Natural Mutation of PrfA K10N/T151A Enhances Serotype 4h Virulence.

PrfA is a key virulence regulator for (Lm) responding to host environment. Here we report that the natural mutation in PrfA enhanced the pathogenicity of hypervirulent serotype 4h . We characterized the phylogenetic tree of PrfA, and found that PrfA prevalently distributed in all serotype 4h isolates.

Nonviral targeted mRNA delivery: principles, progresses, and challenges.

Messenger RNA (mRNA) therapeutics have garnered considerable attention due to their remarkable efficacy in the treatment of various diseases. The COVID-19 mRNA vaccine and RSV mRNA vaccine have been approved on the market. Due to the inherent nuclease-instability and negative charge of mRNA, delivery systems are developed to protect the mRNA from degradation and facilitate its crossing cell membrane to express functional proteins or peptides in the cytoplasm.

Population Pharmacokinetics and Dosing Optimization of Norvancomycin for Chinese Patients with Community-Acquired Pneumonia.

Purpose: Determining the optimal dosage of norvancomycin (NVCM) for Chinese patients with community-acquired pneumonia (CAP) caused by gram-positive cocci remains uncertain. This research aimed to identify influential factors affecting NVCM pharmacokinetics and explore optimal dosage regimens via population pharmacokinetic (PPK) analysis.

Patients And Methods: A prospective analysis was conducted at the Second Hospital of Hebei Medical University (Shijiazhuang, China).

Bacillus licheniformis B410 Alleviates Inflammation Induced by Lipopolysaccharide and Salmonella by Inhibiting NF-κB and IRF Signaling Pathways in Macrophages.

Foodborne bacterial enteritis is a common clinical disease, and its incidence has risen globally. To screen for functional Bacillus strains with anti-inflammatory properties, tolerance to acid and bile salts, and antagonism against Salmonella, 22 strains of Bacillus were employed as candidate strains in this study. An inflammatory cell model was established using J774-Dual NF-κB/IRF reporter macrophages to identify anti-inflammatory Bacillus.

Prevalence and transmission of Salmonella collected from farming to egg processing of layer production chain in Jiangsu Province, China.

Salmonella is a common foodborne pathogen found in poultry production systems. Contaminated poultry products are a major source of human salmonellosis. Understanding the conditions of contamination and the genetic relationships of Salmonella in poultry production is necessary to develop effective interventions measures for controlling Salmonella transmission.