Publications by authors named "Kewei Fan"

Since the first isolation of the porcine reproductive and respiratory syndrome virus 1 (PRRSV-1) BJEU06-1 strain from a Beijing pig farm in 2006, more and more PRRSV-1 isolates have been identified in China. In this study, we performed the routine detection of PRRSV-1 using 1521 clinical samples collected in 12 provinces/cities from February 2022 to May 2024. Only three lung samples from severely diseased piglets collected in January 2024 were detected as PRRSV-1-positive (0.

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  • * Phylogenetic studies categorize TMUV into four lineages, with Cluster 2 being the most adapted to duck codon usage patterns, highlighting the influence of natural selection on its evolution.
  • * The virus shows lower adaptation to potential hosts like humans and mosquitoes, and analyses reveal that its genome undergoes significant changes to avoid immune responses, aiding its fitness in poultry.
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  • The study addresses the challenges of massive bleeding and bacterial infections in chronic wounds, particularly after trauma, and proposes an ideal wound dressing that can both stop bleeding and prevent infection.
  • A silk fibroin-based light-responsive film was developed that effectively promotes clotting by binding to blood platelets, resulting in significantly less blood loss in animal tests.
  • Additionally, the film shows light-controllable properties that enhance antibacterial effects and improve healing in infected burn wounds, with lower bacterial counts and reduced wound areas compared to control groups.
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Alterations in anion balance potential, along with the involvement of cation-chloride cotransporters, play pivotal roles in the development of hyperalgesia after peripheral nerve injury. Chloride voltage-gated channel seven (CLCN7) is the predominant member of the CLC protein family. Investigations on CLCN7 have focused primarily on its involvement in osteosclerosis and lysosomal storage disorders; nevertheless, its contribution to neuropathic pain has not been determined.

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  • Endometritis negatively impacts maternal reproductive health, making the study of natural compounds like naringin important for treatment due to their efficiency and low toxicity.
  • The research involved predicting naringin's pharmacological targets and pathways using network pharmacology, alongside animal experiments to assess its effects on inflammation and oxidative stress in uterine tissues.
  • Findings indicate that naringin reduces inflammation by inhibiting endoplasmic reticulum stress and the PI3K/AKT pathway, providing new insights into potential therapies for endometritis through traditional compounds.
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Biofilm is a group of heterogeneously structured and densely packed bacteria with limited access to nutrients and oxygen. These intrinsic features can allow a mono-species biofilm to diversify into polymorphic subpopulations, determining the overall community's adaptive capability to changing ecological niches. However, the specific biological functions underlying biofilm diversification and fitness adaptation are poorly demonstrated.

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Background: Staphylococcus aureus is a versatile pathogen that can cause a wide range of infections in humans. Biofilms play a crucial role in the pathogenicity of S. aureus and contribute to its ability to cause persistent and chronic infections.

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The earth pressure acting on soilbag-reinforced retaining structures subjected to surcharge loads under non-limited states is crucial for designing these structures. In this study, mode tests on soilbag-reinforced retaining walls were conducted to the earth pressure of the wall subjected to surcharge loads. The findings from these tests reveal a non-linear distribution of lateral earth pressure on the wall when subjected to surcharge loads in non-limited states, with an observed escalation in pressure corresponding to increased surcharge loads.

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Porcine parvovirus (PPV) is an important pathogen causing reproductive disorders in sows, with clinical symptoms including stillbirth, mummified fetuses, embryonic dysplasia and death, and sow infertility. Porcine parvovirus 7 (PPV7) is a recently discovered type of PPV and its widespread distribution and rapid evolution has caused huge economic losses in the pig industry. To investigate the molecular epidemiology of PPV7 in Fujian Province, China, we collected 491 blood samples and 72 tissue samples from diseased pigs in large-scale pig farms across selected areas of Fujian Province from 2019 to 2022.

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is the major cause of invasive neonatal infections and is a recognized pathogen associated with various diseases in nonpregnant adults. The emergence and spread of antibiotic-resistant necessitate the development of a novel antibacterial agent. Here, the potential antibacterial activities and mechanisms of ginkgolic acid C15:1 (GA (15:1)) from against clinical are characterized.

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Porcine reproductive and respiratory syndrome virus 1 (PRRSV-1) has been prevalent in more than 20 provinces of China. However, no PRRSV-1-specific vaccine is commercially available in China. To evaluate the feasibility of using a low virulent PRRSV-1 isolate against potential outbreaks caused by virulent Chinese PRRSV-1 isolates, here we evaluated the efficacy of a low virulent PRRSV-1 HLJB1 strain isolated in 2014 as live vaccine against a virulent PRRSV-1 SD1291 strain isolated in 2022.

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  • A study examined 27 families of mammalian viruses from 1,981 wild animals and 194 zoo animals in South China, isolating and characterizing 8 viruses over 7 years.
  • Bats were found to carry a wide variety of viruses, including coronaviruses, picornaviruses, and potentially new virus genera, indicating a high viral diversity.
  • The research highlighted the risk of virus transmission between wildlife and domestic animals, emphasizing the complexities of wildlife protection and disease control efforts.
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Parasitic infections of the South China tigers in the Meihua Mountains have not been explored previously. Faeces of 22 South China tigers from the China Tiger Park in the Meihua Mountains were examined. Eggs of ascaridoid nematodes and oocysts of coccidia were detected by Mini-FLOTAC assay.

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Wildlife is essential to the biodiversity of the Meihua mountain, southwestern Fujian province, China. However, there have been few surveys of the distribution of ixodid ticks (Acari: Ixodidae) and tick-borne pathogens affecting wild animals at these locations. In this study, 1197 adult ixodid ticks infesting wild boars were collected from 10 sampling sites during 2019.

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Canine distemper virus (CDV), a non-segmented single negative-stranded RNA (ssRNA), is the etiological agent of canine distemper. Canine distemper is a highly contagious and lethal viral disease in domestic dogs and wild carnivores. Study of the evolution of CDV presents an essential key to improve the vaccine efficacy.

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Objectives: The aim of this study was to determine the mechanisms and molecular characterisation of one strain (HPS412) of Haemophilus parasuis, which exhibited high MICs of antimicrobial susceptibility.

Methods: A total of 113 H. parasuis strains isolated from pigs suffering from polyserositis, pneumonia or meningitis in China and screened them for antimicrobial susceptibility.

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Porcine circovirus 2 (PCV2) has been prevalent in swine herds in China since 2002, causing severe economic loss to the pig industry. The number of live pigs in southeast China is > 20 million. Since information on the genetic variation of PCV2 in the Fujian province is limited, the objective of the present work was to investigate the epidemiological and evolutionary characteristics of PCV2 in southeast China from 2013 to 2017.

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Porcine reproductive and respiratory syndrome (PRRS) is considered one of the most devastating swine diseases worldwide, resulting in immense economic losses. PRRS virus (PRRSV) is divided into two major genotypes, European (type 1) and the North American (type 2). Type 1 PRRSV have recently emerged in Fujian province (South China), and this might have a significant impact on the Chinese pig industry.

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Although the T-cell-mediated immune response to influenza virus has been studied extensively, little information is available on the direct interaction between influenza virus and T-cells that pertains to severe diseases in humans and animals. To address these issues, we utilized the BALB/c mouse model combined with primary T-cells infected with A/WSN/33 influenza virus to investigate whether influenza virus has an affinity for T-cells in vivo. We observed that small proportions of CD4(+) T-cells and CD8(+) T-cells in spleen and thymus expressed viral proteins in infected mice.

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