Resultados: 75

Dynamics of afebrile plasmodium falciparum Infections in mozambican men

Clin. infect. dis; 67 (7), 2018
Background. Afebrile Plasmodium falciparum infections usually remain undetected and untreated in the community and could potentially contribute to sustaining local malaria transmission in areas aiming for malaria elimination. Methods. Thirty-two men with afebrile P. falciparum infections detected with ra...

IgM and IgG against Plasmodium falciparum lysate as surrogates of malaria exposure and protection during pregnancy

Malar. j. (Online); 17 (1), 2018
Background: Difficulties to disentangle the protective versus exposure role of anti-malarial antibodies hamper the identification of clinically-relevant immune targets. Here, factors affecting maternal IgG and IgMs against Plasmodium falciparum antigens, as well as their relationship with parasite infect...

High production of pro-inflammatory cytokines by maternal blood mononuclear cells is associated with reduced maternal malaria but increased cord blood infection

Malar. j. (Online); 17 (1), 2018
Background: Increased susceptibility to malaria during pregnancy is not completely understood. Cellular immune responses mediate both pathology and immunity but the effector responses involved in these processes have not been fully characterized. Maternal and fetal cytokine and chemokine responses to mal...

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...

Drug-resistant polymorphisms and copy numbers in plasmodium falciparum, mozambique, 2015

One of the fundamental steps toward malaria control is the use of antimalarial drugs. The success of antimalarial treatment can be affected by the presence of drug-resistant populations of Plasmodium falciparum. To assess resistance, we used molecular methods to examine 351 P. falciparum isolates collect...

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...

Multiplexing detection of IgG against Plasmodium falciparum pregnancy-specific antigens

PLos ONE; 12 (7), 2017
Background: Pregnant women exposed to Plasmodium falciparum generate antibodies against VAR2CSA, the parasite protein that mediates adhesion of infected erythrocytes to the placenta. There is a need of high-throughput tools to determine the fine specificity of these antibodies that can be used to identif...

Resisting and tolerating P. falciparum in pregnancy under different malaria transmission intensities

BMC med; 15 (1), 2017
Resistance and tolerance to Plasmodium falciparum can determine the progression of malaria disease. However, quantitative evidence of tolerance is still limited. We investigated variations in the adverse impact of P. falciparum infections among African pregnant women under different intensities of malari...

Efficacy and safety of artemether-lumefantrine for the treatment of uncomplicated falciparum malaria at sentinel sites in Mozambique, 2015

Acta trop.; 171 (1), 2017
he resistance of Plasmodium falciparum to anti-malarial drugs continues to challenge malaria control. We assessed the therapeutic efficacy and safety of artemether-lumefantrine (AL), the first-line treatment of uncomplicated P. falciparum malaria, in children under five years of age in Mozambique. We con...

In-vivo efficacy of chloroquine to clear asymptomatic infections in mozambican adults: a randomized, placebo-controlled Trial with Implications for Elimination Strategies

Recent reports regarding the re-emergence of parasite sensitivity to chloroquine call for a new consideration of this drug as an interesting complementary tool in malaria elimination efforts, given its good safety profile and long half-life. A randomized (2:1), single-blind, placebo-controlled trial was ...