[Lyme's disease. A critical analysis of its presence in Argentina].

Introduction: Lyme disease (LD) is caused by bacteria of the Borrelia burgdorferi sensu lato complex and transmitted by the bite of ticks of the Ixodes ricinus complex. To date, no autochthonous cases have been reported in Argentina. Its diagnosis involves serological tests included in a two-step algorithm.

[Spotted fever in Argentina. Description of two clinical cases].

Rickettsioses are zoonotic tick-borne diseases. In Argentina, there are two epidemiological scenarios: jungle of Salta and Jujuy, involving vectors from the "Amblyomma cajennense Complex" (A. sculptum, and A.

[Development and evaluation of an in-house database for quick identification of Burkholderia contaminans by MALDI-TOF MS].

MALDI-TOF (matrix assisted laser desorption ionization-time of flight) mass spectrometry (MS) proved to be a robust tool for the identification of numerous taxonomic groups. However, it has limitations. A key advantage of this technique is the flexibility for the incorporation of protein profiles of microorganisms not included in the commercial database.

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

Draft Genome Sequences of Helicobacter pylori Strains HPARG63 and HPARG8G, Cultured from Patients with Chronic Gastritis and Gastric Ulcer Disease.

Helicobacter pylori colonizes the human gastric mucosa, leading to a spectrum of gastric diseases in susceptible populations. Here we announce the draft genome sequences of strains HPARG8G and HPARG63. The data for both genome sequences provide insights regarding the diversity in gene content and rearrangement of the genomic islands commonly harbored by H.

Helicobacter pylori heterogeneity in patients with gastritis and peptic ulcer disease.

Genetic diversification allows Helicobacter pylori to persist during chronic colonization/infection. We investigated the intra-host variation of several markers that suggested microevolution in patients with chonic gastritis (CG) and peptic ulcer disease (PUD). One-hundred twenty-six isolates recovered from 14 patients with CG and 13 patients with PUD were analysed.

Helicobacter pylori bab genes during chronic colonization.

Helicobacter pylori BabA adhesin metastability could yield variants with potential for periodic activation and deactivation of their mediated adherence. babA/B or babB/A chimeras could play an important role in translational regulation. We investigated the frequency of different bab gene profiles in paired isolates from antrum and corpus recovered from patients with chronic gastritis.

Helicobacter pylori oipA, vacA and dupA genetic diversity in individual hosts.

Helicobacter pylori putative virulence factors can undergo a continuously evolving mechanism as an approach to bacterial adaptation to the host changing environment during chronic infection. oipA, vacA and dupA genetic diversity among isolates from multiple biopsies (niches) from the antrum and corpus of 40 patients was investigated. A set of 229 isolates was examined.