Debaryomyces hansenii F39A as biosorbent for textile dye removal.
Authors: Ruscasso F, Bezus B, Garmendia G, Vero S, Curutchet G, Cavello I, Cavalitto S Abstract Many industries generate a considerable amount of wastewater containing toxic and recalcitrant dyes. The main objective of this research was to examine the biosorption capacity of Reactive Blue 19 and Reactive Red 141 by the Antarctic yeast Debaryomyces hansenii F39A biomass. Some variables, including pH, dye concentration, amount of adsorbent and contact time, were studied. The equilibrium sorption capacity of the biomass increased with increasing initial dye concentration up to 350mg/l. Experimental isotherms fit the L...
Source: Revista Argentina de Microbiologia - January 21, 2021 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Virulence genes and antimicrobial susceptibility in Salmonellaenterica serotypes isolated from swine production in Argentina.
Authors: Joaquim P, Herrera M, Dupuis A, Chacana P Abstract Salmonella is a worldwide-distributed pathogen that affects both humans and animals and is usually associated with intensive animal production such as poultry and swine. This bacterium carries different virulence genes, whose expression favors its interaction with the host and may influence the course of the infection. Extended usage of antibiotics for metaphylaxis or prophylaxis and as growth promoters favors the emergence of multiresistant Salmonella strains. The aim of this work was to assess the association between the presence of virulence-associated ...
Source: Revista Argentina de Microbiologia - January 15, 2021 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Intestinal parasites in child and youth populations of Argentina: Environmental factors determining geographic distribution.
Authors: Cociancic P, Torrusio SE, Garraza M, Zonta ML, Navone GT Abstract The transmission of intestinal parasites is generally considered to be "mediated by the environment" which suggests that they are particularly sensitive to the changes that occur in it. The aim of the present study was to evaluate the environmental variables that act as risk factors for intestinal parasitosis in children and youths in Argentina. The association between environmental variables related to temperature, precipitation and soil and parasitosis found in children and youths from different provinces was evaluated, including...
Source: Revista Argentina de Microbiologia - January 9, 2021 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Analysis of the diversity of Actinomyces/Actinotignum clinical isolates in a university hospital].
Authors: Barberis C, Ledesma M, Álvarez C, Famiglietti A, Almuzara M, Vay C Abstract Actinomyces and related genera are grampositive bacilli, opportunistic pathogens, which have been mainly involved in endogenous infections. However, due to the complexity in identifying them for most clinical laboratories, there is scant knowledge about their real clinical significance. In this work, 166 isolates of 13 different species of Actinomyces/Actinotignum species recovered from clinical samples of patients treated in a university hospital were studied. The identification was performed by MALDI-TOF MS and molecular i...
Source: Revista Argentina de Microbiologia - January 8, 2021 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Clinical and microbiological characteristics of bloodstream infections in adult neutropenic patients].
In conclusion BI of the neutropenic patients where most frequents within patients with HN, GNB were the main microbiological isolates. High mortality was observed in neutropenic patients with BI. PMID: 33388181 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - January 5, 2021 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Ureaplasma diversum and Ureaplasma sp. in nasal cavity of pigs: Distribution among herds and individual frequency based on pooled samples.
Authors: Seitz J, Vicharelli G, García V, Vissio C, Estanguet A, Parada J, Carranza A, Di Cola G, Tamiozzo P Abstract The role of Ureaplasma diversum in the porcine respiratory disease complex (PRDC), its circulation among herds and prevalence in live pigs is unknown; thus, the objectives of this study were: to determine the presence of U. diversum in indoor intensive pig herds and to determine the individual frequency of pigs with U. diversum from pooled samples. A cross sectional study was carried out in 16 indoor intensive herds from Córdoba and La Pampa provinces, collecting eight nasal swabs spec...
Source: Revista Argentina de Microbiologia - January 3, 2021 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Growth characterization and predictive behavior of Eurotium species in a feedstuff matrix.
Authors: Greco M, Pose G, Pardo A Abstract Animal feeds are characterized by low water activity values. Nevertheless, fungal contamination with Eurotium species are quite common, causing nutritional depletion, spoilage and economic losses. The aim of this work was to assess Eurotium amstelodami, E. chevalieri, E. repens and E. rubrum growth in a feed matrix at different conditions of water activity (0.71-0.97) and temperature (5, 15, 25, 30 and 37°C). It was found that Eurotium species are able to grow in a wide range of water activity and temperature in a short period of time (7 days) and faster than in synthe...
Source: Revista Argentina de Microbiologia - January 2, 2021 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Considerations on the teaching and promotion of Microbiology].
Authors: Bonofiglio L PMID: 33342551 [PubMed - in process] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - December 23, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Outbreak of bovine paralytic rabies in a disease-free region of Argentina].
We report an outbreak of bovine paralytic rabies in a feed lot in a disease-free area in southern Santa Fe, Argentina. Six of 122 unvaccinated steers died after showing neurological signs (morbimortality = 4.9%) for 24-72 hours, 40-75 days after being transported to the feed lot from a farm located in Formosa. Pathologic examination of the brain in 3 steers revealed gliosis, lymphoplasmacytic meningoencephalitis, and intracytoplasmic inclusion bodies in neurons, along with intralesional detection of the rabies virus antigen by immunohistochemistry in 2 cases. Rabies virus was confirmed by direct immunofluorescence in the b...
Source: Revista Argentina de Microbiologia - December 3, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Bordetella pertussis, a reemerging pathogen in pediatric respiratory infections. A study in Quito, Ecuador.
Authors: Vásconez Noguera S, Jaramillo K, Zabala A, Villacís JE Abstract Bordetella pertussis is the causative agent of pertussis, which mainly affects unvaccinated children, while Bordetella parapertussis causes a disease presenting clinical characteristics that are indistinguishable from whooping cough. Despite high vaccination coverage, pertussis remains a public health concern worldwide, with approximately 140000 cases reported annually. Here we determined the prevalence of B. pertussis and B. parapertussis infection among infants under one year of age by polymerase chain reaction (PCR); our aim b...
Source: Revista Argentina de Microbiologia - November 29, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Influence of a glyphosate-based herbicide on growth parameters and aflatoxin B1 production by Aspergillus section Flavi on maize grains.
Authors: Benito N, Magnoli K, Carranza CS, Aluffi ME, Magnoli CE, Barberis CL Abstract Glyphosate-based herbicides (GBH) are the main pesticides applied worldwide on maize production. Glyphosate-resistant weeds led to the repeated application of high doses of the pesticide. In addition to environmental conditions, the presence of GBH affects the development of Aspergillus species and aflatoxin B1 (AFB1) production under in vitro conditions. The aim of this work was to evaluate the influence of a commercial GBH on growth and AFB1 production by Aspergillus flavus and Aspergillus parasiticus strains under different wa...
Source: Revista Argentina de Microbiologia - November 27, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Argentinean Bacillus thuringiensis strains exhibiting distinct morphology of their parasporal crystals.
Authors: Peralta C, Sauka DH, Marozzi A, Del Valle EE, Palma L PMID: 33189441 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - November 17, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Brucella canis Group 2 isolated in Argentina.
Authors: Boeri EJ, Madariaga MJ, Dominguez ML, Teijeiro ML, Fernandez NM, Elena SA, Trangoni MD Abstract The aim of this study was to estimate the diversity and prevalence of both groups of Brucella canis 1 and 2 with and without deletion respectively in different areas of Argentina. A total of 104 bacterial cultures were typed as B. canis strains using the classical biotyping method. Two PCR assays were performed to confirm that all isolates were B. canis and not Brucella suis. The differentiation between groups 1 and 2 was achieved using another PCR assay and the diversity of B. canis isolates was assessed with f...
Source: Revista Argentina de Microbiologia - November 13, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Autochthonous circulation of Saint Louis encephalitis and West Nile viruses in the Province of La Rioja, Argentina.
The objective of this work was to determine the circulation of both viruses among wild birds in a semiarid ecosystem in the Province of La Rioja through a serologic survey. During spring 2013 and fall 2014, a total of 326 wild birds belonging to 41 species were captured in areas close to the cities of La Rioja and Chilecito, in the Province of La Rioja. While exposure to SLEV and WNV was analyzed in birds' serum through neutralizing antibody detection, viral circulation was estimated through apparent seroprevalence of neutralizing antibodies. The exposure of the avian community to viruses was 3.02% for SLEV and 1.89% for W...
Source: Revista Argentina de Microbiologia - November 13, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Canine nasal rhinosporidiosis in Argentina].
Authors: Borrás P, Messina F, Di Sarli C, Fernandez F, Querol E, Iachini R, Santiso G PMID: 33168230 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - November 12, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Zoonotic parasite Spirometra erinaceieuropaei in a domestic cat from Buenos Aires city, Argentina.
Authors: Matías Gastón P, Pablo B PMID: 33162250 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - November 10, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Respiratory pathogens in infants less than two months old hospitalized with acute respiratory infection.
Authors: Marcone DN, Carballal G, Reyes N, Ellis A, Rubies Y, Vidaurreta S, Echavarria M Abstract Lower acute respiratory infections (ARI) are a frequent cause of morbidity and mortality in infants, respiratory viruses being the major causative agents. The aim of this work was to determine the respiratory pathogen frequency, the clinical characteristics and the outcome in infants
Source: Revista Argentina de Microbiologia - November 10, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[COVID-19: Impact of a pandemic].
Authors: Cuestas ML, Minassian ML PMID: 33032744 [PubMed - in process] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - October 11, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Morphology and molecular taxonomy of the tongue worm, genus Raillietiella (Pentastomida) from the lungs of berber skinks Eumeces schneideri (Scincidae): First report.
Authors: Dajem SB, Morsy K, Alshehri M, El-Kott A, Ibrahim E, El-Mekkawy H, Abdel-Gaber R Abstract In the present study, pentastomids belonging to the order Cephalobaenida were isolated from the lungs of Berber skinks Eumeces schneideri (Famiy: Scincidae), which were morphologically described by light and scanning electron microscopy and taxonomically justified by 18s rDNA molecular analyses of the parasites. Seventeen host specimens were collected from well-vegetated wadis at high altitudes, Jizan, Saudi Arabia as new type locality; twelve specimens (70.59%) were infected. All of the recovered parasites were adult...
Source: Revista Argentina de Microbiologia - October 8, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[First case report of the Balamuthia mandrillaris in the Caman á district of Arequipa, Peru].
In this report, we present the case of a 21-year-old patient, who was hospitalized for a convulsive syndrome with brain tumors, in addition to a cutaneous lesion on the right thigh. Histopathological analysis, PCR and the clinical picture allowed the diagnosis of granulomatous amebic encephalitis. Despite the treatment, the patient had a fatal outcome. PMID: 33012571 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - October 7, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Effectiveness of the National Quality Control Program in Mycology of Argentina and performance evaluation of participating laboratories.
Authors: Mazza M, Davel GO, Refojo N, Taverna CG, Bueno NS, Canteros CE, Córdoba SB, Rivas MC, Joffre MC, Isla G, Abrantes RA, Hevia AI, Toranzo A, Viale M, Members of the Mycology Quality Control Program (PNCCM) Abstract The National Quality Control Program in Mycology (PNCCM) of Argentina was established in 1996 to improve the quality of the mycological diagnosis, to help establish and to set up standardized procedures and continuous training of laboratory staff. The aim of this study was to assess the effectiveness of the PNCCM in the 1996-2018 period. Data from the National Mycology Laboratory Network (N...
Source: Revista Argentina de Microbiologia - October 5, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Seroprevalence and risk factors associated with Neospora caninum in dairy farms from the Province of Salta, Argentina].
The objective of this work was to determine the seroprevalence of Neospora caninum in cattle in Valle de Lerma, province of Salta, Argentina, and the risk factors associated with the disease. Serum samples were taken from 40 cows in each dairy herd, which were analyzed by indirect ELISA to detect antibodies against N. caninum. Chronic and acute infections were discriminated by measuring the avidity of these antibodies. All the herds exhibited at least one seropositive animal, the mean being 35.3 ± 14.9% of positive animals. Specific antibodies were also detected in dogs present in 9of the herds, which showed a serop...
Source: Revista Argentina de Microbiologia - September 17, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Optimization and application of a high-resolution melting protocol in the characterization of avian infectious laryngotracheitis virus.
Authors: Rojas MF, König GA, Vagnozzi AE, Vera FS, Scolaro LA, Craig MI Abstract A previous sequence analysis of a US5 gene fragment of infectious laryngotracheitis virus (ILTV) performed in an Argentinian epidemiological study allowed to differentiate between wild and vaccine strains. This analysis also defined five ILTV haplotypes with specific variations at positions 461, 484, 832, 878 and 894 of the US5 gene. This characterization of viral strains may also be accomplished using the High-Resolution Melting Analysis (HRMA), which has been described as an effective, fast and sensitive method to detect mutatio...
Source: Revista Argentina de Microbiologia - September 15, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Evaluation and selection of culture media for the detection of auxin-like compounds and phosphate solubilization on soil yeasts.
Authors: Mestre MC, Severino ME, Fontenla S Abstract The detection of characteristics associated with plant growth promotion has been studied frequently on bacteria and some of these detection methods were also used on yeasts. Sometimes, these methods, designed for prokaryotes, were used with no prior analysis regarding growth and production on eukaryotes. The aim of the present study was to assess and select the best suitable media for the detection of auxin-like compound production and inorganic-P solubilization on yeast strains. Already published media and new formulations, as well as yeasts with different genet...
Source: Revista Argentina de Microbiologia - September 8, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Baseline prevalence and type distribution of Human papillomavirus in sexually active non-vaccinated adolescent girls from Argentina.
In conclusion, results confirm that HPV (particularly HR-types) are very common among sexually active adolescents, and prevalence rises quickly after their sexual debut. Our HPV type-specific prevalence baseline may be used to monitor post-vaccinal longitudinal changes in Argentina. PMID: 32788072 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - August 15, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Invasive candidiasis: A view to central nervous system infection].
This article summarizes relevant aspects on the clinical characteristics of this pathology, mechanisms of fungus invasion, local immune response to Candida albicans and the impact of genetic defects on innate immune receptors that increase susceptibility to the acquisition of this form of mycosis. PMID: 32768262 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - August 13, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Sporotrichoid nocardiosis by Nocardia brasiliensis].
Authors: Mangieri NA, Guevara Nuñez D, Echavarría G, Bertona E, Castello L, Benchetrit G, De Paulis AN Abstract Nocardia brasiliensis is a gram-positive, branched, aerobic, acid-resistant, rod-shaped bacillus that inhabits in soil, rotten organic matter and waters. Cutaneous nocardiosis in immunocompetent individuals can manifest in three different forms: actinomycetoma, superficial skin infection or lymphocutaneous infection. A case of an 85-year-old woman with an ulcerated lesion on the back of her left hand with erythematous papules in the lymphatic tract infected by N. brasiliensis is described. T...
Source: Revista Argentina de Microbiologia - August 4, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Molecular epidemiology of Campylobacter jejuni isolates from the broiler production chain: first report of MLST profiles in Argentina.
This study showed high genetic diversity among C. jejuni in the broiler production environment in Argentina with novel MLST genotypes. PMID: 32736818 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - August 2, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Corynebacterium pyruviciproducens and Corynebacterium amycolatum mastitis in immunocompetent no breastfeeding women].
This report seeks to give importance to this genus by always ranking cultures, starting with a thorough sample collection up until a complete evaluation of lab results and clinical presentation. PMID: 32718823 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - July 30, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Toxigenic fungal species and natural occurrence of mycotoxins in crops harvested in Argentina.
Authors: Chiotta ML, Fumero MV, Cendoya E, Palazzini JM, Alaniz-Zanon MS, Ramirez ML, Chulze SN Abstract Mycotoxins are secondary metabolites produced by fungal species that mainly belong to Aspergillus, Fusarium, Penicillium and Alternaria, which can grow in a variety of crops including cereals, oilseeds and fruits. Consequently, their prevalence in foods and by-products not only affects human and animal health but also causes important losses in both domestic and international markets. This review provides data about toxigenic fungal species and mycotoxin occurrence in different crops commonly grown in Argentina....
Source: Revista Argentina de Microbiologia - July 30, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Detoxification of Ochratoxin A by a novel Aspergillus oryzae strain and optimization of its biodegradation.
This study demonstrates the potential for using A. oryzae to detoxify OTA and suggests that it could be applied in the food industry to improve food safety and quality. PMID: 32693928 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - July 23, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Removal of dyes by immobilization of Trametes versicolor in a solid-state micro-fermentation system.
Authors: Diorio LA, Fréchou DMS, Levin LN Abstract A novel bioreactor system (low cost and easily scaled-up) is presented for dye decolorization applying filamentous fungi. In this two-phase bioreactor, dyes were decolorized at 28°C in a first phase by immobilized fungi in spherical cartridges prepared with a high-density plastic polyethylene mesh and filled with wheat bran as substrate for growth. In a second phase the capacity of the ligninolytic enzymes (laccase and Mn-peroxidase) present in the extracellular extracts from the solid residues was exploited for decolorization at 50°C. Each sphere be...
Source: Revista Argentina de Microbiologia - July 6, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Plant resistance to pathogens: A review describing the vertical and horizontal resistance concepts].
Authors: Burbano-Figueroa Ó Abstract Understanding plant resistance requires an interdisciplinary effort between biological and agricultural sciences. In this setting, phytopathology has experienced an upsurge of interest from researchers and scholars in the disciplines of ecology, evolution and molecular biology. This encounter did neither avoid misunderstandings among scholars nor the use of similar concepts with different meanings. The purpose of this paper is to offer a modern comprehensive view of plant resistance against pathogens using a classical phytopathology concept as framework: Van der Plank s c...
Source: Revista Argentina de Microbiologia - July 6, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Effect of fungicides commonly used for Fusarium head blight management on growth and fumonisin production by Fusarium proliferatum.
Authors: Cendoya E, Nichea MJ, Monge MDP, Zachetti VGL, Chiacchiera SM, Ramirez ML Abstract Fumonisin occurrence was reported in wheat grains and F. proliferatum has been suggested to be the main contributor to its presence in wheat. Thus, a survey was performed in order to study the impact of four commercial fungicides used in Argentina for controlling Fusarium head blight disease (epoxiconazole+metconazole, tebuconazole, pyraclostrobin+epoxiconazole, and prothioconazole) on growth and fumonisin production of two F. proliferatum strains in relation to water activity (aW; 0.99, 0.97, 0.95) and temperature (15°C...
Source: Revista Argentina de Microbiologia - July 2, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Microscopic and PCR-based detection of microsporidia spores in human stool samples.
In this study, we performed microscopy and nested PCR techniques with PCR product sequencing to detect E. bieneusi in human stool samples. These techniques, if applied together, might prove useful for diagnosis and future epidemiological studies of intestinal microsporidiosis in Argentina. PMID: 32595002 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - July 2, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Cladosporium species causing "Cladosporium rot" on "Bosc" pear fruit in Argentina.
The objective of this work was to determine the Cladosporium species that caused the above mentioned symptoms. The morphological and molecular analyses of the partial sequence of the actin gene (ACT) supported the identification. Cladosporium macrocarpum, Cladosporium subtilissimum and Cladosporium floccosum were determined as the species involved in the disease. Although Cladosporium has been reported to cause pear rot, this is the first report to identify these species as causal agents of this fruit disease. PMID: 32564912 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - June 23, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Virulence genes of Escherichia coli in diarrheic and healthy calves.
This study reports updated data about the virulence profiles of E. coli in dairy calves in Uruguay. A large number of adhesins and toxin genes were detected. Our results demonstrate that E. coli from bovine feces has diarrheagenic and extraintestinal profiles although other NCD risks factors may contribute to the disease outcome. PMID: 32553726 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - June 20, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Statistical approach to Trichinella infection in horses handled by rural slaughterhouses across five distinctive socioeconomic regions in Mexico.
Authors: Solís-Hernández D, Saucedo-Gutiérrez KL, Meza-Lucas A, Gómez-de-Anda FR, Medina-Lerena MS, García-Rodea R, Corona-Souza MT, Pérez-Ramírez MÁ, Vega-Sánchez V, de-la-Rosa-Arana JL Abstract This work aimed to investigate the prevalence of Trichinella infection in horses (Equus ferus caballus) handled by rural slaughterhouses across five distinctive socioeconomic regions in Mexico. Serum samples were obtained by non-probabilistic convenience sampling in the Eastern, Southern Central and Western regions (100 samples of each). Additionally, muscle ti...
Source: Revista Argentina de Microbiologia - June 9, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Nematicidal effect of an Argentine strain of Photorhabdus laumondi laumondi (Enterobacteriaceae) on the free-living nematode Panagrellus redivivus (Rhabditidae: Panagrolaimidae).
Authors: Salas A, Achinelly MF, Sauka DH PMID: 32493573 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - June 6, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Dynamics of neutralizing antibodies against Bovine respiratory syncytial virus in a dairy herd from Santa Fe Province, Argentina.
Authors: Ferella A, Aguirreburualde MSP, Sammarruco A, Parreño V, Santos MJD, Mozgovoj M Abstract Bovine respiratory syncytial virus (BRSV) is one of the most relevant agents responsible for respiratory disease in cattle from both dairy and beef farms. BRSV is spread by horizontal contact causing a constant presence of seropositive animals that favors viral circulation throughout the year. Moreover, reinfections with BRSV are frequent between animals regardless of their age as BRSV does not confer long-lasting protective immunity. Several studies have demonstrated the circulation of BRSV in cattle from diffe...
Source: Revista Argentina de Microbiologia - June 5, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Life expectancy at birth. Microbiology contributions and challenges].
Authors: Lodeiro AR PMID: 32354644 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - May 3, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Incorporation of the rapid HIV test in a sexually-transmitted disease clinic in Buenos Aires: Dramatic increase in the frequency of HIV diagnosis.
Authors: Morando N, Gallo Vaulet ML, Melgar A, Rodríguez Fermepin M, Casco R, Pando MLÁ Abstract Improving access to diagnosis constitutes a key step in the control of the Human immunodeficiency virus (HIV)/AIDS epidemic. Rapid testing is increasingly gaining interest as a powerful diagnostic tool to achieve this goal. The purpose of this study was to implement the rapid HIV test (RHT) in a clinical setting in order to evaluate its effectiveness in increasing HIV diagnosis and patient linkage to the healthcare system. The RHT was offered to all patients attending a sexually-transmitted disease clinic ...
Source: Revista Argentina de Microbiologia - April 11, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Bacteremia and sepsis by Arcanobacterium haemolyticum in a young immunocompetent patient.
We report the case of a twenty-year-old immunocompetent male patient presenting to the emergency room with pharyngitis and fever. Blood cultures were drawn and Arcanobacterium haemolyticum (rough biotype) was recovered. The presence of the arcanolysin gene was investigated at the molecular level and the upstream region was amplified and sequenced in order to correlate it with the smooth or rough biotype. Although the isolate was susceptible to penicillin, vancomycin and gentamicin, empirical treatments first with amoxicillin/clavulanic acid (1g/12h) and then with ceftriaxone (1g/12h) failed and the infection evolved to sep...
Source: Revista Argentina de Microbiologia - March 25, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Sporothrix brasiliensis: A growing hazard in the Northern area of Buenos Aires Province?
Authors: Etchecopaz A, Scarpa M, Mas J, Cuestas ML PMID: 32192862 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - March 21, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Syphilis seroprevalence among HIV-infected males in Istanbul, Turkey.
Authors: Köksal MO, Beka H, Evlice O, Çiftçi S, Keskin F, Başaran S, Akgül B, Eraksoy H, Ağaçfidan A Abstract Syphilis has become a serious issue for human immunodeficiency virus (HIV)-infected patients worldwide in recent years; however, the studies related to HIV coinfection and syphilis reinfections in Istanbul, Turkey, are limited. Our objective was to determine the seroprevalence of syphilis among HIV-infected men in the city which has one of the highest HIV prevalence rates in Turkey. Two hundred and forty four (244) HIV-positive men were evaluated at Istanbul Medical Faculty,...
Source: Revista Argentina de Microbiologia - March 18, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Genetic characterization of rice endophytic bacteria (Oryza sativa L.) with antimicrobial activity against Burkholderia glumae].
In conclusion, strains of the genus Bacillus and Burkholderia are potential biocontrol agents against B. glumae. PMID: 32147231 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - March 11, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Optimization of production of xylanases with low cellulases in Fusarium solani by means of a solid state fermentation using statistical experimental design.
In this study, the ability of the fungus Fusarium solani to produce extracellular xylanases with low cellulolytic activity was optimized by Box Wilson design. The best culture conditions were determined to obtain a crude enzyme preparation with significant xylanolytic activity and little cellulolytic activity. In most treatments, the xylanolytic activity was higher than the cellulolytic activity. A negative effect on the production of endoxylanases, β-xylosidases and endocellulases was observed with the increasing of xylan concentration. Increasing the incubation time adversely affected the production of endocellulase...
Source: Revista Argentina de Microbiologia - March 10, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Emerging and re-emerging viruses: A new challenge for global health in this millennium].
Authors: Cuestas ML, Minassian ML PMID: 32115285 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - March 4, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[First isolation of Leptospira borgpetersenii serovar Hardjo type Hardjo Bovis from a clinical case in cattle in Argentina].
Authors: Koval AA, Brihuega BF, Grune Loffler S, López S, Saint Martin M, Lagioia GG, Insaugarat JR Abstract We here describe the first isolation and molecular typing of Leptospira borgpetersenii serovar Hardjo Bovis in Argentina, obtained from urine of aborted cows from a breeding herd located in Saladillo, Buenos Aires Province. The abortions occurred in coincidence with important floods with many cows presenting suspicious serological titers and subsequent seroconversion. The percentage of abortions was 3.5% of a herd of 1700 cows and the microorganism was isolated from 7 of the 20 urine samples obtained....
Source: Revista Argentina de Microbiologia - February 6, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Antagonic and plant growth-promoting effects of bacteria isolated from mine tailings at El Fraile, Mexico.
The objective of this study was to isolate bacteria detected in the mine tailings at El Fraile-Taxco, focusing on those in the soil from the rhizosphere, the inner tissue of the root, leachate, and water, which have the potential to promote plant growth. The ability of the isolated bacteria to promote plant growth was evaluated in vitro. Of the 151 morphotypes isolated, 51% fix nitrogen, 12% dissolve phosphates, and 12%, 39.7%, and 48.3% produce indole acetic acid, gibberellins, and siderophores, respectively. In addition, 66.7% were observed to produce lytic enzymes, such as proteases, celluloses, lipases, esterases, and ...
Source: Revista Argentina de Microbiologia - January 28, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research