Resultados: 11

Assessing Performance of HRP2 Antigen Detection for Malaria Diagnosis in Mozambique

J. clin. microbiol; 57 (9), 2019
Rapid diagnostic tests (RDTs) that detect the Plasmodium falciparum-specific histidine-rich protein 2 (PfHRP2) antigen are the primary methods for malaria diagnosis in Mozambique. However, these tests do not detect infections with non-falciparum malaria or Pfhrp2- and Pfhrp3-deleted P. falciparum parasit...

Molecular surveillance of pfhrp2 and pfhrp3 deletions in plasmodium falciparum isolates from mozambique

Malar. j. (Online); 16 (416), 2017
Background: Malaria programmes use Plasmodium falciparum histidine-rich protein-2 (PfHRP2) based rapid diagnos tic tests (RDTs) for malaria diagnosis. The deletion of this target antigen could potentially lead to misdiagnosis, delayed treatment and continuation of active transmission. Methods: Plasmodium...

Changing Trends in P. falciparum Burden, Immunity, and Disease in Pregnancy

N. Engl. j. med; (), 2015
Background: Prevention of reinfection and resurgence is an integral component of the goal to eradicate malaria. However, the adverse effects of malaria resurgences are not known. Methods: We assessed the prevalence of Plasmodium falciparum infection among 1819 Mozambican women who delivered infants betwe...

Malaria and HIV infection in Mozambican pregnant women are associated with reduced transfer of antimalarial antibodies to their newborns

J. infect. dis; 211 (6), 2015
Background. Malaria and human immunodeficiency virus (HIV) during pregnancy affect the transplacental transfer of antibodies against several pathogens from mother to fetus, although their effect over antimalarial antibodies remains unclear. Methods. Total immunoglobulin G (IgG), IgM and IgG subtypes aga...

Impact of age of first exposure to Plasmodium falciparum on antibody responses to malaria in children: a randomized, controlled trial in Mozambique

Malar. j. (Online); 13 (121), 2014
Background: The impact of the age of first Plasmodium falciparum infection on the rate of acquisition of immunity to malaria and on the immune correlates of protection has proven difficult to elucidate. A randomized, double-blind, placebo-controlled trial using monthly chemoprophylaxis with sulphadoxine-...

IgG against Plasmodium falciparum variant surface antigens and growth inhibitory antibodies in Mozambican children receiving intermittent preventive treatment with sulfadoxine-pyrimethamine

Immunobiology (1979); 216 (7), 2011
This study aimed to evaluate whether intermittent preventive treatment in infants with sulfadoxine-pyrimethamine (IPTi-SP) had an effect on the acquisition of IgG against Plasmodium falciparum variant surface antigens (VSA) and growth-inhibitory antibodies in Manhiça, Mozambique. In addition, we assesse...

Impact of intermittent preventive treatment with sulfadoxine-pyrimethamine on antibody responses to erythrocytic-stage Plasmodium falciparum antigens in infants in Mozambique

Clin. vaccine immunol; 15 (8), 2008
We evaluated the impact of intermittent preventive treatment in infants (IPTi) with sulfadoxine-pyrimethamine (SP), which was given at ages 3, 4, and 9 months through the Expanded Program on Immunization (EPI), on the development of antibody responses to Plasmodium falciparum in Mozambique. Immunoglobuli...

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...

AAge interactions in the development of naturally acquired immunity to plasmodium falciparum and its clinical presentation

PloS med; 4 (7), 2007
Background Naturally acquired malaria immunity has many determinants and, in the absence of immunological markers of protection, studies assessing malaria incidence through clinical endpoints remain an approach to defining immunity acquisition. We investigated the role of age in disease incidence and th...

RTS, S Vaccination Is Associated With Serologic Evidence of Decreased Exposure to Plasmodium falciparum Liver- and Blood-Stage Parasites

Mol Cell Proteomics; 3 (14), 2002
The leading malaria vaccine candidate, RTS,S, targets the sporozoite and liver stages of the Plasmodium falciparum life cycle, yet it provides partial protection against disease associated with the subsequent blood stage of infection. Antibodies against the vaccine target, the circumsporozoite protein, h...