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Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]

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https://www.readbyqxmd.com/read/28410799/genomic-identification-and-characterization-of-the-elite-strains-bradyrhizobium-yuanmingense-br-3267-and-bradyrhizobium-pachyrhizi-br-3262-recommended-for-cowpea-inoculation-in-brazil
#1
Jakson Leite, Samuel Ribeiro Passos, Jean Luiz Simões-Araújo, Norma Gouvêa Rumjanek, Gustavo Ribeiro Xavier, Jerri Édson Zilli
The leguminous inoculation with nodule-inducing bacteria that perform biological nitrogen fixation is a good example of an "eco-friendly agricultural practice". Bradyrhizobium strains BR 3267 and BR 3262 are recommended for cowpea (Vigna unguiculata) inoculation in Brazil and showed remarkable responses; nevertheless neither strain was characterized at species level, which is our goal in the present work using a polyphasic approach. The strains presented the typical phenotype of Bradyrhizobium with a slow growth and a white colony on yeast extract-mannitol medium...
March 31, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28365094/high-temperature-ethanol-production-using-thermotolerant-yeast-newly-isolated-from-greater-mekong-subregion
#2
Atiya Techaparin, Pornthap Thanonkeo, Preekamol Klanrit
The application of high-potential thermotolerant yeasts is a key factor for successful ethanol production at high temperatures. Two hundred and thirty-four yeast isolates from Greater Mekong Subregion (GMS) countries, i.e., Thailand, The Lao People's Democratic Republic (Lao PDR) and Vietnam were obtained. Five thermotolerant yeasts, designated Saccharomyces cerevisiae KKU-VN8, KKU-VN20, and KKU-VN27, Pichia kudriavzevii KKU-TH33 and P. kudriavzevii KKU-TH43, demonstrated high temperature and ethanol tolerance levels up to 45°C and 13% (v/v), respectively...
March 18, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28389190/detection-of-vancomycin-resistant-enterococci-vre-in-stool-specimens-submitted-for-clostridium-difficile-toxin-testing
#3
Sevim Özsoy, Arzu İlki
The aim of this study was to determine the association between Clostridium difficile (C. difficile) and vancomycin-resistant Enterococcus (VRE) and efficacy of screening stools submitted for C. difficile toxin assay for prevalence of VRE. Between April 2012 and February 2014, 158 stool samples submitted for C. difficile toxin to the Marmara University Microbiology Laboratory, were included in the study. Stool samples were analyzed by enzyme immuno assay test; VIDAS (bioMerieux, France) for Toxin A&B. Samples were inoculated on chromID VRE (bioMerieux, France) and incubated 24h at 37°C...
March 17, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28454676/effects-of-monosulfuron-ester-on-metabolic-processes-of-nitrogen-fixing-cyanobacteria-anabaena-flos-aquae-and-anabaena-azotica
#4
Jian Ying Shen, Jin Zhi Liao, Li Li Guo, Rui Fang Su
Presence of the relatively new sulfonylurea herbicide monosulfuron-ester at 0.03-300nmol/L affected the growth of two non-target nitrogen-fixing cyanobacteria (Anabaena flos-aquae and Anabaena azotica) and substantially inhibited in vitro Acetolactate synthase activity, with IC50 of 3.3 and 101.3nmol/L for A. flos-aquae and A. azotica, respectively. Presenting in 30-300nmol/L, it inhibited protein synthesis of the cyanobacteria with less amino acids produced as its concentration increased. Our findings support the view that monosulfuron-ester toxicity in both nitrogen-fixing cyanobacteria is due to its interference with protein metabolism via inhibition of branch-chain amino acid biosynthesis, and particularly Acetolactate synthase activity...
March 11, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28359856/evaluation-of-short-chain-length-polyhydroxyalkanoate-accumulation-in-bacillus-aryabhattai
#5
Aneesh Balakrishna Pillai, Arjun Jaya Kumar, Kavitha Thulasi, Harikrishnan Kumarapillai
This study was focused on the polyhydroxybutyrate (PHB) accumulation property of Bacillus aryabhattai isolated from environment. Twenty-four polyhydroxyalkanoate (PHA) producers were screened out from sixty-two environmental bacterial isolates based on Sudan Black B colony staining. Based on their PHA accumulation property, six promising isolates were further screened out. The most productive isolate PHB10 was identified as B. aryabhattai PHB10. The polymer production maxima were 3.264g/L, 2.181g/L, 1.47g/L, 1...
March 11, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28347590/draft-genome-analysis-of-dietzia-sp-111n12-1-isolated-from-the-south-china-sea-with-bioremediation-activity
#6
Shanjun Yang, Mingjia Yu, Jianming Chen
Dietzia sp. 111N12-1, isolated from the seawater of South China Sea, shows strong petroleum hydrocarbons degradation activity. Here, we report the draft sequence of approximately 3.7-Mbp genome of this strain. To the best of our knowledge, this is the first genome sequence of Dietzia strain isolated from the sea. The genome sequence may provide fundamental molecular information on elucidating the metabolic pathway of hydrocarbons degradation in this strain.
March 11, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28283415/fermentation-process-for-production-of-apple-based-kefir-vinegar-microbiological-chemical-and-sensory-analysis
#7
Roberta Oliveira Viana, Karina Teixeira Magalhães-Guedes, Roberto Alves Braga, Disney Ribeiro Dias, Rosane Freitas Schwan
The aim of this study was to develop a kefir apple-based vinegar and evaluate this fermentation process using new methodology with Biospeckle Laser. Brazilian kefir grains were inoculated in apple must for vinegar production. In this study, the microbial community present in kefir, and correspondent vinegar, was investigated using Matrix Assisted Laser Desorption/Ionization - Time of Flight Mass Spectrometry (MALDI-TOF MS) technique. Saccharomyces cerevisiae, Lactobacillus paracasei, Lactobacillus plantarum, Acetobacter pasteurianus and Acetobacter syzygii were the microbial species identified...
March 7, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28256389/analysis-of-microbial-diversity-in-shenqu-with-different-fermentation-times-by-pcr-dgge
#8
Tengfei Liu, Tianzhu Jia, Jiangning Chen, Xiaoyu Liu, Minjie Zhao, Pengpeng Liu
Shenqu is a fermented product that is widely used in traditional Chinese medicine (TCM) to treat indigestion; however, the microbial strains in the fermentation process are still unknown. The aim of this study was to investigate microbial diversity in Shenqu using different fermentation time periods. DGGE (polymerase chain reaction-denaturing gradient gel electrophoresis) profiles indicated that a strain of Pediococcus acidilactici (band 9) is the predominant bacteria during fermentation and that the predominant fungi were uncultured Rhizopus, Aspergillus oryzae, and Rhizopus oryzae...
April 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28162954/production-of-docosahexaenoic-acid-by-aurantiochytrium-sp-atcc-pra-276
#9
Valcenir Júnior Mendes Furlan, Victor Maus, Irineu Batista, Narcisa Maria Bandarra
The high costs and environmental concerns associated with using marine resources as sources of oils rich in polyunsaturated fatty acids have prompted searches for alternative sources of such oils. Some microorganisms, among them members of the genus Aurantiochytrium, can synthesize large amounts of these biocompounds. However, various parameters that affect the polyunsaturated fatty acids production of these organisms, such as the carbon and nitrogen sources supplied during their cultivation, require further elucidation...
April 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28130020/helicobacter-pylori-with-east-asian-type-cagpai-genes-is-more-virulent-than-strains-with-western-type-in-some-cagpai-genes
#10
Xiao-Yan Yuan, Jin-Jun Yan, Ya-Chao Yang, Chun-Mei Wu, Yan Hu, Jian-Li Geng
The severity of Helicobacter pylori-related disease is correlated with the presence and integrity of a cag pathogenicity island (cagPAI). cagPAI genotype may have a modifying effect on the pathogenic potential of the infecting strain. After analyzing the sequences of cagPAI genes, some strains with the East Asian-type cagPAI genes were selected for further analysis to examine the association between the diversity of the cagPAI genes and the virulence of H. pylori. The results showed that gastric mucosal inflammatory cell infiltration was significantly higher in patients with East Asian-type cagPAI genes H...
April 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28110805/predictive-modeling-of-pseudomonas-fluorescens-growth-under-different-temperature-and-ph-values
#11
Letícia Dias Dos Anjos Gonçalves, Roberta Hilsdorf Piccoli, Alexandre de Paula Peres, André Vital Saúde
Meat is one of the most perishable foods owing to its nutrient availability, high water activity, and pH around 5.6. These properties are highly conducive for microbial growth. Fresh meat, when exposed to oxygen, is subjected to the action of aerobic psychrotrophic, proteolytic, and lipolytic spoilage microorganisms, such as Pseudomonas spp. The spoilage results in the appearance of slime and off-flavor in food. In order to predict the growth of Pseudomonas fluorescens in fresh meat at different pH values, stored under refrigeration, and temperature abuse, microbial mathematical modeling was applied...
April 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28108350/molecular-characterization-of-methicillin-resistant-staphylococcus-aureus-isolated-from-blood-in-rio-de-janeiro-displaying-susceptibility-profiles-to-non-%C3%AE-lactam-antibiotics
#12
Alexandra Vidal Pedinotti Zuma, Danielle Ferreira Lima, Ana Paula D'Alincourt Carvalho Assef, Elizabeth Andrade Marques, Robson Souza Leão
The distinction between healthcare-associated MRSA (HA-MRSA) and community-associated MRSA (CA-MRSA) infections has become increasingly blurred. We assessed the molecular characterization and antimicrobial resistance profile for MRSA isolates from blood. Most of all (81.9%) isolates are related to known HA-MRSA and CA-MRSA epidemic lineages, such as, USA300, USA400, USA600, USA800 and USA1100. This is the first multicenter study in Rio de Janeiro.
April 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28094115/oxidative-stress-and-antioxidant-response-in-a-thermotolerant-yeast
#13
Jorge A Mejía-Barajas, Rocío Montoya-Pérez, Rafael Salgado-Garciglia, Leopoldo Aguilera-Aguirre, Christian Cortés-Rojo, Ricardo Mejía-Zepeda, Melchor Arellano-Plaza, Alfredo Saavedra-Molina
Stress tolerance is a key attribute that must be considered when using yeast cells for industrial applications. High temperature is one factor that can cause stress in yeast. High environmental temperature in particular may exert a natural selection pressure to evolve yeasts into thermotolerant strains. In the present study, three yeasts (Saccharomyces cerevisiae, MC4, and Kluyveromyces marxianus, OFF1 and SLP1) isolated from hot environments were exposed to increased temperatures and were then compared with a laboratory yeast strain...
April 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28089614/dark-septate-endophyte-decreases-stress-on-rice-plants
#14
Silvana Gomes Dos Santos, Paula Renata Alves da Silva, Andres Calderin Garcia, Jerri Édson Zilli, Ricardo Luis Louro Berbara
Abiotic stress is one of the major limiting factors for plant development and productivity, which makes it important to identify microorganisms capable of increasing plant tolerance to stress. Dark septate endophytes can be symbionts of plants. In the present study, we evaluated the ability of dark septate endophytes isolates to reduce the effects of water stress in the rice varieties Nipponbare and Piauí. The experiments were performed under gnotobiotic conditions, and the water stress was induced with PEG...
April 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28089613/high-frequency-of-hepatitis-e-virus-infection-in-swine-from-south-brazil-and-close-similarity-to-human-hev-isolates
#15
Ana Maria Passos-Castilho, Celso Francisco Hernandes Granato
Hepatitis E virus is responsible for acute and chronic liver infections worldwide. Swine hepatitis E virus has been isolated in Brazil, and a probable zoonotic transmission has been described, although data are still scarce. The aim of this study was to investigate the frequency of hepatitis E virus infection in pigs from a small-scale farm in the rural area of Paraná State, South Brazil. Fecal samples were collected from 170 pigs and screened for hepatitis E virus RNA using a duplex real-time RT-PCR targeting a highly conserved 70nt long sequence within overlapping parts of ORF2 and ORF3 as well as a 113nt sequence of ORF2...
April 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28089612/growth-kinetic-models-of-five-species-of-lactobacilli-and-lactose-consumption-in-batch-submerged-culture
#16
Fazlollah Rezvani, Fatemeh Ardestani, Ghasem Najafpour
Kinetic behaviors of five Lactobacillus strains were investigated with Contois and Exponential models. Awareness of kinetic behavior of microorganisms is essential for their industrial process design and scale up. The consistency of experimental data was evaluated using Excel software. L. bulgaricus was introduced as the most efficient strain with the highest biomass and lactic acid yield of 0.119 and 0.602gg(-1) consumed lactose, respectively. The biomass and carbohydrate yield of L. fermentum and L. lactis were slightly less and close to L...
April 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28089161/genome-wide-gene-expression-patterns-in-dikaryon-of-the-basidiomycete-fungus-pleurotus-ostreatus
#17
Tianxiang Liu, Huiru Li, Yatong Ding, Yuancheng Qi, Yuqian Gao, Andong Song, Jinwen Shen, Liyou Qiu
Dikarya is a subkingdom of fungi that includes Ascomycota and Basidiomycota. The gene expression patterns of dikaryon are poorly understood. In this study, we bred a dikaryon DK13×3 by mating monokaryons MK13 and MK3, which were from the basidiospores of Pleurotus ostreatus TD300. Using RNA-Seq, we obtained the transcriptomes of the three strains. We found that the total transcript numbers in the transcriptomes of the three strains were all more than ten thousand, and the expression profile in DK13×3 was more similar to MK13 than MK3...
April 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28081979/malignant-catarrhal-fever-in-brazilian-cattle-presenting-with-neurological-syndrome
#18
Maira de S N Martins, Alessandra M M G de Castro, Michele Dos S Lima, Vivian da S C Pinto, Thaís G da Silva, Claudia Del Fava, Claudio Regis Depes, Liria H Okuda, Edviges M Pituco
Malignant Catarrhal Fever (MCF) was investigated in the central nervous system of cattle with neurological syndrome. Two-hundred-ninety samples were analyzed by histology, and molecular methods to detect ovine herpesvirus type 2 (OvHV-2) were optimized and validated. The qualitative polymerase chain reaction (qualitative PCR) analytical sensitivity was 10(1)DNA copies/μL and found 4.8% (14/290) positive for OvHV-2. The quantitative polymerase chain reaction (qPCR) analytical sensitivity was 10(0)DNA copy/μL and 5...
April 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28065387/phenol-degradation-and-genotypic-analysis-of-dioxygenase-genes-in-bacteria-isolated-from-sediments
#19
Mengyang Tian, Dongyun Du, Wei Zhou, Xiaobo Zeng, Guojun Cheng
The aerobic degradation of aromatic compounds by bacteria is performed by dioxygenases. To show some characteristic patterns of the dioxygenase genotype and its degradation specificities, twenty-nine gram-negative bacterial cultures were obtained from sediment contaminated with phenolic compounds in Wuhan, China. The isolates were phylogenetically diverse and belonged to 10 genera. All 29 gram-negative bacteria were able to utilize phenol, m-dihydroxybenzene and 2-hydroxybenzoic acid as the sole carbon sources, and members of the three primary genera Pseudomonas, Acinetobacter and Alcaligenes were able to grow in the presence of multiple monoaromatic compounds...
April 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28063922/efficacy-and-safety-of-a-four-drug-fixed-dose-combination-regimen-versus-separate-drugs-for-treatment-of-pulmonary-tuberculosis-a-systematic-review-and-meta-analysis
#20
REVIEW
Glaura C Lima, Emilia V Silva, Pérola de O Magalhães, Janeth S Naves
INTRODUCTION: Tuberculosis, particularly multi-drug-resistant tuberculosis, is a major cause of morbidity and mortality worldwide. To the best of our knowledge, however, no study to date has assessed the combined use of the four available drugs for tuberculosis treatment, which is an issue of great clinical relevance. OBJECTIVE: To determine whether the four-drug fixed-dose combination is safer or more effective than separate drugs for treatment of pulmonary tuberculosis...
April 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
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