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Journal of Applied Microbiology

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https://www.readbyqxmd.com/read/28815882/application-of-chitosan-microparticles-for-mitigation-of-salmonella-in-agricultural-water
#1
Ying Fan, Amber Ginn, M Kang, Kwang Cheol Jeong, Anita C Wright
AIM: The activity of chitosan microparticles (CM) was examined using a matrix of conditions in order to assess the efficacy of CM as a mitigation against various strains of Salmonella enterica in agricultural water. METHODS AND RESULTS: Different concentrations of CM (0, 0.01, 0.1, 0.2, 0.3% w/v) were examined for antimicrobial activity against log vs. stationary phase cells of Salmonella and at different conditions of temperature, salinity, and pH. Results showed greatest activity with 0...
August 17, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28815820/functional-analysis-of-the-biosynthetic-gene-cluster-required-for-immunity-and-secretion-of-a-novel-lactococcus-specific-bacteriocin-lactococcin-z
#2
G M Daba, N Ishibashi, T Zendo, K Sonomoto
AIMS: Characterization of the biosynthesis (secretion and immunity) of lactococcin Z. METHODS AND RESULTS: Lactococcin Z is produced by Lactococcus lactis QU 7. DNA sequence analysis revealed that the lactococcin Z gene cluster (approximately 5.1 kb) includes four genes encoding putative biosynthetic proteins; LczB (self-immunity protein), LczC (an ABC transporter), and LczD (a transport accessory protein), besides the previously identified LczA. LczB showed 25...
August 17, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28815819/novel-consortium-of-klebsiella-variicola-and-lactobacillus-species-enhances-the-functional-potential-of-fermented-dairy-products-by-increasing-the-availability-of-branched-chain-amino-acids-and-the-amount-of-distinctive-volatiles
#3
H Rosales-Bravo, H C Morales-Torres, J Vázquez-Martínez, J Molina-Torres, V Olalde-Portugal, L P Partida-Martínez
AIMS: Identify novel bacterial taxa that could increase the availability of branched-chain amino acids and the amount of distinctive volatiles during skim milk fermentation. METHODS AND RESULTS: We recovered 344 bacterial isolates from stool samples of healthy and breastfed infants. Five were selected based on their ability to produce branched-chain amino acids. Three strains were identified as Escherichia coli, one as Klebsiella pneumoniae and other as Klebsiella variicola by molecular and biochemical methods...
August 17, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28815811/study-of-the-effects-of-spray-drying-in-whey-starch-on-the-probiotic-capacity-of-lactobacillus-rhamnosus-64-in-the-gut-of-mice
#4
L Lavari, P Burns, R Páez, J Reinheimer, G Vinderola
AIMS: To evaluate the effects of spray-drying of Lactobacillus rhamnosus 64 on its capacity to modulate the gut immune response and on the attenuation of TNBS-induced colitis in mice. METHODS AND RESULTS: L. rhamnosus 64 was spray-dried in cheese whey-starch solution and administered to mice for three, six or ten consecutive days. Peritoneal macrophage phagocytic activity, secretory-IgA (S-IgA) levels in the small intestinal fluid and TNFα, IFNγ, IL-10, IL-6 and IL-2 levels in homogenates of the small and large intestine were determined...
August 17, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28801990/degradation-of-euptox-a-by-tannase-producing-rumen-bacteria-from-migratory-goats
#5
D Sharma, G Mal, A Kannan, R Bhar, R Sharma, B Singh
AIMS: The gut microbiota capable of degrading plant biomass and anti-nutritional phytometabolites are of immense importance. This study reports isolation and characterization of tannase-producing rumen bacteria that could also degrade euptox A (9-oxo-10,11-dehydroageraphorone) present in Eupatorium adenophorum (Spreng). METHODS AND RESULTS: Migratory Gaddi goats were selected as source of inoculums for isolating rumen bacteria with ability to produce tannase which catalyzes degradation of hydrolysable tannins (HTs)...
August 12, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28801977/isolation-identification-and-characterization-of-lignin-degrading-bacteria-from-qinling-china
#6
C-X Yang, T Wang, L-N Gao, H-J Yin, X Lü
AIMS: Lignin is an aromatic heteropolymer forming a physical barrier and is a big challenge in biomass utilization. This paper firstly investigated lignin-degradation bacteria from rotten wood in Qinling Mountain. METHODS AND RESULTS: 19 potential strains were selected and ligninolytic enzyme activities were determined during 84 h. The strains which had higher enzymes activities were selected. Further the biodegradation of wheat straw lignin and alkali lignin was evaluated, which indicated Burkholderia sp...
August 12, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28799283/selection-and-transfer-of-an-inci1-tet-a-plasmid-of-escherichia-coli-in-an-ex-vivo-model-of-the-porcine-cecum-at-doxycycline-concentrations-caused-by-cross-contaminated-feed
#7
Laura E J Peeters, Thijs De Mulder, Els Van Coillie, Judith Huygens, Annemieke Smet, Els Daeseleire, Jeroen Dewulf, Hein Imberechts, Patrick Butaye, Freddy Haesebrouck, Siska Croubels, Marc Heyndrickx, Geertrui Rasschaert
AIMS: The aim of this study was to investigate the effect of subtherapeutic intestinal doxycycline (DOX) concentrations (4 and 1 mg l(-1) ), caused by cross-contamination of feed, on the enrichment of a DOX resistant commensal E. coli and it's resistance plasmid in an ex vivo model of the porcine cecum. METHODS AND RESULTS: A DOX resistant, tet(A) carrying, porcine commensal E. coli strain (EC 682) was cultivated for 6 days in the porcine cecum model under different conditions (0, 1 and 4 mg l(-1) DOX)...
August 11, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28799270/non-activated-titanium-dioxide-nanoparticles-promote-the-growth-of-chlamydia-trachomatis-and-decrease-the-antimicrobial-activity-of-silver-nanoparticles
#8
Anita Bogdanov, László Janovák, Ildikó Lantos, Valéria Endrész, Dániel Sebők, Tamás Szabó, Imre Dékány, Judit Deák, Zsolt Rázga, Katalin Burián, Dezső P Virok
AIMS: Chlamydia trachomatis and herpes simplex virus are the most prevalent bacterial and viral sexually transmitted infections. Due to the chronic nature of their infections, they are able to interact with titanium-dioxide nanoparticles applied as food additives or drug delivery vehicles. The aim of our study was to describe the interactions of these two prevalent pathogens with the titanium-dioxide nanoparticles. METHODS AND RESULTS: Chlamydia trachomatis and herpes simplex virus-2 were treated with non-activated titanium-dioxide nanoparticles, silver nanoparticles and silver decorated titanium-dioxide nanoparticles before infection of HeLa and Vero cells...
August 11, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28799253/production-of-bioethanol-in-sugarcane-bagasse-hemicellulosic-hydrolysate-by-scheffersomyces-parashehatae-scheffersomyces-illinoinensis-and-spathaspora-arborariae-isolated-from-brazilian-ecosystems
#9
R M Cadete, M A Melo-Cheab, K J Dussán, R C L B Rodrigues, S S da Silva, F C O Gomes, C A Rosa
AIMS: This study aimed to evaluate new d-xylose-fermenting yeasts from Brazilian ecosystems for the production of second-generation ethanol. METHODS AND RESULTS: d-xylose-fermenting yeasts isolated from rotting wood and wood-boring insects were identified as the species Scheffersomyces parashehatae, Sc. illinoinensis, Spathaspora arborariae, and Wickerhamomyces rabaulensis. Among the yeasts tested, those of Scheffersomyces parashehatae exhibited the highest ethanol production when cultivated on complex medium (Yp/s(et) = 0...
August 11, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28795522/assessment-of-carvacrol-for-control-of-avian-aspergillosis-in-intratracheally-challenged-chickens-in-comparison-to-voriconazole-with-a-reference-on-economic-impact
#10
Y H Tartor, F A M Hassan
AIM: This study was designed to investigate the efficacy of essential oils (EOs) as an alternative prophylaxis and treatment for avian aspergillosis. METHODS AND RESULTS: The in vitro susceptibility of A. fumigatus strains to antifungal drugs and carvacrol, thymol, eugenol, thymoquinone and cinnamon was determined using the macro-diffusion and microdilution methods. Carvacrol has antifungal activity in comparison to voriconazole (VCZ) (MIC 0.5, 0.25μg/ml, respectively)...
August 9, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28795469/bacterial-biomes-and-potential-human-pathogens-in-irrigation-water-and-leafy-greens-from-different-production-systems-described-using-pyrosequencing
#11
M Jongman, L Chidamba, L Korsten
AIMS: To investigate the influence of irrigation water microbial quality on leafy green vegetables produced in commercial and small-scale farms as well as homestead gardens using pyrosequencing. METHODS AND RESULTS: Next generation sequencing analysis of the V1-V3 hypervariable region of bacterial 16S rDNA was used to compare bacterial diversity in irrigation water sources and on leafy vegetables. In all samples (12) analyzed, the phylum Proteobacteria (64.5%), class Gammaproteobacteria (56...
August 9, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28792661/multi-effect-of-the-water-soluble-moringa-oleifera-lectin-against-serratia-marcescens-and-bacillus-sp-antibacterial-antibiofilm-and-anti-adhesive-properties
#12
M C Moura, D S Trentin, T H Napoleão, M Primon Barros, A S Xavier, N P Carneiro, P M G Paiva, A J Macedo, L C B B Coelho
AIMS: To evaluate the antibiofilm potential of water-soluble Moringa oleifera seed lectin (WSMoL) on Serratia marcescens and Bacillus sp. METHODS AND RESULTS: WSMoL inhibited biofilm formation by S. marcescens at concentrations lower than 2.6 μg ml(-1) and impaired bacterial growth at higher concentrations, avoiding biofilm formation. For Bacillus sp., the lectin inhibited bacterial growth at all concentrations. The antibiofilm action of WSMoL is associated with damage to bacterial cells...
August 9, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28783248/coupling-metagenomics-with-cultivation-to-select-host-specific-probiotic-microorganisms-for-subtropical-aquaculture
#13
Jinming Cui, Minfeng Xiao, Mingzhu Liu, Zuowei Wang, Furong Liu, Liang Guo, Hailin Meng, Honggang Zhang, Jinfang Yang, Deng Deng, Shuangqiang Huang, Yingfei Ma, Chenli Liu
AIMS: To demonstrate a non-empirical workflow to select host-specific probiotics for aquaculture industry. METHODS AND RESULTS: By using both culture-dependent and -independent methods, we have systematically investigated, for the first time, the gut microbiota of twelve subtropical aquatic animal species. We found that the diversity, abundance, and distribution of gut microorganisms of these animals were host-specific, and that lactic acid bacteria (LAB) were predominant among the indigenous probiotic microbes...
August 7, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28783246/the-effect-of-carabrone-on-mitochondrial-respiratory-chain-complexes-in-gaeumannomyces-graminis
#14
Mei Wang, Lanying Wang, Lirong Han, Xing Zhang, Juntao Feng
AIMS: To evaluate the effect of carabrone on mitochondrial respiratory chain complexes in Gaeumannomyces graminis to identify carabrone targets. METHODS AND RESULTS: The influence of carabrone on mitochondria in G. graminis mycelia was determined and the activity of complexes I-V, citrate synthase, and respiratory chain complexes I+III and II+III was evaluated following treatment with 30% effective concentration (EC30 ) as well as EC50 and EC70 of carabrone for 0, 6, 12 and 24 h...
August 7, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28779537/prudent-use-and-regulatory-guidelines-for-veterinary-antibiotics-politics-or-science
#15
REVIEW
Peter Silley, Bernd Stephan
Regulatory guidelines are in place across the world to ensure that approval of antibiotics is consistent with current scientific understanding of quality, efficacy and safety including minimising the risk of development of antibiotic resistance. We suggest the regulatory process is fit for purpose and does indeed approve products that are safe for use with regard to development of antibiotic resistance. However we maintain that in order to preserve the longevity of antibiotics, treatment should be based on an established diagnosis and normally only antibiotics authorised for the diagnosed indication and indicated bacteria are used...
August 5, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28776899/an-alternative-sterility-assessment-for-parenteral-drug-products-using-isothermal-microcalorimetry
#16
D Brueckner, S Krähenbühl, U Zuber, G Bonkat, O Braissant
AIMS: Production and release of injectable drug solutions are highly regulated since the administration of injectables bypasses natural body barriers. The sterility test is the last opportunity of product quality assessment. However, sterility is currently assessed by visual inspection (VI) that is time consuming and somewhat subjective. Therefore, we assessed isothermal microcalorimetry (IMC) as a replacement for the VI of the filtration based state-of-the-art sterility control. METHODS AND RESULTS: We used ATCC strains and house isolates to artificially contaminate frequently produced monoclonal antibodies (Avastin, Mabthera, Herceptin)...
August 4, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28772337/microalgae-community-shifts-during-the-biogas-upgrading-in-an-alkaline-open-photobioreactor
#17
Claudia Isela Granada-Moreno, Arturo Aburto-Medina, Daniel de Los Cobos Vasconcelos, Armando González-Sánchez
AIMS: To achieve the functional specialization of a microalgae community through operational tuning of an open-photobioreactor used for biogas upgrading under alkaline conditions. METHODS AND RESULTS: An open-photobioreactor was inoculated with an indigenous microalgae sample from the Texcoco Soda-Lake. A microalgae community was adapted to fix CO2 from synthetic biogas through different culture conditions reaching a maximum of 220 mg CO2 L(-1) d(-1) . Picochlorum sp...
August 3, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28766823/isolation-of-bacteriophages-from-air-using-vacuum-filtration-technique-an-improved-and-novel-method
#18
Bhagyashree Magare, Aparna Nair, Krishna Khairnar
AIM: Development of a simple and economical air sampler for isolation and enrichment of bacteriophages from air samples. METHODS AND RESULTS: A vacuum filtration unit with simple modifications was used for isolation of bacteriophages from air sampled in the lavatory. Air was sampled at the rate of 62 L/min by bubbling into Mcllvaine buffer for 30 minutes, which was used as bacteriophage solution for enrichment and plaque assessment against individual hosts. Alternatively, the aforementioned phage solution was enriched using a host consortium before plaque assessment...
August 2, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28766815/rhamnolipids-and-lactonic-sophorolipids-natural-antimicrobial-surfactants-for-oral-hygiene
#19
M Elshikh, I Moya-Ramírez, H Moens, S Roelants, W Soetaert, R Marchant, I M Banat
AIMS: To assess the efficacy of rhamnolipid (mixture of mono- and di-rhamnolipid congeners, purified monorhamnolipid, dirhamnolipid and lactonic sophorolipid biosurfactants against pathogens important for oral hygiene. METHODS AND RESULTS: Acquired and produced biosurfactants were fully characterised to allow the antimicrobial activity to be assigned to the biosurfactant congeners. Antimicrobial activity was assessed using the resazurin aided microdilution method...
August 2, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28763134/response-of-microbial-community-and-catabolic-genes-to-simulated-petroleum-hydrocarbon-spills-in-soils-sediments-from-different-geographic-locations
#20
Qinglong Liu, Jingchun Tang, Xiaomei Liu, Benru Song, Meinan Zhen, Nicholas J Ashbolt
AIMS: Study the response of microbial communities and selected petroleum hydrocarbon (PH)-degrading genes on simulated PH spills in soils/sediments from different geographic locations. METHODS AND RESULTS: A microcosm experiment was conducted by spiking mixtures of petroleum hydrocarbons to soils/sediments collected from four different regions of China, including the Dagang Oilfield (DG), Sand of Bohai Sea (SS), Northeast China (NE), and Xiamen (XM). Changes in bacterial community and the abundance of PH-degrading genes (alkB, nah, and phe) were analyzed by denaturing gradient electrophoresis (DGGE) and qPCR, respectively...
August 1, 2017: Journal of Applied Microbiology
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