3
Detection and characterization of highly pathogenic avian influenza A (H5N1) clade 2.3.4.4b virus circulating in Argentina in 2023María Carolina Artuso, Vanina Daniela Marchione, Estefanía Benedetti, Paula Bonastre, Ana María Alvarez, Luana Piccini, Angeles Ponde, Evelyn Barrios Benito, ... Ana María Nicola
Rev Argent Microbiol. 2025;57:327-35
3
Highlights
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The first outbreak of avian influenza A (H5N1) detected in Argentina was in February 2023.
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The analysis of HA sequences classified them in clade 2.3.4.4b circulating in America.
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Epidemiological analysis suggests multiple simultaneous entries by migratory birds.
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Epidemiological surveillance in exposed humans has not detected cases in Argentina.
3
Update of diagnostic methods in tuberculosis (TB)Mario José Matteo, María Cecilia Latini, Davor Nicolás Martinovic, Marina Bottiglieri
Rev Argent Microbiol. 2025;57:49-53
3
Highlights
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The “End TB” strategy aims to reduce deaths and incidence from 2015 to 2035.
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Rapid diagnostic tests recommended by WHO are cost-effective.
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Traditional and new diagnostic techniques for TB were reviewed.
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Includes IGRA, smear, culture, molecular methods, and lipoarabinomannan antigen.
2
Diversity of hypervirulent Klebsiella pneumoniae clones causing cryptogenic liver abscesses and metastatic complications in ArgentinaEsteban C. Nannini, Matías Lahitte, Pablo Scapellato, Corina Nemirosvky, Marcelo Zylberman, Andrea Vila, Viviana Rodríguez, Roman Zucchi, ... Mariángel Rinaudo
Rev Argent Microbiol. 2025;57:356-63
2
Highlights
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Hypervirulent Klebsiella pneumoniae (hvKP) strains are of public health concern.
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We report patients with hvKP liver abscesses suffering a high rate of complications.
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Studied hvKP isolates had rpmA and iroB genes, possibly linked to severe illness.
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K1 serotypes often belonged to ST23 while K2 strains showed significant diversity.
2
Detection of EPEC and STEC strains isolated from children with diarrhea in ArgentinaDaniel Fernández Fellenz, Julia M. Ruiz, Analía I. Etcheverría, Rocio Colello, María V. Velez, Marcelo E. Sanz, Mónica D. Sparo, Sabina Lissarrague, ... Nora L. Padola
Rev Argent Microbiol. 2025;57:59-62
2
Highlights
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Stool samples from 122 children diagnosed with acute diarrhea were recollected for detection of STEC and EPEC pathotypes.
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E. coli were detected in 68% of the stool samples, of which 18.8% were STEC or EPEC.
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STEC O145 and EPEC O130, O113 and O157 were the serotypes detected.
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DEC are not routinely tested in clinical laboratories and proper surveillance is necessary.
2
Broaden properties of ambroxol hydrochloride as an antibiofilm compoundMaría J. González, Michela Lain, Victoria Iribarnegaray, Luciana Robino, Paola Scavone
Rev Argent Microbiol. 2025;57:114-24
2
Highlights
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Ambroxol inhibits biofilm formation of gram positive and negative bacteria.
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Ambroxol can eradicate preformed biofilms.
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Bacterial viability is reduced by ambroxol.
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Efflux pumps are affected by the presence of ambroxol.
1
Analysis of Escherichia coli isolated from minced meat: Implications for public health in Tierra del Fuego, ArgentinaElisa Crespi, Bárbara Ghiglione, Ximena Blanco Crivelli, Cecilia Cundon, Roque Figueroa Espinosa, Pedro Penzotti, Ezequiel Nuske, Alicia Broglio, ... Adriana Bentancor
Rev Argent Microbiol. 2025;57:399-407
1
Highlights
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E. coli contamination spreads easily in ground meat, risking public health.
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Twenty four percent of isolates resist gentamicin, threatening treatment options.
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Eight isolates show co-occurrence of two aminoglycoside resistance genes.
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EAEC pathogenic potential discovered in eleven meat sample isolates.
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Food handlers can spread antimicrobial-resistant E. coli unknowingly.
