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Journal of Applied Microbiology

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https://www.readbyqxmd.com/read/28106311/potential-applications-of-non-thermal-plasmas-against-biofilm-associated-microorganisms-in-vitro
#1
REVIEW
Pradeep Puligundla, Chulkyoon Mok
Biofilms as complex microbial communities attached to surfaces are posing several challenges in different sectors, ranging from food and healthcare to desalination and power generation. Biofilms survive in hostile environments due to a distinct physiology and behavior in comparison to their planktonic counterparts. They are ubiquitous, resilient, and difficult to eradicate due to their resistant phenotype. Several chemical-based cleaning and disinfection regimens are conventionally used against biofilm-dwelling microorganisms in vitro...
January 20, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28106302/occurrence-of-putative-virulence-genes-on-arcobacter-butzleri-isolated-from-three-different-environmental-sites-throughout-the-dairy-chain
#2
S Piva, G R Gariano, P Bonilauri, F Giacometti, L Decastelli, D Florio, E Massella, A Serraino
AIMS: This comparative study investigated the occurrence of cadF, cj1349, ciaB, pldA, tlyA, hecA, hecB, mviN, irgA, IroE genes in 212 Arcobacter butzleri isolated from three different environmental sites linked to the dairy chain (farms, industrial and artisanal dairy plants) located in three Italian regions (Lombardy, Emilia-Romagna and Calabria). METHODS AND RESULTS: According to the presence of these genes, different pathotypes (P-types) were determined. The main genes detected were: ciaB, mviN, tlyA, cj1349, pldA and cadF while the least common genes were: iroE, hecA, hecB and irgA...
January 20, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28092141/laundry-hygiene-how-to-get-more-than-clean
#3
REVIEW
Dirk P Bockmühl
Although laundering should mainly remove stains and dirt from used and worn textiles, the elimination of microbial contamination is an important aim of the laundry process as well. While industrial and institutional laundering employs standardized processes using high temperatures (i.e. 60°C and above) and bleaching agents to ensure a sufficient hygienic reconditioning of textiles, domestic laundering processes are less defined and not always led by purposeful aims. The strive for energy efficiency of household appliances has resulted in a decrease in washing temperatures in Europe during the last decades and convenience aspects led to an increased use of liquid detergents that do not contain bleach which in turn impacts the antimicrobial efficacy of domestic laundering...
January 16, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28092137/isolation-and-characterization-of-rhizobium-sp-strain-ys-1r-that-degrades-lignin-in-plant-biomass
#4
Colin A Jackson, Matthew B Couger, Madhu Prabhakaran, Karthikeyan D Ramachandriya, Patricia Canaan, Babu Z Fathepure
AIMS: The aim of this work was to isolate novel lignin degrading organisms. METHODS AND RESULTS: Several pure cultures of bacteria that degrade lignin were isolated from bacterial consortia developed from decaying biomass. Among the isolates, Rhizobium sp. strain YS-1r (closest relative of Rhizobium petrolearium Strain SL-1) was explored for its lignin degrading ability. Microcosm studies showed that strain YS-1r was able to degrade a variety of lignin monomers, dimers, and also native lignin in switchgrass and alfalfa...
January 16, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28066967/artepillin-c-and-phenolic-compounds-responsible-for-antimicrobial-and-antioxidant-activity-of-green-propolis-and-baccharis-dracunculifolia-dc
#5
R S Veiga, S Mendonça, P B Mendes, N Paulino, M J Mimica, A A Lagareiro Netto, I S Lira, B G C López, V Negrão, M C Marcucci
AIMS: This study investigates the antimicrobial activity in Staphylococcus aureus isolates (MSSA - Methicillin Sensitive Staphylococcus aureus and MRSA - Methicillin Resistant Staphylococcus aureus) and antioxidant activity of green propolis, Baccharis dracunculifolia DC extracts and Artepillin C(™) . METHODS AND RESULTS: The amount of Artepillin C in different extracts was determined by HPLC analysis. Minimum Inhibitory Concentrations 90 (MIC90) was determined using 40 isolates of Staphylococcus aureus inoculated in Müeller-Hinton agar culture medium containing the green-propolis and Baccharis dracunculifolia DC extracts...
January 9, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28063197/aerobic-metabolism-in-the-genus-lactobacillus-impact-on-stress-response-and-potential-applications-in-the-food-industry
#6
REVIEW
Teresa Zotta, Eugenio Parente, Annamaria Ricciardi
This review outlines the recent advances in the knowledge on aerobic and respiratory growth of lactic acid bacteria, focusing on the features of respiration-competent lactobacilli. The species of the genus Lactobacillus have been traditionally classified as oxygen tolerant anaerobes, but it has been demonstrated that several strains are able to use oxygen as a substrate in reactions mediated by flavin oxidases and, in some cases, to synthesize a minimal respiratory chain. The occurrence of genes related to aerobic and respiratory metabolism and to oxidative stress response apparently correlates with the taxonomic position of lactobacilli...
January 7, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28055130/effect-of-biochanin-a-on-corn-grain-zea-mays-fermentation-by-bovine-rumen-amylolytic-bacteria
#7
Brittany E Harlow, Michael D Flythe, Glen E Aiken
AIMS: The objective was to determine the effect of biochanin A (BCA), an isoflavone produced by red clover (Trifolium pratense L.), on corn fermentation by rumen microorganisms. METHODS AND RESULTS: When bovine rumen bacterial cell suspensions (n = 3) were incubated (24 h, 39 °C) with ground corn, amylolytic bacteria including group D Gram-positive cocci (GPC; Streptococcus bovis; enterococci) proliferated, cellulolytic bacteria were inhibited, lactate accumulated, and pH declined...
January 5, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28055127/lippia-origanoides-essential-oil-an-efficient-and-safe-alternative-to-preserve-food-cosmetic-and-pharmaceutical-products
#8
Camila Hernandes, Edieidia Souza Pina, Silvia H Taleb-Contini, Bianca Waléria Bertoni, Ivanice Maria Cestari, Lívia Greghi Espanha, Eliana A Varanda, Katyana França Bonini Camilo, Edson Zangiacome Martinez, Suzelei de Castro França, Ana Maria Soares Pereira
AIM: The aim of this work was to evaluated the efficacy and safety of Lippia origanoides essential oil as a preservative in industrial products. METHODS AND RESULTS: The composition, antimicrobial activity, mutagenic and toxic potential of L. origanoides was determined. Then the effect of essential oil as preservative in food, cosmetics and pharmaceutical products was evaluated. The essential oil of L. origanoides consisted mainly of oxygenated monoterpenes (38...
January 5, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28052586/modelling-the-effect-of-ph-and-water-activity-in-the-growth-of-aspergillus-fumigatus-isolated-from-corn-silage
#9
V Alonso, L Cavaglieri, A J Ramos, A Torres, S Marin
AIMS: The aim of this work was to use mathematical kinetic modelling to assess the combined effects of aW, pH, O2 availability and temperature onto the growth rate and time to growth of A. fumigatus strains isolated from corn silage. METHODS AND RESULTS: A full factorial design was used in which two factors were assayed: pH and aW . The aW levels assayed were 0.80, 0.85, 0.90, 0.92, 0.94, 0.96, 0.98 and 0.99. Levels of pH assayed were 3.5, 4, 4.5, 5, 6, 7, 7.5, and 8...
January 4, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28052549/adsorption-of-norovirus-and-ostreid-herpesvirus-type-1-to-polymer-membranes-for-the-development-of-passive-samplers
#10
Françoise Vincent-Hubert, Benjamin Morga, Tristan Renault, Françoise S Le Guyader
AIMS: This study was performed to develop passive sampling methodology for the detection of two viruses in seawater in the area of shellfish production, The Norovirus (NoV), a human pathogen implicated in gastroenteritis outbreaks linked to oyster consumption and the ostreid herpesvirus type 1 (OsHV-1) a virus associated with mass mortalities of Pacific oysters. METHODS AND RESULTS: Commercially membranes were tested for their capacity to adsorb virus: Zetapor, gauze, nylon, low density polyethylene (LDPE) and Polyvinylidene difluoride (PVDF)...
January 4, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28052466/effect-of-postharvest-practices-including-degreening-on-citrus-carpoplane-microbial-biomes
#11
A Gomba, L Chidamba, L Korsten
AIMS: To investigate the effect of commercial citrus packhouse processing steps on the fruit surface microbiome of Clementines and Palmer navel oranges. METHODS AND RESULTS: Viable bacteria, yeasts and fungi counts, and pyrosequencing analysis of the 16S rRNA and ITS were used to evaluate the community structure and population dynamics of phylloepiphytic bacteria and fungi associated with commercial postharvest processing. Drenching significantly reduced microbial counts in all cases except for yeasts on navels, while the extend of degreening effects varied between the citrus varieties...
January 4, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28035713/evaluation-of-the-effectiveness-of-the-potent-bis-quaternary-ammonium-compound-4-4-%C3%AE-%C3%AF-hexametylenedithio-bis-1-octylpyridinium-bromide-4dtbp-6-8-on-pseudomonas-aeruginosa
#12
Keiji Murakami, Hiromichi Yumoto, Ayu Murakami, Takashi Amoh, Darija Viducic, Katsuhiko Hirota, Atsushi Tabata, Hideaki Nagamune, Hiroki Kourai, Takashi Matsuo, Yoichiro Miyake
AIMS: Quaternary ammonium compounds (QACs) including benzalkonium chloride (BAC) and cetylpyridinium chloride (CPC) are cationic surfactants and have been used widely as general disinfectants in the medical field because of their strong antibacterial effects and low cytotoxicity to human cells. 4,4'-(α,ω-hexametylenedithio) bis (1-octylpyridinium bromide) (4DTBP-6,8) is one of the potent bis-QACs synthesized to improve the antimicrobial activities of mono-QACs such as BAC. This study aimed to assess the effectiveness of 4DTBP-6,8 against Pseudomonas aeruginosa, a prevalent hospital pathogen...
December 30, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28035706/bioactive-glasses-as-delivery-systems-for-antimicrobial-agents
#13
REVIEW
Josefina Rivadeneira, Alejandro Gorustovich
Most biomaterial-associated infections are caused by opportunistic pathogens and bacteria that are regularly found within the microflora of the implant site. In addition, a biomaterial implant or device remains at risk of infection by hematogenous spread of bacteria disseminated from infections elsewhere in the body or from infected peri-implant tissue in revision surgery. The resulting infections are frequently accompanied by patient morbidity and discomfort and can lead to surgical replacement of the implant after lengthy, unsuccessful attempts to mitigate infections with antibiotic treatments...
December 30, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28032942/first-record-of-epizootics-in-the-ocola-skipper-panoquina-ocola-lepidopera-hesperiidae-caused-by-isaria-tenuipes-in-flooded-rice-fields-of-central-brazil
#14
Gabriel Moura Mascarin, Christopher A Dunlap, José Alexandre de Freitas Barrigossi, Eliane Dias Quintela, Newton Cavalcanti de Noronha
AIMS: We report the first occurrence of an epizootic of the ascomycete fungus Isaria tenuipes (teleomorph Cordyceps takaomontana) on the ocola skipper Panoquina ocola (Lepidoptera: Hesperiidae), an insect pest affecting rice in Brazil. METHODS AND RESULTS: Field surveys in flooded rice fields in the state of Goiás in Brazil were conducted, and a fungal pathogen of a caterpillar pest (Panoquina ocola) was serendipitously found. This fungus inflicted high infection levels (average 86...
December 29, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28032938/environmental-cues-that-induce-the-physiology-of-solid-medium-a-study-on-lovastatin-production-by-aspergillus-terreus
#15
N Ávila, M R Tarragó-Castellanos, J Barrios-González
AIM: The aim of this work was to identify the main environmental factors that induce the special physiology displayed by fungi growing in solid culture,-that is, higher secondary metabolite production-compared with those in submerged culture. METHODS AND RESULTS: Lovastatin specific production was used as an indicator of the physiological status, and different model culture systems were used to evaluate the impact of potential solid-state fermentation (SSF) environmental stimuli...
December 29, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28032924/recent-findings-in-pulsed-light-disinfection
#16
REVIEW
B Kramer, J Wunderlich, P Muranyi
Non-thermal disinfection technologies are gaining increasing interest in the field of minimally processed food in order to improve the microbial safety or to extend the shelf life. Especially fresh-cut produce or meat and fish products are vulnerable to microbial spoilage but due to their sensitivity, they require gentle preservation measures. The application of intense light pulses (PL) of a broad spectral range comprising ultraviolet, visible and near infrared irradiation is currently investigated as a potentially suitable technology to reduce microbial loads on different food surfaces or in beverages...
December 29, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28028882/simultaneous-lactic-acidification-and-coagulation-by-using-recombinant-lactococcus-lactis-strain
#17
Mohammad Raftari, Sobhan Ghafourian, Fatimah Abu Bakar
AIMS: This study was an attempt to create a novel milk clotting procedure using recombinant bacterium capable of milk coagulation. METHODS AND RESULTS: The Rhizomucor pusillus proteinase (RPP) gene was sub-cloned into pALF expression vector. The recombinant pALF-RPP vector was then electro-transferred into L. lactis. Finally, milk coagulation ability of recombinant L. lactis carrying RPP gene was evaluated. Nucleotide sequencing of DNA insertion from the clone revealed that the RPP activity corresponded to an open reading frame consisting of 1218 bp coding for a 43...
December 28, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28028873/development-of-a-qualitative-real-time-pcr-for-microbiological-quality-control-testing-in-mammalian-cell-culture-production
#18
Kerstin Kleinschmidt, Erik Wilkens, Stefanie P Glaeser, Peter Kämpfer, Alexandra Staerk, David Roesti
AIMS: The aim of this study was to develop and evaluate a real-time PCR technology for microbiological control methods to examine individualized cell therapeutics, an emerging class of pharmaceutical formulations. METHODS AND RESULTS: Oligonucleotide primers and hybridization probe for bacterial detection targeting the 16S rRNA gene and were adapted based on Nadkarni et al.; 2002. For detection of yeast and molds, primers and probe were designed from conserved sequences of the 18S rRNA gene in this study...
December 28, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28004519/antimicrobial-assay-and-genetic-screening-of-selected-freshwater-cyanobacteria-and-identification-of-a-biomolecule-dihydro-2h-pyran-2-one-derivative
#19
A Srivastava, V K Singh, S Patnaik, J Tripathi, P Singh, G Nath, R K Asthana
AIMS: Explorations of freshwater cyanobacteria as antimicrobial (bacteria, fungi and MRSA strains) drug resource using bioassay, NRPS (non-ribosomal polypeptide synthetase) and PKS (polyketide synthase) genes, as well as in silico approach. METHODS AND RESULTS: We have bioassayed the extracts of Phormidium CCC727, Geitlerinema CCC728, Arthrospira CCC729, Leptolyngbya CCC732, Phormidium CCC730, Phormidium CCC731 against six pathogenic bacteria Gram (+ve): Staphylococcus aureus including seven clinical methicillin-resistant S...
December 22, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28004480/a-metagenomic-study-of-the-preventive-effect-of-lactobacillus-rhamnosus-gg-on-intestinal-polyp-formation-in-apc-min-mice
#20
Yueqiong Ni, Victoria Ho Yee Wong, William Chi Shing Tai, Jun Li, Wing Yan Wong, Magnolia Muk Lan Lee, Fiona Long Yan Fong, Hani El-Nezami, Gianni Panagiotou
AIMS: To investigate the in vivo effects of Lactobacillus rhamnosus GG (LGG) on intestinal polyp development and the interaction between this single-organism probiotic and the gut microbiota therein. METHODS AND RESULTS: The Apc(Min/+) mouse model was used to study the potential preventive effect of LGG on intestinal polyposis, while shotgun metagenomic sequencing was employed to characterize both taxonomic and functional changes within gut microbial community. We found that the progression of intestinal polyps in the control group altered the community functional profile remarkably despite small variation in the taxonomic diversity...
December 22, 2016: Journal of Applied Microbiology
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