Publications by authors named "Xi-Jun Yan"

Background: As population aging intensifies, it becomes increasingly important to elucidate the casual relationship between aging and changes in population health. Therefore, our study proposed to develop a systematic attribution framework to comprehensively evaluate the health impacts of population aging.

Methods: We used health-adjusted life expectancy (HALE) to measure quality of life and disability-adjusted life years (DALY) to quantify the burden of disease for the population of Guangzhou.

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  • The study looked at how mental health issues and everyday life affect violent behavior in people with schizophrenia.
  • Researchers analyzed data from 1,664 patients to see how their symptoms and real-life functioning connected before and after violence.
  • Results showed that after experiencing violence, connections between symptoms and daily life weakens, suggesting that this could be an early warning sign for future violence.
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Objective: In the context of aging, Chinese families consisting of more than three generations (grandparents, parents, children) are the norm. The second generation (parents) and other family members may establish a downward (contact only with children) or two-way multi-generational relationship (contact with children and grandparents). These multi-generational relationships may have the potential effect on multimorbidity burden and healthy life expectancy in the second generation, but less is known about the direction and intensity of this effect.

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  • This article analyzes how reducing disability and premature death from noncommunicable diseases (NCDs) can improve health-adjusted life expectancy (HALE) for individuals aged 30 to 70.
  • Utilizing data from the Global Burden of Disease Study 2019, the study evaluates three future scenarios related to achieving health goals concerning NCDs across various income levels.
  • The findings show that higher-income groups experience the largest potential increases in HALE, particularly from interventions targeting cancer and cardiovascular diseases, indicating that addressing both mortality and disability is crucial for enhancing overall health outcomes globally.
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Background: Quantitative attribution of the burden of disease due to population aging is an important part of setting meaningful global health priorities. This study comprehensively examines the burden of disease attributable to population aging in 188 countries from 1990 to 2019, incorporates a comprehensive range of diseases, and projects the burden of disease due to population aging till 2050.

Methods: We extracted data from 1990 to 2019 for 188 countries from the Global Burden of Disease Study 2019.

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  • The study explores the relationship between megacity expansion and the gap between health-adjusted life expectancy (HALE) and overall life expectancy (LE) in Guangzhou, China.
  • Despite increases in both LE and HALE, the gap between them is widening, indicating a decline in quality of life.
  • Factors like personal wealth, population growth, urbanization, and healthy aging are crucial for narrowing this gap, suggesting that multiple social determinants should be considered in public health planning.
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A novel neurological disorder, shaking mink syndrome (SMS), emerged in Denmark and Sweden in 2000. SMS has seldom been reported in China, but the causative agent has not been detected in the country. SMS outbreaks occurred in multiple provinces in 2020.

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China healthcare industry has gradually developed the consumer-centric integrated service model. To satisfy consumers' increasing demands on pluralistic, personalized and transparent healthcare services, pharmaceutical manufacturing enterprises must provide high-quality, precise and flexible medicines. This can be achieved by accelerating implementation of intelligent manufacturing, which is the core competitiveness of pharmaceutical manufacturing enterprises.

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We isolated Getah virus from infected foxes in Shandong Province, eastern China. We sequenced the complete Getah virus genome, and phylogenetic analysis revealed a close relationship with a highly pathogenic swine epidemic strain in China. Epidemiologic investigation showed that pigs might play a pivotal role in disease transmission to foxes.

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Getah virus (GETV) is a mosquito-borne alphavirus that is considered to be an emerging pathogen. To date, reverse transcription loop-mediated isothermal amplification (RT-LAMP) has not been used to detect GETV. Therefore, we describe a novel, fast, and sensitive LAMP method to detect GETV.

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Getah virus (GETV), a mosquito-borne virus that mainly infects horses and pigs, has emerged and spread in China. We developed a highly specific and reproducible TaqMan probe-based quantitative reverse transcription PCR (RT-qPCR) assay targeting the non-structural protein 1 of GETV, whose detection limit is 25.5 copies/µL, which is 100-fold higher than that of conventional RT-PCR.

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An outbreak of severe pseudorabies virus (PRV) infection in farmed mink occurred in northern China in late 2014, causing significant economic losses in the local fur industry. Here, we report the first case of a PRV outbreak in mink in northeastern China, caused by feeding farmed mink with raw pork or organs contaminated by PRV. Mink infected with virulent PRV exhibited diarrhea, neurologic signs, and higher mortality, which can be misdiagnosed as highly pathogenic mink enteritis virus (MEV), canine distemper virus (CDV), and food poisoning.

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Batai virus (BATV) is an arthropod-borne single-stranded RNA virus belonging to the genus Orthobunyavirus of the family Bunyaviridae that is primarily transmitted by mosquitoes. Methods for detecting BATV are currently limited to serological surveillance, virus isolation, and conventional reverse transcription-polymerase chain reaction (RT-PCR) assay. In this study, we sought to develop a BATV detection assay that needs no specialized equipment and is highly specific, sensitive, and simple.

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Background: As a key link between innate and adaptive immune responses, the interferon (IFN) system is the first line of defense against viral infection. IFN, and in particular, IFN-α, has been used clinically as an effective therapeutic agent for viral infections. However, different subtypes of IFN-α demonstrate distinct antiviral activity.

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  • The Batai virus (BATV), a vector-borne pathogen part of the Orthobunyavirus genus, exhibits genomic variations due to genetic reassortment and was first isolated from a mosquito in China.
  • In a study conducted in 2012, a BATV infection rate of 2.1% was observed in cattle in Inner Mongolia, with the complete genomic sequencing of a strain (NM/12) revealing significant nucleotide homologies with other BATV strains.
  • Phylogenetic analysis showed that the NM/12 strain is most closely related to certain Asian BATV strains and demonstrated distinct characteristics for its genomic segments, indicating a complex evolutionary history and potential regional differences.
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To recognize the molecular biology character, phylogenetic relationship and the state quo prevalent of Canine parvovirus (CPV), Faecal samnples from pet dogs with acute enteritis in the cities of Beijing, Wuhan, and Nanjing were collected and tested for CPV by PCR and other assay between 2006 and 2008. There was no CPV to FPV (MEV) variation by PCR-RFLP analysis in all samples. The complete ORFs of VP2 genes were obtained by PCR from 15 clinical CPVs and 2 CPV vaccine strains.

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Canine distemper virus (CDV) infects a variety of carnivores, including wild and domestic Canidae. Genetic/antigenic heterogeneity has been observed among the various CDV strains, notably in the haemagglutinin (H) gene, that appears as a good target to gather epidemiological information. Based on sequence analysis of the H gene, wild-type CDV strains cluster into distinct geographic lineages (genotypes), irrespective of the species of isolation.

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