Revista Argentina de microbiología (Rev Argent Microbiol )

Publisher: Asociación Argentina de Microbiología

Description

La Revista Argentina de Microbiología es una publicación trimestral, editada por la Asociación Argentina de Microbiología y destinada a la difusión de trabajos en las distintas áreas de la microbiología.

  • Impact factor
    0.54
  • 5-year impact
    0.00
  • Cited half-life
    6.80
  • Immediacy index
    0.11
  • Eigenfactor
    0.00
  • Article influence
    0.00
  • Website
    Revista Argentina de Microbiologia website
  • Other titles
    Revista argentina de microbiología (Online)
  • ISSN
    0325-7541
  • OCLC
    85449370
  • Material type
    Document, Periodical, Internet resource
  • Document type
    Internet Resource, Computer File, Journal / Magazine / Newspaper

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Bacterial richness in maritime Antarctica has been poorly described to date. Phylogenetic affiliation of seawater free-living microbial assemblages was studied from three locations near the Argentinean Jubany Station during two Antarctic summers. Sixty 16S RNA cloned sequences were phylogenetically affiliated to Alphaproteobacteria (30/60 clones), Gammaproteobacteria(19/60 clones), Betaproteobacteria and Cytophaga–Flavobacteriia– Bacteroides (CFB), which were (2/60) and (3/60) respectively. Furthermore, six out of 60 clones could not be classified. Both, Alphaproteobacteria and Gammaproteobacteria, showed several endemic and previously undescribed sequences. Moreover, the absence of Cyanobacteria sequences in our samples is remarkable. In conclusion, we are reporting a rich sequence assemblage composed of widely divergent isolates among themselves and distant from the most closely related sequences currently deposited in data banks.
    Revista Argentina de microbiología 07/2014; 46(3):218-230.
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    ABSTRACT: Microbicides are a new tool, still under investigation, which could help prevent infection by the human immunodeficiency virus (HIV) and other sexually transmitted infections (STIs). Increasing evidence shows that the complexity of sexual transmission of viral pathogens requires the identification of compounds able to block the early events during the cycle of viral infection. In this manuscript we provide a comprehensive review of the different microbicide strategies that have been studied or are currently being considered for STI prevention, particularly emphasizing those having the potential to block HIV infection. The manuscript also reviews the complex process that is required to conduct future clinical studies in humans and concludes with a brief discussion of the strategies that could be part of the immediate future in microbicide research. Copyright © 2014 Asociación Argentina de Microbiología. Publicado por Elsevier España. All rights reserved.
    Revista Argentina de microbiología 07/2014; 46(3):256-268.
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    ABSTRACT: Microbiological pollution of recreational waters is a major problem for public health as it may transmit waterborne diseases. To assess water quality, current legislation only requires limits for bacterial indicators; however, these organisms do not accurately predict the presence of parasites. Small number of parasites is usually present in water and although they are capable of causing disease, they may not be high enough to be detected. Detection therefore requires water samples to be concentrated. In this work three recreational aquatic environments located in the province of Salta were monitored over one year. For parasite quantification, water samples were collected every three months and concentrated by ultrafiltration. Detection was performed by microscopy. In addition, monthly monitoring was carried out in each aquatic environment: physicochemical variables were measured in situ and bacteriological counts were determined by traditional microbiological techniques. Of 14 parasites identified, at least nine were detected in each aquatic environment sampled. While bacteriological contamination decreased in most cases during winter (76-99%), parasites were present year-round, becoming a continual threat to public health. Thus, we here propose that it is necessary to use specific parasitological indicators to prevent waterborne disease transmission. Our results suggest that Entamoeba would be a suitable indicator as it was found in all environments and showed minimal seasonal variation. The results obtained in this study have epidemiological relevance and will allow decision-makers to propose solutions for water protection in order to care for population health.
    Revista Argentina de microbiología 04/2014; 46(2):150-60.
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    ABSTRACT: Existe una gran variedad de leches fermentadas con bacterias lácticas, con propiedades que promueven la salud. Recientemente se ha comunicado que las proteínas de los alimentos pueden, además, ejercer otras funciones in vivo, por medio de sus péptidos con actividad biológica. Estos péptidos se encuentran encriptados dentro de la estructura primaria de las proteínas y pueden ser liberados por fermentación de la leche, hidrólisis enzimática, o bien durante el tránsito gastrointestinal. Las funciones que presentan son diversas, ya que pueden actuar en diferentes sistemas del cuerpo humano: el cardiovascular, el digestivo, el endocrino, el inmune y el nervioso. Los péptidos bioactivos que presentan un efecto en el sistema cardiovascular (antihipertensivo, antitrombótico, antioxidante o hipocolesterolémico) pueden reducir los factores de riesgo para la manifestación de enfermedades crónicas y ayudar a mejorar la salud humana. Los péptidos bioactivos más estudiados son aquellos que ejercen un efecto antihipertensivo a través de la inhibición de la enzima convertidora de angiotensina (ACE). Este documento se enfoca en la producción de péptidos antihipertensivos inhibidores de la ACE en leches fermentadas, en su historia, y en las pruebas in vivo realizadas en ratas y en humanos, donde se ha demostrado su efecto hipotensor.
    Revista Argentina de microbiología 02/2014; 46(1):58-66.
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    ABSTRACT: Toxoplasmosis is an opportunistic infection caused by the parasite Toxoplasma gondii. The infection is severe and difficult to diagnose in patients receiving allogeneic hematopoietic stem cell transplantation (HSCT). Twelve patients receiving HSCT were monitored post-transplant, by qualitative PCR at the Children's Hospital S.A.M.I.C. "Prof. Dr. Juan P. Garrahan". The monitoring of these patients was defined by a history of positive serology for toxoplasmosis in the donor or recipient and because their hematologic condition did not allow the use of trimethoprim-sulfamethoxazole for prophylaxis. During the patients' monitoring, two of them with positive PCR results showed signs of illness by T. gondii and were treated with pyrimethamine-clindamycin. In two other patients, toxoplasmosis was the cause of death and an autopsy finding, showing negative PCR results. Four patients without clinical manifestations received treatment for toxoplasmosis because of positive PCR detection. In four patients there were no signs of toxoplasmosis disease and negative PCR results during follow-up. The qualitative PCR technique proved useful for the detection of toxoplasmosis reactivation in HSCT recipients, but has limitations in monitoring and making clinical decisions due to the persistence of positive PCR over time and manifestations of toxicity caused by the treatment.
    Revista Argentina de microbiología 01/2014; 46(1):24-9.
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    ABSTRACT: Salmonella enterica serovar Heidelberg ranks among the most prevalent causes of human salmonellosis in the United States and Canada, although it has been infrequently reported in South American and European countries. Most Salmonella infections are self-limiting; however, some invasive infections require antimicrobial therapy. In this work we characterized an oxyimino-cephalosporin resistant S. Heidelberg isolate recovered from an inpatient in a Buenos Aires hospital. CMY-2 was responsible for the β-lactam resistance profile. S. Heidelberg contained a 97kb plasmid belonging to the Inc N group harboring blaCMY-2. ISEcp1 was located upstream blaCMY-2 driving its expression and mobilization. The isolate belonged to sequence type 15 and virotyping revealed the presence of sopE gene. In this study we identified the first CMY-2 producing isolate of S. Heidelberg in Argentina and even in South America.
    Revista Argentina de microbiología 01/2014; 46(1):30-3.
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    ABSTRACT: Toxocariasis is an infection that has worldwide distribution. Toxocara canis is the most relevant agent due to its frequent occurrence in humans. Soil contamination with embryonated eggs is the primary source of T. canis. This study aimed to determine the seroprevalence of toxocariasis in 10-month to 3 year-old abandoned infants, considered to be at high risk because of their orphanhood status and early age. Blood samples were collected from 120 children institutionalized in an orphanage in the city of La Plata. In this study, we observed 38.33% of seropositive cases for T. canis by ELISA and 45% by Western blot techniques; significant differences among groups A (<1 year), B (1-2 years) and C (>2 years) were also found. In research group A, children presented a seropositivity rate of 23.91%, in group B of 42.85% and in group C of 56%, which indicates an increase in frequency as age advances, probably because of greater chances of contact with infective forms of the parasite since canines and soil are frequently infected with T. canis eggs. Abandoned children come from poor households, under highly unsanitary conditions resulting from inadequate or lack of water supply and sewer networks, and frequent promiscuity with canines, which promotes the occurrence of parasitic diseases. These children are highly vulnerable due to their orphanhood status and age.
    Revista Argentina de microbiología 01/2014; 46(1):3-6.
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    ABSTRACT: Potato common scab is caused by several soil-inhabiting pathogenic Streptomyces species. In the present study, a species-specific PCR method was used to detect Streptomyces species in potato tuber lesions and soils. Total genomic DNA from soil samples from six locations and tuber samples from four potato cultivars (Spunta, Shepody, Innovator and Russet Burbank) were assessed. Streptomyces scabies, Streptomyces acidiscabies, and Streptomyces turgidiscabies were detected in soybean, tobacco and potato soils and in all potato varieties except Russet Burbank. The phylogenetic analysis of the sequences obtained confirmed the identification. The method proposed proved to be time-saving and cost effective for the rapid detection of Streptomyces species. This is the first report of the detection of S. acidiscabies and S. turgidiscabies in soils and potato tubers from Argentina.
    Revista Argentina de microbiología 10/2013; 45(4):277-281.
  • Revista Argentina de microbiología 09/2013; 45(3):145-146.
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    ABSTRACT: In a rodent (Rattus norvegicus) survey in Buenos Aires province, metacestodes of tapeworms were found encysted in the liver of the host. The aim of this work was the morphological and molecular identification of this parasite. To achieve the molecular characterization of the parasite, ribosomal (28S) and mitochondrial (COI) DNA were amplified and sequenced. Based on both morphological and molecular data using bioinformatic tools, the metacestode was identified as Cysticercus fasciolaris. The adult form of this tapeworm (Taenia taeniaeformis) commonly infects felid and canid mammalian hosts. This is the first report on the molecular identification of Cysticercus fasciolaris in Buenos Aires province (Argentina).
    Revista Argentina de microbiología 09/2013; 45(3):150-153.