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Inhibitory action of antibiotics on Kluyveromyces marxianus Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2024-03-11 Rafael Lisandro Althaus, Orlando Guillermo Nagel, Dafna Eluk
Se utilizó un bioensayo en placas de microtitulación que contenían para determinar la acción inhibitoria en suero de 28 antibióticos (incluyendo aminoglucósidos, betalactámicos, macrólidos, quinolonas, tetraciclinas y sulfonamidas) contra esta levadura. Para ello, se construyeron curvas dosis/respuesta utilizando 16 réplicas de 12 concentraciones diferentes de cada antibiótico. Las placas se incubaron
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Effects of vaccination with Brucella melitensis, strains Rev 1 ΔeryCD and Rev 1, on the reproductive system of young male goats Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2024-03-06 Isauro Alejandro López Vásquez, Erika Gabriela Palomares Resendiz, José Luis Gutiérrez Hernández, Germán Isauro Garrido Fariña, Jorge Luis Tórtora Pérez, José de Jesús Olmos Espejel, Rigoberto Hernández Castro, Félix Sangari, Francisco Suárez Güemes, Efrén Díaz Aparicio
La presente investigación evalúa los efectos de la vacunación con cepas Rev 1 y Rev 1 en el sistema reproductivo de machos caprinos. Se estudiaron tres grupos de caprinos, integrado cada grupo por 15 machos libres de brucelosis de seis meses de edad. El primer grupo fue vacunado con la cepa Rev 1 , el segundo grupo recibió Rev 1 y el tercer grupo recibió solución salina fisiológica estéril (control)
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Genomic characterization of Moraxella bovis and Moraxella bovoculi Uruguayan strains isolated from calves with infectious bovine keratoconjunctivitis Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2024-02-24 Lucía Bilbao, Sofía Acquistapace, Ana Umpiérrez, Pablo Smircich, Pablo Alonzo, José R. Sotelo-Silveira, Pablo Zunino
La queratoconjuntivitis infecciosa bovina (QIB) es una enfermedad ocular que afecta al ganado, con impacto significativo en todo el mundo. Las bacterias y son sus principales agentes etiológicos. La terapia antimicrobiana contra la QIB suele ser dificultosa en el campo y, aunque existen vacunas, su eficacia es variable y dependiente de las cepas que circulan localmente. El objetivo de este estudio
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Comparison of two MALDI-TOF MS systems for the identification of clinically relevant anaerobic bacteria in Argentina Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2024-02-16 Mirta Litterio, Liliana Castello, María Elena Venuta, Sofía Abel, Liliana Fernández-Canigia, María Cristina Legaria, Raquel Rollet, Daniela Vaustat, Natalia Azula, Bárbara Fox, Silvina Otero, María Laura Maldonado, Natalia Alejandra Mangieri, María Adelaida Rossetti, Silvia Carla Predari, Daniela Cejas, Claudia Barberis
El objetivo de este estudio fue comparar el desempeño de dos sistemas MALDI-TOF MS en la identificación de bacterias anaerobias estrictas de interés clínico. La secuenciación del gen 16S ARNr fue el método de referencia utilizado cuando se observaron discrepancias o inconsistencias entre plataformas. Se recuperaron 333 aislados de muestras clínicas de diferentes centros de la Ciudad Autónoma de Buenos
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Transcriptional study of genes involved in the passage from teliospore to hyphae stage in the fungus Thecaphora frezii, the causal agent of peanut smut Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2024-02-08 María S. Díaz, Néstor W. Soria, Ana C. Figueroa, Pablo Yang, Esteban H. Badariotti, Valeria R. Alasino, Pablo Vélez, Dante M. Beltramo
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Bacterial diversity using metagenomics of 16s rDNA in water kefir, an innovative source of probiotics for bee nutrition Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2024-01-24 María A. Rodríguez, Leticia A. Fernández, Marina L. Díaz, Cristian A. Gallo, Miguel Corona, Jay D. Evans, Francisco J. Reynaldi
Water kefir is a sparkling, slightly acidic fermented beverage made from sugar, water, and water kefir grains, which are a mixture of yeast and bacteria. These grains produce a variety of fermentation compounds such as lactic acid, acetaldehyde, acetoin, ethanol and carbon dioxide. In this study, a high-throughput sequencing technique was used to characterize the bacterial composition of the original
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Distribution, seroprevalence and risk factors for bovine brucellosis in Brazil: Official data, systematic review and meta-analysis Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2024-01-03 Isis Daniele dos Santos Rocha, Inácio José Clementino, Débora Luise Canuto de Sousa, Clebert José Alves, Carolina de Sousa Américo Batista Santos, Sérgio Santos de Azevedo
Bovine brucellosis is an endemic disease in Brazil, and evidence-based assessments of the available literature on its seroprevalence and risk factors are limited. The aim of this study was to systematically review and summarize studies related to seroprevalence and risk factors of bovine brucellosis in the entire Brazil, in addition to comparing published data with the most recent official reports
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Parásitos humanos en aguas superficiales de uso recreativo en Salta, Argentina Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-12-27 Diego G. Sanguino-Jorquera, Hugo R. Poma, Verónica B. Rajal, María M. Juárez, Verónica P. Irazusta
Las enfermedades transmitidas por el agua pueden tener diferente origen; las bacterias y los parásitos son los agentes causales más importantes. En este trabajo se monitorearon muestras de agua en tres puntos próximos a una zona recreativa en la provincia de Salta (Argentina): dos en un arroyo que rodea a un complejo termal, aguas arriba y aguas abajo de donde descargan las aguas de dicho complejo;
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The MVA vector expressing the F protein of bovine respiratory syncytial virus is immunogenic in systemic and mucosal immunization routes Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-12-23 Alejandra Ferella, Marina Mozgovoj, Débora Garanzini, María José Dus Santos, Gabriela Calamante, María Paula Del Médico Zajac
Bovine respiratory syncytial virus (BRSV) affects both beef and dairy cattle, reaching morbidity and mortality rates of 60–80% and 20%, respectively. The aim of this study was to obtain a recombinant MVA expressing the BRSV F protein (MVA-F) as a vaccine against BRSV and to evaluate the immune response induced by MVA-F after systemic immunization in homologous and heterologous vaccination (MVA-F alone
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Antimicrobial Resistance: A global, multisectoral concern that requires a coordinated response Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-12-21 Marcelo Galas
Abstract not available
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Toward Global Viral Hepatitis Eradication by 2030: Challenges and Strategies Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-12-21 Pamela Valva
Abstract not available
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Corrigendum to “Placentitis and abortion caused by a multidrug resistant strain of Campylobacter fetus subspecies fetus in a sheep in Uruguay” Revista Argentina de Microbiología 54 (2022) 25-30 Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-12-21 Matías A. Dorsch, María L. Casaux, Lucía Calleros, Virginia Aráoz, Rubén D. Caffarena, Cecilia Monesiglio, Maila Barcellos, Caroline da Silva Silveira, Yisell Perdomo, Georgget Banchero, Francisco A. Uzal, Martín Fraga, Federico Giannitti
Abstract not available
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In house-development of a rapid immunochromatographic test for the detection of Escherichia coli in urine samples Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-12-08 Paula Da Cunda, Amy Mónaco, María Moreno, María José Gonzalez, Paola Scavone, Luciana Robino
Urinary tract infections (UTIs) are a common health concern. Urine culture is the “gold standard” for UTI diagnosis but takes 48 h. Rapid methods like dipstick tests are used as point-of-care tests. However, their sensitivity and specificity are variable. In this work, a rapid immunochromatographic test (IT) for detecting Escherichia coli in urine was developed, and its performance was evaluated in
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Prevalencia y distribución geográfica de las enfermedades de transmisión sexual de los bovinos en la provincia de Formosa, Argentina Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-11-07 María Nair Viola, Iris Carolina Elías, Marcelo Signorini, Ana Ines Molineri, Ana María Russo, Patricia Andrea Zimmer, Laura Analía Lozina, Juana Noemí Gimenez
La campilobacteriosis genital bovina (CGB) y la tricomonosis bovina (TB) son enfermedades de transmisión sexual (ETS) que afectan a los rodeos de cría bovina y disminuyen su eficiencia reproductiva. El objetivo de este trabajo fue estimar la prevalencia de estas enfermedades y su distribución témporo-espacial en la provincia de Formosa, Argentina. El estudio fue transversal, se desarrolló durante 2018-2021
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Macroencapsulation of Limosilactobacillus reuteri DSPV002C as nutritional supplement for piglets: Storage stability and survival in gastrointestinal conditions Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-11-01 Jorge Alberto Zimmermann, Noelí Sirini, Carolina Raquel Olivero, María Sol Renna, Marcelo Lisandro Signorini, María Virginia Zbrun, Laureano Sebastián Frizzo, Lorena Paola Soto
The aim of this study was to evaluate the protective effect of the encapsulation of Limosilactobacillus reuteri DSPV002C in macrocapsules made from industrial materials during production, storage and under simulated gastrointestinal conditions in vitro and in vivo. The production of macrocapsules involved the evaluation of different wall materials (matrix), namely, gelatin and pregelatinized starch
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Detection of plasma anti-lipopolysaccharide (LPS) antibodies against enterohemorrhagic Escherichia coli (EHEC) in asymptomatic kindergarten teachers from Buenos Aires province Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-09-12 Romina J. Fernandez-Brando, Flavia Sacerdoti, María M. Amaral, Alan M. Bernal, Marcelo Da Rocha, Marcela Belardo, Marina S. Palermo, Cristina A. Ibarra
In Argentina, hemolytic uremic syndrome (HUS) caused by EHEC has the highest incidence in the world. EHEC infection has an endemo-epidemic behavior, causing 20–30% of acute bloody diarrhea syndrome in children under 5 years old. In the period 2016–2020, 272 new cases per year were notified to the National Health Surveillance System. Multiple factors are responsible for HUS incidence in Argentina including
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Similarities of Geobacillus bacteria based on their profiles of antimicrobial susceptibility in milk samples Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-09-12 Orlando G. Nagel, Maria L. Gasparotti, Selva I. Machado, Rafael L. Althaus
The genus Geobacillus is composed of thermophilic bacteria that exhibit diverse biotechnological potentialities. Specifically, Geobacillus stearothermophilus is included as a test bacterium in commercial microbiological inhibition methods, although it exhibits limited sensitivity to aminoglycosides, macrolides, and quinolones. Therefore, this article evaluates the antibiotic susceptibility profiles
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Beneficios ecológicos y biológicos del hongo cosmopolita Trichoderma spp. en la agricultura: una perspectiva en el campo mexicano Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-09-12 Petra Andrade-Hoyos, Mally N. Rivera-Jiménez, Nadia Landero-Valenzuela, Hilda V. Silva-Rojas, Saira J. Martínez-Salgado, Omar Romero-Arenas
Existen numerosos estudios científicos sobre las características generales del hongo filamentoso Trichoderma spp. que demuestran su extensa gama de interrelaciones en los ecosistemas y su actividad beneficiosa para el sector agrícola y la agroindustria. También se ha documentado su importancia en la preservación y restauración de la microbiota del suelo. Los beneficios biológicos y ecológicos de Trichoderma
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Growth, tolerance, and enzyme activities of Trichoderma strains in culture media added with a pyrethroids-based insecticide Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-08-26 Caliope Mendarte-Alquisira, Alejandro Alarcón, Ronald Ferrera-Cerrato
The application of pyrethroids and carbamates represents an environmental risk and may exert adverse effects on beneficial microorganisms such as Trichoderma, which contribute to the biocontrol of several fungal phytopathogens. This research evaluated the tolerance of several strains of Trichoderma to a selected culture medium contaminated with a commercial insecticide (H24®) composed of pyrethroids
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Asociación del consumo de drogas ilícitas en mujeres embarazadas y sífilis congénita en un Hospital Público de México Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-08-19 Lucía Miramontes-Buiza, Juan Carlos Lona-Reyes, Rene Oswaldo Pérez-Ramírez, Diego Magallón-Picazo, Araceli Cordero-Zamora, Larissa María Gómez-Ruiz, Tania Alejandra Cruz-Chávez
Realizamos un estudio de casos y controles anidado en una cohorte con el objetivo de estudiar la asociación del consumo de drogas ilícitas y sífilis congénita (SC). Los casos se diagnosticaron mediante pruebas treponémicas y no treponémicas en la madre y el recién nacido (RN). Se realizó un análisis multivariado con regresión logística. Se registraron 6.171 nacimientos con edad gestacional promedio
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Feline sporotrichosis due to Sporothrix globosa in the Metropolitan region of Buenos Aires: A case study Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-08-19 Alejandro N. Etchecopaz, Katherine Hermida Alava, Miguel Scarpa, Adriana Duchene, Diego García Re, María Luján Cuestas
We describe here the first case of feline sporotrichosis caused by Sporothrix globosa, occurring outside the epizootic area of Buenos Aires province, Argentina. Unlike cases reported with Sporothrix brasiliensis, on this occasion there was no clinical or serological evidence of zoonotic transmission through scratches or bites from the sick cat to the attending veterinarian or the person responsible
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Prevalence of Demodex spp. in patients with chronic blepharitis Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-08-03 Viviana Flores, Marina Ruf, Silvia Paola Abad Farfan, Andrea Vanessa Suárez Echávez, Dolores Pilar Bastard, Maria Celeste Puga, Luis Daniel Mazzuoccolo
Blepharitis is a very common disease in ophthalmology, dermatology and allergy practice. It generally follows a chronic course and is frequently associated with objective and/or subjective symptoms such as epiphora, red eye, dandruff, gritty sensation, itching, burning, photophobia, and blurred vision. The purpose of this study is to analyze the prevalence of Demodex spp. in patients with symptoms
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Caracterización molecular de Escherichia coli diarreogénica proveniente de población pediátrica ambulatoria con diarrea, atendida en dos hospitales de Buenos Aires, Argentina Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-07-25 Nora Beatriz Molina, Sebastián Oderiz, Marisa Ana López, Juan Ángel Basualdo, Mónica Delfina Sparo
Escherichia coli diarreogénica abarca un grupo heterogéneo de patotipos o variantes patogénicas que comparten características fenotípicas con marcadas diferencias en genes de virulencia, sitios de colonización, patogenia, presentación clínica y epidemiología de la infección. Los patotipos más estudiados son E. coli productora de toxina Shiga (STEC), E. coli enterotoxigénica (ETEC), E. coli enteropatogénica
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Estudio epidemiológico y serotipificación por PCR múltiple de Listeria monocytogenes aislada de matrices alimentarias en Argentina Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-07-19 Yamila Figueroa, Jimena Gentiluomo, Agustina Grisaro, Mariana Buffoni, Nadia Zipenco, Adriana Sucari, Paula Buonfiglio, Magdalena Costa
Listeria monocytogenes es un patógeno oportunista de transmisión alimentaria. Puede resistir condiciones de estrés adaptándose mediante la producción de biofilms, lo que representa un grave problema para la industria alimentaria. Se clasifica en 14 serotipos, aunque solo cuatro (1/2a, 1/2b, 1/2c y 4b) son la causa del 89 al 98% de los casos de listeriosis en todo el mundo. El objetivo del presente
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Optimización en la detección de bacteriemias. Uso integrado de FilmArray (BCID2) y MALDI-TOF Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-07-18 Natalia A. Carrion, Rodolfo E. Quiroz, Camila Asenzo, Manuela Gamarra, Antonio E. Flores, Maria Garcia, Rolando N. Soloaga, Julia Grigioni, Maria Mastroianni, Alejandra Margari, Facundo Molina, Adriana N. Procopio, Vanesa Reijtman, Maria S. Ratti, Victor Mamani, Myriam Vazquez, Diana Viale, Guadalupe Perez
Se analizó la utilidad del uso combinado de MALDI-TOF MS a partir de un subcultivo con 3-5 h de incubación y el panel BCID2 (FilmArray) para la identificación de microorganismos provenientes de hemocultivos positivos y su importancia en el ajuste de la terapia antimicrobiana. La identificación global con BCID2 fue del 90,4% (142/157) y con MALDI-TOF MS del 83,4% (131/157) (p = 0,0858). Sobre 23 episodios
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Reducción de la incidencia de infecciones invasivas por bacterias capsuladas luego del inicio de la Pandemia por COVID-19 Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-07-05 Leda Guzzi, Juan Manuel Sambade, Martin Diego Christin, Federico Rodriguez Cairoli, Alejandra Rodriguez, Silvia Vicario, Miriam Hinojosa Del Carpio, Juan Molinos, Pablo Dimitroff
La interacción entre SARS-COV2 e infecciones invasivas por bacterias capsuladas (IIBC) continúa bajo estudio. Objetivos comparar la incidencia de IIBC antes y durante la Pandemia por COVID-19, evaluar la incidencia de coinfección con COVID-19 y la letalidad. Estudio transversal de registros de un laboratorio centralizado de Microbiología, que asiste a una red de centros asistenciales con 713 camas
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Differential diagnosis of human Entamoeba infections: Morphological and molecular characterization of new isolates in Argentina Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-07-03 Andrea Servián, María Lorena Zonta, Graciela T. Navone
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Identification, phylogenetic analysis, and genome mining of the tetracycline-resistant Bacillus thuringiensis strain m401 reveal its potential for biotechnological and biocontrol applications Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-07-01 Adriana M. Alippi, Florencia Lamelza, Gonzalo A. Torres Tejerizo, Eliana Abrahamovich, Ana C. López
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Identification of serologically active Helicobacter pylori antigens related to alterations in serum pepsinogen levels Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-06-27 Rodolfo González Segovia, Yolanda Romo Lozano, Martín Gerardo Rodríguez, Angelina Lizbeth Montañez Flores, Juan González Macías
Gastric adenocarcinoma is associated with Helicobacter pylori infection. The transition to a carcinogenic process is preceded by glandular atrophy and serum levels of pepsinogen I and II (PGI and PGII) correlate with this type of gastric lesions. Possible associations of serum PG levels in relation to the frequency of serological activity against H. pylori antigens were studied. Serum samples from
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False positive NDM and OXA-48 results of the lateral flow carbapenem-resistant K.N.I.V.O. Detection K-set in Stenotrophomonas maltophilia: Time for official performance evaluation of LFAs? Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-06-27 Georgios Meletis, Areti Tychala, Paraskevi Mantzana, Lemonia Skoura, Efthymia Protonotariou
Abstract not available
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El papel central de la secuenciación masiva y la correcta identificación de microorganismos en el desarrollo de bioinsumos agrícolas seguros Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-06-15 Diego Herman Sauka
Abstract not available
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Mycosynthesis of silver nanoparticles using psychrotrophic strains of Tulasnella albida Bourdot & Galzin from the South Orkney Islands (Antarctica) Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-06-19 Jesica M. Kobashigawa, Carolina A. Robles, Rocío F. Gaiser, Daniel C. Schinca, Lucía B. Scaffardi, Cecilia C. Carmarán
This study is the first report on mycosynthesis of silver nanoparticles (NPs) using psychrotrophic Antarctic filamentous fungi, and the first report regarding Tulasnella (Basidiomycota). In this work, the ability to synthesize silver NPs from cell free filtrates of strains of Tulasnella albida isolated from Antarctica was assessed. All fungal filtrates were capable of synthesizing silver NPs with the
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Biological control of foodborne pathogens by lactic acid bacteria: A focus on juice processing industries Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-06-09 María Clara Tarifa, María del Rosario Agustín, Lorena Inés Brugnoni
The use of lactic acid bacteria (LAB) in foods as biocontrol agents against foodborne pathogens has become increasingly known. Under the premise that controlling the adhesion of microorganisms to food contact surfaces is an essential step for meeting the goals of food processing, the aim of this work was to investigate the inhibitory and anti-biofilm effectiveness of Lactobacillus rhamnosus GG (ATCC
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Surveillance of Shiga toxin-producing Escherichia coli associated bloody diarrhea in Argentina Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-06-08 Marta Rivas, Mariana Pichel, Mariana Colonna, Adrián López Casanello, Laura F. Alconcher, Jimena Galavotti, Iliana Principi, Sofía Pérez Araujo, Flavia B. Ramírez, Gladys González, Luis A. Pianciola, Melina Mazzeo, Ángela Suarez, Sebastián Oderiz, Lidia F.R. Ghezzi, Diego J. Arrigo, José H. Paladini, María R. Baroni, Susana Pérez, Ana Tamborini, Luis Marcelo Casabona
In Argentina, hemolytic uremic syndrome (HUS) caused by Shiga toxin-producing Escherichia coli (STEC-HUS) infection is endemic, and reliable data about prevalence and risk factors have been available since 2000. However, information about STEC-associated bloody diarrhea (BD) is limited. A prospective study was performed during the period October 2018–June 2019 in seven tertiary-hospitals and 18 referral
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Effects of chemical inhibition of histone deacetylase proteins in the growth and virulence of Macrophomina phaseolina (Tassi) Goid. Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-06-07 Nubia Andrea Villota-Salazar, Víctor Hugo Ramos-García, Juan Manuel González-Prieto, Sanjuana Hernández-Delgado
Chromatin remodeling enzymes are important “writers”, “readers” and “erasers” of the epigenetic code. These proteins are responsible for the placement, recognition, and removal of molecular marks in histone tails that trigger structural and functional changes in chromatin. This is also the case for histone deacetylases (HDACs), i.e., enzymes that remove acetyl groups from histone tails, signaling heterochromatin
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Impact of the multiplex molecular FilmArray Respiratory Panel on antibiotic prescription and clinical management of immunocompromised adults with suspected acute respiratory tract infections: A retrospective before–after study Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-04-29 Silvina Bergese, Bárbara Fox, Natalia García-Allende, María Elisa Elisiri, Ana Elizabeth Schneider, Juan Ruiz, Sol Gonzalez-Fraga, Viviana Rodriguez, Liliana Fernandez-Canigia
This study aimed to assess the impact of the implementation of a rapid multiplex molecular FilmArray Respiratory Panel (FRP) on the medical management of immunocompromised patients from a community general hospital. We conducted a single-center, retrospective, and before–after study. Two periods were evaluated: before the implementation of the FRP (pre-FRP) from April 2017 to May 2018 and after the
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El umbral de ciclado predijo la mortalidad en una cohorte de pacientes con neoplasias hematológicas infectados con SARS-CoV-2 Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-04-26 Ignacio Martín Santarelli, Diego Jorge Manzella, María Lucía Gallo Vaulet, Marcelo Rodríguez Fermepín, Yanina Crespo, Santiago Toledo Monaca, Martín Dobarro, Sofía Isabel Fernández
When a SARS-CoV-2 RT-qPCR test is performed, it may determine an indirect measure of viral load called cycle threshold (Ct). Respiratory samples with Ct < 25.0 cycles are considered to contain a high viral load. We aimed to determine whether SARS-CoV-2 Ct at diagnosis could predict mortality in patients with hematologic malignancies (lymphomas, leukemias, multiple myeloma) who contracted COVID-19.
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First nosocomial outbreak of SME-4-producing Serratia marcescens in South America Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-04-24 Juana Vega, Carlos H. Rodriguez, Ignacio Viscardi, Carlos Vay, Silvina Torres, Emilce Tabares, Angela Famiglietti, Marcela Nastro
Carbapenemase-producing-Serratia marcescens isolates, although infrequent, are considered important nosocomial pathogens due to their intrinsic resistance to polymyxins, which limits therapeutic options. We describe a nosocomial outbreak of SME-4-producing S. marcescens in Buenos Aires city which, in our knowledge, represents the first one in South America.
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Ureaplasma diversum–Ureaplasma sp. alone or concomitantly with Mycoplasma hyopneumoniae in pig lungs with and without pneumonia: A descriptive exploratory study in abattoirs Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-04-22 Jimena Seitz, Claudina Vissio, Judith Bertone, Lucas Marques, Julián Parada, Alicia Carranza, Gabriel Di Cola, Roberto Ambrogi, Pablo Tamiozzo
Occurrence of Ureaplasma diversum (U. diversum) has been associated with reproductive failures in cattle and detected in pigs with and without pneumonia. However, its role in the porcine respiratory disease complex (PRDC) is unclear. A cross-sectional study was conducted in abattoirs, inspecting 280 pig lungs from eight herds. All the lungs were inspected, processed and classified according to the
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Role of Proteus mirabilis flagella in biofilm formation Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-04-17 Paola Scavone, Victoria Iribarnegaray, María José González, Nicolás Navarro, Nicole Caneles-Huerta, Jorge Jara-Wilde, Steffen Härtel, Pablo Zunino
Proteus mirabilis (P. mirabilis) is a common etiological agent of urinary tract infections, particularly those associated with catheterization. P. mirabilis efficiently forms biofilms on different surfaces and shows a multicellular behavior called ‘swarming’, mediated by flagella. To date, the role of flagella in P. mirabilis biofilm formation has been under debate. In this study, we assessed the role
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Primera evidencia de actividad enzimática nitrilasa en Xylaria sp., y su relación con la biosíntesis de ácido indol-3-acético Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-04-04 Jorge Ricaño-Rodríguez, Celeste Ricaño-Rodríguez, Daniela Luis-Yong, Oswaldo Guzmán-López
Muchos de los hongos degradadores de madera están implicados en la síntesis de metabolitos bioactivos de naturaleza antimicrobiana y terapéutica, así como de compuestos de importancia biotecnológica, incluyendo derivados indólicos, entre otros. Estos hongos brindan ciertos beneficios ecológicos a las plantas, entre los que se destacan la protección contra fitopatógenos y la promoción del crecimiento
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Enterotoxigenic profiles and submerged and interface biofilms in Bacillus cereus group isolates from foods Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-04-03 Itzel-Maralhi Cruz-Facundo, Roberto Adame-Gómez, Natividad Castro-Alarcón, Jeiry Toribio-Jiménez, Yaneth Castro-Coronel, María-Cristina Santiago-Dionisio, Marco-Antonio Leyva-Vázquez, David Tafolla-Venegas, Arturo Ramírez-Peralta
Biofilm formation by Bacillus cereus strains is now recognized as a systematic contamination mechanism in foods; the aim of this study was to evaluate the production of submerged and interface biofilms in strains of B. cereus group in different materials, the effect of dextrose, motility, the presence of genes related to biofilms and the enterotoxigenic profile of the strains. We determine biofilm
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Statin and aspirin use in parasitic infections as a potential therapeutic strategy: A narrative review Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-04-03 Valentina Burgess, Juan D. Maya
Infections, including zoonoses, constitute a threat to human health due to the spread of resistant pathogens. These diseases generate an inflammatory response controlled by a resolving mechanism involving specialized membrane lipid-derived molecules called lipoxins, resolvins, maresins, and protectins. The production of some of these molecules can be triggered by aspirin or statins. Thus, it is proposed
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Colonization of cigarette butts, a toxic waste, by white rot fungi Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-03-21 María del Pilar Núñez, Matias Butler, Leonardo Matias Majul, Luis Alberto Diorio, Laura Noemi Levin, Sonia Rosenfeldt
Abstract not available
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Peritonitis primaria por neumococo en un hospital pediátrico de Argentina Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-03-17 Mónica E. Martínez, Sandra L. Grenón, Jessica Benítez, Celia Labán, Marta E. Mollerach, Martha H. von Specht
La peritonitis por neumococo comprende un pequeño subconjunto de pacientes con enfermedad invasiva (ENI). Durante 15 años (2005-2020) de vigilancia de ENI en un hospital de pediatría, se detectaron 5 casos de peritonitis primaria. Los pacientes, 3 niñas y 2 niños con una media de edad de 5 años, experimentaron signos y síntomas peritoneales; 3 de ellos presentaban síndrome nefrótico. En coincidencia
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Inoculation with Azospirillum argentinense Az19 improves the yield of maize subjected to water deficit at key stages of plant development Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-03-14 Julia Elena García, Mónica Ruiz, Guillermo Andrés Maroniche, Cecilia Creus, Mariana Puente, Myriam Sara Zawoznik, María Daniela Groppa
Water deficit constitutes a severe limitation to agricultural productivity. In the context of sustainable crop production, the potential of microbial biotechnology to increase plant drought tolerance and improve crop yields under adverse conditions is gaining relevance. This work aimed to compare the performance of Azospirillum argentinense strain Az19 to that of strain Az39, the most widely used for
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Agentes de control biológico de origen microbiano para reducir el impacto de hongos patógenos y toxicogénicos Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-03-15 Sofia Noemí Chulze
Abstract not available
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Molecular detection of SARS-CoV-2 in Argentina: evaluation of alternative diagnostic tools for the decentralization of the diagnosis Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-03-06 Gonzalo Manuel Castro, Paola Sicilia, Robertino Gierotto, Julieta Sosa, Andrés Marcos Castellaro, María Gabriela Barbás, María Belén Pisano, Viviana E. Ré
The rocketing number of COVID-19 cases highlighted the critical role that diagnostic tests play in medical and public health decision-making to contain and mitigate the SARS-CoV-2 pandemic. This study reports the evaluation and implementation of different tests for the molecular detection of SARS-CoV-2 in the central region of Argentina. We evaluated 3 real time RT-PCR kits (GeneFinder COVID-19 Plus
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Comprehensive evaluation of abattoirs with no Hazard Analysis Critical Control Point plan in Tucumán, Argentina Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-02-25 Gabriela Pérez Terrazzino, Magdalena Costa, Alejandro López Campo, Carolina Saade, María Paula Moreno Mochi, Marcelo Signorini, Ariel Roge, Claudia Van Der Ploeg, Gerardo Leotta, María Ángela Jure
This work focused on the comprehensive study of two provincial transit abattoirs in Tucumán, Argentina, with no Hazard Analysis Critical Control Point (HACCP) plan. Visits (n = 20) were conducted between 2016 and 2018 during the operational and post-operational processes. Risk was estimated and the bacteriological analysis of carcass and environmental samples was performed. Risk estimation showed the
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Effect of glyphosate and ciprofloxacin exposure on enteric bacteria of tadpoles Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-01-20 Ana P. Cuzziol Boccioni, Guillermo García-Effron, Paola M. Peltzer, Rafael C. Lajmanovich
The high load of agrochemicals and antibiotics present in agricultural aquatic environments represents a risk for wildlife. Since enteric bacteria, which play a key role in the physiological functioning of their hosts, are sensitive to a wide variety of pollutants, their study allows to evaluate the health of organisms. This study aimed to evaluate the effects of commercial formulations of a glyphosate-based
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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 Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-01-17 Paula M. Favaro, Ana Molineri, Maria J. Dus Santos, Luis F. Calvinho, Andrea Pecora
Bovine pestiviruses are the causative agents of bovine viral diarrhea, a disease that causes severe economic losses in cattle. The aim of this study was to improve their diagnosis by developing a RT-qPCR to detect bovine pestiviruses A, B and H; and to set up a protocol for collecting, shipping and preserving bovine pestiviral RNA on filter papers. The developed RT-qPCR showed high sensitivity in detecting
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Actinomyces europaeus (Gleimia europaea) asociado con absceso cerebral: comunicación de tres casos Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-01-13 Carla Álvarez, Marisa Almuzara, Claudia Tosello, Daniel Stecher, Carlos Vay, Claudia Barberis
El absceso cerebral es una infección focal caracterizada por acumulación de pus en el parénquima cerebral; su diagnóstico es de urgencia debido a la alta mortalidad que acarrea. Presentamos tres casos de pacientes con abscesos cerebrales con foco otogénico de origen polimicrobiano, que presentaron en común el aislamiento de Actinomyces europaeus, agente no descrito hasta el momento en esta localización
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Enfermedad del legionario en Argentina: evolución de la estrategia diagnóstica en el laboratorio Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-01-03 Lucía Cipolla, Florencia Rocca, Rita Armitano, Beatriz López, Mónica Prieto
La enfermedad del legionario (EL) es una neumonía aguda grave, que ocurre esporádicamente o como epidemias, y que, generalmente, requiere hospitalización. El objetivo de este trabajo fue describir la experiencia en el abordaje diagnóstico de laboratorio de la EL en Argentina durante el período 2016-2021. Se analizaron 168 especímenes clínicos correspondientes a 93 casos de neumonía con sospecha de
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Mycoparasitic interaction between Trichoderma afroharzianum strain Th2RI99 and Rhizoctonia solani Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-01-03 Eliana Melignani, Mara E. Martin, Vanesa Y. Mema, Catalina B. Taibo, Julia V. Sabio y García, Viviana A. Barrera
Abstract not available
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First molecular characterization of Escherichia coli O157:H7 isolates from clinical samples in Paraguay using whole-genome sequencing Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-01-02 Natalie Weiler, Lucia Jazmín Martínez, Josefina Campos, Tomas Poklepovich, Maria Veronica Orrego, Flavia Ortiz, Mercedes Alvarez, Karina Putzolu, Gisela Zolezzi, Elisabeth Miliwebsky, Isabel Chinen
Escherichia coli O157:H7 is a foodborne pathogen implicated in numerous outbreaks worldwide that has the ability to cause extra-intestinal complications in humans. The Enteropathogens Division of the Central Public Health Laboratory (CPHL) in Paraguay is working to improve the genomic characterization of Shiga toxin-producing E. coli (STEC) to enhance laboratory-based surveillance and investigation
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Characterization of a Clostridioides difficile ST-293 isolate from a recurrent infection in Argentina Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-01-02 P. Cecilia Soldavini Pelichotti, Daniela Cejas, Liliana Fernández-Caniggia, Fernando M. Trejo, Pablo F. Pérez
Clostridioides difficile is an opportunistic spore-forming pathogen responsible for antibiotic-associated diarrhea in humans. C. difficile produces two main toxins: TcdA and TcdB as well as a third toxin named binary toxin (CDT) that is also involved in virulence. The present study aimed at characterizing the C. difficile isolate ALCD3 involved in a relapse episode of nosocomial infection. Molecular
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The rising threat of intrinsically resistant Candida species in Argentina. Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2023-01-01 By Guillermo Garcia-Effron
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Un patógeno fúngico emergente multirresistente en Argentina Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2022-12-14 Norma B. Fernandez
Abstract not available
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Microbiological and chemical characterization of water kefir: An innovative source of potential probiotics for bee nutrition Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2022-12-05 María A. Rodríguez, Leticia A. Fernández, Marina L. Díaz, Mónica Pérez, Miguel Corona, Francisco J. Reynaldi
We evaluated the microbial composition of water kefir grains and beverage over the course of one year to determine whether the number and type of microorganisms changed over the time. Bacteria and yeast colonies with different morphologies were isolated from water kefir and their antimicrobial activity was evaluated against Paenibacillus larvae and Ascosphaera apis. A chemical characterization of kefir
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Candida albicans the main opportunistic pathogenic fungus in humans Revis. Argent. Microbiol. (IF 1.9) Pub Date : 2022-11-18 Ignacio Uriel Macias-Paz, Salvador Pérez-Hernández, Alejandra Tavera-Tapia, Juan Pedro Luna-Arias, José Eugenio Guerra-Cárdenas, Elizabeth Reyna-Beltrán
Candida albicans is a commensal of the mammalian microbiome and the primary pathogenic fungus of humans. It becomes a severe health problem in immunocompromised patients and can cause a wide variety of mucosal and systemic infections. The interaction between C. albicans and host cells is characterized by the expression of virulence factors such as adhesins and invasins, the secretion of hydrolytic