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Revista Argentina de Microbiología
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Journal Information
Issue
Vol. 55. Issue 2.
Pages 109-200 (April - June 2023)
Editorial
Microbiología básica
First molecular characterization of Escherichia coli O157:H7 isolates from clinical samples in Paraguay using whole-genome sequencing
Natalie Weiler, Lucia Jazmín Martínez, Josefina Campos, Tomas Poklepovich, Maria Veronica Orrego, Flavia Ortiz, Mercedes Alvarez, Karina Putzolu, ... Isabel Chinen
Rev Argent Microbiol. 2023;55:111-9
Highlights

  • Predominance of hypervirulent clade 8 among STEC strains in Paraguay.

  • Antimicrobial resistance mechanisms were observed in highly pathogenic strains.

  • O157:H7 STEC are genotypically diverse and are spread among different clusters.

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Effect of glyphosate and ciprofloxacin exposure on enteric bacteria of tadpoles
Ana P. Cuzziol Boccioni, Guillermo García-Effron, Paola M. Peltzer, Rafael C. Lajmanovich
Rev Argent Microbiol. 2023;55:120-8
Highlights

  • Glyphosate-based herbicides (GBH) and ciprofloxacin (CIP) alter tadpoles microbiota.

  • GBH increase taxa diversity and abundance of fast-growing enteric bacteria.

  • CIP exposure reduced taxa diversity and increase dominance of Aeromonas spp.

  • GBH-CIP mixture treatment also cause dysbiosis of bacteria from tadpoles microbiota.

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Identification and molecular characterization of Orf virus infection in occupationally exposed women in South America
Andrea Peralta, Carlos Flores-Olivares, Andrea Verna, Erika González-Altamiranda, Ernesto Odriozola, Carolina Madariaga, Anselmo Odeón, Guido A. König, Germán Cantón
Rev Argent Microbiol. 2023;55:129-32
Highlights

  • Molecular diagnosis made it possible to identify human Orf infection.

  • Phylogenetic analysis based on 4 ORFV genes.

  • First molecular comparison of human ORFV strains from Argentina and Chile.

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Microbiología clínica y enfermedades infecciosas
Laboratory surveillance of invasive Haemophilus influenzae disease in Argentina, 2011–2019
Adriana Efron, Daniela Nápoli, Silvina Neyro, María del Valle Juárez, María Moscoloni, Nahuel Sánchez Eluchans, Mabel Regueira, Silvina Lavayén, ... Mauricio Santos
Rev Argent Microbiol. 2023;55:133-42
Highlights

  • Reemergence of invasive H. influenzae b disease was observed.

  • The clon ST-6 was the most frequent.

  • Laboratory surveillance is essential.

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Comparison of SARS-CoV-2 viral load in asymptomatic and symptomatic children attended in a referral public pediatric hospital in Argentina
Marcelo Darío Golemba, Matías Moragas, María Florencia Fernández, Daniela Borgnia, Martín Ruhle, Marcela Palladino, Ana Paula Arias, Silvina Ruvinsky, ... Andrea Mangano
Rev Argent Microbiol. 2023;55:143-9
Highlights

  • SARS-CoV-2 viral load quantitative data in children was analyzed.

  • Symptomatic children had higher viral load compared to asymptomatic children.

  • Viral load results may help healthcare workers to safely manage infected children.

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Characterization of a Clostridioides difficile ST-293 isolate from a recurrent infection in Argentina
P. Cecilia Soldavini Pelichotti, Daniela Cejas, Liliana Fernández-Caniggia, Fernando M. Trejo, Pablo F. Pérez
Rev Argent Microbiol. 2023;55:150-9
Highlights

  • Clostridioides difficile ALCD3 shows high efficiency in sporulation.

  • Spores germinate easily in the presence of taurocholate and glycine.

  • Results suggest high pathogenic potential and spreading of this nosocomial strain.

  • This is the first report of an isolate belonging to the MLST ST-293 in Argentina.

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Enfermedad del legionario en Argentina: evolución de la estrategia diagnóstica en el laboratorio
Lucía Cipolla, Florencia Rocca, Rita Armitano, Beatriz López, Mónica Prieto
Rev Argent Microbiol. 2023;55:160-6
Highlights

  • Durante 2016-2021 fueron confirmados 12 de los 93 casos de neumonía con sospecha de legionelosis.

  • La prueba del antígeno urinario resultó negativa en 4 de los 12 casos confirmados.

  • La incorporación de métodos moleculares contribuyó a evitar falsos negativos.

  • L. pneumophila fue aislada de secreciones respiratorias de 6 pacientes.

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Improvement of bovine pestiviral diagnosis by the development of a cost-effective method for detecting viral RNA in fresh specimens and samples spotted in filter papers
Paula M. Favaro, Ana Molineri, Maria J. Dus Santos, Luis F. Calvinho, Andrea Pecora
Rev Argent Microbiol. 2023;55:167-75
Highlights

  • We developed a RT-qPCR method that detects all bovine pestiviruses and allows to pool samples.

  • Bovine pestiviruses RNA was preserved in two types of filter papers up to 12 months.

  • RNA was stable at room temperature for 6 months in chromatographic paper.

  • RNA obtained from PI animals was recovered from papers stored up to 12 months.

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Microbiología de alimentos
Microbiological and chemical characterization of water kefir: An innovative source of potential probiotics for bee nutrition
María A. Rodríguez, Leticia A. Fernández, Marina L. Díaz, Mónica Pérez, Miguel Corona, Francisco J. Reynaldi
Rev Argent Microbiol. 2023;55:176-80
Highlights

  • Relevant microbial community was still present on kefir after one year of storage.

  • Bacteria and yeasts were more numerous in kefir grains compared with beverage.

  • Lentilactobacillus hilgardii, Lentilactobacillus buchneri and Saccharomyces cerevisiae were identified in water kefir.

  • Water kefir may be an innovative source of potential probiotic strains for bee nutrition.

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Comprehensive evaluation of abattoirs with no Hazard Analysis Critical Control Point plan in Tucumán, Argentina
Gabriela Pérez Terrazzino, Magdalena Costa, Alejandro López Campo, Carolina Saade, María Paula Moreno Mochi, Marcelo Signorini, Ariel Roge, Claudia Van Der Ploeg, ... María Ángela Jure
Rev Argent Microbiol. 2023;55:181-8
Highlights

  • Study focused on two abattoirs without HACCP plan from Tucumán, Argentina.

  • Risk estimation showed a marked predominance of high risk in both abattoirs.

  • Differences of indicator microorganisms between abattoirs were not significant.

  • Salmonella spp. and STEC were isolated from carcass and environmental samples.

  • The need to work with authority in search of a standard remains unaddressed.

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Artículo especial
Candida albicans the main opportunistic pathogenic fungus in humans
Ignacio Uriel Macias-Paz, Salvador Pérez-Hernández, Alejandra Tavera-Tapia, Juan Pedro Luna-Arias, José Eugenio Guerra-Cárdenas, Elizabeth Reyna-Beltrán
Rev Argent Microbiol. 2023;55:189-98
Highlights

  • Candida albicans is the main opportunistic fungus of humans.

  • Eno1, Pgk1 and Als1 of C. albicans have significant immunogenicity.

  • Virulence factors involved in the pathogenesis of C. albicans.

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Imagen microbiológica
Mycoparasitic interaction between Trichoderma afroharzianum strain Th2RI99 and Rhizoctonia solani
Eliana Melignani, Mara E. Martin, Vanesa Y. Mema, Catalina B. Taibo, Julia V. Sabio y García, Viviana A. Barrera
Rev Argent Microbiol. 2023;55:199-200
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