing agent was applied to a bisphenol A-type base compound to prepare the epoxy resins. Antibacterial assays of these resins against Escherichia coli were performed using the shake tube technique; suppression of antibacterial activity was found for the anhydride-type resin, although the polyamideamine-type resin did exhibit antibacterial activity. Read More

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https://www.jstage.jst.go.jp/article/bio/23/3/23_129/_articl
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http://dx.doi.org/10.4265/bio.23.129DOI Listing
December 2018
1 Read

Inhibitory Effect of Spice Powders on the Development of Heated and Irradiated Bacillus subtilis Spores as Evaluated by Calorimetry.

Biocontrol Sci 2018 ;23(3):121-128

Department of Quantum and Radiation Engineering, Graduate School of Engineering, Osaka Prefecture University.

Inhibitory effects of the powders of paprika, red pepper, black pepper, sage, oregano and thyme in a solid medium after heat treatment and gamma-irradiation on the development from spore of Bacillus subtilis were examined using calorimetry. Based on the f(t) curve (Antoce et al., 1996) from the thermogram obtained, two parameters, the growth rate constant and the growth retardation time, were used to evaluate the inhibitory effect. Read More

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http://dx.doi.org/10.4265/bio.23.121DOI Listing
December 2018

Characteristics of Biofilms Formed by Co-Culture of Listeria monocytogenes with Pseudomonas aeruginosa at Low Temperatures and Their Sensitivity to Antibacterial Substances.

Biocontrol Sci 2018 ;23(3):107-119

Faculty of Applied Bioscience, Kanagawa Institute of Technology.

We assessed the properties of biofilms (BFs) formed by mono- and co-cultures of Listeria monocytogenes and Pseudomonas aeruginosa (L+P-BF) at low temperatures and examined their sensitivity to several antibacterial substances. L. monocytogenes viable counts comprised only 1-10% of total L+P-BF viable counts at 10℃ and 15℃, indicating the significant prevalence of P. Read More

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http://dx.doi.org/10.4265/bio.23.107DOI Listing
December 2018
17 Reads

Anti-Ice Nucleation Activities of Tyrosine Peptide.

Biocontrol Sci 2018 ;23(2):81-83

Department of Life Science and Biotechnology, Kansai University.

 We investigated whether trimers of serine, threonine, tyrosine, and phenylalanine which may interact with water molecules and ice, show anti-ice nucleation activity. Only tyrosine trimer had high levels of anti-ice nucleation activity (10.10±0. Read More

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http://dx.doi.org/10.4265/bio.23.81DOI Listing
October 2018
23 Reads

Inhibitory Activity of Hydroxytyrosol against Streptolysin O-Induced Hemolysis.

Biocontrol Sci 2018 ;23(2):77-80

School of Life and Environmental Science, Azabu University.

 Group A streptococcus is a bacterium that resides in the throat and skin and causes respiratory infection and occasionally glomerulonephritis and rheumatic fever. Streptolysin O (SLO) produced by Streptococcus pyogenes (S. pyogenes) binds to the cell membrane, particularly to that of white and red blood cells, and is toxic to the cells and tissue. Read More

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http://dx.doi.org/10.4265/bio.23.77DOI Listing
October 2018
2 Reads

Stable Antimicrobial Activity Achieved via Immobilization of Quaternary Ammonium Chloride on Hair.

Biocontrol Sci 2018 ;23(2):71-76

HG.RP. HDR. Project, LG Household & Health Care.

 Dandruff and underarm malodor are caused by microorganisms. Personal hygiene products that contain various types of antimicrobial agents are available and are used for the prevention and alleviation of these conditions. However, their effects are not significant and often do not last long. Read More

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http://dx.doi.org/10.4265/bio.23.71DOI Listing
October 2018

Comparison of the Filter Efficiency of Medical Nonwoven Fabrics against Three Different Microbe Aerosols.

Biocontrol Sci 2018 ;23(2):61-69

National Institute of Infectious Diseases.

 Exact evaluation of the performance of surgical masks and biohazard protective clothing materials against pathogens is important because it can provide helpful information that healthcare workers can use to select suitable materials to reduce infection risk. Currently, to evaluate the protective performance of nonwoven fabrics used in surgical masks against viral aerosols, a non-standardized test method using phi-X174 phage aerosols is widely performed because actual respiratory viruses pose an infection risk during testing and the phage is a safe virus to humans. This method of using a phage is simply modified from a standard method for evaluation of filter performance against bacterial aerosols using Staphylococcus aureus, which is larger than virus particles. Read More

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http://dx.doi.org/10.4265/bio.23.61DOI Listing
October 2018
5 Reads

Positive Selection in F-Box Domain (lpp0233) Encoded in Legionella pneumophila Strains.

Biocontrol Sci 2018 ;23(2):53-59

Faculty of Pharmacy, Osaka Ohtani University.

 Recent studies have shown that the genome of Legionella pneumophila is characterized by many foreign genes from a variety of eukaryotes. The eukaryotic like proteins are known to play a role in its multiplication within host cells; however, their evolutionary genetics of L. pneumophila in environments is unknown. Read More

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http://dx.doi.org/10.4265/bio.23.53DOI Listing
October 2018
1 Read

Biosynthesis of Low Molecular Weight Antifungal Protein from Aspergillus giganteus in Batch Fermentation and In-Vitro Assay.

Biocontrol Sci 2018 ;23(2):41-51

School of Biochemical Engineering, Indian Institute of Technology (BHU), Varanasi (Banaras Hindu University).

 In present study, Taguchi's design of experiment L orthogonal array was created using Qualitek-4 software with four most critical factors namely, KHPO, MgSO, CaCl and culture pH. Production of a new intracellular antifungal protein in submerged fermentation was optimized with yield of 0.98±0. Read More

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http://dx.doi.org/10.4265/bio.23.41DOI Listing
October 2018
5 Reads

Advanced Analysis to Distinguish between Physical Decrease and Inactivation of Viable Phages in Aerosol by Quantitating Phage-Specific Particles.

Biocontrol Sci 2018 ;23(1):7-15

National Institute of Infectious Diseases.

 Recent studies have investigated the efficacy of air-cleaning products against pathogens in the air. A standard method to evaluate the reduction in airborne viruses caused by an air cleaner has been established using a safe bacteriophage instead of pathogenic viruses; the reduction in airborne viruses is determined by counting the number of viable airborne phages by culture, after operating the air cleaner. The reduction in the number of viable airborne phages could be because of "physical decrease" or "inactivation". Read More

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http://dx.doi.org/10.4265/bio.23.7DOI Listing
September 2018

In vitro Inhibitory Effects of Two Bornean Medicinal Wild Gingers against Pathogenic Lagenidium thermophilum Infected Mud Crab Scylla tranquebarica.

Biocontrol Sci 2018 ;23(1):35-39

Laboratory of Natural Products Chemistry, Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah.

 The antifungal activity of two Bornean medicinal wild gingers Plagiostachys megacarpa and Zingiber phillippsiae were examined against Lagenidium thermophilum. The most active extract was P. megacarpa at concentration of 320 µg/mL inhibiting both hyphal growth and zoospore production of L. Read More

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http://dx.doi.org/10.4265/bio.23.35DOI Listing
September 2018

Comparison of Chromogenic Selective Media for the Detection of Cronobacter spp. (Enterobacter sakazakii).

Biocontrol Sci 2018 ;23(1):27-33

Department of Food Bioscience and Biotechnology, College of Bioresource Science, Nihon University.

 The four types of chromogenic selective media that are commercially available in Japan were compared for establishing a Japanese standard method for detecting Cronobacter spp. based on ISO/TS 22964:2006. When assessed using 9 standard Cronobacter spp. Read More

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http://dx.doi.org/10.4265/bio.23.27DOI Listing
September 2018
2 Reads

Role of Phage Shock Protein in Recovery of Heat-injured Salmonella.

Biocontrol Sci 2018 ;23(1):17-25

Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University.

 Sublethally heat-injured cells of Salmonella in food can recover under favorable conditions, leading to foodborne illness. To elucidate the molecular mechanism of recovery from heat injury, the global changes in gene transcription of Salmonella Typhimurium were investigated in previous study. In this study, the functions of genes involved in phage shock response (viz. Read More

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http://dx.doi.org/10.4265/bio.23.17DOI Listing
September 2018

Characterization of the Axillary Microbiota of Japanese Male Subjects with Spicy and Milky Odor Types by Pyrosequencing.

Biocontrol Sci 2018 ;23(1):1-5

Department of Microbiology, Meiji Pharmaceutical University.

 Malodorants in the human axilla are produced from human biogenic precursors by axillary bacterial enzymes. In the present study, we used pyrosequencing analysis to identify the axillary bacterial microbiota of 13 Japanese male subjects with cumin-like, spicy body odor (C type), and 9 with milky, skin-based body odor (M type). Anaerococcus, Corynebacterium, and Staphylococcus predominated in both C- and M-type subjects, followed by Moraxella and Peptoniphilus. Read More

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http://dx.doi.org/10.4265/bio.23.1DOI Listing
September 2018
4 Reads

Anti-Ice Nucleation Activities of Adenine and Poly-A Nucleotides.

Biocontrol Sci 2017 ;22(4):233-237

Department of Life Science and Biotechnology, Kansai University.

 Most of the ice nucleation activity inhibitor reported so far are compounds processing the hydroxyl group such as the polyphenolic derivative. After examining the anti-ice nucleation activity of the purine base, the highest compound is theophylline, and the activity showed 3.80±0. Read More

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http://dx.doi.org/10.4265/bio.22.233DOI Listing
June 2018
23 Reads

Antibacterial Activities of Surfactants in the Laundry Detergents and Isolation of the Surfactant Resistant Aquatic Bacteria.

Biocontrol Sci 2017 ;22(4):229-232

Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University.

 Linear alkylbenzene sulfonate (LAS) and polyoxyethylene lauryl ether (POLE) are major surfactants contained in the laundry detergents. In the present study, the antibacterial activities of the surfactants to aquatic microorganisms were compared. When freshwater samples from a small river in Okayama city were treated with each of the surfactants, only LAS showed the significant antibacterial activity. Read More

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http://dx.doi.org/10.4265/bio.22.229DOI Listing

Stability of Weakly Acidic Hypochlorous Acid Solution with Microbicidal Activity.

Biocontrol Sci 2017 ;22(4):223-227

Department of Oral and Maxillofacial Surgery, National Defense Medical College.

 Hypochlorous acid (HOCl) solution (200 ppm, pH 6) was prepared and evaluated for their stabilities and microbicidal activities. We demonstrated that HOCl is unstable against ultraviolet (UV) light, sunshine, contact with air, and elevated temperature (≧25℃). Furthermore, in the HOCl solution, the presence of excess NH- or CHO-containing organic compounds such as proteins and carbohydrates, or of inorganic ions such as NO, SO, PO, Fe, Cu, and CuS, resulted in the rapid consumption of HOCl by oxidation reactions, and significantly decreased the microbicidal activity of the HOCl solution against coliform bacteria and total viable cell count. Read More

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http://dx.doi.org/10.4265/bio.22.223DOI Listing
June 2018
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Characterization and Application of Lytic Bacteriophages against Campylobacter jejuni Isolated from Poultry in Japan.

Biocontrol Sci 2017 ;22(4):213-221

Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University.

 The aim was to isolate Campylobacter jejuni-specific lytic phages from meats on the market in Japan. These phages were effectively isolated from 13 of 15 (86.7%) retail chicken meat samples (skin and liver) by the enrichment method using Preston Campylobacter Selective Enrichment Broth and 10 host Campylobacter strains. Read More

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http://dx.doi.org/10.4265/bio.22.213DOI Listing
June 2018
3 Reads

Characterization of Anti-Ice Nucleation Activity of the Extract from Coffee Refuse.

Biocontrol Sci 2017 ;22(4):205-211

Department of Life Science and Biotechnology, Kansai University.

 The supercooling-facilitating (SCF) activities, that is, the anti-ice nucleation activity of the hot water extracts from five types of processed food refuse was examined. The extract with the highest activity among five hot water extracts was coffee refuse, showing 1.50℃ of SCF activity at a final concentration of 0. Read More

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http://dx.doi.org/10.4265/bio.22.205DOI Listing
June 2018
7 Reads

Hydrocarbon Degradation and Bacterial Community Responses During Remediation of Sediment Artificially Contaminated with Heavy Oil.

Biocontrol Sci 2017 ;22(4):187-203

Education and Research Center for Marine Resources and Environment, Faculty of Fisheries, Kagoshima University.

 Natural biodegradation of heavy oil in the marine environment can be accelerated by the addition of nutrients or seeding of pre-selected microorganisms. In this study, a microcosm experiment was conducted to investigate the effects of inorganic nutrient supplementation (biostimulation) and bacterial consortium amendment (bioaugmentation) on the natural degradative processes of artificially contaminated sediment. Our results revealed that the addition of nutrients had greater effect on remediation than the addition of bacterial cells. Read More

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http://dx.doi.org/10.4265/bio.22.187DOI Listing
June 2018
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Microbioligical Hazard Contamination in Fermented Vegetables Sold in Local Markets in Cambodia.

Biocontrol Sci 2017 ;22(3):181-185

Food Research Institute, National Agriculture and Food Research Organization.

 Fermented vegetables are common part of Cambodian diet. The food safety status for these foods has not been investigated. This study was conducted to evaluate the microbiological hazards that contaminated fermented vegetables. Read More

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http://dx.doi.org/10.4265/bio.22.181DOI Listing
January 2018
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Development of a Novel Scanning Thermal Microscopy (SThM) Method to Measure the Thermal Conductivity of Biological Cells.

Biocontrol Sci 2017 ;22(3):175-180

Faculty of Pharmaceutical Sciences, Setsunan University.

 Differences in the physical properties of individual cells cannot be evaluated with conventional experimental methods that are used to study groups of cells obtained from pure cultures. To examine the differences in the thermal tolerance of individual cells that are genetically identical, a method is needed to measure the thermal energy required to kill single cells. We developed a scanning thermal microscopy (SThM) system and measured the thermal conductivity of various bacterial cells, for example, spore formeing Bacillus genus and non spore-forming bacteria such as Escherichia coli. Read More

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http://dx.doi.org/10.4265/bio.22.175DOI Listing
January 2018
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In vitro Anti-Influenza Virus Activity of Agaricus brasiliensis KA21.

Biocontrol Sci 2017 ;22(3):171-174

Department of Veterinary Medicine, Laboratory of Microbiology II, School of Veterinary Medicine, Azabu University.

 Agaricus is known to have immunostimulatory and anti-tumor effects. However, the antiviral effects of Agaricus have not yet been examined. In the present study, the antiviral effects of an extract of Agaricus brasiliensis KA21 (AE) on the H1N1 influenza virus (PR8 strain) were investigated. Read More

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http://dx.doi.org/10.4265/bio.22.171DOI Listing
January 2018
25 Reads

Rapid Discrimination between Methicillin-Sensitive and Methicillin-Resistant Staphylococcus aureus Using MALDI-TOF Mass Spectrometry.

Biocontrol Sci 2017 ;22(3):163-169

Divisions of Clinical Mass Spectrometry and Clinical Genetics, Chiba University Hospital.

 Methicillin-resistant Staphylococcus aureus (MRSA) is one of the major pathogens responsible for nosocomial infections. The presence of MRSA in a hospital is detrimental to patients and to hospital management. Thus, rapid identification of MRSA is needed. Read More

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http://dx.doi.org/10.4265/bio.22.163DOI Listing
January 2018
12 Reads

Role of fatty acid salts as anti Acanthamoeba agents for disinfecting contact lens.

Biocontrol Sci 2017 ;22(3):153-161

Faculty of Environmental Engineering, University of Kitakyushu.

 Acanthamoeba is found in seawater, fresh water, and soil and is an opportunistic pathogen that causes a potentially blinding corneal infection known as Acanthamoeba keratitis. The anti-amoeba activity of 9 fatty acid salts (potassium butyrate (C4K), caproate (C6K), caprylate (C8K), caprate (C10K), laurate (C12K), myristate (C14K), oleate (C18:1K), linoleate (C18:2K), and linolenate (C18:3K)) was tested on Acanthamoeba castellanii ATCC 30010 (trophozoites and cysts). Fatty acid salts (350 mM and pH 10. Read More

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http://dx.doi.org/10.4265/bio.22.153DOI Listing
January 2018
9 Reads