The fexA gene in Campylobacter: whether the spread has occurred among various hosts in eastern China.

Objectives: The emergence of the florfenicol resistance gene fexA in Campylobacter poses a serious threat to public health, but the extent of the spread of fexA in Campylobacter from various hosts has not been well understood. This study aimed to investigate the fexA in Campylobacter isolates from different hosts.

Methods: PCR was used to identify fexA-positive Campylobacter from different hosts during 2008-2019 in China, and the fexA-positive isolates were characterized by susceptibility tests, whole-genome sequencing, and natural transformation.

Genomic Insights into Pangenome and Antimicrobial Resistance in spp. Isolated from Chickens at Specific Growth Stages.

Improved understanding of the genetic basis of spp. colonization of poultry at specific growth stage is the key to developing a farm-based strategy to prevent flock colonization. In this study, 39 spp.

Genomic Relatedness, Antibiotic Resistance and Virulence Traits of HS19 Isolates From Cattle in China Indicate Pathogenic Potential.

Although campylobacteriosis is a zoonotic foodborne illness, high-risk isolates from animal sources are rarely characterized, and the pathogenic potential of zoonotic strains remains an obstacle to effective intervention against human infection. HS19 has been acknowledged as a maker serotype represented by () isolates from patients with post-infection Guillain-Barré syndrome (GBS), which is circulation in developed countries. However, a previous serotype epidemiological study of isolates in an animal population revealed that HS19 was also prevalent in isolates from cattle in China.

Investigating the role of BN-domains of FlhF involved in flagellar synthesis in Campylobacter jejuni.

FlhF protein is critical for intact flagellar assembly in Campylobacter jejuni. It is a putative GTPase with B-, N- and G-domains. However, the role of the B- and N-domains in flagella biosynthesis remains unclear in C.

Photoelectric effect of hybrid ultraviolet-sensitized phototransistors from an n-type organic semiconductor and an all-inorganic perovskite quantum dot photosensitizer.

Low-dimensional all-inorganic perovskite quantum dots (QDs) have been increasingly developed as photo-sensing materials in the field of photodetectors because of their strong light-absorption capability and broad bandgap tunability. Here, solution-processed hybrid phototransistors built by a dithienothiophenoquinoid (DTTQ) n-type organic semiconductor transport channel mixing with a colloidal CsPbBr perovskite QD photosensitizer are demonstrated by manipulating the relative volume ratio from 10 : 0 to 9 : 1, 7 : 3, 5 : 5, 3 : 7, 1 : 9, and 0 : 10. This results in a significantly enhanced photodetection performance owing to the advantages of a high UV absorption cross-section based on the perovskite QDs, efficient carrier transport abilities from the DTTQ semiconductor, and the photogating effect between the bulk heterojunction photocarrier transfer interfaces.

Feeding Malic Acid to Chickens at Slaughter Age Improves Microbial Safety with Regard to .

This study supplied malic acid-supplemented drinking water to flocks that were naturally -positive and assessed the effect of feeding malic acid to chickens on reduction and poultry production. In Experiment 1, chickens were provided with malic acid-supplemented drinking water for three weeks. The contamination loads of were decreased by 0.

Stable Perovskite Solar Cells Using Molecularly Engineered Functionalized Oligothiophenes as Low-Cost Hole-Transporting Materials.

Triarylamine-substituted bithiophene (BT-4D), terthiophene (TT-4D), and quarterthiophene (QT-4D) small molecules are synthesized and used as low-cost hole-transporting materials (HTMs) for perovskite solar cells (PSCs). The optoelectronic, electrochemical, and thermal properties of the compounds are investigated systematically. The BT-4D, TT-4D, and QT-4D compounds exhibit thermal decomposition temperature over 400 °C.

Investigating the Role of FlhF Identifies Novel Interactions With Genes Involved in Flagellar Synthesis in .

FlhF is a key protein required for complete flagellar synthesis, and its deletion results in the complete absence of a flagella and thus motility in . However, the specific mechanism still remains unknown. In this study, RNA-Seq, EMSAs, ChIP-qPCR and β-Galactosidase assays were performed to elucidate the novel interactions between FlhF and genes involved in flagellar synthesis.

Insights into the impact of flhF inactivation on Campylobacter jejuni colonization of chick and mice gut.

Background: Campylobacter jejuni (C. jejuni) is a leading cause of foodborne gastroenteritis worldwide. This bacterium lacks many of the classical virulence factors, and flagellum-associated persistent colonization has been shown to be crucial for its pathogenesis.