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falciparum

Method for Malaria Diagnosis Based on Extractions of Samples Using Non-Invasive Techniques: An Opportunity for the Nursing Clinical Practice

August 5, 2020 - 16:17 -- Open Access
Author(s): 
Gómez-Luque A, Parejo JC, Clavijo-Chamorro MZ, López-Espuela F, Munyaruguru F, Belinchón Lorenzo S, Monroy I, Gómez-Nieto LC
Reference: 
Int J Environ Res Public Health. 2020 Jul 31;17(15):E5551

Malaria has been for millennia one of the best known and most destructive diseases affecting humans. Its high impact has aroused great interest for the development of new effective and reliable diagnostic techniques. Recently it has been recently published that hairs from mammal hosts are able to capture, hold and finally remove foreign DNA sequences of Leishmania parasites.

Organoarsenic Compounds with In Vitro Activity against the Malaria Parasite Plasmodium falciparum

August 5, 2020 - 16:11 -- Open Access
Author(s): 
Basova S, Wilke N, Koch JC, Prokop A, Berkessel A, Pradel G, Ngwa CJ
Reference: 
Biomedicines. 2020 Aug 2;8(8):E260

The rapid development of parasite drug resistance as well as the lack of medications targeting both the asexual and the sexual blood stages of the malaria parasite necessitate the search for novel antimalarial compounds. Eleven organoarsenic compounds were synthesized and tested for their effect on the asexual blood stages and sexual transmission stages of the malaria parasite Plasmodium falciparum using in vitro assays.

Spatial and Temporal Patterns of Malaria in Phu Yen Province, Vietnam, from 2005 to 2016

August 5, 2020 - 16:09 -- Open Access
Author(s): 
Wangdi K, Canavati S, Duc TN, Nguyen TM, Tran LK, Kelly GC, Martin NJ, Clements ACA
Reference: 
J Trop Med Hyg. 2020 Aug 3

Malaria in Vietnam has become focal to a few provinces, including Phu Yen. This study aimed to assess correlations between intervention (population proportion protected by insecticide-treated nets and indoor residual spraying) and climatic variables with malaria incidence in Phu Yen Province. The Vietnam National Institute of Malariology, Parasitology, and Entomology provided incidence data for Plasmodium falciparum and Plasmodium vivax for 104 communes of Phu Yen Province from January 2005 to December 2016.

Emergence and clonal expansion of in vitro artemisinin-resistant Plasmodium falciparum kelch13 R561H mutant parasites in Rwanda

August 5, 2020 - 15:14 -- Open Access
Author(s): 
Uwimana A, Legrand E, Stokes BH, Ndikumana JM, Warsame M, Umulisa N, Ngamije D, Munyaneza T, Mazarati JB, Munguti K, Campagne P, Criscuolo A, Ariey F, Murindahabi M, Ringwald P, Fidock DA, Mbituyumuremyi A, Menard D
Reference: 
Nat Med. 2020 Aug 3. doi: 10.1038/s41591-020-1005-2

Artemisinin resistance (delayed P. falciparum clearance following artemisinin-based combination therapy), is widespread across Southeast Asia but to date has not been reported in Africa. Here we genotyped the P. falciparum K13 (Pfkelch13) propeller domain, mutations in which can mediate artemisinin resistance, in pretreatment samples collected from recent dihydroarteminisin-piperaquine and artemether-lumefantrine efficacy trials in Rwanda.

Evaluation of highly sensitive diagnostic tools for the detection of P. falciparum in pregnant women attending antenatal care visits in Colombia

August 4, 2020 - 15:37 -- Open Access
Author(s): 
Vásquez AM, Vélez G, Medina A, Serra-Casas E, Campillo A, Gonzalez IJ, Murphy SC, Seilie AM, Ding XC, Tobón Castaño A
Reference: 
BMC Pregnancy Childbirth. 2020 Jul 31;20(1):440

In low transmission settings early diagnosis is the main strategy to reduce adverse outcomes of malaria in pregnancy; however, microscopy and rapid diagnostic tests (RDTs) are inadequate for detecting low-density infections. We studied the performance of the highly sensitive-RDT (hsRDT) and the loop mediated isothermal DNA amplification (LAMP) for the detection of P. falciparum in pregnant women.

Association between the proportion of Plasmodium falciparum and Plasmodium vivax infections detected by passive surveillance and the magnitude of the asymptomatic reservoir in the community: a pooled analysis of paired health facility and community data

August 3, 2020 - 15:54 -- Open Access
Author(s): 
Stresman G, Sepúlveda N, Fornace K, et al.
Reference: 
Lancet Infect Dis. 2020 Aug;20(8):953-963

Passively collected malaria case data are the foundation for public health decision making. However, because of population-level immunity, infections might not always be sufficiently symptomatic to prompt individuals to seek care. Understanding the proportion of all Plasmodium spp infections expected to be detected by the health system becomes particularly paramount in elimination settings. The aim of this study was to determine the association between the proportion of infections detected and transmission intensity for Plasmodium falciparum and Plasmodium vivax in several global endemic settings.

Use of a highly specific kinase inhibitor for rapid, simple and precise synchronization of Plasmodium falciparum and Plasmodium knowlesi asexual blood-stage parasites

July 20, 2020 - 15:15 -- Open Access
Author(s): 
Ressurreição M, Thomas JA, Nofal SD, Flueck C, Moon RW, Baker DA, van Ooij C.
Reference: 
PLoS ONE 15(7): e0235798

During the course of the asexual erythrocytic stage of development, Plasmodium spp. parasites undergo a series of morphological changes and induce alterations in the host cell. At the end of this stage, the parasites egress from the infected cell, after which the progeny invade a new host cell. These processes are rapid and occur in a time-dependent manner.

Hotspots in Plasmodium and RBC Receptor-Ligand Interactions: Key Pieces for Inhibiting Malarial Parasite Invasion

July 7, 2020 - 13:48 -- Open Access
Author(s): 
Patarroyo MA, Molina-Franky J, Gómez M, Arévalo-Pinzón G, Patarroyo ME
Reference: 
Int J Mol Sci. 2020 Jul 2;21(13):E4729

Protein-protein interactions (IPP) play an essential role in practically all biological processes, including those related to microorganism invasion of their host cells. It has been found that a broad repertoire of receptor-ligand interactions takes place in the binding interphase with host cells in malaria, these being vital interactions for successful parasite invasion. Several trials have been conducted for elucidating the molecular interface of interactions between some Plasmodium falciparum and Plasmodium vivax antigens with receptors on erythrocytes and/or reticulocytes.

Pregnancy outcomes and risk of placental malaria after artemisinin-based and quinine-based treatment for uncomplicated falciparum malaria in pregnancy: a WorldWide Antimalarial Resistance Network systematic review and individual patient data meta-analysis

June 2, 2020 - 13:57 -- Open Access
Author(s): 
Saito M, Mansoor R, Guérin PJ, et al.
Reference: 
BMC Med. 2020 Jun 2; 18(1):138

Malaria in pregnancy, including asymptomatic infection, has a detrimental impact on foetal development. Individual patient data (IPD) meta-analysis was conducted to compare the association between antimalarial treatments and adverse pregnancy outcomes, including placental malaria, accompanied with the gestational age at diagnosis of uncomplicated falciparum malaria infection.

Molecular surveillance over 14 years confirms reduction of Plasmodium vivax and falciparum transmission after implementation of Artemisinin-based combination therapy in Papua, Indonesia

May 13, 2020 - 13:51 -- Open Access
Author(s): 
Pava Z, Puspitasari AM, Rumaseb A, Handayuni I, Trianty L, Utami RAS, Tirta YK, Burdam F, Kenangalem E, Wirjanata G, Kho S, Trimarsanto H, Anstey NM, Poespoprodjo JR, Noviyanti R, Price RN, Marfurt J, Auburn S
Reference: 
PLoS Negl Trop Dis 14(5): e0008295

Genetic epidemiology can provide important insights into parasite transmission that can inform public health interventions. The current study compared long-term changes in the genetic diversity and structure of co-endemic Plasmodium falciparum and P. vivax populations. The study was conducted in Papua Indonesia, where high-grade chloroquine resistance in P. falciparum and P. vivax led to a universal policy of Artemisinin-based Combination Therapy (ACT) in 2006.

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