Publications by authors named "Viviana Vilches"

3 Publications

  • Page 1 of 1

[Corynebacterium kroppenstedtii breast infections: Report of four cases].

Rev Argent Microbiol 2021 Feb 21. Epub 2021 Feb 21.

Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Laboratorio de Bacteriología, Catedra de Microbiología Clínica, Hospital de Clínicas José de San Martin, Buenos Aires, Argentina. Electronic address:

Corynebacterium kroppenstedtii is an immobile, non-sporulated, glucose-fermenting and lipophilic gram-positive rod of the skin microbiota. In recent years, numerous isolates of this species have been reported mainly in breast infections, such as abscesses and granulomatous mastitis. We present here four cases of C. kroppenstedtii infections isolated from breast aspiration samples in women. C. kroppenstedtii was identified by conventional methodology and mass spectrometry (MALDI-TOF MS). Using the epsilometric method, these isolates showed susceptibility to penicillin, ceftriaxone, minocycline, ciprofloxacin, and vancomycin, and variable susceptibility to clindamycin and trimethoprim sulfamethoxazole. Due to the association of C. kroppenstedtii with mammary infections, the identification at the species level of those corynebacteria isolated from this location is highly advisable in order to reach the final diagnosis and to test the antimicrobial susceptibility in order to apply the appropriate antibiotic treatment.
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http://dx.doi.org/10.1016/j.ram.2021.01.002DOI Listing
February 2021

[Helicobacter cinaedi bacteremia: Presentation of the first cases reported in Argentina].

Rev Argent Microbiol 2019 Apr - Jun;51(2):148-152. Epub 2018 Sep 20.

INEI ANLIS Dr. Carlos G Malbrán-Bacteriología Especial, Buenos Aires, Argentina.

Two cases of bacteremia caused by Helicobacter cinaedi are presented. The first case was diagnosed in a 76-year-old male patient, and was secondary to a vascular access device placement; the second case corresponded to a febrile infant of 37 days of life, and was associated with acute gastroenteritis. H. cinaedi is a microorganism difficult to grow in different culture media and also to identify to species level. In both cases, the microscopic observation of blood culture bottles, the use of mass spectrometry and the subsequent sequencing of the hsp60 gene were essential. In the recent literature, H. cinaedi infections are being reported more frequently. In this report we present the first documented cases of bacteremia caused by H. cinaedi in Argentina.
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http://dx.doi.org/10.1016/j.ram.2018.06.002DOI Listing
January 2020

First clinical isolates of Cronobacter spp. (Enterobacter sakazakii) in Argentina: characterization and subtyping by pulsed-field gel electrophoresis.

Rev Argent Microbiol 2013 Jul-Sep;45(3):160-4

Servicio Enterobacterias, Departamento de Bacteriología, Instituto Nacional de Enfermedades Infecciosas (INEI) - ANLIS «Dr. Carlos G. Malbrán», Ciudad Autónoma de Buenos Aires, Argentina. Centro Nacional de Control de Calidad de Biológicos (CNCCB) - ANLIS «Dr. Carlos G. Malbrán», Ciudad Autónoma de Buenos Aires, Argentina.

Cronobacter species are opportunistic pathogens associated with severe infections in neonates and immunocompromised infants. From January 2009 through September 2010, two cases of neonatal infections associated with Cronobacter malonaticus and one case associated with Cronobacter sakazakii, two of them fatal, were reported in the same hospital. These are the first clinical isolates of Cronobacter spp. in Argentina. The objective of this work was to characterize and subtype clinical isolates of Cronobacter spp. in neonate patients, as well as to establish the genetic relationship between these isolates and the foodborne isolates previously identified in the country. Pulsed-field gel electrophoresis analysis showed a genetic relationship between the C. malonaticus isolates from two patients. Different results were found when the pulsed-field gel electrophoresis patterns of clinical isolates were compared with those deposited in the National Database of Cronobacter spp.
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http://dx.doi.org/10.1016/s0325-7541(13)70018-xDOI Listing
December 2013