Active clinical trials for "Enterovirus Infections"

Enterovirus infections may either increase or decrease the risk of type 1 diabetes depending on the age of infection and the type of enterovirus in question. This study evaluated whether early serial exposures to three replication-competent enterovirus strains (live poliovirus vaccine, OPV) can influence the immunity to other enteroviruses and the possible initiation of autoantibodies e.g. islet autoimmunity in young genetically predisposed children.

Background: To prevent and control the epidemic of HFMD and related diseases caused by EV71 infection, the development of EV71 vaccine has been developed in many countries or regions. According to the requirements of drug registration approval, we need to evaluate immunogenicity and safety effect on combined immune effect of EV71 inactivated vaccine and other vaccines (HepB、MPSV-A、MR、JE-L). Method: Four experimental groups (HepB:3+EV71, MPSV-A:1+EV71, MR+EV71, JE-L+EV71) were included in this clinical trail. In addition to the meningococcal vaccine research group, the other three groups were followed up for the 4 times. The initial blood samples were collected, and the first dose vaccine was inoculated at the same time. EV71 second doses of vaccine were inoculated at 30 day, the blood was collected after 30 days of immunization with second doses. 6 months of safety follow-up was carried out in the whole clinical trial after vaccination. The meningococcal vaccine research group increased 1 follow-up after the second dose of MPSV-A vaccine. The index of immunogenicity and safety effect in four experimental groups need to be evaluated.

Enterovirus 71 (EV71), a major pathogen causing hand-foot-and-mouth disease (HFMD) worldwide, is a member of the Human Enterovirus species A, family Picornaviridae. Its infection occasionally leads to severe diseases and death, with central nervous system (CNS) damage. Recently, except of inactivated vaccine, several EV71 vaccine candidates have been evaluated in animals but no final results of clinical trials, such as attenuated vaccine, subunit vaccine. A formalin-inactivated EV71 vaccine (Human Diploid cell, KMB-17 Cell) has been finished phase I, II and III clinical trials and licensed by SFDA in China at Dec. 3, 2015. Based on the results of clinical trials, the protective efficacy of inactivated EV71 vaccine is 97% against HFMD caused by EV71. The phase IV clinical trial has been carried out from July 2016. The purpose of phase IV is to evaluated the safety and efficacy of the inactive EV71 vaccine in large scale population of Chinese children (from 6 to 71 months old).

This phase IV clinical study evaluates the safety of enterovirus 71 vaccine in children aged 6-35 months old by the method of both passive and active surveillance.

The study is a follow-up study on children with acute flaccid paresis associated with enterovirus D68 infection. Only children living in Europe are eligible. The study aim is to clarify the outcome of the disease and investigate possible clinical correlation with outcome, including initial severity, demographic characteristics, treatment and MRI findings.

Atherosclerosis is one of the first causes of morbidity-mortality in industrialized countries. Numerous works suggest that some infectious agents could be involved in the inflammatory process leading to the development of this pathology, such as Chlamydophila pneumoniae, cytomegalovirus or herpes simplex virus. Enteroviruses are small RNA viruses that have been incriminated in various acute or chronic cardiac diseases (pericarditis, myocarditis, dilated cardiomyopathy) and exhibit a tropism for vascular endothelia. Different clinical and experimental arguments suggest that they could play a cofactor role in the occurrence or maintenance of atherosclerosis lesions. A multicenter study developed in collaboration with colleagues of the University Hospital of Reims (France) showed that it was frequent to detect enterovirus RNA in cardiac biopsies from patients with myocardial infarction. Furthermore, a pilot study conducted in the University Hospital of Saint-Etienne (France) on atheromatous arterial samples from 18 patients allowed the detection of enterovirus RNA in 20% of them.

The purpose of this study is to evaluate the 5-year Immune Persistence of Inactivated Enterovirus Type 71 (EV71) Vaccine manufactured by Sinovac (Beijing) Biotech Co., Ltd.

To develop a real-time diagnostic technique with Virosensor for Enterovirus 71 and Influenza Virus detection, the investigators conduct a prospective clinical study. In comparison with results from direct sequencing of Enterovirus 71 and Influenza Virus, the investigators evaluate the performance of virosensor , including reproducibility, sensitivity, specificity, and cross-reaction. The potential factors which may interfere with the results would be investigated. With such technique, the investigators hope to make early diagnosis and give Enterovirus 71 and Influenza Virus patients early treatment to reduce the complications and case-fatality rate.

To develop a real-time diagnostic technique with e- Ab sensor for Entervirus 71 detection, the investigators conduct a prospective clinical study. In comparison with results from direct sequencing of Entervirus 71, the investigators evaluate the performance of e- Ab sensor, including reproducibility, sensitivity, specificity, and cross-reaction. The potential factors which may interfere with the results would be investigated. With such technique, the investigators hope to make early diagnosis and give EV71 patients early treatment to reduce the complications and case-fatality rate.

Enteroviruses can infect most human organ systems, especially the heart, nervous system and pancreas. Whether Enteroviruses can also affect the kidneys is not known yet. Therefore we will analyze urine of children with a suspected enteroviral infection for enteroviruses and signs of kidney infection.