[Identification and antibiotic susceptibility of Aeromonas spp. in a University Hospital in the city of Buenos Aires].

Aeromonas spp. are opportunistic pathogens that cause both intra- and extraintestinal infections. The objective of this work was the phenotypic and genotypic characterization of a collection of Aeromonas strains, in addition to determining their sensitivity to different antimicrobials.

[Atypical non-Typhi Salmonella enterica bacteremia, lactose-positive, lysine decarboxylase-negative].

We describe here the first isolation in Argentina of a lactose-fermenting and lysine decarboxylase-negative non-Typhi Salmonella enterica from a blood culture of a patient with systemic lupus erythematosus. The microorganism was identified as S. enterica (score: 2.

NDM-5-producing Klebsiella pneumoniae ST258 in a university hospital in Argentina.

Background: A drastic increase in carbapenem resistance among Klebsiella pneumoniae isolates occurred during the period 2019-22. Three epidemiological changes could be evidenced: (i) NDM became the predominant carbapenemase; (ii) NDM-5 replaced NDM-1; and (iii) the emergence of NDM-producing K. pneumoniae ST258 (NDM-KpST258).

First report of abdominal sepsis caused by a recently described species: Chimaeribacter arupi.

We present a case of a 34-year-old patient with abdominal sepsis caused by an infrequent species: Chimaeribacter arupi. Genomic analysis confirmed the identification which is difficult to achieve by other methods so far. To our knowledge, this represents the first case of infection by this species reported in Argentina.

spp: the emergence of a new genus of healthcare-associated Enterobacterales encoding carbapenemases in Argentina: a case series.

Members of the genus (order ) are isolated from the natural environment and clinical settings. Identification of strains based on biochemical characteristics is complicated due to taxonomic confusion, and they are often misidentified by automated identification systems in laboratories. In this study we describe the first three clinical cases associated with spp.