View clinical trials related to Infections.
Filter by:This phase I trial tests the feasibility and safety of genetically modified cytotoxic T-lymphocytes in controlling infections caused by adenovirus (ADV), BK virus (BKV), cytomegalovirus (CMV), JC virus (JCV), or COVID-19 in immunocompromised patients with cancer. Viral infections are a leading cause of morbidity and mortality after hematopoietic stem cell transplantation, and therapeutic options for these infections are often complicated by associated toxicities. Genetically modified cytotoxic T-lymphocytes (CTLs) are designed to kill a specific virus that can cause infections. Depending on which virus a patient is infected with (ADV, BKV, CMV, JCV, or COVID-19), the CTLs will be designed to specifically attack that virus. Giving genetically modified CTLs may help to control the infection.
Helicobacter pylori is a pathogenic bacteria transmitted from individual to individual, being scientifically recognized as an agent who causes persistent inflammatory activity on the gastric mucosa. This pathogen represents a Global Health problem, as shown in a systematic review by Hooi et al. Besides regional differences, more that half of the world population is expected to have already been infected by this bacteria. In Portugal, research studies estimate that more than 80% of the adult population has already contacted with H. pylori. H. pylori infection is associated with active chronic gastritis in every colonized patient, what may consequently lead to peptic ulcer disease, atrophic gastritis, gastric adenocarcinoma and mucosa-associated lymphoid tissue (MALT) lymphoma. For that reason, H. pylori infection is considered to be a disease, independently of the presence of gastrointestinal symptoms. Additionally, H. pylori has been classified as a confirmed carcinogen (class I) by the International Agency for Research, being responsible for carcinogenic pathways conducting to both gastric adenocarcinoma and lymphoma. This fact gains a particular relevance taking into account that gastric cancer is one of the most prevalent cancers worldwide. On other hand, more than 75% of the gastric cancers occur following H. pylori infection. Thus, H. pylori eradication constitutes an essential Public Health measurement, being inclusively considered a cost-effective method to decrease the gastric cancer burden, by promoting pre-malignant lesions regression, such as atrophic gastritis, and by delaying the disease progression in case of intestinal metaplasia or dysplasia. Maastricht V consensus is a document updated in 2016, including the major recommendations regarding H. pylori diagnosis, follow-up and treatment. It highlights the emergence of antibiotic resistances and how they must influence clinical practice, namely the choice of antibiotic regimens, as successful eradication has become less frequent with more prevalent antibiotic resistances. This is the case of clarithromycin and metronidazol, both currently recommended as first-line options by the Portuguese Society of Gastroenterology. In fact, a systematic review conducted in 2018, aiming to evaluate antibiotic resistances on the Portuguese population observed that clarithromycin, metronidazole and double resistance occurred in 42%, 25% and 20% of the individuals, respectively. Nowadays, Maastricht V guidelines recommend quadruple regimens containing bismuth, such as Pylera (r), as the first-line option in areas with significant double resistance to metronidazole and clarithromycin. Another option currently being investigated is the double therapy with amoxicillin in high doses and proton pump inhibitor. This has become a particularly attractive alternative due to its efficacy, good tolerability and significantly low resistance (<1%) among the European population. The aim of this clinical trial is to compare both regimens - pylera (r) and high-dose amoxycillin - in H. pylori eradication, regarding their efficacy, tolerability and side effects, in order to asses viable therapeutic options in a population with progressively increasing resistances to alternative regimens currently recommended.
The protocol, in accordance with the objectives of ORCHESTRA project - Work Package 2, aims at investigating the characteristics and determinants of COVID-19 long-term sequelae. This goal will be reached through the harmonization of follow-up strategies across the participating cohorts to allow a standardized collection of data on COVID-19 long-term sequelae. The result will be a platform including a set of data and biomaterials from large scale international cohorts, that will be uniformly recorded, prospectively tracked and analysed. The ultimate goal will be that of providing evidence to contribute to the optimization and improvement of the management and prevention of COVID-19 sequelae. The follow-up will be organized in multiple levels of tests, according to the capability of each cohort, and will include questionnaires to collect demographic, epidemiological and clinical data, physical examination, radiological exams and biological sampling. The long-term follow-up will also allow the assessment of long-term immunological response to SARS-CoV-2 infection and its association to the vaccination and to different treatment strategies, including monoclonal antibodies.
The investigators aim to assess the effectiveness and safety of sofosbuvir/velpatasvir/voxilaprevir (SOF/VEL/VOX) for 12 weeks in hepatitis C virus (HCV)-infected patients who fail to prior NS5A-containing DAA regimens and HCV genotype 1a and 3 patients who fail to prior non-NS5A-containing DAA regimen in Taiwan on a basis of a multicenter observational study.
The purpose of the study is to evaluate the reliability and accuracy of a newly developed point-of-care analyzer, theCytoTracker, to measure complete blood count (CBC) parameters and discriminate between viral and bacterial infections.
This is a single centre, single arm, open-label, phase I study to evaluate the safety and effectiveness of CMV-TCR-T cell immunotherapy in treating refractory CMV infection after HSCT.
Malaria is a parasitic disease causing substantial morbidity and mortality globally. Malaria is a potentially severe and fatal disease in non-immune individuals. In areas of intense transmission infections individuals acquired immunity that protect against clinical disease. Nonetheless, immunity is not regarding sterilizing and repeated infections often result in an asymptomatic carriage of malaria parasites. These chronic apparently asymptomatic infections have been associated with anemia, cognitive dysfunction and adverse events during pregnancy. Global migration has increased over the last decade and has resulted in an increasing number of migrants from malaria endemic regions arriving in non-endemic countries. Migrants from malaria endemic countries may carry asymptomatic infections with malaria parasites, as well as other parasitic infections such as strongyloides and schistosomiasis, with a possible negative impact on health in this group. The prevalence of asymptomatic malaria and other parasites is not fully elucidated in migrants from different regions. Moreover, the longevity of asymptomatic carriage of malaria parasites in absence of re-exposure is not known. The aim of this study is to assess the prevalence of malaria parasites and other parasitic infections in migrants in Sweden, both newly arrived and migrants with longer residency, and intend to evaluate the need for screening for various parasitic infections in migrants arriving in Sweden. Moreover, this study will also assess antibody responses to malaria and other parasitic diseases.
Capnodynamic monitoring has the potential to offer continuous and non-invasive measurements of heart and lung function in patients requiring ventilation in an intensive care setting. Since mechanical ventilation with full patient synchronization is commonly used in ICU, capnodynamic monitoring can be immediately embedded in clinical care and compared to current methods of monitoring cardiac output, lung volumes and oxygen delivery. This observational study will explore capnodynamic monitoring in mechanically ventilated patients with a range of cardiorespiratory compromise.
Solid organ transplant candidates will undergo serological screening for HHV8 at time of listing and transplantation. In the event of a recipient/donor mismatch R-/D+ or in the presence of a seropositive recipient (R+), blood levels of HHV8 DNA will be monitored together with specific IGRA for HHV8.
Background: Vaccines against SARS-CoV-2, the virus that causes COVID-19, have been highly effective against preventing severe disease. But the protective effects of these vaccines appear to wane over time. Researchers want to learn why. Objective: To learn more about how the immune system responds to vaccines against infections like SARS-CoV-2. Eligibility: Healthy adults ages 18 or older who are scheduled to receive either a new vaccine or a booster shot against SARS-COV-2 or another emerging infection. Design: Participants will be screened with a medical history and blood and urine tests. Participants will have up to 8 study visits in 1 year. Each visit should last less than 2 hours. At each visit, participants will give blood samples. Some blood samples will be used for genetic testing. They will also give updates on their health. After the first study visit, participants will receive either a first vaccination or a booster shot. They must get the vaccine in their community or workplace. They will not get the vaccine at NIH. This study currently focuses on SARS-CoV-2, but it will expand to other infectious diseases as they emerge and become the target of new vaccines. ...