Lethality of cytochalasin B and other compounds isolated from fungus Aspergillus sp. (Trichocomaceae) endophyte of Bauhinia guianensis (Fabaceae).
Authors: Feitosa AO, Dias AC, Ramos GD, Bitencourt HR, Siqueira JE, Marinho PS, Barison A, Ocampos FM, Marinho AM Abstract Endophytic fungi are fungi that colonize internal tissues of plants; several biologically active compounds have been isolated from these fungi. There are few studies of compounds isolated from endophytic fungi of Amazon plants. Thus, this study aimed the isolation and structural identification of ergosterol (1), ergosterol peroxide (2), mevalonolactone (3), cytochalasin B (4) and cytochalasin H (5) from Aspergillus sp. EJC 04, an endophytic fungus from Bauhinia guianensis. The cytochalasin B (4...
Source: Revista Argentina de Microbiologia - August 30, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Economical fermentation media for the production of a whole cell catalyst for the treatment of Cr(VI)-containing wastewaters.
Authors: Alessandrello MJ, Vullo DL Abstract The biotechnology sector is continually seeking sustainable and more economical bioprocesses. Fermentation media produced with cheap components or wastes reduce production costs. Moreover, if wastes are used, they contribute to avoid environmental pollution. In this work, microbial growth media based on molasses or acidified glycerol as carbon sources and fertilizer as nitrogen source were tested for the production of a whole-cell catalyst that could be used in Cr(VI)-containing wastewater treatments. Results showed that the highest biomass production yield was obtained ...
Source: Revista Argentina de Microbiologia - August 30, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Analysis of 117 episodes of enterococcal bacteremia: Study of epidemiology, microbiology and antimicrobial susceptibility].
We describe the episodes of enterococcal bacteremia in adult patients recorded at our hospital. Between January 2000 and December 2013, 117 episodes were analyzed. Sixty one percent (61%) of the patients were male and 39% female. The mean age was 68. Predisposing factors were present in 91% of patients. The primary source of infection was intraabdominal. Enterococcus faecalis was responsible for 65% of the cases; E. faecium for 28%; and other species for 7%. Thirty four percent (34%) of cases were polymicrobial bacteremia. All E. faecalis isolates were susceptible to ampicillin and vancomycin. Eighty eight percent (88%) of...
Source: Revista Argentina de Microbiologia - August 30, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Virulence of Sporothrix globosa in murine models].
CONCLUSIONS: The S. globosa strain did not present any virulence enough to cause disease at 0.5 and 4.0 McFarland concentration inoculum when inoculated in both intraperitoneally and subcutaneously, in murine models. PMID: 27566945 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - August 28, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Performance evaluation of Rapid ™ Yeast Plus (Remel) system from two different culture media].
[Performance evaluation of Rapid™ Yeast Plus (Remel) system from two different culture media]. Rev Argent Microbiol. 2016 Aug 23; Authors: Romeo AM, Snitman GV, Marucco AP, Ponce GD, Cataldi SP, Guelfand LI, Arechavala A, integrantes de la Red de Micología-Ciudad Autónoma de Buenos Aires Abstract Within the genus Candida, Candida albicans is the most commonly isolated species from clinical samples. Due to the emergence of other species which can show a higher index of antifungal resistance, a fast identification of these species is necessary. The aim of this work was to evaluate the...
Source: Revista Argentina de Microbiologia - August 28, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Zika virus: chronicle of an "unexpected" pandemic].
[Zika virus: chronicle of an "unexpected" pandemic]. Rev Argent Microbiol. 2016 Apr-Jun;48(2):97-99 Authors: Minassian ML PMID: 27377478 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - July 7, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Amino acid substitution in Cryptococcus neoformans lanosterol 14-α-demethylase involved in fluconazole resistance in clinical isolates.
Amino acid substitution in Cryptococcus neoformans lanosterol 14-α-demethylase involved in fluconazole resistance in clinical isolates. Rev Argent Microbiol. 2016 Jun 13; Authors: Bosco-Borgeat ME, Mazza M, Taverna CG, Córdoba S, Murisengo OA, Vivot W, Davel G Abstract The molecular basis of fluconazole resistance in Cryptococcus neoformans has been poorly studied. A common azole resistance mechanism in Candida species is the acquisition of point mutations in the ERG11 gene encoding the enzyme lanosterol 14-α-demethylase, target of the azole class of drugs. In C. neoformans only two ...
Source: Revista Argentina de Microbiologia - June 19, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

LED fluorescence microscopy in the diagnosis of tuberculosis: Fading and restaining of smears for external quality assessment.
In conclusion, the practice of freezing slides until they are viewed should be discouraged as it has a negative effect on blinded rechecking by reducing reading concordance after restaining. Specimen quality should be considered when interpreting FM-EQA results. PMID: 27291283 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - June 15, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Bibliometric analysis of scientific literature on intestinal parasites in Argentina during the period 1985-2014.
Authors: Basualdo JA, Grenóvero MS, Bertucci E, Molina NB Abstract The study of scientific production is a good indicator of the progress in research and knowledge generation. Bibliometrics is a scientific discipline that uses a set of indicators to quantitatively express the bibliographic characteristics of scientific publications. The scientific literature on the epidemiology of intestinal parasites in Argentina is scattered in numerous sources, hindering access and visibility to the scientific community. Our purpose was to perform a quantitative, bibliometric study of the scientific literature on intestin...
Source: Revista Argentina de Microbiologia - June 12, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

New virus discovered in blood supply: Human hepegivirus-1 (HHpgV-1).
Authors: Cuestas ML PMID: 27268134 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - June 10, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Biomineralization of copper in Candida fukuyamaensis RCL-3].
This report revealed that mineralization would be a mechanism used by this yeast for copper bioremediation. PMID: 27237424 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - June 1, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Interlaboratory test: Isolation of Mycobacterium bovis from granulomatous lesions in bovine].
Authors: Garbaccio S, Barandiaran S, Fernandez A, Macias A, Magnano G, Martinez Vivot M, Peyrú M, Cataldi A Abstract Mycobacterium bovis is the causative agent of bovine tuberculosis. The diagnostic laboratory confirmation is made through bacterial isolation. The aim of interlaboratory tests is to assess the performance of each participant in comparison with other of similar capacities. The test objective was to determine the efficiency of isolation of M. bovis. Four laboratories were part of the test and processed 25 blind tissue samples from granulomatous lesions and with previous M. bovis isolation. The l...
Source: Revista Argentina de Microbiologia - June 1, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Antimicrobial activity of chitosan coatings and films against Listeria monocytogenes on black radish.
Authors: Jovanović GD, Klaus AS, Nikšić MP Abstract The antibacterial activity of chitosan coatings prepared with acetic or lactic acid, as well as of composite chitosan-gelatin films prepared with essential oils, was evaluated in fresh shredded black radish samples inoculated with Listeria monocytogenes ATCC 19115 and L. monocytogenes ATCC 19112 during seven days of storage at 4°C. The chitosan coating prepared with acetic acid showed the most effective antibacterial activity. All tested formulations of chitosan films exhibited strong antimicrobial activity on the growth of L. monocytogenes on black r...
Source: Revista Argentina de Microbiologia - June 1, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Identification of Alternaria botrytis (Preuss) Woudenberg & Crous].
[Identification of Alternaria botrytis (Preuss) Woudenberg & Crous]. Rev Argent Microbiol. 2016 May 19; Authors: Cruz Choappa RM, Piontelli Laforet E, Vieille Oyarzo P, Carvajal Silva L PMID: 27212055 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - May 25, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Epstein-Barr virus load in transplant patients: Early detection of post-transplant lymphoproliferative disorders.
Authors: Fellner MD, Durand KA, Solernou V, Bosaleh A, Balbarrey Z, García de Dávila MT, Rodríguez M, Irazu L, Alonio LV, Picconi MA Abstract High levels of circulating EBV load are used as a marker of post-transplant lymphoproliferative disorders (PTLD). There is no consensus regarding the threshold level indicative of an increase in peripheral EBV DNA. The aim of the study was to clinically validate a developed EBV quantification assay for early PTLD detection. Transversal study: paired peripheral blood mononuclear cells (PBMC), plasma and oropharyngeal lymphoid tissue (OLT) from children und...
Source: Revista Argentina de Microbiologia - May 11, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Novel bioassay using Bacillus megaterium to detect tetracycline in milk.
Authors: Tumini M, Nagel OG, Molina P, Althaus RL Abstract Tetracyclines are used for the prevention and control of dairy cattle diseases. Residues of these drugs can be excreted into milk. Thus, the aim of this study was to develop a microbiological method using Bacillus megaterium to detect tetracyclines (chlortetracycline, oxytetracycline and tetracycline) in milk. In order to approximate the limits of detection of the bioassay to the Maximum Residue Limit (100μg/l) for milk tetracycline, different concentrations of chloramphenicol (0, 1000, 1500 and 2000μg/l) were tested. The detection limits calculated w...
Source: Revista Argentina de Microbiologia - May 2, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Assessment of transmammary transmission of Trichinella patagoniensis in BALB/c mice].
Authors: Fariña FA, Pasqualetti MI, Cardillo NM, Aronowicz T, Ercole M, Krivokapich SJ, Ribicich MM Abstract Since 1916 to date, it has been suspected that vertical transmission of parasites from the genus Trichinella could occur in pregnant or lactating women during the parenteral phase of infection. The aim of the present study was to evaluate the transmammary transmission of T. patagoniensis in BALB/c mice. Twenty 7-week-old BALB/c mice were distributed into two groups of 10 individuals each, depending on the time of gestation when they were infected, 15 or 18 days after detection of the vaginal plug. Eac...
Source: Revista Argentina de Microbiologia - April 20, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Psoas abscess caused by Staphylococcus lugdunensis].
Authors: Tamargo Delpón M, Demelo-Rodríguez P, Cano Ballesteros JC, Vela de la Cruz L Abstract Staphylococcus lugdunensis is a coagulase-negative staphylococcus of growing importance and atypical behavior. The infections caused by this microorganism are becoming more frequent, having a broader spectrum. Psoas abscesses caused by this germ are rare, with few cases reported in the literature. In this work, we present a case of a psoas abscess caused by S. lugdunensis in a patient suffering from diabetes mellitus and rheumatoid arthritis, which was treated with intravenous cloxacillin with a good outcome...
Source: Revista Argentina de Microbiologia - April 19, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Endophytic fungi from selected varieties of soybean (Glycine max L. Merr.) and corn (Zea mays L.) grown in an agricultural area of Argentina.
Authors: Russo ML, Pelizza SA, Cabello MN, Stenglein SA, Vianna MF, Scorsetti AC Abstract Endophytic fungi are ubiquitous and live within host plants without causing any noticeable symptoms of disease. Little is known about the diversity and function of fungal endophytes in plants, particularly in economically important species. The aim of this study was to determine the identity and diversity of endophytic fungi in leaves, stems and roots of soybean and corn plants and to determine their infection frequencies. Plants were collected in six areas of the provinces of Buenos Aires and Entre Ríos (Argentina) two...
Source: Revista Argentina de Microbiologia - April 7, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Hemolytic uremic syndrome in urban areas].
Authors: Bentancor A PMID: 27017446 [PubMed - in process] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - March 29, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Arcobacter butzleri survives within trophozoite of Acanthamoeba castellanii.
Authors: Villanueva MP, Medina G, Fernández H Abstract The survival of three Arcobacter butzleri strains inside Acanthamoeba castellanii was assessed using axenic cultures of A. castellanii that were inoculated with the tested strains and incubated at 26°C under aerobic conditions for 240h. The behavior of bacteria in contact with amoebae was monitored using phase contrast microscopy. The bacterial survival rate within amoebae was assessed through counting colony forming units, using the gentamicin protection assay. All A. butzleri strains were able to survive during 240h within the amoebae, thus suggest...
Source: Revista Argentina de Microbiologia - March 15, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Epidemiology of caprine and ovine brucellosis in Formosa province, Argentina].
Authors: Russo AM, Mancebo OA, Monzón CM, Gait JJ, Casco RD, Torioni de Echaide SM Abstract An epidemiological study of brucellosis was carried out in 516 goats and mixed flocks (goat/sheep) from the three agro-ecological regions of Formosa province, Argentina. Serum samples from a total of 25401 goats and 2453 sheeps were analyzed using buffered plate agglutination test (BPAT) and complement fixation test (CFT). Bacteriological and PCR analyses on milk samples from goats in three flocks with a history of brucellosis and recent abortions were also performed. Brucellosis was detected in four of the nine depar...
Source: Revista Argentina de Microbiologia - March 14, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Detection of Brachyspira pilosicoli and other Brachyspira species in Argentine poultry farms].
Authors: Illanes NV, Tamiozzo PJ, Cabral A, Bertone J, Romanini S, Yaciuk R, Vázquez M, Pelliza BR Abstract Some species of the genus Brachyspira such as Brachyspira pilosicoli, Brachyspira intermedia and Brachyspira alvinipulli are pathogenic species capable of producing disease in laying hens. In our country, the presence of B. pilosicoli and other species of Brachyspira has been reported in pigs and dogs but there is no record of their presence in poultry. Fecal and cecal content samples from 34 laying hens of 4, 12 and 24 months of age from two farms were analyzed by isolation, biochemical tests and PCR....
Source: Revista Argentina de Microbiologia - March 11, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

An acidic sphingomyelinase Type C activity from Mycobacterium tuberculosis.
Authors: Castro-Garza J, González-Salazar F, Quinn FD, Karls RK, De La Garza-Salinas LH, Guzmán-de la Garza FJ, Vargas-Villarreal J Abstract Sphingomyelinases (SMases) catalyze the hydrolysis of sphingomyelin to ceramide and phosphorylcholine. Sphingolipids are recognized as diverse and dynamic regulators of a multitude of cellular processes mediating cell cycle control, differentiation, stress response, cell migration, adhesion, and apoptosis. Bacterial SMases are virulence factors for several species of pathogens. Whole cell extracts of Mycobacterium tuberculosis strains H37Rv and CDC1551 were assay...
Source: Revista Argentina de Microbiologia - March 9, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Prevalence and antibiotic susceptibility of coagulase-negative Staphylococcus species from bovine subclinical mastitis in dairy herds in the central region of Argentina.
In this study, we identified 219 CNS isolates at species level by PCR-restriction fragment length polymorphism of the groELgene. Staphylococcus chromogenes (46.6%) and Staphylococcus haemolyticus (32%) were the most prevalent species. A minimum of three different CNS species were present in 41.2% of the herds. S. chromogenes was isolated from most of the herds (86.3%), whereas S. haemolyticus was isolated from 66.7% of them. The broth microdilution method was used to test in vitro antimicrobial susceptibility. Resistance to a single compound or two related compounds was expressed in 43.8% of the isolates. S. chromogenes an...
Source: Revista Argentina de Microbiologia - March 6, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Diagnosis of a case of scabies in the city of Buenos Aires].
Authors: Menghi CI, Arias LE, Gatta CL PMID: 26922470 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - February 29, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Prevalence and antifungal susceptibility of Candida albicans and its related species Candida dubliniensis and Candida africana isolated from vulvovaginal samples in a hospital of Argentina.
Authors: Theill L, Dudiuk C, Morano S, Gamarra S, Nardin ME, Méndez E, Garcia-Effron G Abstract Candida africana taxonomical status is controversial. It was proposed as a separate species within the Candida albicans species complex; however, phylogenetic analyses suggested that it is an unusual variety of C. albicans. The prevalence of C. albicans-related species (Candida dubliniensis and C. africana) as vulvovaginal pathogens is not known in Argentina. Moreover, data on antifungal susceptibility of isolates causing vulvovaginal candidiasis is scarce. The aims of this study were to establish the prevalence o...
Source: Revista Argentina de Microbiologia - February 29, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

PCR-based method for the rapid identification of astaxanthin-accumulating yeasts (Phaffia spp.).
Authors: Colabella F, Libkind D Abstract It has been recently found that the natural distribution, habitat, and genetic diversity of astaxanthin-producing yeasts (i.e. Phaffia rhodozyma, synonym Xanthophyllomyces dendrorhous) is much greater than previously thought. P. rhodozyma is biotechnologically exploited due to its ability to produce the carotenoid pigment astaxanthin and thus, it is used as a natural source of this pigment for aquaculture. P. rhodozyma was also capable of synthesizing the potent UVB sunscreen mycosporine-glutaminol-glucoside (MGG). Therefore, further environmental studies are needed to eluci...
Source: Revista Argentina de Microbiologia - February 29, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Effect of different polyphenol sources on the efficiency of ellagic acid release by Aspergillus niger.
Authors: Sepúlveda L, de la Cruz R, Buenrostro JJ, Ascacio-Valdés JA, Aguilera-Carbó AF, Prado A, Rodríguez-Herrera R, Aguilar CN Abstract Fungal hydrolysis of ellagitannins produces hexahydroxydiphenic acid, which is considered an intermediate molecule in ellagic acid release. Ellagic acid has important and desirable beneficial health properties. The aim of this work was to identify the effect of different sources of ellagitannins on the efficiency of ellagic acid release by Aspergillus niger. Three strains of A. niger (GH1, PSH and HT4) were assessed for ellagic acid release from diffe...
Source: Revista Argentina de Microbiologia - February 27, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Genotype, antifungal susceptibility, and biofilm formation of Trichosporon asahii isolated from the urine of hospitalized patients.
This study reports that the microorganisms isolated here as T. asahii are agents of nosocomial urinary tract infections. Furthermore, the IGS1 region can be considered a new epidemiological tool for genotyping T. asahii isolates. The least common genotypes reported in this study can be related to local epidemiological trends. PMID: 26916812 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - February 27, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Cystic Fibrosis Cloud database: An information system for storage and management of clinical and microbiological data of cystic fibrosis patients].
Authors: Prieto CI, Palau MJ, Martina P, Achiary C, Achiary A, Bettiol M, Montanaro P, Cazzola ML, Leguizamón M, Massillo C, Figoli C, Valeiras B, Perez S, Rentería F, Diez G, Yantorno OM, Bosch A Abstract The epidemiological and clinical management of cystic fibrosis (CF) patients suffering from acute pulmonary exacerbations or chronic lung infections demands continuous updating of medical and microbiological processes associated with the constant evolution of pathogens during host colonization. In order to monitor the dynamics of these processes, it is essential to have expert systems capable of sto...
Source: Revista Argentina de Microbiologia - February 21, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[In vitro activity of ampicillin-ceftriaxone against Enterococcus faecalis isolates recovered from invasive infections].
Authors: Burguer Moreira N, Nastro M, Vay C, Famiglietti Á, Rodríguez CH Abstract In vitro activity of the combination of ampicillin- ceftriaxone against 30 Enterococcus faecalis isolates recovered from invasive infections in patients admitted to Hospital de Clínicas José de San Martin in the city of Buenos Aires was assessed. Ampicillin- ceftriaxone synergies were determined by microdilution in Müeller-Hinton (MH) broth with and without subinhibitory concentrations of ceftriaxone. Synergy was detected in 22/30 isolates. A decrease in both minimum inhibitory concentration (MIC) and ...
Source: Revista Argentina de Microbiologia - February 11, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Study of infestation of dogs with Echinococcus granulosus in the province of La Rioja, Argentina].
Authors: Amaya JC, Moreno N, Salmaso N, Bazan E, Ricoy G, Córdoba P, Santillan GI Abstract This work was conducted in the province of La Rioja, located in northwestern Argentina. The aim of this study was to estimate the percentage of dog feces showing the presence of antigens of Echinococcus sp in different regions of the province. A total of 269 samples of dried canine stool were taken, which were analyzed by the copro-ELISA technique. The most affected area was zone IV, which had 30.5% of positive samples. Zone I corresponding to the Capital Department of the province had 12% of positivity. In other areas...
Source: Revista Argentina de Microbiologia - January 20, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Expression and refolding of the protective antigen of Bacillus anthracis: A model for high-throughput screening of antigenic recombinant protein refolding.
In this study a high level of PA was obtained in recombinant Escherichia coli. The protein was initially accumulated in inclusion bodies, which facilitated its efficient purification by simple washing steps; however, it could not be recognized by specific antibodies. Refolding conditions were subsequently analyzed in a high-throughput manner that enabled nearly a hundred different conditions to be tested simultaneously. The recovery of the ability of PA to be recognized by antibodies was screened by dot blot using a coefficient that provided a measure of properly refolded protein levels with a high degree of discrimination...
Source: Revista Argentina de Microbiologia - January 20, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

First record of Talaromyces udagawae in soil related to decomposing human remains in Argentina.
Authors: Tranchida MC, Centeno ND, Stenglein SA, Cabello MN Abstract The morphologic features of Talaromyces udagawae Stolk and Samson are here described and illustrated. This teleomorphic Ascomycota fungus was isolated from soil obtained in Buenos Aires province (Argentina) from beneath a human cadaver in an advanced state of decomposition. After washing and serial dilution of the soil along with moist-chamber techniques for fungal cultivation, T. udagawae formed very restricted colonies of bright yellow color on different growth media with 8-ascospored asci. The ascospores were ellipsoidal and ornamented. The ana...
Source: Revista Argentina de Microbiologia - January 17, 2016 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Sliding motiliy in Mycobacterium chubuense].
Authors: Oriani AS, Gentili AR, Baldini MD PMID: 26702767 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - December 27, 2015 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

The decrease in the population of Gluconacetobacter diazotrophicus in sugarcane after nitrogen fertilization is related to plant physiology in split root experiments.
Authors: Rodríguez-Andrade O, Fuentes-Ramírez LE, Morales-García YE, Molina-Romero D, Bustillos-Cristales MR, Martínez-Contreras RD, Muñoz-Rojas J Abstract It has been established that a decrease in the population of Gluconacetobacter diazotrophicus associated with sugarcane occurs after nitrogen fertilization. This fact could be due to a direct influence of NH4NO3 on bacterial cells or to changes in plant physiology after fertilizer addition, affecting bacterial establishment. In this work, we observed that survival of G. diazotrophicus was directly influenced when 44.8mM of NH4N...
Source: Revista Argentina de Microbiologia - December 16, 2015 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[MERS-CoV, transmission and the role of new host species].
Authors: Bratanich A PMID: 26652263 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - December 16, 2015 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Anaerobiospirillum thomasii bacteremia with fatal outcome].
We present here the first case of fatal A. thomasii bacteremia in an alcoholic patient. PMID: 26654699 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - December 16, 2015 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Controlling Rotavirus-associated diarrhea: Could single-domain antibody fragments make the difference?
Authors: Maffey L, Vega CG, Parreño V, Garaicoechea L Abstract Group A Rotavirus (RVA) remains a leading cause of severe diarrhea and child mortality. The variable domain of camelid heavy chain antibodies (VHH) display potent antigen-binding capacity, have low production costs and are suitable for oral therapies. Two sets of anti-RVA VHHs have been developed: ARP1-ARP3; 2KD1-3B2. Here, we explore the potential of both sets as a prevention strategy complementary to vaccination and a treatment option against RVA-associated diarrhea in endangered populations. Both sets have been expressed in multiple production...
Source: Revista Argentina de Microbiologia - December 16, 2015 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Control of agitation and aeration rates in the production of surfactin in foam overflowing fed-batch culture with industrial fermentation.
In this study, the agitation and aeration rates were found to have relationships with foam formation and surfactin enrichment. A maximum surfactin concentration of 4.7g/l of foam was obtained after 21h of culture with an agitation rate of 150rpm and an aeration rate of 1vvm in fed-batch culture. By controlling the foam overflow rate (fout) of a fed-batch culture, surfactin concentration in the foam was continuously maintained above 4g/l. PMID: 26655454 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - December 16, 2015 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Human papillomavirus detection in Corrientes, Argentina: High prevalence of type 58 and its phylodynamics.
Authors: Marín HM, Torres C, Deluca GD, Mbayed VA Abstract Human papillomavirus (HPV) has the highest mortality rate due to cervical cancer in Northeastern Argentina. The aim of this work was to detect and characterize HPV in samples from the Province of Corrientes, Argentina. HPV detection and typing was performed using PCR-RFLP on samples with different cervical lesions (n=255). Seventeen viruses typified as HPV-58 were sequenced (E6 and E7 genes) and mutations were analyzed. HPV DNA was detected in 56.1% of the cervical lesions (143/255). Twenty-two different HPV types were detected. The type most frequen...
Source: Revista Argentina de Microbiologia - December 12, 2015 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research