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BMC Infect Dis ; 22(1): 558, 2022 Jun 19.
Artigo em Inglês | MEDLINE | ID: mdl-35718768


BACKGROUND: A global pandemic has been declared for coronavirus disease 2019 (COVID-19), which has serious impacts on human health and healthcare systems in the affected areas, including Vietnam. None of the previous studies have a framework to provide summary statistics of the virus variants and assess the severity associated with virus proteins and host cells in COVID-19 patients in Vietnam. METHOD: In this paper, we comprehensively investigated SARS-CoV-2 variants and immune responses in COVID-19 patients. We provided summary statistics of target sequences of SARS-CoV-2 in Vietnam and other countries for data scientists to use in downstream analysis for therapeutic targets. For host cells, we proposed a predictive model of the severity of COVID-19 based on public datasets of hospitalization status in Vietnam, incorporating a polygenic risk score. This score uses immunogenic SNP biomarkers as indicators of COVID-19 severity. RESULT: We identified that the Delta variant of SARS-CoV-2 is most prevalent in southern areas of Vietnam and it is different from other areas in the world using various data sources. Our predictive models of COVID-19 severity had high accuracy (Random Forest AUC = 0.81, Elastic Net AUC = 0.7, and SVM AUC = 0.69) and showed that the use of polygenic risk scores increased the models' predictive capabilities. CONCLUSION: We provided a comprehensive analysis for COVID-19 severity in Vietnam. This investigation is not only helpful for COVID-19 treatment in therapeutic target studies, but also could influence further research on the disease progression and personalized clinical outcomes.

COVID-19 , Infecções por Coronavirus , Pneumonia Viral , Betacoronavirus , COVID-19/tratamento farmacológico , COVID-19/epidemiologia , Estudo de Associação Genômica Ampla , Humanos , SARS-CoV-2/genética , Vietnã/epidemiologia
JGH Open ; 5(5): 580-584, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-34013058


BACKGROUND AND AIM: The risk factors associated with the increase in prevalence of gastroesophageal reflux disease (GERD) are not consistent across countries and there have been few studies in Asia in the past 10 years. This study was conducted to assess the features and risk factors of GERD in Vietnamese patients. METHODS: A cross-sectional study was conducted on 1947 out-patients ≥18 years of age who were presented with upper gastrointestinal symptoms and underwent esophagogastroduodenoscopy. Reflux esophagitis was graded according to the Los Angeles classification. Endoscopically suspected Barrett's esophagus (BE) was recorded according to the Prague C and M criteria and biopsy was taken for histologic examination. RESULTS: There were 511 (26.2%) patients with GERD, 242 (47.4%) with nonerosive reflux disease, and 269 (52.6%) with reflux esophagitis and/or BE. Epigastric pain, regurgitation, and heartburn were the chief complaints in 36.8%, 27.0%, and 9.2% of patients, respectively. Most of the patients with mucosal injury had reflux esophagitis in mild grade and BE in the form of C0M ≤2 (99.6%, 231/232 and 97.8%, 46/47, respectively). In multivariate analysis, hiatal hernia, male gender, waist-to-hip ratio (independent from general obesity), and smoking were risk factors for GERD while Helicobacter pylori infection was negatively associated with GERD. CONCLUSIONS: The majority of GERD patients had none or mild mucosal injury. Typical reflux symptoms, however, may not be the chief complaints. Central obesity would be more important than general obesity as a risk factor, while H. pylori infection was a "protective" factor for GERD in Vietnamese patients.

Medicine (Baltimore) ; 99(34): e21791, 2020 Aug 21.
Artigo em Inglês | MEDLINE | ID: mdl-32846811


The current barrier for investigation of Barrett esophagus (BE) in Asia is diagnostic standardization, which is a challenge to identify its true risk factors. This study aimed to investigate the prevalence, clinical characteristics and risk factors of BE in Vietnamese patients with upper gastrointestinal symptoms.A cross-sectional study was conducted on consecutive outpatients who underwent upper gastrointestinal endoscopy. Endoscopically suspected esophageal metaplasia (ESEM) which was clearly visible at least 1 cm above the gastroesophageal junction at endoscopy was taken biopsy. At least 1 biopsy per 2 cm in tongues of ESEM and 4 biopsies per 2 cm of circumferential ESEM were taken. The diagnostic criterion for BE was replacement of the normal squamous epithelial lining by columnar epithelium confirmed by histology.A total of 1947 patients were recruited. Forty-seven out of 58 patients with ESEM were histologically confirmed BE. The prevalences of BE and hiatal hernia (HH) were 2.4% (95% confidence interval [CI], 1.7-3.1%) and 2.3% (95% CI, 1.6-2.9%), respectively. Heartburn and/or regurgitation presented in only 61.7% (95% CI, 46.4-75.5%) of patients with BE. In multivariate analysis, the only 2 factors significantly associated with BE were HH (OR 7.53; 95% CI, 3.13-18.11; P < .001) and typical reflux symptom (OR 2.07; 95% CI, 1.12-3.83; P = .020).BE is not uncommon in Vietnamese patients with upper gastrointestinal symptoms. In addition, typical reflux symptoms and HH are the risk factors for BE in Vietnamese.

Esôfago de Barrett/epidemiologia , Esôfago de Barrett/patologia , Esôfago/patologia , Adulto , Esôfago de Barrett/diagnóstico por imagem , Biópsia , Estudos Transversais , Endoscopia Gastrointestinal , Feminino , Azia/epidemiologia , Hérnia Hiatal/epidemiologia , Humanos , Refluxo Laringofaríngeo/epidemiologia , Masculino , Metaplasia/diagnóstico por imagem , Metaplasia/patologia , Pessoa de Meia-Idade , Prevalência , Estudos Prospectivos , Fatores de Risco , Avaliação de Sintomas , Vietnã/epidemiologia
World J Gastroenterol ; 20(17): 5087-91, 2014 May 07.
Artigo em Inglês | MEDLINE | ID: mdl-24803823


AIM: To assess the value of a new test for the diagnosis of Helicobacter pylori (H. pylori) infection, Rapirun H. pylori Antibody Stick (Rapirun Stick), in a Vietnamese population. METHODS: Eligible patients without previous history of H. pylori eradication were recruited. Rapid urease test (RUT) and histologic examination were used to diagnose the H. pylori infection. Patients were considered H. pylori positive when the RUT results were positive and/or the bacteria were detected histologically. Rapirun Stick tests were performed using urine samples, and the results were compared with the other 2 methods. RESULTS: We enrolled 200 patients with a mean age of 36 (range, 18-76) years. There were 116 females and 84 males. Of the 200 patients, 111 (55.5%) were diagnosed as being H. pylori positive. The sensitivity, specificity, and accuracy of the Stick test were 84.7%, 89.9%, and 87.0%, respectively. There were 17 (8.5%) false-negative patients and 9 (4.5%) false-positive patients. CONCLUSION: The Rapirun Stick test has high sensitivity, specificity, and accuracy for the diagnosis of H. pylori infection in the Vietnamese population. The test can be clinically applied in Vietnamese populations.

Anticorpos Antibacterianos/urina , Ensaio de Imunoadsorção Enzimática/instrumentação , Infecções por Helicobacter/diagnóstico , Helicobacter pylori/imunologia , Fitas Reagentes , Urinálise/instrumentação , Adolescente , Adulto , Idoso , Biomarcadores/urina , Biópsia , Reações Falso-Negativas , Reações Falso-Positivas , Feminino , Gastroscopia , Infecções por Helicobacter/imunologia , Infecções por Helicobacter/microbiologia , Infecções por Helicobacter/urina , Humanos , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Reprodutibilidade dos Testes , Vietnã , Adulto Jovem