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meta-analysis

The duration of chemoprophylaxis against malaria after treatment with artesunate-amodiaquine and artemether-lumefantrine and the effects of pfmdr1 86Y and pfcrt 76T: a meta-analysis of individual patient data

March 2, 2020 - 15:29 -- Open Access
Author(s): 
Bretscher MT, Dahal P, Okell LC, et al.
Reference: 
BMC Med. 2020 Feb 25; 18(1):47

The majority of Plasmodium falciparum malaria cases in Africa are treated with the artemisinin combination therapies artemether-lumefantrine (AL) and artesunate-amodiaquine (AS-AQ), with amodiaquine being also widely used as part of seasonal malaria chemoprevention programs combined with sulfadoxine-pyrimethamine. While artemisinin derivatives have a short half-life, lumefantrine and amodiaquine may give rise to differing durations of post-treatment prophylaxis, an important additional benefit to patients in higher transmission areas.

Drug-drug Interactions between Lumefantrine and Commonly-used Antiretroviral Treatment: An Individual Participant Data Population Pharmacokinetic Meta-Analysis

February 24, 2020 - 14:10 -- Open Access
Author(s): 
Francis J, Barnes KI, Denti P, et al.
Reference: 
Antimicrob Agents Chemother. 2020 Feb 18. pii: AAC.02394-19

Treating malaria in HIV co-infected individuals should consider potential drug-drug interactions. Artemether-lumefantrine is the most widely recommended treatment for uncomplicated malaria globally. Lumefantrine is metabolized by CYP3A4, an enzyme that commonly-used antiretrovirals often induce or inhibit. A population pharmacokinetic meta-analysis was conducted using individual participant data from ten studies, with 6,100 lumefantrine concentrations from 793 non-pregnant adult participants (41% HIV-malaria co-infected, 36% malaria-infected, 20% HIV-infected, and 3% healthy volunteers).

NOT Open Access | Single dose tafenoquine for preventing relapse in people with plasmodium vivax malaria-an updated meta-analysis

February 14, 2020 - 16:59 -- NOT Open Access
Author(s): 
Anjum MU, Naveed AK, Mahmood SN, Naveed OK
Reference: 
Travel Med Infect Dis. 2020 Feb 6:101576

Plasmodium vivax is a frequent cause of recurring malaria in endemic areas as in its latent stage it resides in liver, and is responsible for relapse.

Treatment with 8 aminoquinoline Primaquine is given for 14 days, however studies have shown dismal results with adherence to therapy. A new long acting 8 aminoquinoline, Tafenoquine was introduced that showed efficacy and safety almost similar to Primaquine in a single dose regimen, hence giving hopes for improved compliance and help in eradicating malaria.

Prevalence of Plasmodium falciparum field isolates with deletions in histidine-rich protein 2 and 3 genes in context with sub-Saharan Africa and India: a systematic review and meta-analysis

February 3, 2020 - 16:36 -- Open Access
Author(s): 
Loick P. Kojom and Vineeta Singh
Reference: 
Malaria Journal 2020 19:46, 28 January 2020

In 2017, nearly 80% of malaria morbidity and mortality occurred in sub-Saharan African (SSA) countries and India. Rapid diagnostic tests (RDTs), especially those targeting histidine-rich protein 2 (PfHRP2) of Plasmodium falciparum, have become an important diagnostic tool in these malaria-endemic areas. However, the chances of RDT-oriented successful treatment are increasingly jeopardized by the appearance of mutants with deletions in pfhrp2 and pfhrp3 genes. This systematic review and meta-analysis determines the prevalence of field P. falciparum isolates with deletion in pfhrp2 and/or pfhrp3 genes and their proportion among false-negative results in the PfHRP2-based RDTs in SSA and India.

Efficacy of antimalarial drugs for treatment of uncomplicated falciparum malaria in Asian region: A network meta-analysis

December 23, 2019 - 16:09 -- Open Access
Author(s): 
Naing C, Whittaker MA, Htet NH, Aye SN, Mak JW
Reference: 
PLoS ONE 14(12): e0225882

The WHO recommends artemisinin-based combination therapies (ACTs) for the treatment of uncomplicated falciparum malaria. Hence, monitoring the efficacy of antimalarial drugs is a key component of malaria control and elimination. The published randomized trials that assessed comparisons of ACTs for treating uncomplicated falciparum malaria reported conflicting results in treatment efficacy. A network meta-analysis is an extension of pairwise meta-analysis that can synthesize evidence simultaneously from both direct and indirect treatment comparisons. The objective was to synthesize evidence on the comparative efficacy of antimalarial drugs for treatment of uncomplicated falciparum malaria in Asian region.

Infected Mosquitoes Have Altered Behavior to Repellents: A Systematic Review and Meta-analysis

November 26, 2019 - 13:58 -- Open Access
Author(s): 
Lajeunesse MJ, Avello DA, Yanez NE, et al.
Reference: 
Journal of Medical Entomology, tjz209 22 November 2019

Here we conducted a systematic review and meta-analysis to reach a consensus on whether infected and uninfected mosquitoes respond differently to repellents. After screening 2,316 published studies, theses, and conference abstracts, we identified 18 studies that tested whether infection status modulated the effectiveness of repellents. Thirteen of these studies had outcomes available for meta-analysis, and overall, seven repellents were tested (typically DEET with 62% of outcomes), six mosquito species had repellence behaviors measured (typically Aedes aegypti (L.) (Diptera: Culicidae) mosquitoes with 71% of outcomes), and a broad diversity of infections were tested including Sindbis virus (Togaviridae: Alphavirus) (33% of outcomes), Dengue (Flaviviridae: Flavivirus) (31%), malaria (Plasmodium berghei Vincke & Lips (Haemospororida: Plasmodiidae) or P. falciparum Welch (Haemospororida: Plasmodiidae); 25%), Zika (Flaviviridae: Flavivirus) (7%), and microsporidia (4%).

Relationship Between Pregnancy-Associated Malaria and Adverse Pregnancy Outcomes: a Systematic Review and Meta-Analysis

October 15, 2019 - 15:27 -- Open Access
Author(s): 
Julie M Thompson, Stephanie M Eick, Cody Dailey, Ariella P Dale, Mansi Mehta, Anjali Nair, Jose F. Cordero and Michael Welton
Reference: 
Journal of Tropical Pediatrics, fmz068

Pregnancy-associated malaria (PAM) has been associated with adverse pregnancy outcomes like preterm birth (PTB) and low birthweight (LBW), which are among the leading causes of infant mortality globally. Rates of PTB and LBW are high in countries with a high burden of malaria. PAM may be a contributing factor to PTB and LBW, but is not well understood.

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