Identification of a genomic cluster related to hypersecretion of intestinal mucus and mucinolytic activity of atypical enteropathogenic (aEPEC).

Enteropathogenic (EPEC) strains are subdivided into typical (tEPEC) and atypical (aEPEC) according to the presence or absence of a virulence-associated plasmid called pEAF. Our research group has previously demonstrated that two aEPEC strains, 0421-1 and 3991-1, induce an increase in mucus production in a rabbit ileal loop model . This phenomenon was not observed with a tEPEC prototype strain.

Comparative in vitro activity of Delafloxacin and other antimicrobials against isolates from patients with acute bacterial skin, skin-structure infection and osteomyelitis.

The aim of this study was to compare the in vitro activity of delafloxacin with other fluoroquinolones against bacterial pathogens recovered from inpatients with osteomyelitis, Acute Bacterial Skin and Skin-Structure Infections (ABSSSI). In total, 100 bacterial isolates (58 % Gram-negative and 42 % Gram-positive) recovered from inpatients between January and April 2021, were reidentified at species level by MALDI-TOF MS. Antimicrobial susceptibility testing was conducted using the broth microdilution method and the detection of biofilm formation was assessed through the microtiter plate assay.

Detection of virulent Klebsiella pneumoniae strains causing intestinal and extraintestinal infections during the 80s and 90s in Brazil.

Klebsiella pneumoniae is an important pathogen that causes several human infections, which is currently among the main bacterial species of clinical importance. Given the importance of understanding the characteristics of this pathogen and its evolutionary aspects, in this study, we sought to characterize strains of K. pneumoniae recovered in the 1980s and 1990s in São Paulo, Brazil.

Unravelling the genomic characteristics of a Klebsiella quasipneumoniae clinical isolate carrying bla.

Objective: Despite the increasing reports of bla in Enterobacterales in Brazil, comprehensive whole genome sequencing (WGS) data remain scarce. To address this knowledge gap, our study focuses on the characterization of the genome of an New Delhi Metallo-β-lactamase (NDM)-1-producing Klebsiella quasipneumoniae subsp. quasipneumoniae (KQPN) clinical strain isolated in Brazil.

Co-resistance to methicillin and clindamycin among coagulase-negative staphylococci isolates recovered from pet food in Brazil.

Pet food have been considered as possible vehicles of bacterial pathogens. The sudden boom of the pet food industry due to the worldwide increase in companion animal ownership calls for pet food investigations. Herein, this study aimed to determine the frequency, antimicrobial susceptibility profile, and molecular characteristics of coagulase-negative staphylococci (CoNS) in different pet food brands in Brazil.

Clonal dissemination of highly virulent strains producing KPC-2 in food-producing animals.

is a Gram-negative bacterium presenting intrinsic resistance to polymyxins that has emerged as an important human pathogen. Although previous studies reported the occurrence of multidrug-resistance (MDR) isolates in the nosocomial settings, herein, we described isolates of this extensively drug-resistant (XDR) species recovered from stool samples of food-producing animals in the Brazilian Amazon region. Three carbapenem-resistant strains were recovered from stool samples of poultry and cattle.

Capture ELISA for KPC Detection in Gram-Negative Bacilli: Development and Standardisation.

The detection of KPC-type carbapenemases is necessary for guiding appropriate antibiotic therapy and the implementation of antimicrobial stewardship and infection control measures. Currently, few tests are capable of differentiating carbapenemase types, restricting the lab reports to their presence or not. The aim of this work was to raise antibodies and develop an ELISA test to detect KPC-2 and its D179 mutants.

Human Colonization and Infection by : An Emerging and Underestimated Zoonotic Pathogen.

. is a known resident of the skin and mucous membranes and a constituent of the normal microbiota of dogs. It has also been recognized as an opportunistic and zoonotic pathogen that is able to colonize humans and cause severe diseases, especially in immunocompromised hosts.

Common pili promote the fitness and virulence of a hybrid aEPEC/ExPEC strain within diverse host environments.

Pathogenic subsets of include diarrheagenic (DEC) strains that cause disease within the gut and extraintestinal pathogenic (ExPEC) strains that are linked with urinary tract infections, bacteremia, and other infections outside of intestinal tract. Among DEC strains is an emergent pathotype known as atypical enteropathogenic (aEPEC), which can cause severe diarrhea. Recent sequencing efforts revealed that some strains possess genetic features that are characteristic of both DEC and ExPEC isolates.

In Vitro and In Vivo Synergism of Fosfomycin in Combination with Meropenem or Polymyxin B against KPC-2-Producing Clinical Isolates.

Fosfomycin disodium is a potential therapeutic option to manage difficult-to-treat infections, especially when combined with other antimicrobials. In this study, we evaluated the activity of fosfomycin in combination with meropenem or polymyxin B against contemporaneous KPC-2-producing clinical isolates (KPC-KPN). Synergistic activity was assessed by checkerboard (CKA) and time-kill (TKA) assays.

Virulence Profile, Antibiotic Resistance, and Phylogenetic Relationships among Strains Isolated from the Feces and Urine of Hospitalized Patients.

Extra-intestinal pathogenic (ExPEC) may inhabit the human gut microbiota without causing disease. However, if they reach extra-intestinal sites, common cystitis to bloodstream infections may occur, putting patients at risk. To examine the human gut as a source of endogenous infections, we evaluated the clonal diversity of 18 inpatients' guts and their relationship with strains isolated from urinary tract infection (UTI) in the same hospital.

Sequencing of : A Rapid and Inexpensive Method for Discriminating CC258 from Other Clones.

Typing carbapenem-resistant (CR-KPN) is crucial in controlling their dissemination and solving outbreaks. In this context, we searched for an effective, faster, and cheaper alternative technique to type KPN by analyzing the sequence. We analyzed the nucleotide sequences of chromosomal gene in 350 KPN genomes (70 per sequence type [ST] or clonal complex [CC]).

Antibiotypes and high frequency of toxin genes in methicillin-resistant Staphylococcus pseudintermedius from nares of dogs and dog guardians in Nigeria.

To determine the antibiotypes and frequency of toxin genes in methicillin-resistant Staphylococcus pseudintermedius (MRSP), 281 nasal swab samples were collected from dogs and dog guardians in Abakaliki, Southeastern Nigeria. Antimicrobial susceptibility testing was determined by disc diffusion technique while detection of toxin genes was carried out by PCR. Exactly 41 (28.

Genome sequencing of an XDR Klebsiella pneumoniae ST101 strain isolated from a Brazilian Amazon river.

Objective: Herein, this study aimed to perform the genomic characterization of a bla positive Klebsiella pneumoniae (KP1.1JP) strain isolated from the surface water of river located the Brazilian Amazon region.

Methods: Antimicrobial susceptibility testing was performed following BrCAST/EUCAST recommendations.

The Impact of Fetal Programming in Ewe Nutrition with Chromium Propionate or Calcium Salts of Palm Oil on the Meat Quality and Bone of the Progeny.

This study aimed to evaluate the inclusion of chromium propionate or calcium salts of palm oil in ewes' diet during the final third of gestation and lactation on progeny performance, carcass characteristics, non-carcass components, and bone density. Forty-three ewe, Santa Inês and Dorper breed, three ± one-year-old, and body weight 57 ± 10 kg were used. The experimental design was in casual blocks in three treatments, CTL treatment (n = 15) with starch from corn; CR (n = 15) diet CTL plus chromium propionate; PF (n = 13) diet CTL plus calcium salts of palm oil.

Comparative Phenotypic and Genomic Features of Staphylococci from Sonication Fluid of Orthopedic Implant-Associated Infections with Poor Outcome.

spp. remain the leading biofilm-forming agents causing orthopedic implant-associated infections (OIAI). This is a descriptive study of phenotypic and genomic features identified in clinical isolates of and coagulase-negative (CoNS) recovered from OIAIs patients that progressed to treatment failure.

Unravelling complex transposable elements surrounding bla in a Pseudomonas aeruginosa ExoU strain.

Objectives: We characterised the complex surrounding regions of bla in a Pseudomonas aeruginosa exoU+ strain (P-10.226) in Brazil.

Methods: Species identification was performed by MALDI-TOF MS, and the antimicrobial susceptibility profile was determined by broth microdilution based on European Committee on Antimicrobial Susceptibility Testing (EUCAST) breakpoints.

Molecular Epidemiology and Presence of Hybrid Pathogenic among Isolates from Community-Acquired Urinary Tract Infection.

Urinary tract infections (UTI) affect community and healthcare patients worldwide and may have different clinical outcomes. We assessed the phylogenetic origin, the presence of 43 virulence factors (VFs) of diarrheagenic and extraintestinal pathogenic , and the occurrence of hybrid strains among isolates from 172 outpatients with different types of UTI. Isolates from phylogroup B2 (46%) prevailed, followed by phylogroups A (15.

Decreased susceptibility to imipenem and ceftazidime in early virulent Raoultella spp. strains retrieved from human intestinal infections.

The genus Raoultella spp. is comprised of four species, namely, R. electrica, R.

Genomic analyses of ciprofloxacin-resistant Neisseria gonorrhoeae isolates recovered from the largest South American metropolitan area.

We sequenced 13 Neisseria gonorrhoeae isolates exhibiting distinct susceptibility profiles and which were recovered over 12 years in the metropolitan region of São Paulo, Brazil. Whole Genome Sequencing (WGS) was performed on an Illumina MiSeq™ 2 × 300 bp paired-end reads. Bioinformatics analyses were carried out using CGE, PATRIC, and BLAST databases for manual curation of obtained genomes.