Active clinical trials for "Communicable Diseases"

This is a two-way (retrospective and prospective) study of COVID-19 infection in an observational cohort of patients with chronic hepatitis B treated with antiviral therapy. Patients with chronic hepatitis B who received anti-HBV treatment in the Second Department of Hepatology, Beijing Ditan Hospital Affiliated to Capital Medical University from February 2022 to December 2023 were enrolled. After enrollment, demographic data of patients, information on antiviral treatment of chronic hepatitis B, COVID-19 vaccination, COVID-19 infection and COVID-19 incidence and treatment from January 2022 to pre enrollment, and data on HBV virus and serology, clinical biochemistry, liver and lung imaging, COVID-19 nucleic acid and COVID-19 antibody examination of patients were collected. After enrollment, prospective anti-HBV treatment, HBV virology, clinical biochemistry, liver imaging and COVID-19 infection and morbidity were observed. The patients with COVID-19 infection during the prospective observation period were observed for COVID-19 infection, onset and treatment, including body temperature, clinical symptoms, signs, cardiac examination, pulmonary imaging, COVID-19, clinical biochemistry, disease severity, time of virus negative conversion, hospital stay and outcome. The influence of COVID-19 infection on liver disease and the influence of interferon anti-HBV treatment on COVID-19 infection, its pathogenesis and prognosis were studied.

The epidemiology of H. pylori infection among children in Slovenia has not been investigated. Therefore, we are conducting a study to examine the epidemiology of H. pylori and associated risk factors among children in Slovenia.

Since March 2022, there are an outbreak of SARS-CoV-2 infection (Omicron) in Shanghai. This cohort study aims to analysis the clinical outcomes of neonates born to mothers with SARS-CoV-2 infection.

A research team member will brush the inferior surface of the subjects' middle turbinate (nasal cavity) using a cytology brush to obtain the cells needed to perform our functional respiratory assays. An individual trained in phlebotomy will draw one 3 ml lavender top tube of blood to test c-reactive protein, calprotectin, and lactoferrin. They will also draw a 5 ml gold top serum separator tube of blood to test fibroblast growth factor-19. The participant will answer questions from the baseline survey and report their current medications interview-style with the research team member.

Although COVID-19 infects gastrointestinal tissues, little is known about the roles of gut commensal microbes in susceptibility to and severity of infection. The investigators will analyze the alterations in fecal microbiomes of patients with COVID-19 infection during hospitalization.

Clinically, patients with persistent HR-HPV infection for more than 18 months or HR-HPV infection with CIN2 + need regular colposcopic biopsy to assess the outcome and progression of the disease. A total of 1000 participants with persistent HR-HPV infection (100 cases/center) were recruited from multiple centers, and HPV integration status and vaginal flora diversity were sequenced at baseline, 6th month, 12th month and 24th month, respectively, through prospective cohort studies. And to evaluate the influence of HPV integration status and flora changes on the prognosis of women with persistent HR-HPV infection.

The goal of this observational study is to investigate the proportion of Mycobacterium tuberculosis (MTB) infection in school contacts of active tuberculosis (ATB) patients. The main questions it aims to answer are: the proportion of MTB infection among school contacts of ATB patients risk factors related to tuberculosis (TB) infection health economic evaluation of screening strategy

Background: - Inflammation is how the body reacts to infection or injury. Infections or inflammation in the brain and nerves can be serious. There aren t always good tests to detect this. Researchers want to learn more about how diseases affect the brain and nerves to develop better tests and treatments. Objective: - To learn more about how inflammation and infections hurt the brain and nervous system. Eligibility: - People at least 2 years old with a diagnosis or suspected diagnosis of nervous system infection or inflammation. Design: For some participants, a clinician outside of NIH will collect blood, tissue, and other samples. These will be sent to NIH and analyzed. Other participants will have several visits to NIH. Children may not have all these tests. Participants will have: Medical history. Physical and neurological exam. Blood and urine samples collected. Saliva collected. They will chew on a piece of sterile cotton for one minute. Magnetic resonance imaging (MRI) scan. The scanner is a metal cylinder in a strong magnetic field. Participants will lie on a table that slides in and out of the cylinder. Participants will get a contrast agent through an intravenous (IV) catheter during the MRI. A needle will be used to guide a thin plastic tube (catheter) into an arm vein. Lumbar puncture. Skin will be numbed and a needle will be inserted into the space between the bones in the back. Fluid will be removed. Some participants may have optional study procedures. These may include eye tests, memory and thinking testing, tests with electrodes on the head, or skin biopsy.

This study will establish a non-invasive diagnostic approach and evaluate clinical outcomes for children at high-risk for pulmonary invasive fungal infection (PIFI).

This proposed study is to test whether Health Check-up for Expectant Moms (HCEM), a computer-delivered screening and brief intervention (SBI) that simultaneously targets sexually transmitted infection (STI) risk and alcohol/drug use during pregnancy, reduces antenatal and postpartum risk more than an attention, time, and information matched control condition among pregnant women seeking prenatal care.