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World Health Organization

The lack of K13-propeller mutations associated with artemisinin resistance in Plasmodium falciparum in Democratic Republic of Congo (DRC)

August 25, 2020 - 07:55 -- Open Access
Author(s): 
Yobi DM, Kayiba NK, Mvumbi DM, Boreux R, Bontems S, Kabututu PZ, De Mol P, Speybroeck N, Mvumbi GL, Hayette MP
Reference: 
PLoS One. 2020 Aug 21;15(8):e0237791

Artemisinin-based combination therapies (ACTs) have been recommended by the World Health Organization (WHO) as first-line treatment of uncomplicated Plasmodium falciparum (P. falciparum) malaria since 2005 in Democratic Republic of Congo (DRC) and a regular surveillance of the ACT efficacy is required to ensure the treatment effectiveness. Mutations in the propeller domain of the pfk13 gene were identified as molecular markers of artemisinin resistance (ART-R).

NOT Open Access | Pandemic's fallout on malaria control appears limited so far

August 24, 2020 - 15:06 -- NOT Open Access
Author(s): 
Roberts L
Reference: 
Science. 2020 Aug 21;369(6506):892

Back in March when COVID-19 hit, some scientists worried malaria cases and deaths might soar. African countries went on lockdown; worried about mass gatherings, they suspended campaigns to distribute mosquito-fighting bed nets. Fears abounded that with clinics overwhelmed by COVID-19, patients would be unable to get treatment for malaria.

New Mosquitocide Derived From Volcanic Rock

August 22, 2020 - 09:39 -- Open Access
Author(s): 
Deguenon JM, Riegel C, Cloherty-Duvernay ER, Chen K, Stewart DA, Wang B, Gittins D, Tihomirov L, Apperson CS, McCord MG, Roe RM
Reference: 
J Med Entomol. 2020 Aug 18:tjaa141

Malaria, dengue, yellow fever, and the Zika and West Nile Viruses are major vector-borne diseases of humans transmitted by mosquitoes. According to the World Health Organization, over 80% of the world's population is at risk of contacting these diseases. Insecticides are critical for mosquito control and disease prevention, and insect insecticide resistance is on the increase; new alternatives with potentially different modes of action from current chemistry are needed.

A multiphase program for malaria elimination in southern Mozambique (the Magude project): A before-after study

August 18, 2020 - 15:00 -- Open Access
Author(s): 
Galatas B, Saúte F, Martí-Soler H, Aide P, et al.
Reference: 
PLoS Med. 2020 Aug 14;17(8):e1003227

Malaria eradication remains the long-term vision of the World Health Organization (WHO). However, whether malaria elimination is feasible in areas of stable transmission in sub-Saharan Africa with currently available tools remains a subject of debate. This study aimed to evaluate a multiphased malaria elimination project to interrupt Plasmodium falciparum malaria transmission in a rural district of southern Mozambique.

Assessment of molecular markers of anti-malarial drug resistance among children participating in a therapeutic efficacy study in western Kenya

August 17, 2020 - 13:34 -- Open Access
Author(s): 
Winnie Chebore, Zhiyong Zhou, Simon Kariuki, et al.
Reference: 
Malaria Journal 2020 19:291, 14 August 2020

Anti-malarial drug resistance remains a major threat to global malaria control efforts. In Africa, Plasmodium falciparum remains susceptible to artemisinin-based combination therapy (ACT), but the emergence of resistant parasites in multiple countries in Southeast Asia and concerns over emergence and/or spread of resistant parasites in Africa warrants continuous monitoring. The World Health Organization recommends that surveillance for molecular markers of resistance be included within therapeutic efficacy studies (TES). The current study assessed molecular markers associated with resistance to Artemether−lumefantrine (AL) and Dihydroartemisinin−piperaquine (DP) from samples collected from children aged 6–59 months enrolled in a TES conducted in Siaya County, western Kenya from 2016 to 2017.

G6PD deficiency in malaria endemic areas of Nepal

August 17, 2020 - 13:24 -- Open Access
Author(s): 
Baburam Marasini, Bibek Kumar Lal, Bhim Prasad Acharya, et al.
Reference: 
Malaria Journal 2020 19:287, 12 August 2020

Glucose-6-phosphate dehydrogenase (G6PD) deficiency is currently a threat to malaria elimination due to risk of primaquine-induced haemolysis in G6PD deficient individuals. The World Health Organization (WHO) recommends G6PD screening before providing primaquine as a radical treatment against vivax malaria. However, evidence regarding the prevalence and causing mutations of G6PD deficiency in Nepal is scarce.

NOT Open Access | The antimalarial activity of indole alkaloids and hybrids

August 17, 2020 - 13:10 -- NOT Open Access
Author(s): 
Li JY, Sun XF, Li JJ, Yu F, Zhang Y, Huang XJ, Jiang FX
Reference: 
Arch Pharm (Weinheim). 2020 Aug 12:e2000131

Malaria, caused by the genus Plasmodium, remains a global public health concern. It is estimated by the World Health Organization that over 40% of the world's population lives in areas at risk for malarial transmission, and around half a million people succumb to this infectious disease annually, which is related to the rapid spread of drug-resistant parasite strains.

A cluster randomized trial of delivery of intermittent preventive treatment of malaria in pregnancy at the community level in Burkina Faso

August 10, 2020 - 14:54 -- Open Access
Author(s): 
Julie R. Gutman, Daniel K. Stephens, Justin Tiendrebeogo, Ousmane Badolo, Mathurin Dodo, Danielle Burke, John Williamson, Kristen Vibbert, Susan J. Youll, Yacouba Savadogo and William R. Brieger
Reference: 
Malaria Journal 2020 19:282, 5 August 2020

Malaria in pregnancy is responsible for 8–14% of low birth weight and 20% of stillbirths in sub-Saharan Africa. To prevent these adverse consequences, the World Health Organization recommends intermittent preventive treatment of pregnant women (IPTp) with sulfadoxine–pyrimethamine be administered at each ANC visit starting as early as possible in the second trimester. Global IPTp coverage in targeted countries remains unacceptably low. Community delivery of IPTp was explored as a means to improve coverage.

One-step PCR: A novel protocol for determination of pfhrp2 deletion status in Plasmodium falciparum

July 27, 2020 - 12:21 -- Open Access
Author(s): 
Jones S, Subramaniam G, Plucinski MM, Patel D, Padilla J, Aidoo M, Talundzic E
Reference: 
PLoS ONE 15(7): e0236369

Histidine-rich protein 2 (HRP2) detecting rapid diagnostic tests (RDTs) have played an important role in enabling prompt malaria diagnosis in remote locations. However, emergence of pfhrp2 deleted parasites is threatening the efficacy of RDTs, and the World Health Organization (WHO) has highlighted surveillance of these deletions as a priority. Nested PCR is used to confirm pfhrp2 deletion but is costly and laborious.

Indoor spraying with chlorfenapyr (a pyrrole insecticide) provides residual control of pyrethroid-resistant malaria vectors in southern Benin

July 14, 2020 - 09:47 -- Open Access
Author(s): 
Corine Ngufor, Augustin Fongnikin, Neil Hobbs, Martial Gbegbo, Laurette Kiki, Abibath Odjo, Martin Akogbeto and Mark Rowland
Reference: 
Malaria Journal 2020 19:249, 13 July 2020

New classes of insecticides with novel modes of action, which can provide effective and prolonged control of insecticide-resistant malaria vector populations, are urgently needed for indoor residual spraying. Such insecticides can be included in a rotation plan to manage and prevent further development of resistance in mosquito vectors of malaria. Chlorfenapyr, a novel pyrrole insecticide with a unique mode of action, is being developed as a long-lasting IRS formulation.

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