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Showing 1-20 of 33 trials
NCT04214444
Pneumococcal infections remain frequent and potentially fatal. To prevent them, two anti-pneumococcal vaccines exist: a 13-valent conjugate vaccine (Prevenar®) and a 23-valent polysaccharide vaccine (Pneumovax®). For their utilization, several studies approved a prime-boost strategy. It consist two administer Pneumovax® at least two months later than Prevenar®. Patients with diffuse large B-cell Lymphoma (DLBCL) have a higher-risk to develop a pneumococcal infection. The main reason is immunosuppression, induced by rituximab (B cell depletion), chemotherapy and lymphoma. Patients are treated by immunochemotherapy, combining rituximab (anti-CD20 monoclonal antibody) and conventional chemotherapy (CHOP). However, those patients have a low rate of vaccination (about 15%).
NCT06822907
Streptococcus pneumoniae is responsible for serious infections associated to numerous hospitalizations and high rate of mortality. The incidence and therefore the burden of pneumococcal infections have been significantly reduced thanks to the use of pneumococcal conjugate vaccines (PCVs). PCVs were shown to be effective against vaccine-type serotypes causing both non-invasive and invasive pneumococcal diseases (IPD) in children and adults. PCVs use in children was shown to have an impact on IPD incidence among adults due to herd immunity and on antimicrobial resistance. To increase the protection of at-risk patients against IPD, the 20-valent PCV (PCV-20) is recently recommended in adults, after a period where PCV-13 followed by pneumococcal polysaccharide vaccine 23 valent (PPV-23) was recommended. PCV-20 effectiveness against IPD and against pneumonia was inferred from immunobridging with PCV-13. Indeed PCV-13 was shown effective to reduce the incidence of low respiratory tract infections and IPD (bacteraemia and meningitis) in 65-years-old-adults and older. Currently immunization against S. pneumoniae is recommended with PCV-20 for adult patients at-risk for IPD such as immunocompromised (=high-risk patients) and in immunocompetent people with underlying chronic conditions (cardiovascular, liver, pulmonary, kidney diseases and diabetes mellitus) (=medium risk patients). However, vaccine coverage against IPD in adults remains low globally, and does not exceed 5 % in France. Reducing missed opportunities of vaccination for S. pneumoniae is crucial.
NCT06998251
The NoseSpn-Elderly study aims at characterizing the immune response in the upper respiratory tract in adults aged 60 and over diagnosed with a pneumonia due to a Streptococcus pneumoniae (Spn) infection. The immune response during the acute phase of the infection and after recovery will be compared to the immune response of asymptomatic Spn carriers as well as to the immune response of patients diagnosed with a viral respiratory infection (flu or respiratory syncytial virus (RSV)). The primary objective of this observational study is to quantify the inflammatory response in the nasal cavity and to correlate it with bacterial/viral load and with clinical parameters. The study also aims to compare the inflammatory response measured in the nose to that measured in the blood. Participants will have two study visits including a blood draw, several nasal samplings (nasal lining fluid and nasal cells) and a saliva sampling, one within 72 hours of their hospital admission and another one month later. Nasal lining fluid and saliva will be obtained every two or three days until discharge from the hospital or resolution of symptoms. During those visits, questions regarding symptoms will be asked.
NCT05982314
A 6 and 12 month safety and immunogenicity study of participants in study GPNV-001, a novel whole-cell pneumococcal vaccine.
NCT05920499
The goal of this cluster-randomized trial is to study the effect of Audit and Feedback loops on pneumococcal vaccination coverage rate in adults at risk in general practice. The main questions it aims to answer are: * To assess the effect of "clinical AUDIT and feedback" loops on the pneumococcal vaccination coverage rate in adults at risk in general practice. * To explore whether the increase in vaccination coverage rate after implementation of Audit and Feedback loops is different in specific subgroups (risk groups, male/female, age, smoking status). Every general practice center assigned to the control or intervention group will have access to a clinical AUDIT to identify patients that may benefit from a pneumococcal vaccination. The general practice centers in the intervention group will also receive an individualized extended electronic feedback report, with multiple components like benchmarked performances and action plans, at baseline and each 2 months from baseline onwards.
NCT03276754
Prospective multicenter observational study, to evaluate the impact of routine clinical practice vaccination with PCV13 on the reduction of the risk of moderate/severe COPD exacerbations
NCT04841369
Streptococcus pneumoniae is a major cause of morbidity and mortality in children worldwide, resulting in up to 1 million pediatric deaths every year.Since the licensure of PCV7 and PCV13,the reported overall decline in invasive pneumococcal disease in hospitalized children younger than 5 years several years is approximately 60% in Western countries.This is a single center,blind, randomized, positive-controlled clinical trial.The purpose of this study is to preliminary evaluate the safety of PCV13i vaccine in subjects at age of 7 months and above,and to investigate the safety and immunogenicity of PCV13i vaccine at age of 2 and 3 months,compared to PCV13.
NCT03893448
The purpose of this study is to evaluate the safety, tolerability, and immunogenicity of V114 in healthy infants. The primary hypotheses are that: 1) V114 is non-inferior to Prevnar 13™ for the 13 shared serotypes between V114 and Prevnar 13™ based on response rates at 30 days following Dose 3; 2) V114 is non-inferior to Prevnar 13™ for the 2 unique V114 serotypes based on the response rate of the 2 unique V114 serotypes compared with the lowest response rate of any of the shared serotypes in Prevnar 13™, excluding serotype 3, at 30 days following Dose 3; 3) V114 is non-inferior to Prevnar 13™ for the 13 shared serotypes based on anti-pneumococcal polysaccharide (PnPs) serotype-specific immunoglobulin g (IgG) geometric mean concentrations (GMCs) at 30 days following Dose 3; 4) V114 is non-inferior to Prevnar 13™ for the 2 unique V114 serotypes based on the anti-PnPs serotype-specific IgG GMCs of the 2 unique V114 serotypes compared with the lowest IgG GMC of any of the shared serotypes in Prevnar 13™, excluding serotype 3, at 30 days following Dose 3; 5) V114 is non-inferior to Prevnar 13™ for the 13 shared serotypes between V114 and Prevnar 13™ based on anti-PnPs serotype-specific IgG GMCs at 30 days following Dose 4; and 6) V114 is non-inferior to Prevnar 13™ for the 2 unique V114 serotypes based on anti-PnPs serotype-specific IgG GMCs of the 2 unique V114 serotypes compared with the lowest IgG GMC of any of the shared serotypes in Prevnar 13, excluding serotype 3, at 30 days following Dose 4.
NCT02274415
Streptococcus pneumoniae is the major cause of bacterial infection in patients with sickle cells disease. The 23-valent pneumococcal polysaccharide vaccine (PSV) is supposed to be poorly immunogenic in these patients. We want to evaluate whether a prime with a 13-valent pneumococcal conjugate vaccine (PCV), able to induce immunologic memory, would improve the immune response against SP polysaccharides (SPP). Primary objective: To evaluate and compare the specific antibody response to a prime-boost vaccine strategy combining PCV prime at W0 followed by the administration of PSV boost at W4, to the administration of PSV alone at W4 in patients with sickle cells disease. Secondary objectives: Evaluation and comparison of the specific antibody response to the thirteen pneumococcal serotypes shared by the PCV and PSV vaccines, 4 weeks after the single PSV vaccination for patients from Group 1 or 4 weeks after the boost PSV vaccination for patients from group 2. Evaluation of the duration of the specific antibody response at W24 and 96. Evaluation of the T CD4 lymphocyte response to the CRM 197 protein. Safety of the vaccines. Study Design: Randomised, monocentric, controlled phase II study of the immunological efficacy of a prime boost strategy combining the sequential administration of the PCV and PSV, compared to the administration of the PSV alone. 180 adults patients with sickle cells disease will be included. The primary endpoint : proportion of responders at W8 to at least 10 of thirteen serotypes. Secondary endpoints : Proportion of responders at W8 according to 4 categories of responders: 5-7; 3-4; 2-1 and 0. Evaluation of the pneumococcal opsonophagocytic activity (OPA) at baseline and W8 for each serotype, defined as the proportion of patients with OPA \> 1:8 geometric mean of the specific antibody titers proportion of patients who experienced an increase of specific antibody levels 1 g/ml. Evaluation of the priming effect of the PCV vaccine in the group 1. Duration of the specific antibody responses at week 24 and W96. CD4 T lymphocyte responses to the CRM 197 protein (proliferative and cytokine production) at weeks 0, 8 and 12. Safety of the vaccines frequency of Streptococcus pneumoniae infections. Statistical Considerations: With a sample size of 180 patients, and a randomization ration of 1:1, the study will have a power of at least 90% to show a difference of 25% category between the group receiving PCV and PSV vs the group receiving PSV alone (two-sided type I error = 5%). The primary comparison between both groups will be performed using a Chi2 test for independent groups or a Fisher exact test where appropriate.
NCT04989465
This an open phase Ⅳ clinical trial of 23-valent pneumococcal polysaccharide vaccine manufactured by Sinovac Biotech Co., Ltd.The purpose of this study is to evaluate the immunity persistence after single dose of 23-valent pneumococcal polysaccharide vaccine.
NCT03550313
This is a Phase 2, randomized, active-controlled, open-label study with a 3-arm parallel design. Healthy 2-month old infants (42 to 98 days of age) with no history of pneumococcal vaccination will be randomized in a 1:1:1 ratio to receive a 4-dose series of: multivalent pneumococcal conjugate vaccine coadministered with Prevnar 13 (Group 1); multivalent pneumococcal conjugate vaccine given 1 month after Prevnar 13 (Group 2); or Prevnar 13 with a single dose of multivalent pneumococcal conjugate vaccine (Group 3).
NCT03480763
This study is designed 1) to evaluate the safety, tolerability, and immunogenicity of V114 and Prevnar 13™, 2) to describe the safety of sequential administration of V114 or Prevnar 13™ followed by PNEUMOVAX™23, and 3) to evaluate the immune responses to the 15 serotypes contained in V114 when PNEUMOVAX™23 is given approximately 12 months after receipt of either V114 or Prevnar 13™ in healthy adults 50 years of age or older. There was no formal hypothesis testing.
NCT00000829
To assess whether HIV-infected infants who receive a heptavalent pneumococcal conjugate vaccine have more local reactions at the site of injection and systemic reactions than placebo subjects. To assess whether this vaccine is more immunogenic than placebo following the third vaccination. Children with HIV infection are at increased risk for invasive pneumococcal infection, particularly bacteremia. A large proportion of pneumococcal disease is caused by a limited number of serotypes. The maximum number of pneumococcal serotypes that can be included in a new conjugate vaccine is felt to be limited by the amount of carrier protein. A heptavalent pneumococcal conjugate vaccine has been developed that consists of pneumococcal capsular saccharides from serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F bound to a diphtheria toxin mutant carrier protein.
NCT03731182
This study is designed to describe the safety, tolerability, and immunogenicity of V114 in children with sickle cell disease.
NCT02012309
Human Immunodeficiency Virus (HIV) infection is complicated by high rates of infections and cancers which are often the cause of death rather than the HIV/acquired immune deficiency syndrome (AIDS) virus itself. Treatment of HIV with antiretroviral medications has decreased the frequency of many complications by over 90%, but bacterial pneumonia remains extremely high. Current vaccines are not very effective in preventing these infections in patients with HIV infection. The investigators are studying the cells (B cells) that make antibodies to fight infection by binding to and killing bacteria. The goal is to understand how HIV impairs the ability of B cells to make antibodies in sufficient quantity and of sufficient quality to protect patients with HIV to learn how to enhance protection against these infections. The investigators also seek to understand the role of the bacteria (specifically Streptococcus pneumoniae) that normally live in the nose and throat in the development of pneumonia and other infections.
NCT03313050
This is a 2-stage, phase 1/2, randomized, active-controlled, observer-blinded study with a 2-arm parallel design in each stage. In Stage 1 healthy adults 50 to 64 years of age with no history of pneumococcal vaccination will be randomized equally to receive either a single intramuscular dose of multivalent pneumococcal conjugate vaccine or a licensed tetanus, diphtheria, acellular pertussis combination vaccine (Tdap) (control group). In Stage 2 healthy adults 65 to 85 years of age previously vaccinated with Prevnar 13 \>=2 months prior to investigational product administration will be randomized equally to receive either a single intramuscular dose of multivalent pneumococcal conjugate vaccine or the licensed 23-valent pneumococcal polysaccharide vaccine (control group).
NCT02583373
The objectives of this study are to assess the safety, tolerability, clinical and microbiological efficacy and pharmacodynamics of patients who have severe pneumonia caused by Streptococcus pneumoniae after the intravenous administration of CAL02 in addition of standard of care antibiotic treatment.
NCT01899365
Background : Community-acquired pneumonia (CAP) is a threat in industrialized countries. It represents the 6th cause of death. CAP also frequently associates with other disorders responsible for admission and death. Among bacteria responsible for CAP, Streptococcus pneumonia is a major pathogen that is commonly involved and frequently leads to severe infection and admission. Categories at risk for this pathogen have been determined, and can be proposed anti-pneumococcal vaccination (APV) that efficiently and safely protects from this microorganism. In the context of US health services, monocenter pilot experiences have reported improvement of pneumococcal prophylaxis implementing vaccination procedure at ED. A study that set in New Mexico (2003) reported a significant increase in APV (from 18% to 84%) when patients at risk were proposed vaccination at ED. To obtain these results, medical students were specifically trained and dedicated to screen and vaccinate against St. pneumoniae. Another single center trial (Tennessee, 2007) for APV at ED obtained an improvement (from 38.8 to 45.4%) when physicians were alerted for pneumococcal risk by the software they usually utilized at bedside. However these experiences remain sparse as additional dedicated resources are required or patients and attending ED physicians can be reluctant to proceed to vaccination at ED. Mobile phone and derived communication modalities are current vectors to deliver information in several fields including education and medicine. Initially used in developing countries, short-message services (SMS) have improved behaviour of patients in various medical areas. In France, the investigators have observed that most patients above 50 years of age admitted after ED visit are equipped with mobile phone and can receive alerts by SMS. These observations prompt us to propose a multifaceted procedure to improve APV after ED visit in at-risk patients, combining structured oral interview, written information and SMS as reminders. Purpose : The investigators hypothesized that * a multifaceted intervention to promote anti-pneumococcal vaccination combining a structured oral interview, a written information to patient and his/her general practitioner, and a series of 3 SMS, * improves anti-pneumococcal vaccination at 6 months, * in at-risk patients (65+ years) visiting the emergency department. In order to answer this question, the investigators designed an interventional prospective multicenter randomized study (cluster).
NCT02987972
This study is designed to evaluate the safety, tolerability, and immunogenicity of two different lots of V114 in healthy infants 6 to 12 weeks (\>=42 days to \<=90 days) of age. The primary hypothesis of the study is that the proportion of participants receiving V114 who have serotype specific IgG \>=0.35 mcg/mL for each of pneumococcal serotypes 1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F at 1 month after Dose 3 is non-inferior to that for recipients of Prevnar 13™.
NCT03642847
This Phase 1b will describe the safety and immunogenicity of 2 multivalent pneumococcal conjugate vaccine formulations in healthy Japanese adults in the United States.