Publications by authors named "Shihyen Chen"

Article Synopsis
  • * A study in Taiwan from 2010 revealed novel GII.12 outbreaks, where 30.5% of cases were linked to NoV, with GII.4 being the most prevalent (75.9%) and GII.12 at 17.2%.
  • * Patients infected with GII.12 experienced milder symptoms, including less frequent and shorter diarrhea episodes compared to those with GII.4, highlighting the need for ongoing research to understand NoV genotypes and their health impacts.
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Background: Early diagnosis and surgical intervention for midgut malrotation with bowel obstruction are crucial. We aimed to identify risk factors for adverse outcomes in infants with midgut malrotation and to develop a prediction model.

Methods: We reviewed the operation records of infants surgically diagnosed with midgut malrotation at Chang Gung Children's Medical Center between January 2000 and December 2020.

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Background: Real-time and appropriate antigen tests play a pivotal role in preventing severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection. However, a previous meta-analysis reported that the antigen test had lower sensitivity for the detection of SARS-CoV-2 in children. To provide a comprehensive evaluation of diagnostic efficiency, we performed an updated meta-analysis to assess the detection accuracy of SARS-CoV-2 antigen tests stratified by days after symptom onset and specimen type in children and adolescents.

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Norovirus infection is a leading cause of acute gastroenteritis worldwide and can also cause harmful chronic infections in individuals with weakened immune systems. The role of the gut microbiota in the interactions between the host and noroviruses has been extensively studied. While most past studies were conducted or focused on murine noroviruses, recent research has expanded to human noroviruses using or human intestinal enteroids culture studies.

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Coronaviruses can cause pneumonia, with clinical symptoms that may be similar to the symptoms of other viral pneumonias. To our knowledge, there have been no reports regarding cases of pneumonia caused by coronaviruses and other viruses among hospitalized patients in the past 3 years before and during coronavirus disease 2019 (COVID-19). Here, we analysed the causes of viral pneumonia among hospitalized patients during the coronavirus disease 2019 (COVID-19) pandemic (2019-2021).

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Human noroviruses (HuNoV) are major causes of acute gastroenteritis around the world. The high mutation rate and recombination potential of noroviruses are significant challenges in studying the genetic diversity and evolution pattern of novel strains. In this review, we describe recent advances in the development of technologies for not only the detection but also the analysis of complete genome sequences of noroviruses and the future prospects of detection methods for tracing the evolution and genetic diversity of human noroviruses.

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Background: Children and young adults with HIV infection may exhibit vitamin D deficiency, which is harmful to bone health as well as the endocrine and immune systems.

Objectives: This study sought to investigate the effect of vitamin D supplementation on children and young adults with HIV infection.

Methods: The PubMed, Embase, and Cochrane databases were searched.

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Background: Childhood cancer survivors are at a high risk of medical consequences of their disease and treatment. There is growing information about the long-term health issues of childhood cancer survivors; however, there are very few studies describing the health care utilization and costs for this unique population. Understanding their utilization of health care services and costs will provide the basis for developing strategies to better serve these individuals and potentially reduce the cost.

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Article Synopsis
  • The study evaluates the effectiveness of antigen tests for detecting SARS-CoV-2 in children, highlighting their importance in managing COVID-19 transmission.
  • It analyzed data from five studies involving 4,400 participants, revealing a pooled sensitivity of 65.9% and a high specificity of 99.9% for these tests.
  • Results indicate that while antigen tests are fairly effective, their sensitivity varies between symptomatic (64.5%) and asymptomatic (48.4%) individuals, suggesting room for improvement in diagnosis.
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Article Synopsis
  • The study investigates the clinical features of COVID-19 in pediatric patients in Taiwan, focusing on those aged 18 and under.
  • The research included 38 pediatric patients from a Northern Taiwan hospital between May and June 2021, finding that asymptomatic cases accounted for nearly half of the sample.
  • Key symptoms in symptomatic patients were fever, cough, nasal obstruction, and sore throat, with asymptomatic patients showing higher RT-PCR cycle threshold values, suggesting their infections may be less severe compared to symptomatic cases.
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Noroviruses (NoVs) are one of the emerging and rapidly spreading groups of pathogens threatening human health. A reduction in sporadic NoV infections was noted following the start of the COVID-19 pandemic, but the return of NoV gastroenteritis during the COVID-19 pandemic has been noted recently. Research in recent years has shown that different virus strains are associated with different clinical characteristics; moreover, there is a paucity of research into extraintestinal or unusual complications that may be associated with NoV.

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Background: Norovirus (NoV) infection is common in pediatric patients with immunodeficiency and is more likely to cause severe disease. Objective Our study aims to figure out the clinical differences and distribution of intestinal microbiota in immunocompromised children with NoV gastroenteritis.

Methods: Pediatric patients admitted to Shang-Ho Hospital with diagnosis of acute gastroenteritis including different immune status were enrolled and their medical records were reviewed.

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Background: The genogroups GI and GII of norovirus (NoV) ribonucleic acid (RNA) genetic variants are the most prevalent cause of acute gastroenteritis outbreaks, especially in children, worldwide. A fast, accurate and convenient tool for diagnosis of NoV may be preferable to the more complicated performance of real-time reverse transcription-polymerase chain reaction (RT-PCR).

Methods: In this study, we developed and evaluated a tool using insulated isothermal PCR (iiPCR)-mediated POCKIT Central NoV GI and NoV GII assay systems for diagnosis of NoV infection in pediatric patients suspected with gastroenteritis.

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Kawasaki disease (KD), also called mucocutaneous lymph node syndrome, is a febrile multisystem vasculitis mainly affecting children younger than 5 years. KD typically manifests as skin lesions and in the lymph nodes and oral and conjunctival mucosa. It may induce coronary artery abnormalities, such as aneurysms, but gastrointestinal and hepatobiliary involvement are not common.

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The human body is colonized by a wide range of microorganisms. The field of viromics has expanded since the first reports on the detection of viruses via metagenomic sequencing in 2002. With the continued development of reference materials and databases, viral metagenomic approaches have been used to explore known components of the virome and discover new viruses from various types of samples.

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Background: The correlation between the clinical manifestations and fecal viral load of norovirus (NoV) infection remains unknown.

Methods: We established a SYBR® Green-based real-time quantitative reverse transcriptase polymerase chain reaction (qRT-PCR) method to quantify NoV and then sequenced its genomes from the feces of patients admitted at the Chang Gung Memorial Hospital from 2017 to 2018.

Results: NoV GII.

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Objective: Severe pertussis infection has been reported in infants before receiving routine immunization series. This problem could be solved by vaccinating mothers during pregnancy or children at birth. This study aimed to conduct a systematic review and meta-analysis of randomized controlled trials (RCTs) and real-world evidence to evaluate the optimal strategy for pertussis vaccination.

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In Taiwan, rotavirus vaccination was implemented in 2006 in the private sector. The population-based impact of rotavirus vaccination on gastroenteritis and comorbidities of children remains under-investigated.We analyzed the annual prevalence of rotavirus-related disease, including gastroenteritis, convulsions, epilepsy, type I diabetes mellitus, intussusception, and biliary atresia among children under 5 years of age.

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Human norovirus (NoV) is the leading cause of acute gastroenteritis and the rapid transmission of NoV renders infection control problematic. Our study aimed to investigate viral shedding in gastroenteritis in children caused by variants of emerging norovirus strains infections.We used RNA-dependent RNA polymerase (RdRp) sequencing to measure NoV genome copies in stool to understand the relationship between the clinical manifestations and viral shedding in hospitalized patients.

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Hypertension in childhood and adolescence is associated with adult cardiovascular morbidity and mortality. However, the reported prevalence of pediatric hypertension varies considerably. We conducted a pioneer nationwide population-based study to investigate the prevalence of hypertension among children and adolescents.

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