Outer membrane vesicles (OMVs) from Tenacibaculum maritimum as a potential vaccine against fish tenacibaculosis.

Outer membrane vesicles (OMVs) have been gained increasing attention in vaccinology due to their ability to induce strong protective humoral and cell-mediated immunity. The Gram-negative bacterium Tenacibaculum maritimum, the causative agent of marine tenacibaculosis, poses a significant challenge to the global aquaculture industry due to its difficult prophylaxis. In previous studies, we demonstrated that OMV production is a key virulence mechanism in T.

Evaluation of the Analytical Performance of a Lateral Flow Assay for the Detection of Anti- Antibodies in Human Sera-Argentina.

Coccidiomycosis is a potentially life-threatening fungal infection endemic to certain regions of Argentina. The infection is caused by spp. and is primarily diagnosed by antibody (Ab) detection.

Mycological diagnosis of paracoccidioidomycosis in a hospital from a nonendemic area: classical and molecular methods.

Introduction: Paracoccidioidomycosis is a systemic mycosis endemic in Latin America. Climate change and host migration emphasize the need to optimize this infection diagnosis.

Objective: To evaluate the implementation of Paracoccidioides spp.

The secretome of the fish pathogen includes soluble virulence-related proteins and outer membrane vesicles.

, the etiological agent of tenacibaculosis in marine fish, constitutively secretes extracellular products (ECPs) in which protein content has not been yet comprehensively studied. In this work, the prevalence of extracellular proteolytic and lipolytic activities related to virulence was analyzed in 64 strains belonging to the O1-O4 serotypes. The results showed the existence of a great intra-specific heterogeneity in the enzymatic capacity, particularly within serotype O4.

Seroprevalence of sporotrichosis infection in cats living in the Buenos Aires epizootic area.

This study aimed to perform a seroepidemiological survey on the prevalence of sporotrichosis among cats living in the Northern area of Buenos Aires, where a four-fold increase of Sporothrix brasiliensis infections were diagnosed during the last decade. For this purpose, an in-house indirect ELISA test sensitized with S. brasiliensis crude antigens was used.

Role of the Vibriolysin VemA Secreted by the Emergent Pathogen in the Colonization of Manila Clam Mucus.

is an emergent pathogen affecting clams, oysters and scallops produced in the most important countries for bivalve aquaculture. Studies concerning virulence factors involved in the virulence of are very scarce despite its global significance for aquaculture. Zinc-metalloproteases have been described as a major virulence factor in some spp.

COVID-19 associated with disseminated histoplasmosis in a kidney transplant patient.

We report a case of disseminated histoplasmosis and COVID-19 infection in a renal transplant recipient in Argentina. The patient exhibited respiratory symptoms, and a chest computed tomography scan (CT) showed multiple bilateral centrilobular opacities with a tree-in-bud pattern in both lobes. The patient was initially treated as having bacterial community-acquired pneumonia, and then tuberculosis.

Biologically synthesized silver nanoparticles, mediated by Bothriochloa laguroides, inhibit biofilm formation and eradicate mature biofilm of Yersinia enterocolitica and Staphylococcus aureus.

Aims: To phytosynthesize silver nanoparticles (AgNPs) and determine their antibacterial and antibiofilm capacity against gram-positive and gram-negative bacterial strains.

Methods And Results: AgNPs were synthesized using Bothriochloa laguroides aqueous extract as reducing and stabilizing agent. After characterization, a phytochemical screening to the extract and the AgNPs was performed.

[Clinical and microbiological characteristics of bloodstream infections in adult neutropenic patients].

Bloodstream infections (BI) are relevant in neutropenic patients because they are associated with an increased number of complications and death. The objective was determinate the epidemiologic and microbiologic features of the BI in neutropenic patients with solid neoplasm (SN) and hematologic neoplasm (HN). Retrospective study in two third level hospitals between 2009 and 2016.

Effectiveness of the National Quality Control Program in Mycology of Argentina and performance evaluation of participating laboratories.

The National Quality Control Program in Mycology (PNCCM) of Argentina was established in 1996 to improve the quality of the mycological diagnosis, to help establish and to set up standardized procedures and continuous training of laboratory staff. The aim of this study was to assess the effectiveness of the PNCCM in the 1996-2018 period. Data from the National Mycology Laboratory Network (NMLN) and PNCCM database was used to estimate the increase in the number of controlled laboratories and jurisdictions, the percentage of participation, the improvement in the quality of results and the adherence to the program.

[Bloodstream infections in cancer patients].

Bloodstream infections (BI) are an important cause of morbidity and mortality in cancer patients. A retrospective study was performed in two hospitals aimed to evaluate characteristics of BI episodes occurred in adult patients with hematologic (HN) and solid (SN) neoplasia other than non-melanoma skin cancers in the period 2009-2016. A total of 467 episodes of bacteremia and 16 of fungemia were identified.

Use of an Argentinean Wildlife Tissue Collection for Epidemiological Studies of Histoplasmosis.

Histoplasmosis is a worldwide systemic endemic mycosis caused by several cryptic species included within the Histoplasma capsulatum complex. Domestic and wild mammals are susceptible to infection by this fungus and could be used as indicators of its presence in the environment. The aim of the study was to identify the natural reservoirs of H.

The Fish Pathogen Under Iron Deprivation Produces the Siderophore Piscibactin.

is the causative agent of vibriosis, mainly in salmonid fishes, and its virulence mechanisms are still not completely understood. In previous works we demonstrated that possess several iron uptake mechanisms based on heme utilization and siderophore production. The aim of the present work was to confirm the production and utilization of piscibactin as a siderophore by .

Evidence for the facultative intracellular behaviour of the fish pathogen Vibrio ordalii.

Vibrio ordalii is an extracellular, Gram-negative bacterium that produces vibriosis in salmonids. While pathogenesis is not fully understood, this bacterium has numerous likely genes for adhesion, colonization, invasion factors and, as recently suggested, intracellular behaviour. Therefore, this study aimed to clarify possible intracellular behaviour for V.

Mycosis Due to Tropicoporus tropicalis (= Inonotus tropicalis) in a Domestic Dog.

Mycelial basidiomycetes rarely produce mycoses in animals including humans. We report a case of a 9-year-old female mongrel dog with lesions in the prescapular lymph nodes. The histopathology of a lymph node sample showed flexuous septate hyphae, and a sterile mold grew in culture from that specimen.

Edwardsiella piscicida: a significant bacterial pathogen of cultured fish.

Edwardsiella piscicida, a Gram-negative, facultative aerobic pathogen belonging to the Enterobacteriaceae family, is the etiological agent of edwardsiellosis in fish and a significant problem in global aquaculture. E. piscicida has been reported from a broad geographical range and has been isolated from more than 20 fish host species to date, but this is likely to be an underestimation, because misidentification of E.

Genetic studies to re-affiliate Edwardsiella tarda fish isolates to Edwardsiella piscicida and Edwardsiella anguillarum species.

Until 2012, the genus Edwardsiella was composed by three species Edwardsiella tarda, Edwardsiella hoshinae and Edwardsiella ictaluri. In 2013, Edwardsiella piscicida, compiling fish pathogenic strains previously identified as E. tarda was described, and more recently a new species isolated from diseased eel was reported, namely Edwardsiella anguillarum.

Draft Genome Sequence of Strain ACC35.1 Isolated from Diseased Turbot () in Europe.

is a bacterial fish pathogen with a high degree of virulence. The strain ACC35.1 was isolated from diseased turbot in Europe.

Survival behaviour and virulence of the fish pathogen Vibrio ordalii in seawater microcosms.

Vibrio ordalii, the causative agent of atypical vibriosis, is a Gram-negative, motile, rod-shaped bacterium that severely affects the salmonid aquaculture industry. V. ordalii has been biochemically, antigenically and genetically characterized.

Iron assimilation and siderophore production by Vibrio ordalii strains isolated from diseased Atlantic salmon Salmo salar in Chile.

Vibrio ordalii is the causative agent of vibriosis in several cultured salmonid species worldwide. Despite its impact on aquaculture, relatively little information is available about its virulence factors. The present study demonstrates for the first time that V.

Insights into the virulence-related genes of Edwardsiella tarda isolated from turbot in Europe: genetic homogeneity and evidence for vibrioferrin production.

Edwardsiella tarda has long been known as a pathogen that causes severe economic losses in aquaculture industry. Insights gained on E. tarda pathogenesis may prove useful in the development of new methods for the treatment of infections as well as preventive measures against future outbreaks.

Molecular identification of Coccidioides immitis in formalin-fixed, paraffin-embedded (FFPE) tissues from a Colombian patient.

Coccidioides immitis and C. posadasii are the etiologic agents of coccidioidomycosis, an endemic fungal disease of the Americas. In Colombia, this mycosis is uncommon, and only five cases, two of them imported, have been documented.

Cell-surface properties of Vibrio ordalii strains isolated from Atlantic salmon Salmo salar in Chilean farms.

Vibrio ordalii is the causative agent of atypical vibriosis and has the potential to cause severe losses in salmonid aquaculture, but the factors determining its virulence have not yet been elucidated. In this work, cell-surface-related properties of the isolates responsible for outbreaks in Atlantic salmon were investigated. We also briefly examined whether pathogenicity against fish varied for V.