Resultados: 10

Induction and decay of functional complement-fixing antibodies by the RTS,S malaria vaccine in children, and a negative impact of malaria exposure

BMC med; 17 (1), 2019
Background: Leading malaria vaccine, RTS,S, is based on the circumsporozoite protein (CSP) of sporozoites. RTS,S confers partial protection against malaria in children, but efficacy wanes relatively quickly after primary immunization. Vaccine efficacy has some association with anti-CSP IgG; however, it i...

Identifying Immune Correlates of Protection Against Plasmodium falciparum Through a Novel Approach to Account for Heterogeneity in Malaria Exposure

Clin. infect. dis; 66 (4), 2018
Background: A main criterion to identify malaria vaccine candidates is the proof that acquired immunity against them is associated with protection from disease. The age of the studied individuals, heterogeneous malaria exposure, and assumption of the maintenance of a baseline immune response can confound...

Duration of vaccine efficacy against malaria: 5th year of follow-up in children vaccinated with rts, s/as02 in mozambique

Vaccine; 32 (19), 2014
A primary concern for the RTS,S malaria vaccine candidate is duration of protection. The ongoing Phase III trial reported evidence of waning efficacy within the first year following vaccination. Multiple Phase IIb trials demonstrated early waning of efficacy. The longest duration of protection for RTS,S ...

Safety of the RTS, S/AS02A malaria vaccine in Mozambican children during a Phase IIb trial
Safety of the RTS,S/AS02A malaria vaccine in Mozambican children during a Phase IIb trial

Vaccine; 26 (2), 2008
RTS,S/AS02A is a pre-erythrocytic vaccine candidate based on the Plasmodium falciparum circumsporozoite surface antigen and is currently the most advanced malaria vaccine candidate in development. A proof of concept phase IIb trial of the RTS,S/AS02A in Mozambican children aged 1-4 years determined a vac...

Safety of the RTS, S/AS02D candidate malaria vaccine in infants living in a highly endemic area of Mozambique: a double blind randomised controlled phase I/IIb trial

Lancet; 370 (9598), 2007
Background: Malaria remains a leading global health problem that requires the improved use of existing interventions and the accelerated development of new control methods. We aimed to assess the safety, immunogenicity, and initial efficacy of the malaria vaccine RTS,S/AS02D in infants in Africa. Methods...

Safety and immunogenicity of the RTS, S/AS02A candidate malaria vaccine in children aged 1–4 in Mozambique

Trop. med. int. health; 29 (1), 2007
The development of a malaria vaccine remains a public health priority for sub-Saharan Africa. RTS,S/AS02A candidate malaria vaccine has been shown to be safe and immunogenic in previous studies in adults and staggered dose-escalation studies in children in The Gambia. However, genetic features and the in...

Community response to intermittent preventive treatment delivered to infants (IPTi) through the EPI system in Manhiça, Mozambique

Trop. med. int. health; 11 (11), 2006
Objective: To describe attitudes to the expanded programme on immunization (EPI) and intermittent preventive treatment in infants (IPTi), and perceptions of the relationship between them. In particular, whether the introduction of IPTi negatively affects community attitudes to, or use of, EPI; or, conver...

RTS, S/AS02A malaria vaccine does not induce parasite CSP T cell epitope selection and reduces multiplicity of infection

PLoS clin. trials; 1 (5), 2006
The candidate malaria vaccine RTS,S/AS02A is a recombinant protein containing part of the circumsporozoite protein (CSP) sequence of Plasmodium falciparum, linked to the hepatitis B surface antigen and formulated in the proprietary adjuvant system AS02A. In a recent trial conducted in children younger th...

Efficacy of the RTS, S/AS02A vaccine against Plasmodium falciparum infection and disease in young African children: randomised controlled trial

Lancet; 364 (9443), 2004
Background: Development of an effective malaria vaccine could greatly contribute to disease control. RTS,S/AS02A is a pre-erythrocytic vaccine candidate based on Plasmodium falciparum circumsporozoite surface antigen. We aimed to assess vaccine efficacy, immunogenicity, and safety in young African childr...

The Microepidemiology of malaria in Matola, a Periurban Area of Maputo, Mozambique

Using a geographic information system (GIS), the microepidemiology of malaria was studied in an area of 8 square km in Matola, a densely populated periurban are of Maputo, southern Mozambique. Integrating data on the geographic location of the main mosquito breeding sites, the location and characteristic...