2,115 results match your criteria Brazilian Journal Of Microbiology[Journal]


Protein signatures to identify the different genera within the Xanthomonadaceae family.

Braz J Microbiol 2020 Jun 2. Epub 2020 Jun 2.

Department of Horticulture, University of Georgia, Tifton, GA, 31793, USA.

The Xanthomonadaceae family comprises the genera Xanthomonas and Xylella, which include plant pathogenic species that affect economically important crops. The family also includes the plant growth-promoting bacteria Pseudomonas geniculata and Stenotrophomonas rhizophila, and some other species with biotechnological, medical, and environmental relevance. Previous work identified molecular signatures that helped to understand the evolutionary placement of this family within gamma-proteobacteria. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00304-2DOI Listing

Decoding social behaviors in a glycerol dependent bacterial consortium during Reactive Blue 28 degradation.

Braz J Microbiol 2020 Jun 1. Epub 2020 Jun 1.

P. G. Department of Biosciences, Sardar Patel University, UGC-Centre of Advanced Study, Vadtal Road, Bakrol, Gujarat, 388315, India.

Biodegradation of reactive azo dyes has been an arduous problem for decades. Several efficient biosystems have been proposed for dye degradation, but most of them are dependent on the availability of costly co-substrates such as peptone, yeast extract, and/or glucose. The present study describes the azo dye degradation by a bacterial consortium using glycerol as a sole co-substrate. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00303-3DOI Listing

Antifungal resistance on Sporothrix species: an overview.

Braz J Microbiol 2020 May 31. Epub 2020 May 31.

Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.

Introduction: The treatment of human and animal sporotrichosis is often performed with antifungal agents; however, the emergence of antifungal-resistant strains of Sporothrix species has been reported. We aimed to discuss the ability of Sporothrix species in developing resistance to the conventional antifungals and mechanisms for this.

Methodology: Published data on databases (PubMed, Science Direct, Google Scholar) were investigated using a combination of keywords from 2008 to 2019 by the StArt tool. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00307-zDOI Listing

Evaluation of pyroligneous acid as a therapeutic agent against Salmonella in a simulated gastrointestinal tract of poultry.

Braz J Microbiol 2020 May 28. Epub 2020 May 28.

Pyrovac Inc, 176-2 rue Damase-Breton, Saint-Lambert-de-Lauzon, QC, G0S 2W0, Canada.

Pyroligneous acid (PA) was evaluated as a potential alternative to therapeutic antibiotics in poultry. Antimicrobial activity of PA was studied at acidic pH (2.0) and neutral pH (7. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00294-1DOI Listing

Effect of probiotic supplementation on oxidative stress markers in rats with diclofenac-induced hepatotoxicity.

Braz J Microbiol 2020 May 27. Epub 2020 May 27.

Laboratory of Molecular Toxicology, Faculty of Nature and Life Sciences, University Mohamed Seddik Benyahia of Jijel, Jijel, Algeria.

In this study, we have investigated the effect of an antioxidant probiotic pretreatment toward an overdose of diclofenac in rats (100 mg/kg bw). Rats were treated daily with the probiotic Streptococcus salivarius St.sa (10 CFU) during seven successive days and then received a single treatment with diclofenac overdose in distilled water. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00302-4DOI Listing

Morphologic, molecular, and pathogenic characterization of Phytophthora palmivora isolates causing flower rot on azalea.

Braz J Microbiol 2020 May 26. Epub 2020 May 26.

Embrapa Hortaliças, Brasília, DF, Brazil.

The objective of this work was to characterize two Phytophthora palmivora isolates causing floral blight and rot in azalea plants and to evaluate the pathogenicity of this oomycete pathogen on several plant species. Azalea plants with symptoms of flower blight and rot were obtained in the municipality of Holambra-SP. After an attempt of isolation, colonies with Phytophthora characteristics grown only on selective V8 medium. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00300-6DOI Listing

Zebrafish embryo sensitivity test as in vivo platform to anti-Shiga toxin compound screening.

Braz J Microbiol 2020 May 24. Epub 2020 May 24.

Laboratório de Bacteriologia, Instituto Butantan, São Paulo, Brazil.

Shiga toxin-producing Escherichia coli (STEC) pathotype secretes two types of AB cytotoxins (Stx1 and Stx2), responsible for complications such as hemorrhagic colitis (HC) and hemolytic uremic syndrome (HUS) in infected patients, which could lead to sequels and death. Currently, there is no effective treatment against the cytotoxic effect of these toxins. However, in order to approve any therapy molecule, an animal experiment is required in order to evaluate the efficacy and safety of therapeutic approaches. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00305-1DOI Listing

Evolution of virulence-related phenotypes of Sporothrix brasiliensis isolates from patients with chronic sporotrichosis and acquired immunodeficiency syndrome.

Braz J Microbiol 2020 May 22. Epub 2020 May 22.

Laboratório de Micologia, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Avenida Brasil, 4365, Manguinhos, Rio de Janeiro, RJ, 21045-900, Brazil.

Sporotrichosis in immunocompromised patients has a high morbidity and may cause deaths. Particularly, patients with acquired immunodeficiency syndrome (AIDS) with low T CD4 counts develop a chronic disease, with severe and widespread forms. Recently, the ability of Sporothrix brasiliensis, the main agent of zoonotic sporotrichosis, to increase its virulence in a diabetic patient without HIV infection was described. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00297-yDOI Listing

Optimization of aqueous two-phase micellar system for partial purification of L-asparaginase from Penicillium sp. grown in wheat bran as agro-industrial residue.

Braz J Microbiol 2020 May 18. Epub 2020 May 18.

Laboratory of Natural Products, Department of Pharmacy, Health Sciences School, University of Brasilia, Brasilia, Brazil.

L-asparaginase has been used in the remission of malignant neoplasms such as acute lymphoblastic leukemia. The search for new sources of this enzyme has become attractive for therapeutics. Traditional methods for biomolecule purification involve several steps. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00269-2DOI Listing

Green synthesis of gold nanoparticles using extracellular metabolites of fish gut microbes and their antimicrobial properties.

Braz J Microbiol 2020 May 18. Epub 2020 May 18.

Department of Biotechnology, Sathyabama Institute of Science and Technology (Deemed to be University) Jeppiaar Nagar, Rajiv Gandhi Road, Chennai, Tamil Nadu, 600 119, India.

In the present study, we synthesis nanoparticles using biosynthesis methods because of the eco-friendly approach. Gold nanoparticles were synthesized using extracellular metabolites of marine bacteria (Rastrelliger kanagurta, Selachimorpha sp., and Panna microdon). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00263-8DOI Listing

Improved blood culture workflow in the time to detection of microorganisms placing incubators systems outside of microbiology laboratory.

Braz J Microbiol 2020 May 18. Epub 2020 May 18.

Department of Clinical Microbiology, Hospital Universitario 12 de Octubre, Madrid, Spain.

Purpose: We analyzed the workflow of the blood culture procedure with one blood culture incubator in the microbiology laboratory, in comparison with the workflow with the incubators systems placing outside, and in a microbiology laboratory without 24-h staffing.

Methods: We assessed the elapsed time (ET) and time-to-result (TTR) in the two laboratory workflows during 1 month period in consecutive years. First period with one BACT/ALERT 3D module located in the microbiology laboratory (ML) (access 8 a. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00298-xDOI Listing

Detection methods and characterization of bovine viral diarrhea virus in aborted fetuses and neonatal calves over a 22-year period.

Braz J Microbiol 2020 May 16. Epub 2020 May 16.

Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, C1033AAJ, Buenos Aires, Argentina.

Detection of bovine viral diarrhea virus (BVDV) in aborted fetus samples is often difficult due to tissue autolysis and inappropriate sampling. Studies assessing different methods for BVDV identification in fetal specimens are scarce. The present study evaluated the agreement between different diagnostic techniques to detect BVDV infections in specimens from a large number of bovine aborted fetuses and neonatal deaths over a period of 22 years. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00296-zDOI Listing

A eukaryotic expression strategy for producing the novel antimicrobial peptide PRW4.

Braz J Microbiol 2020 May 15. Epub 2020 May 15.

Institute of Animal Nutrition, Northeast Agricultural University, No. 600 Changjiang Road, Xiangfang District, Harbin, China.

The antimicrobial peptide PMAP-36 is a cationic peptide derived from porcine myeloid. The N-terminally paired lysine of PMAP-36 was substituted with tryptophan, and the C-terminal hydrophobic tail was deleted, thereby obtaining the antimicrobial peptide PRW4. PRW4 is a α-helical antimicrobial peptide with broad-spectrum antimicrobial activity. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00291-4DOI Listing

Genetic variation in the cag pathogenicity island of Helicobacter pylori strains detected from gastroduodenal patients in Thailand.

Braz J Microbiol 2020 May 15. Epub 2020 May 15.

Department of Microbiology, Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, 52727, Republic of Korea.

There is a lack of evidence of genetic variation in the Helicobacter pylori cag-PAI in Thailand, a region with the low incidence of gastric cancer. To clarify this issue, variation in the H. pylori cag-PAI in strains detected in Thailand was characterized and simultaneously compared with strains isolated from a high-risk population in Korea. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00292-3DOI Listing

Fungal phytases: from genes to applications.

Braz J Microbiol 2020 May 14. Epub 2020 May 14.

Department of Microbiology/BIOAGRO, Federal University of Viçosa, Av. Peter Henry Rolfs s/n, Vicosa, MG, 36570-000, Brazil.

Phytic acid stores 60-90% of the inorganic phosphorus in legumes, oil seeds, and cereals, making it inaccessible for metabolic processes in living systems. In addition, given its negative charge, phytic acid complexes with divalent cations, starch, and proteins. Inorganic phosphorous can be released from phytic acid upon the action of phytases. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00289-yDOI Listing

Canine parvovirus 2b in fecal samples of asymptomatic free-living South American coatis (Nasua nasua, Linnaeus, 1766).

Braz J Microbiol 2020 May 14. Epub 2020 May 14.

Laboratory of Animal Virology, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Celso Garcia Cid Road, PR455 Km 380, P.O. Box 10011, Londrina, Paraná, 86057-970, Brazil.

Canine parvovirus type 2 (CPV-2) is classified into three subtypes (CPV-2a, CPV-2b, and CPV-2c) and is the main cause of enteritis and myocarditis in young domestic and wild animals. This study aimed to evaluate the presence of CPV-2 in the feces of asymptomatic free-living coatis from Garden Forest Reserve, Palmital city, SP, Brazil. Fecal samples from 21 coatis (both sexes, different ages, and different aspects of feces) were collected in August 2014 and March 2015. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00293-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7223230PMC

The correlation analyses of bacterial community composition and spatial factors between freshwater and sediment in Poyang Lake wetland by using artificial neural network (ANN) modeling.

Braz J Microbiol 2020 May 13. Epub 2020 May 13.

School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'An, 710129, China.

As one of the most important components of the lake ecosystem, microorganisms from the freshwater and sediment play an important role in many ecological processes. However, the difference and correlation of bacterial community between these two niches were not clear. This study investigated the diversity of microbial community of freshwater and sediment samples from fifteen locations in Poyang Lake wetland. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00285-2DOI Listing

Seroepidemiological survey on sporotrichosis-infection in rural areas of the south of Minas Gerais State, Brazil.

Braz J Microbiol 2020 May 13. Epub 2020 May 13.

Departamento de Microbiologia e Imunologia, Instituto de Ciências Biomédicas, Universidade Federal de Alfenas, Rua Gabriel Monteiro da Silva, 700 - Centro, Alfenas, Minas Gerais, 37130-001, Brazil.

Sporotrichosis is a subcutaneous mycosis caused by traumatic inoculation into the skin by fungi species of the genus Sporothrix. The disease has different clinical manifestations (cutaneous, lymphocutaneous, and disseminated), and can also progress to a systemic infection. Despite having a worldwide distribution, sporotrichosis is most prevalent in tropical and subtropical countries. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00279-0DOI Listing

Effect of rhamnolipid on the physicochemical properties and interaction of bacteria and fungi.

Braz J Microbiol 2020 May 13. Epub 2020 May 13.

Department of Molecular Medicine and Pathology, University of Auckland, Auckland, New Zealand.

Bacterial adhesion on surfaces is an essential initial step in promoting bacterial mobilization for soil bioremediation process. Modification of the cell surface is required to improve the adhesion of bacteria. The modification of physicochemical properties by rhamnolipid to Pseudomonas putida KT2442, Rhodococcus erythropolis 3586 and Aspergillus brasiliensis ATCC 16404 strains was analysed using contact angle measurements. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00295-0DOI Listing
May 2020
0.592 Impact Factor

Synergistic effects of pomegranate and rosemary extracts in combination with antibiotics against antibiotic resistance and biofilm formation of Pseudomonas aeruginosa.

Braz J Microbiol 2020 May 12. Epub 2020 May 12.

Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University Giza, Giza, Egypt.

The combination of plant extract and antibiotic represents a template for developing of antibiofilm drugs. This study investigated the synergistic effects of pomegranate/rosemary/antibiotic combinations against antibiotic resistance and biofilm formation of Pseudomonas aeruginosa. The results showed that 17 (85%) of total P. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00284-3DOI Listing
May 2020
0.592 Impact Factor

Microbial communities in anaerobic digesters change over time and sampling depth.

Braz J Microbiol 2020 May 11. Epub 2020 May 11.

Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Instituto do Petróleo e dos Recursos Naturais, Porto Alegre, RS, Brazil.

Anaerobic digestion (AD) is a process resulting from the anaerobic metabolism of specific microorganisms that produce an eco-friendly type of energy and a stabilized soil fertilizer. We described the microbial communities and their changes in three depths of BioKöhler® biodigester, fed with cattle manure for 18 days, under anaerobic incubation at the psychrophilic temperature range (~ 20 °C). During the experiment, the maximum methane content in the raw biogas was 79. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00272-7DOI Listing

Feline sporotrichosis: a case series of itraconazole-resistant Sporothrix brasiliensis infection.

Braz J Microbiol 2020 May 9. Epub 2020 May 9.

Department of Veterinary Clinic, Faculty of Veterinary, Federal University of Pelotas, 1 Campus Universitário Capão do Leão, Pelotas/RS, Rio Grande do Sul, 96010-900, Brazil.

The treatment of feline sporotrichosis is a challenge for veterinary clinicians since refractory cases may occur, due either to patient and/or to pharmacological management errors or due to the development of antifungal resistance. Thus, we aimed to describe the therapeutic history of feline cases infected by itraconazole-resistant Sporothrix brasiliensis in an endemic region of Southern Brazil. Medical records of cats attended at the Veterinary Clinic Hospital (Pelotas/RS, Brazil) between 2016 and 2017 were reviewed. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00290-5DOI Listing

Yeast in plant phytotelmata: Is there a "core" community in different localities of rupestrian savannas of Brazil?

Braz J Microbiol 2020 May 8. Epub 2020 May 8.

Departamento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil.

Ephemeral microbial communities usually undergo priority effect and result in higher diversity with a few representatives of each species. Community structure of yeasts in bromeliad tanks was compared between two rupestrian savanna (Cerrado) areas in Brazil and to yeasts isolated from water holes in the same areas. Water samples were collected from 60 tanks of bromeliads Bromelia karatas and Encholirium sp. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00286-1DOI Listing

Human serum proteins bind to Sporothrix schenckii conidia with differential effects on phagocytosis.

Braz J Microbiol 2020 May 7. Epub 2020 May 7.

Unidad de Investigación en Medicina Experimental, Micología Básica, Facultad de Medicina, Universidad Nacional Autónoma de México, Hospital General de México "Dr. Eduardo Liceaga", Ciudad de México, Mexico.

Serum is an important source of proteins that interact with pathogens. Once bound to the cell surface, serum proteins can stimulate the innate immune system. The phagocytosis of Sporothrix schenckii conidia by human macrophages is activated through human serum opsonisation. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00276-3DOI Listing

Genome constellations of rotavirus a isolated from avian species in Brazil, 2008-2015.

Braz J Microbiol 2020 May 6. Epub 2020 May 6.

Department of Preventive Veterinary Medicine and Animal Health, School of Veterinary Medicine, University of São Paulo, Av. Prof. Dr. Orlando Marques de Paiva, 87, São Paulo, SP, CEP 05508-270, Brazil.

Rotaviruses are members of the family Reoviridae and are a common cause of acute diarrhea in many mammalian and avian species. They are non-enveloped icosahedral particles and their genome comprises 11 segments of double-stranded RNA, which encodes six structural proteins (VP1-4, VP6-7) and six nonstructural proteins (NSP1-6). Genotypes are defined based upon the diversity found in these genes and viral characterization plays a central role on epidemiological studies and prevention. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00259-4DOI Listing

Evaluation of glutamate dehydrogenase (GDH) and toxin A/B rapid tests for Clostridioides (prev. Clostridium) difficile diagnosis in a university hospital in Minas Gerais, Brazil.

Braz J Microbiol 2020 May 4. Epub 2020 May 4.

Veterinary School, Federal University of Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte, MG, 31.270-901, Brazil.

Clostridioides (Clostridium) difficile is responsible for most cases of nosocomial diarrhea and, despite the high prevalence of the disease worldwide, the best laboratory diagnostic approach to diagnose C. difficile infection (CDI) is a subject of ongoing debate. Although the use of multiple tests is recommended, the cost of these algorithms commonly exceeds the affordability in some countries. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00288-zDOI Listing

Characterization of Pneumocystis jirovecii pneumonia at three tertiary comprehensive hospitals in southern China.

Braz J Microbiol 2020 May 3. Epub 2020 May 3.

Jiangxi Provincial Key Laboratory of Medicine, Clinical Laboratory of the Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.

Due to the increasing use of immunosuppressant therapy, Pneumocystis jirovecii pneumonia (PJP) has become an emerging concern in human immunodeficiency virus (HIV)-negative patients. In this study, we conducted a retrospective study of 96 hospitalized patients with PJP from January 2015 to June 2019 at three tertiary comprehensive hospitals in Southern China. Information was collected regarding patient demographics, clinical manifestations, risk factors, laboratory analyses, radiological images, and treatment outcomes. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00277-2DOI Listing

Immunochromatographic test and ELISA for the detection of glutamate dehydrogenase (GDH) and A/B toxins as an alternative for the diagnosis of Clostridioides (Clostridium) difficile-associated diarrhea in foals and neonatal piglets.

Braz J Microbiol 2020 May 3. Epub 2020 May 3.

Veterinary School, Universidade Federal de Minas Gerais, Antônio Carlos Avenue, Belo Horizonte, MG, Brazil.

Considering the lack of studies evaluating the performance of commercially available methods for diagnosis of Clostridioides (Clostridium) difficile infection (CDI) in animals, the present study aimed to assess an immunochromatographic test for detection of glutamate dehydrogenase (GDH) and A/B toxins of C. difficile, also evaluated by an ELISA kit, in foals and neonatal piglets. Intestinal contents of 47 piglets and feces of 35 foals were tested to GDH antigen and A/B toxins in a lateral flow method (Ecodiagnostica, Brazil). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00275-4DOI Listing

Feline sporotrichosis in Asia.

Braz J Microbiol 2020 May 3. Epub 2020 May 3.

Department of Veterinary Dermatology, Nihon University College of Bioresource Sciences, 1866 Kameino, Fujisawa, Kanagawa, 252-0880, Japan.

Sporothrix schenckii sensu lato is currently recognized as a species complex with only Sporothrix brasiliensis, Sporothrix schenckii sensu stricto, Sporothrix globosa and Sporothrix pallida identified to cause disease in the cat. Feline sporotrichosis in Asia is mainly reported from Malaysia where a single clonal strain of clinical clade D, Sporothrix schenckii sensu stricto manifesting low susceptibility to major antifungal classes, has been identified as the agent of the disease. Sporothrix globosa has been identified to cause disease from a single cat in Japan while the specific species of agent has not been identified yet for the disease in Thailand. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00274-5DOI Listing

Aspergillus alliaceus infection fatally shifts Orobanche hormones and phenolic metabolism.

Authors:
Mehmet Aybeke

Braz J Microbiol 2020 May 3. Epub 2020 May 3.

Faculty of Science, Department of Biology, Balkan Campus, Trakya University, 22030, Edirne, Turkey.

In this study, the physio pathological effects of Aspergillus alliaceus (Aa, fungi, biocontrol agent) on Orobanche (parasitic plant) were investigated by hormone and phenolic substance tests. In experimental group, Orobanches were treated with the fungi, considering control group was fungus-free. Based on the hormonal tests, in the experimental group, salicylic acid (SA), jasmonic acid (JA), abscisic acid (ABA) and gibberellic acid (GA) levels significantly decreased, and only indole acetic acid (IAA) hormone levels were fairly higher than the control group. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00283-4DOI Listing

The unexplored bacterial lifestyle on leaf surface.

Braz J Microbiol 2020 May 3. Epub 2020 May 3.

College of Agriculture Luiz de Queiroz, University of São Paulo, Av. Pádua Dias, 11, Piracicaba, São Paulo, 13418-900, Brazil.

Social interactions impact microbial communities and these relationships are mediated by small molecules. The chemical ecology of bacteria on the phylloplane environment is still little explored. The harsh environmental conditions found on leaf surface require high metabolic performances of the bacteria in order to survive. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00287-0DOI Listing

Retrospective study of porcine circovirus 3 (PCV3) in swine tissue from Brazil (1967-2018).

Braz J Microbiol 2020 Apr 28. Epub 2020 Apr 28.

Department of Microbiology and Parasitology, Biomedical Institute, Fluminense Federal University, Rua Prof. Hernani Melo, Niterói, Rio de Janeiro, 24210-130, Brazil.

In this study, we report the molecular diagnosis and retrospective study of porcine circovirus 3 (PCV3) in frozen and formalin-fixed paraffin-embedded swine tissues (FFPE) collected from 1967 to 2018 in southeastern Brazil (Espírito Santo and Rio de Janeiro states). Frozen tissues from 35 pigs and FFPE tissues from 143 pigs were tested by nested PCR, targeting the PCV3 partial capsid gene. Bidirectional sequencing of 16 positive samples was performed, followed by sequence analysis and haplotype networks. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00281-6DOI Listing

A sensitive and rapid bacterial antibiotic susceptibility test method by surface enhanced Raman spectroscopy.

Braz J Microbiol 2020 Apr 28. Epub 2020 Apr 28.

Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, 130122, People's Republic of China.

This study aims to develop a rapid bacterial antibiotic susceptibility test (AST) method by Bacteria-aptamer@AgNPs-surface enhanced Raman spectroscopy (SERS) and further evaluate the influence of different antibiotics on the Raman intensity of bacteria. The Raman intensity of Escherichia coli O157:H7 (E. coli O157:H7) and Staphylococcus aureus (S. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00282-5DOI Listing

Technological properties of autochthonous Lactobacillus plantarum strains isolated from sucuk (Turkish dry-fermented sausage).

Braz J Microbiol 2020 Apr 27. Epub 2020 Apr 27.

Faculty of Agriculture, Food Engineering Department, Atatürk University, 25240, Erzurum, Turkey.

Purpose: Five Lactobacillus strains isolated from sucuk (Turkish dry-fermented sausage) were studied for their genetic and technological properties.

Methods: For genotypic identification, strains 16S rRNA gene sequences were used. To determine the antimicrobial activity of strains, seven foodborne pathogens were tested. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00262-9DOI Listing

Susceptibility and resistance of Sporothrix brasiliensis to branded and compounded itraconazole formulations.

Braz J Microbiol 2020 Apr 24. Epub 2020 Apr 24.

Departamento de Veterinária Preventiva, Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brazil.

Itraconazole is the first drug of choice for the treatment of sporotrichosis and it is available at different concentrations for veterinary patients. However, therapeutic failure has been reported, limiting clinical treatment. This study evaluated the in vitro efficacy of brand-name and compounded itraconazole formulations against Sporothrix brasiliensis and estimated the itraconazole content in each tested formulation. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00280-7DOI Listing

Antifungal compounds with anticancer potential from Trichoderma sp. P8BDA1F1, an endophytic fungus from Begonia venosa.

Braz J Microbiol 2020 Apr 24. Epub 2020 Apr 24.

Departamento de Ciências Exatas, Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz", CP 9, Piracicaba, SP, 13418-900, Brasil.

Fungi in the genus Trichoderma are notorious producers of secondary metabolites with diverse applications, such as antibacterial, antifungal, and plant growth-promoting properties. Peptaibols are linear peptides produced by such fungi, with more than 440 compounds described to date, including tricholongins, longibrachins, trichobrachins, and trichovirins. Peptaibols are synthesized by non-ribosomal peptide synthetases and they have several biological activities. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00270-9DOI Listing

Coagulase-negative staphylococci in outpatient routines: the implications of switching from CLSI to BrCAST/EUCAST guidelines.

Braz J Microbiol 2020 Apr 23. Epub 2020 Apr 23.

Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Brazil.

Coagulase-negative staphylococci (CoNS) are frequently isolated in clinical specimens and are important reservoirs of resistance genes. In 2019, the Brazilian government set the BrCAST/EUCAST (Brazilian Committee on Antimicrobial Susceptibility Testing) guidelines as the national standard, resulting in changes in the interpretation of CoNS susceptibility tests. From outpatients, disk-diffusion susceptibility of 65 CoNS cultures were evaluated and compared using classification criteria from both CLSI and BrCAST/EUCAST. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00278-1DOI Listing

Simultaneous hydrogen production and decolorization of denim textile wastewater: kinetics of decolorizing of indigo dye by bacterial and fungal strains.

Braz J Microbiol 2020 Jun 22;51(2):701-709. Epub 2020 Apr 22.

DICIVA, Universidad de Guanajuato CIS, Ex Hacienda El Copal Km. 9, Carretera Irapuato-Silao, Irapuato, Guanajuato, Mexico.

This study proposes the treatment and valorization of denim textile effluents through a fermentative hydrogen production process. Also, the study presents the decolorizing capabilities of bacterial and fungal isolates obtained from the fermented textile effluents. The maximum hydrogen production rate was 0. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-019-00157-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7203402PMC

Physiological and genetic characterization of indigenous Saccharomyces cerevisiae for potential use in productions of fermented maize-based-beverages.

Braz J Microbiol 2020 Apr 21. Epub 2020 Apr 21.

Biology Department, Federal University of Lavras, Campus Universitário, 3037, Lavras, MG, CEP 37200-000, Brazil.

The Saccharomyces cerevisiae has been used for many years in the elaboration of food and beverage products, mainly associated with fermentation processes. The objective of this study was to characterize different indigenous S. cerevisiae strains and guide the notable strains for potential use in productions of fermented maize-based beverages. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00271-8DOI Listing

High prevalence of subclinical paratuberculosis in buffaloes (Bubalus bubalis) in Maranhão, Brazil.

Braz J Microbiol 2020 Apr 14. Epub 2020 Apr 14.

Department of Veterinary Medicine, Rural Federal University of Pernambuco, Recife, PE, Brazil.

Paratuberculosis is an infectious, chronic, and incurable disease that affects ruminants, causing enteritis and chronic granulomatous lymphadenitis, characterized by malabsorption syndrome, its agent is the Mycobacterium avium subsp. paratuberculosis (MAP). Thus, the objective of this work was to identify and characterize MAP in buffalo herds slaughtered in Baixada Maranhense region. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00267-4DOI Listing

Comparison of stress conditions to induce viable but non-cultivable state in Salmonella.

Braz J Microbiol 2020 Apr 14. Epub 2020 Apr 14.

Department of Microbiology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil.

Salmonella can enter on the viable but non-culturable state (VBNC), characterized by the loss of ability to grow in routine culture media hindering detection by conventional methods and underestimation of the pathogen. Despite advances in research done so far, studies comparing conditions that lead Salmonella into the VBNC state are scarce. The main objective of this study was to evaluate different stresses to induce Salmonella to the VNBC state. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00261-wDOI Listing

Citrobacter diversus-derived keratinases and their potential application as detergent-compatible cloth-cleaning agents.

Braz J Microbiol 2020 Apr 14. Epub 2020 Apr 14.

Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", R/ Cristóvão Colombo, 2265. Jd Nazareth, Ibilce-Unesp, São José do Rio Preto, São Paulo, Brazil.

Currently, poultry farming is one of the sectors that have a significant impact on the global economy. In recent years, there has been an increase in the production of broilers, inflicting this segment of the industry to generate tons of keratin due to huge disposal of chicken feathers. This points to the need to degrade these chicken feathers, as they have emerged as a major threat to the environment. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00268-3DOI Listing

Fecal cultivable aerobic microbiota of dairy cows and calves acting as reservoir of clinically relevant antimicrobial resistance genes.

Braz J Microbiol 2020 Apr 3. Epub 2020 Apr 3.

Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, Brazil.

Antimicrobial resistance has become a global threat to public health since multidrug-resistant (MDR) bacteria have been reported worldwide carrying different antimicrobial resistance genes (ARGs), and animals have been described as a reservoir of ARGs. The presence of antimicrobial-resistant bacteria and ARGs in the food matrix is a risk to public health. This study aimed to research the presence of clinically relevant ARGs for important antimicrobials and genetic elements in fecal samples from dairy cows and calves on a Brazilian farm. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00265-6DOI Listing

Correction to: Genotypic and phenotypic changes of Staphylococcus epidermidis during relapse episodes in prosthetic joint infections.

Braz J Microbiol 2020 06;51(2):847

Microbiology and Immunology Departments of Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala S/N, Col. Santo Tomas, Mexico City, Mexico.

In the original publication of the article, the authorship was published incorrectly. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00257-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7203256PMC
June 2020
0.592 Impact Factor

Correction to: Sequence analysis of nucleoprotein gene reveals the co-circulation of lineages and sublineages of rabies virus in herbivorous in Rio Grande do Sul state, Brazil.

Braz J Microbiol 2020 06;51(2):849-850

Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, prédio 63A, Santa Maria, Rio Grande do Sul, 97105-900, Brazil.

Discussion section, 9th paragraph. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00258-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7203370PMC

Antimicrobial activity of protein-containing fractions isolated from Lactobacillus plantarum NRRL B-4496 culture.

Braz J Microbiol 2020 Mar 30. Epub 2020 Mar 30.

Chemical and Food Engineering Department, Universidad de las Americas Puebla, Sta. Catarina Martir, 72810, Cholula, Puebla, Mexico.

The interest in lactic acid bacteria, including Lactobacillus plantarum NRRL B-4496, has increased in recent years as bio-preservatives, due to the production of secondary metabolites capable of inhibiting pathogenic bacteria. The objectives of this study were to evaluate the antimicrobial activity, cytotoxicity and the anti-inflammatory response of L. plantarum NRRL B-4496 cell-free supernatant (CFS). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00266-5DOI Listing

Phylogenetic analysis of the whole genome sequence of a dog lineage rabies virus detected from cattle in eastern China, 2019.

Braz J Microbiol 2020 Mar 30. Epub 2020 Mar 30.

Dairy Cattle Research Center, Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China.

Rabies is an important zoonosis worldwide, and this disease is caused by the rabies virus. Dogs and bat are the major hosts of rabies virus; however, many animals could infect with the rabies virus. By biting or scratching by an infected animal, rabies virus can be transmitted to cattle which is an important domestic animal in animal husbandry. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00264-7DOI Listing

Metagenomic characterization of bacterial biofilm in four food processing plants in Colombia.

Braz J Microbiol 2020 Mar 27. Epub 2020 Mar 27.

Colombian Institute of Tropical Medicine, CES University, Carrera 43A # 52 Sur 99, Sabaneta, Colombia.

Bacteria inside biofilms are more persistent and resistant to stress conditions found in the production environment of food processing plants, thus representing a constant risk for product safety and quality. Therefore, the aim of this study was to characterize, using 16S rRNA sequencing, the bacterial communities from biofilms found in four food processing plants (P1, P2, P3, and P4). In total, 50 samples from these four processing plants were taken after cleaning and disinfection processes. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00260-xDOI Listing

Optimization of media composition and growth conditions for production of milk-clotting protease (MCP) from Aspergillus oryzae DRDFS13 under solid-state fermentation.

Braz J Microbiol 2020 Jun 24;51(2):571-584. Epub 2020 Mar 24.

Microbial, Cellular and Molecular Biology Department, Addis Ababa University, Addis Ababa, Ethiopia.

This study reports the optimization of milk-clotting protease production from Aspergillus oryzae DRDFS13 under solid-state fermentation (SSF) in both one-variable-at-a-time and response surface methodology (RSM). The production and optimization of milk-clotting protease obtained from Aspergillus oryzae DRDFS13 under solid-state fermentation (SSF) using different agro-industrial wastes as solid substrates were studied. The agro-industrial wastes used included wheat bran, rice bran, pea bran, and grass pea bran. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00243-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7203387PMC

Evaluation of the susceptibility test of polymyxin B using the commercial test Policimbac®.

Braz J Microbiol 2020 Mar 20. Epub 2020 Mar 20.

Laboratório de Pesquisa em Resistência Bacteriana-LABRESIS, Centro de Pesquisa Experimental, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, RS, Brazil.

Broth microdilution (BMD), the reference method to determine bacterial susceptibility to polymyxins, is a laborious and time-consuming technique. Policimbac® is a commercial test panel which uses lyophilized polymyxin B to determine the minimum inhibitory concentration for Gram-negative isolates. This study evaluated the performance of Policimbac® in comparison with BMD for 110 isolates. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s42770-020-00246-9DOI Listing