View clinical trials related to Communicable Diseases.
Filter by:The purpose of this observational nationwide study is to evaluate the effects of three different COVID-19 vaccines for the outcome of different severities of incident COVID infection.
Toxoplasmosis is a parasitic disease caused by Toxoplasma gondii and transmitted to humans through the consumption of raw or undercooked infected meat and / or by poorly washed vegetables. It can be transmitted from the pregnant woman to the fetus when infection occurs during pregnancy leading to congenital toxoplasmosis. Once infected, it is considered that the subject harbors cyst forms of the parasite in the muscles and brain for life with a risk of reactivation when immunocompromised. Recently, questions have been raised about the persistence of these cysts. Currently, only serological diagnosis can demonstrate the infection. This is done by detecting IgM and IgG directed against the parasite. Although humoral immunity is useful to diagnose toxoplasmosis, the cellular immunity is responsible of the main protective role during infection with the secretion of cytokines such as gamma interferon. In some situations, the serological diagnosis is limited: in immunocompromised subjects, some immunocompetent patients, in children with congenital toxoplasmosis, in which the anti T. gondii antibodies are no longer detectable. In order to have a true evaluation of the capacities of the immune system of each individual against T. gondii infection, it is necessary to evaluate the effector immune cells. The main objective of this protocol is to set up a cellular test with the stimulation of lymphocyte by T. gondii. For this objective, 20 subjects (10 positive, 10 negative for Toxoplasmosis serology) will be included. The secondary objective will be to compare the cellular diagnosis (evaluation by ELISA of the secretion of gamma interferon in the supernatant of cells stimulated by the Ag) with the serological diagnosis (IgG and IgM Alinity Abbott and Western blot LD Bio) in 3 groups of 10 patients: chronically infected patients, uninfected patients, patients with congenital toxoplasmosis as well as to assess the persistence or not of cellular and humoral immunity against T. gondii in 10 patients who had acute toxoplasmosis with a known date infection more than 10 years. Thus, 60 patients will be included for a total study period of 24 months. This study will thus allow the sponsor to have a clear understanding whether a subject is able or not to react against T. gondii infection.
Latin America is one of the worst-hit areas from the COVID-19 pandemic worldwide. Policy responses to COVID-19 in Latin America have sought to reduce viral spread, increase the capacity of the health system response, mitigate negative consequences, and strengthen governance. Few studies have examined the effectiveness of COVID-19 policies in Latin America or explored subnational variation in their effectiveness. In this observational study, the investigators will use a two-stage interrupted time series to estimate the effectiveness of nonpharmaceutical interventions in third-tier subnational units on SARS-COV2 transmission and COVID-19 mortality in Latin America. The investigators will estimate the effects in each local government, and then run a random-effects meta-analysis to obtain pooled effects for each intervention (and combinations of) and heterogeneity estimates. Finally, the investigators will explore potential explanations for the heterogeneity at the local level.
Acute gastroenterocolitis (GECA) in healthy adults is a frequent cause of looking for medical care in emergency care units and most cases are aimed at etiology viral infection or food toxin, being generally self-limited with good prognosis and only need for treatment with behavioral measures and use of medications for relief symptomatic. Anamnesis is the main resource for the diagnosis and stratification of GECA severity and is infrequent alterations of physical examination and complementary examinations without association with symptoms of alert. Telemedicine has become a resource that allows easier and faster access to medical evaluation, with low cost and rational use of resources. Virtual emergency care is part of Hospital Israelita Albert Einstein (HIAE) institutional routine and there is a large number of consultations whose final diagnosis was GECA. It is not known whether the accuracy of diagnosis of GECA by telemedicine is not inferior to the diagnosis by face-to-face evaluation, considered the Golden pattern. The aim of the study is compare the diagnostic accuracy of GECA by telemedicine with that of face-to-face care. It is a prospective randomized study with a population of adult patients who sought in person the screening of the Morumbi Emergency Care Unit of HIAE with symptoms suggestive of GECA (diarrhea with or without other symptoms of the digestive tract and infectious). Patients whose screening will be excluded of nursing directed for immediate evaluation in the emergency room and patients with dysfunctions organisms or immunosuppression. Patients who accept and sign the informed consent form will be randomized into 2 groups: A) immediate face-to-face evaluation; B) evaluation initially by telemedicine and sequentially at face-to-face evaluation. In both cases, the ICD diagnostics will be compiled and grouped according to clinical significance and will be the primary outcome of the study. Service time, exams requested, guidelines, prescription and destination will also be analyzed. Patients and doctors who undergoing group B assessment will be blinded to the telemedicine assessment data.
Significant changes in gut microbiota was noted after the high-volume bowel preparation with PEG before colonoscopy. The dynamic changes were found to be short-term. However, the perturbation pattern of gut microbiota found after bowel preparation may link to metabolic syndrome and obesity. No study had investigated the supplementation of probiotic in this dynamic situation before. Here we proposed this study to fulfill the knowledge gap and also inquiry on the potential therapeutic strategy.1.To test the hypothesis of probiotic supplementation after bowel preparation alters the composition of gut microbiota in a short-term and long-term manner.2.To test the hypothesis of GI tract associated symptoms affected by probiotic supplementation after bowel preparation. 3. To test the hypothesis of clinical events, especially parameters of metabolic syndrome affected by probiotic supplementation after bowel preparation.
Currently, a major issue within respiratory medicine is undertaking procedures that generate aerosolisation with the concern of spreading infection, such as the SARS-COV-2/COVID-19 virus. It is anecdotally reported that lung function testing and positive airways pressure devices used in clinical practice are aerosol generating procedures however the data to support this is limited. With the advent of high-speed imaging systems that can capture and quantify particle size and velocity we aim to investigate the aerosol generation in routine non-invasive positive pressure respiratory procedures.
This open, prospective, observational multicenter cohort study aims to evaluate the efficacy, safety as well as the effective serum concentration of Posaconazole for prevention of pulmonary fungal infections in patients with hematopoietic stem cell transplantation. The correlation of UGT1A4*3 genotype and Cmin of Posaconazole, as well as invasive fungal disease (IFD) breakthrough rates will be utilized to evaluate the efficacy while the safety of Posaconazole will be assessed by the overall incidence and severity of adverse events in patients.
Central nervous system (CNS) infection is a common nervous system acute and severe disease, mainly manifested as encephalitis, meningitis and meningoencephalitis, but also manifested as brain abscess and brain granuloma et al. The basis for the diagnosis of CNS infection lies in the detection of pathogens from brain parenchyma or cerebellar spinal fluid (CSF). However, CSF is relatively difficult to obtain and the sample size is small, which limits the rapid and definite diagnosis of CNS infection pathogens. In addition, CNS infection usually has non-specific clinical manifestations, so it is difficult to identify the pathogen for about half of CNS infection. Metagenomic next generation sequencing (mNGS) and biochip technology provide new means to identify the pathogens of CNS infection. This study analyzes the incidence and epidemic characteristics of CNS infection in China, to standardize the CSF sample processing process, shorten the detection time, increase the sensitivity and specificity of pathogen detection, reduce the detection cost, identify the common pathogens of CNS infection, and establish a standardized rapid diagnosis system, effective prevention and control system.
A sufficient number of subjects will be entered into testing to complete 42 subjects per each of the 2 test and 2 control configurations. A total of 84 subjects, testing bi-laterally (168 abdomen and groin sites in total completed, 42 abdomen and groin sites per each test and control material) will be evaluated using the standardized ASTM E1173 test method. Following a 14-day restriction period, subjects will be sampled for baseline, 10 minutes, 6 hours, and 24 hours post application (subjects will not be sequestered) for microbial reduction evaluations. Test day baseline criteria will be set at: abdomen: ≥ 3.0 log10 CFU/cm2, and groin: ≥ 5.0 log10 CFU/cm2.
Predictors of fungal infection in non-neutropenic patients in intensive care units and the aim of the study is To evaluate the frequency of fungal infection in non-neutropenic patients in Intensive Care Units. To evaluate the risk factors of fungal infection in these patients.