View clinical trials related to Pneumococcal Infection.
Filter by:Splenectomized thalassemia major subjects were provided with PCV pneumococcal vaccine (Prevenar 13®) at the start of the trial, following which they were randomly assigned to 2 groups (zinc and placebo group). After 8 weeks, the subjects received PPV pneumococcal vaccine (Pneumovax®). Zinc syrup was provided to the zinc group at a dose of 1.5 mg/kg/day (maximum of 50 mg/day). Pneumococcal IgG examinations were conducted at the start of the trial and after 12 weeks.
Streptococcus pneumoniae is a type of bacteria that can cause infections of the ears, sinuses or lungs. It can also cause more serious infections of the blood or brain. The elderly and young children are more vulnerable to these types of infections. The vaccines available at present are effective only on a certain number of strains of the bacteria. The PnuBioVax vaccine is being developed to work on a broader range of strains. This study will be looking at the safety and tolerability of the study drug for three different dosages: 50 μg, 200 μg, and 500 μg compared to placebo. The population eligible to take part in the study are healthy male and female subjects between 18 and 40 years of age. Volunteers for the study will be recruited through advertisements. Each volunteer will have received an information sheet concerning the study and will have agreed to participate in writing. Volunteers will be given at least 48 hours between reading the information leaflet and agreeing to participate. Only subjects who agree to undertake precautions to avoid pregnancy of either themselves of their partner during the study period will be eligible. Volunteers will give signed consent for their physician to be notified about their participation in the trial.
The investigators hypothesized that vaccination with either the 23-valent pneumococcal polysaccharide vaccine (PPV23) alone or the 13-valent pneumococcal conjugate vaccine (PCV 13) followed by PPV23 results in similar antibody levels/functional activity and induce a similar pneumococcal polysaccharide (PPS)-specific B cell response in HIV-positive individuals >50 years of age and HIV-negative persons>50 years of age. The investigators immunized the study group HIV+ persons>50 and controls (HIV negative >50 years) with PCV13 followed by PPV23 and HIV+>50 with PPV23 alone. The investigators examined immune responses to PPS23F and PPS14 on a quantitative and qualitative level using ELISA and opsonophagocytic assays (OPA). To test the hypothesis that the levels of antigen specific B cells identified with PPS were comparable between the PPV23 and PCV13 vaccine recipients. Pre- and post-immunization peripheral blood samples were obtained. Extensive B cell phenotype analysis using fluorescent antibodies was used to characterize PPS-labeled B cells. Specific phenotypes were correlated with antibody levels and OPA and compared to historic populations immunized with PPV.
The purpose of the study. To characterize the immune response to the pneumococcal vaccine in HIV positive individuals and to dissect the most appropriate timing and frequency of vaccination.
Exploratory study of anti-pneumococcal immune response in patients with Anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) immunized according to new vaccine recommendations (i.e. with a combined vaccine schedule (13-valent conjugate pneumococcal vaccine -PCV13- followed by a 23-valent non-conjugate pneumococcal vaccine -PPV23- 8 weeks later).
Descriptive study of the residual anti-pneumococcal immunity in patients with Anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) who have previously gone through pneumococcal immunization.
Immune response analysis after the combination of PCV13 and PPV23 will lead to evaluate if a prime with PCV13 help to obtain a good response to repeated dose of PPV23.The hyporesponsiveness following the unconjugated vaccine is associated with high polysaccharide antigen concentration. Several issues limit the development and recommendation of anti-pneumococcal vaccine in adult's patients at risk. Reduced doses of unconjugated polysaccharide antigens would bypass the hyporesponsiveness and maintain the expanded coverage serotype. A better knowledge of immune response following the combination of two vaccines in adults is essential. In addition, adults are required to be exposed to repeated doses of polysaccharide antigens by vaccine or by natural exposure, it is important to determine the extend and duration of any hyporesponsiveness. The main objective is to evaluate if non conjugate polysaccharidique fractionated doses administered after a conjugate vaccine help to avoid hyporesponse in a schedule with repeated injections of pneumococcal polysaccharidique vaccine
The purpose of this study is to determine if revaccination with pneumococcal vaccine (PNEUMOVAX™ 23, V110) is well tolerated and produces an immune response in older Japanese adults. The primary hypothesis being tested is that the geometric mean concentration of antibodies to pneumococcal polysaccharide serotypes 3, 6B, and 23F at 4 weeks after revaccination will be superior to that before revaccination in Japanese adults who received a primary vaccination at least 5 years before revaccination.
The 23-valent pneumococcal Polysaccharide vaccine (23vPPV) has been developed for children and adults to prevent pneumococcal diseases such as pneumonia (inflammation of the lungs), meningitis (inflammation of the brain lining), and septicemia (blood poisoning) since 2006 in China. Also, the trivalent influenza vaccine (TIV) is frequently administered to the children and adults. The main objective of this study is to show that both vaccines can safely be administered together without affecting the immune response of protecting against disease.
Colistin is amphipathic, cannot be absorbed from the gastrointestinal tract and is administered intramuscularly, intravenously (IV) or via inhalation. In the case of pneumonia, aerosolized route of administration is favorable as it presumably delivers a high concentration of drug directly to the infection site. Colistimethate sodium is an FDA approved drug, however, its aerosolized use represents a new method of administration not currently FDA-approved in the United States. In this proposal, the inactive prodrug colistimethate sodium has been selected to use for aerosolization as it is better tolerated than colistin sulphate. It is a randomized, open-labeled Phase 1 trial of aerosolized and/or IV formulations of colistin as multiple doses over seven days. The primary objective of this trial is to evaluate the safety and tolerability of multiple doses of aerosolized and intravenous colistimethate sodium separately or in combination in healthy adult subjects.