Micronutrient availability alters growth and farnesol accumulation: implications for studies using RPMI-1640.

Unlabelled: Science is challenging because we do not know what we do not know. Commercial chemicals are often marketed with >99% purity, but 0.5-1% impurity can impact results and cloud data interpretation.

Multifocal pneumonia caused by : Insights from a human case study.

This case report describes a 43-year-old man who presented with respiratory distress and was diagnosed with an exacerbation of congestive heart failure and multifocal pneumonia caused by Microbiological work up of a respiratory sample identified the causative organism, prompting antibiotic treatment and recommending vaccination for his dog. This case emphasizes the need to consider diverse origins in respiratory infections for effective clinical management.

Skin abscess caused by : Case report and literature review.

We investigated a skin abscess caused by in a patient with comorbidities. Initial empirical therapy with Clindamycin did not yield a response, and follow-up culture revealed the presence of through MALDI-TOF and NGS. Since no CLSI or FDA breakpoints have been published for this strain, resistant gene screening of the genetic sequence showed the presence of the erm(X) gene (with 95 % identity).

Evolution of a Distinct SARS-CoV-2 Lineage Identified during an Investigation of a Hospital Outbreak.

The SARS-CoV-2 virus steadily evolves, and numerous antigenically distinct variants have emerged over the past three years. Tracking the evolution of the virus would help us understand the process that generates the diverse variants and predict the future evolutionary trajectory of SARS-CoV-2. Here, we report the evolutionary trajectory of a unique Omicron lineage identified during an outbreak investigation that occurred in a residence unit in the healthcare system.

Impact of improper sample handling on Cobas CT/NG testing platform with dual swab sample collection kit for detecting and .

The importance of this observation lies in its potential to directly impact testing outcomes and patient care. By identifying improper sample handling as a contributing factor to a substantial number of invalid results, we emphasize the need for meticulous adherence to recommended protocols during sample collection. Laboratories that overlook or are unaware of such deviations may inadvertently compromise the reliability and efficacy of their diagnostic processes, leading to misdiagnoses, delayed treatment, and patient dissatisfaction.

Diagnostic performance of DNA probe-based and PCR-based molecular vaginitis testing.

Using retrospective data from U.S. Food and Drug Administration-approved/cleared molecular vaginal panels, molecular methods were found to have higher detection for vaginitis and lower detection for bacterial vaginitis when compared to probe-based methods.

Case of Extensively Drug-Resistant Shigella sonnei Infection, United States.

We report extensively drug-resistant (XDR) Shigella sonnei infection in an immunocompromised patient in Texas, USA. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry failed to identify XDR Shigella, but whole-genome sequencing accurately characterized the strain. First-line antimicrobials are not effective against emerging XDR Shigella.

bacteremia associated with diarrhea.

(C. coli) is a gram negative, non-spore forming, mobile, curved, or spiral-shaped rod organisms and one of the most common gastrointestinal human pathogens. Campylobacter very rarely causes bacteremia.

Extended Remdesivir Infusion for Persistent Coronavirus Disease 2019 Infection.

Persistent severe acute respiratory syndrome coronavirus 2 infection is difficult to treat. Here, we report a case of 5-month persistent coronavirus disease 2019 in an immunocompromised patient who was successfully treated with 30 consecutive days of remdesivir. Prolonged remdesivir infusion with concurrent cycle threshold monitoring might provide a potential solution to cure these patients with difficult-to-treat infections.

Presumptive positive with the Cepheid Xpert Xpress SARS-CoV-2 assay due to N mutations in the Delta variant.

The Cepheid Xpert® Xpress SARS-CoV-2 assay is 1 of the several real-time reverse transcription polymerase chain reaction (RT-PCR) assays that received Emergency Use Authorization from the United States Food and Drug Administration (FDA) for detection of SARS-CoV-2. Here we report 4 SARS-CoV-2 samples that were reported as presumptive positives on the Cepheid platform while reported as positives on alternative RT-PCR platforms. Whole genome sequencing indicated that the samples were Delta variants and had point mutations in the N gene which potentially interfered with SARS-CoV-2 detection.

Rare Lelliottia nimipressuralis from a wound infection case report using whole genome sequencing-based bacterial identification.

Identification of clinical bacterial isolates is an essential first step to provide guidelines for treatment of pathogenic bacterial infection. Infection occurred in a laceration along the medial aspect of left upper arm of a 71-year-old female. Conventional biochemical testing and MALDI-TOF MS identification failed to correctly identify a bacterial isolate.

Draft Genome Sequence of a Multidrug-Resistant Klebsiella pneumoniae Isolate from a Prosthetic Joint Infection.

Extended-spectrum β-lactamase (ESBL)-producing strain 9120005127 was isolated from a wound infection. We describe the draft genome sequence and antibiotic susceptibility of this strain.

Understanding false positives and the detection of SARS-CoV-2 using the Cepheid Xpert Xpress SARS-CoV-2 and BD MAX SARS-CoV-2 assays.

Several real-time RT-PCR assays have received Emergency Use Authorization from the United States Food and Drug Administration. The BD MAX™ SARS-CoV-2 assay, run by the BD MAX™ system, is a qualitative test that detects the SARS-CoV-2 specific nucleocapsid phosphoprotein gene regions, N1 and N2. The human RNase P gene is used as the endogenous nucleic acid extraction control.

Asynchronous Testing of 2 Specimen-Diversion Devices to Reduce Blood Culture Contamination: A Single-Site Product Supply Quality Improvement Project.

Objective: Blood culture contamination above the national threshold has been a consistent clinical issue in the ED setting. Two commercially available devices were examined that divert an initial small volume of the specimen before the collection of blood culture to reduce skin contamination.

Methods: Prospectively, 2 different blood culture-diversion devices were made available in the unit supplies to ED clinicians at a single site during 2 different periods of time as a follow-up strategy to an ongoing quality improvement project.

Clade-specific variation in susceptibility of to broad-spectrum ultraviolet C light (UV-C).

Background: Candida auris is an emerging and often multidrug-resistant fungal pathogen with an exceptional ability to persist on hospital surfaces. These surfaces can act as a potential source of transmission. Therefore, effective disinfection strategies are urgently needed.

Draft Genome Sequence of an Unusually Multidrug-Resistant Strain of Achromobacter xylosoxidans from a Blood Isolate.

strain DN2019 was isolated from blood of a septicemia patient. We describe the draft genome and antibiotic susceptibility of this strain.

Endothelial nitric oxide synthase limits host immunity to control disseminated Candida albicans infections in mice.

Three isoforms of nitric oxide synthase (NOS) occur in mammals. High levels of NO produced by NOS2/iNOS can protect against bacterial and parasitic infections, but the role of NOS in fungal innate immunity is less clear. Compared to wild type mice, Nos3-/- mice showed significantly higher survival of candidemia caused by Candida albicans SC5314.

Disseminated Invasive Candidiasis in an Immunocompetent Host.

Health care providers should consider a nonbacterial source as the causative agent for invasive candidiasis infection in immunocompetent patients.

Candida albicans ISW2 Regulates Chlamydospore Suspensor Cell Formation and Virulence In Vivo in a Mouse Model of Disseminated Candidiasis.

Formation of chlamydospores by Candida albicans was an established medical diagnostic test to confirm candidiasis before the molecular era. However, the functional role and pathological relevance of this in vitro morphological transition to pathogenesis in vivo remain unclear. We compared the physical properties of in vitro-induced chlamydospores with those of large C.

Imaging Candida Infections in the Host.

Disseminated fungal infections caused by Candida species are associated with homing of the pathogen to specific organs in human and murine hosts. Kidneys are a primary target organ of Candida albicans, and invasion into the kidney medulla can lead to loss of renal function and death. Therefore, development of noninvasive methods to assess kidney infections could aid in the management of disseminated candidemia.

CD47 Promotes Protective Innate and Adaptive Immunity in a Mouse Model of Disseminated Candidiasis.

CD47 is a widely expressed receptor that regulates immunity by engaging its counter-receptor SIRPα on phagocytes and its secreted ligand thrombospondin-1. Mice lacking CD47 can exhibit enhanced or impaired host responses to bacterial pathogens, but its role in fungal immunity has not been examined. cd47-/- mice on a C57BL/6 background showed significantly increased morbidity and mortality following Candida albicans infection when compared with wild-type mice.

MRI confirms loss of blood-brain barrier integrity in a mouse model of disseminated candidiasis.

Disseminated candidiasis primarily targets the kidneys and brain in mice and humans. Damage to these critical organs leads to the high mortality associated with such infections, and invasion across the blood-brain barrier can result in fungal meningoencephalitis. Candida albicans can penetrate a brain endothelial cell barrier in vitro through transcellular migration, but this mechanism has not been confirmed in vivo.

Endogenous thrombospondin-1 regulates leukocyte recruitment and activation and accelerates death from systemic candidiasis.

Disseminated Candida albicans infection results in high morbidity and mortality despite treatment with existing antifungal drugs. Recent studies suggest that modulating the host immune response can improve survival, but specific host targets for accomplishing this goal remain to be identified. The extracellular matrix protein thrombospondin-1 is released at sites of tissue injury and modulates several immune functions, but its role in C.

Urea amidolyase (DUR1,2) contributes to virulence and kidney pathogenesis of Candida albicans.

The intracellular enzyme urea amidolyase (Dur1,2p) enables C. albicans to utilize urea as a sole nitrogen source. Because deletion of the DUR1,2 gene reduces survival of C.