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Plasmodium vivax and treatment

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https://www.readbyqxmd.com/read/28813452/plasma-metabolomics-reveals-membrane-lipids-aspartate-asparagine-and-nucleotide-metabolism-pathway-differences-associated-with-chloroquine-resistance-in-plasmodium-vivax-malaria
#1
Karan Uppal, Jorge L Salinas, Wuelton M Monteiro, Fernando Val, Regina J Cordy, Ken Liu, Gisely C Melo, Andre M Siqueira, Belisa Magalhaes, Mary R Galinski, Marcus V G Lacerda, Dean P Jones
BACKGROUND: Chloroquine (CQ) is the main anti-schizontocidal drug used in the treatment of uncomplicated malaria caused by Plasmodium vivax. Chloroquine resistant P. vivax (PvCR) malaria in the Western Pacific region, Asia and in the Americas indicates a need for biomarkers of resistance to improve therapy and enhance understanding of the mechanisms associated with PvCR. In this study, we compared plasma metabolic profiles of P. vivax malaria patients with PvCR and chloroquine sensitive parasites before treatment to identify potential molecular markers of chloroquine resistance...
2017: PloS One
https://www.readbyqxmd.com/read/28804661/imported-asymptomatic-bancroftian-filariasis-discovered-from-a-plasmodium-vivax-infected-patient-a-case-report-from-singapore
#2
Jean-Marc Chavatte, Roland Jureen
Human lymphatic filariasis is a vector-borne disease mainly caused by the parasitic nematode Wuchereria bancrofti and transmitted worldwide within the tropical and subtropical regions. Singapore was once endemic for bancroftian filariasis but recent reports are scarce and the disease is nearly forgotten. The case report presented here reports the incidental hospital laboratory finding of an asymptomatic microfilaremia in a relapsing Plasmodium vivax imported case during a malaria treatment follow-up appointment...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28798400/characterization-of-p-vivax-blood-stage-transcriptomes-from-field-isolates-reveals-similarities-among-infections-and-complex-gene-isoforms
#3
Adam Kim, Jean Popovici, Amélie Vantaux, Reingsey Samreth, Sophalai Bin, Saorin Kim, Camille Roesch, Li Liang, Huw Davies, Philip Felgner, Sócrates Herrera, Myriam Arévalo-Herrera, Didier Ménard, David Serre
Our understanding of the structure and regulation of Plasmodium vivax genes is limited by our inability to grow the parasites in long-term in vitro cultures. Most P. vivax studies must therefore rely on patient samples, which typically display a low proportion of parasites and asynchronous parasites. Here, we present stranded RNA-seq data generated directly from a small volume of blood from three Cambodian vivax malaria patients collected before treatment. Our analyses show surprising similarities of the parasite gene expression patterns across infections, despite extensive variations in parasite stage proportion...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28797255/barriers-to-routine-g6pd-testing-prior-to-treatment-with-primaquine
#4
Benedikt Ley, Kamala Thriemer, Jessica Jaswal, Eugenie Poirot, Mohammad Shafiul Alam, Ching Swe Phru, Wasif Ali Khan, Lek Dysoley, Gao Qi, Chong Chee Kheong, Ummi Kalthom Shamsudin, Ingrid Chen, Jimee Hwang, Roly Gosling, Ric N Price
BACKGROUND: Primaquine is essential for the radical cure of vivax malaria, however its broad application is hindered by the risk of drug-induced haemolysis in individuals with glucose-6-phosphate-dehydrogenase (G6PD) deficiency. Rapid diagnostic tests capable of diagnosing G6PD deficiency are now available, but these are not used widely. METHODS: A series of qualitative interviews were conducted with policy makers and healthcare providers in four vivax-endemic countries...
August 10, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28770814/malaria
#5
REVIEW
Margaret A Phillips, Jeremy N Burrows, Christine Manyando, Rob Hooft van Huijsduijnen, Wesley C Van Voorhis, Timothy N C Wells
Malaria is caused in humans by five species of single-celled eukaryotic Plasmodium parasites (mainly Plasmodium falciparum and Plasmodium vivax) that are transmitted by the bite of Anopheles spp. mosquitoes. Malaria remains one of the most serious infectious diseases; it threatens nearly half of the world's population and led to hundreds of thousands of deaths in 2015, predominantly among children in Africa. Malaria is managed through a combination of vector control approaches (such as insecticide spraying and the use of insecticide-treated bed nets) and drugs for both treatment and prevention...
August 3, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28761494/underdiagnosed-complicated-plasmodium-vivax-malaria-in-a-child-need-to-think
#6
Sonu Agrawal
Malaria is major cause of morbidity and mortality worldwide. The highest incidence of malaria in the world is South East Asia. India is most affected country followed by Indonesia and Myanmar. The prevalence of malaria varies according to geographical region. Diagnosis of malaria infection has been underestimated. Here, we report a case of under-diagnosed complicated vivax malaria in one-yr-old child in 2016. Early diagnosis and prompt treatment can reduce both morbidity and mortality in complicated malaria infection...
April 2017: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28759593/proteogenomic-analysis-of-the-total-and-surface-exposed-proteomes-of-plasmodium-vivax-salivary-gland-sporozoites
#7
Kristian E Swearingen, Scott E Lindner, Erika L Flannery, Ashley M Vaughan, Robert D Morrison, Rapatbhorn Patrapuvich, Cristian Koepfli, Ivo Muller, Aaron Jex, Robert L Moritz, Stefan H I Kappe, Jetsumon Sattabongkot, Sebastian A Mikolajczak
Plasmodium falciparum and Plasmodium vivax cause the majority of human malaria cases. Research efforts predominantly focus on P. falciparum because of the clinical severity of infection and associated mortality rates. However, P. vivax malaria affects more people in a wider global range. Furthermore, unlike P. falciparum, P. vivax can persist in the liver as dormant hypnozoites that can be activated weeks to years after primary infection, causing relapse of symptomatic blood stages. This feature makes P. vivax unique and difficult to eliminate with the standard tools of vector control and treatment of symptomatic blood stage infection with antimalarial drugs...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28750669/population-level-estimates-of-the-proportion-of-plasmodium-vivax-blood-stage-infections-attributable-to-relapses-among-febrile-patients-attending-adama-malaria-diagnostic-centre-east-shoa-zone-oromia-ethiopia
#8
Lemu Golassa, Michael T White
BACKGROUND: Malaria is ranked as the leading communicable disease in Ethiopia, where Plasmodium falciparum and Plasmodium vivax are co-endemic. The incidence of P. vivax is usually considered to be less seasonal than P. falciparum. Clinical cases of symptomatic P. falciparum exhibit notable seasonal variation, driven by rainfall-dependent variation in the abundance of Anopheles mosquitoes. A similar peak of clinical cases of P. vivax is usually observed during the rainy season. However, the ability of P...
July 27, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28749773/hemolytic-potential-of-tafenoquine-in-female-volunteers-heterozygous-for-glucose-6-phosphate-dehydrogenase-g6pd-deficiency-g6pd-mahidol-variant-versus-g6pd-normal-volunteers
#9
Ronnatrai Rueangweerayut, Germana Bancone, Emma J Harrell, Andrew P Beelen, Supornchai Kongpatanakul, Jörg J Möhrle, Vicki Rousell, Khadeeja Mohamed, Ammar Qureshi, Sushma Narayan, Nushara Yubon, Ann Miller, François H Nosten, Lucio Luzzatto, Stephan Duparc, Jörg-Peter Kleim, Justin A Green
Tafenoquine is an 8-aminoquinoline under investigation for the prevention of relapse in Plasmodium vivax malaria. This open-label, dose-escalation study assessed quantitatively the hemolytic risk with tafenoquine in female healthy volunteers heterozygous for the Mahidol(487A) glucose-6-phosphate dehydrogenase (G6PD)-deficient variant versus G6PD-normal females, and with reference to primaquine. Six G6PD-heterozygous subjects (G6PD enzyme activity 40-60% of normal) and six G6PD-normal subjects per treatment group received single-dose tafenoquine (100, 200, or 300 mg) or primaquine (15 mg × 14 days)...
July 24, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28749403/hiv-malaria-interactions-in-north-east-india-a-prospective-cohort-study
#10
Pradhyumn K Mohapatra, Elsa Pachuau, Chandra Kumar, Biswajit Borkakoty, Eric Zomawia, Achouba Singh, Kamini Walia, Rashmi Arora, Jagdish Mahanta, Sarala K Subbarao
BACKGROUND & OBJECTIVES: The interactions between HIV and malaria co-infection have been shown to influence each other in their clinical outcomes in Sub-Saharan Africa. This study was carried out in the two States of north east India endemic for both HIV and malaria infections, to study the interactions between the two diseases in the HIV-infected population. METHODS: In this prospective study, a total of 333 HIV-infected individuals were followed up for a period of 6-18 months in Mizoram and Manipur during 2010-2011...
March 2017: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28746333/transmission-dynamics-of-co-endemic-plasmodium-vivax-and-p-falciparum-in-ethiopia-and-prevalence-of-antimalarial-resistant-genotypes
#11
Eugenia Lo, Elizabeth Hemming-Schroeder, Delenasaw Yewhalaw, Jennifer Nguyen, Estifanos Kebede, Endalew Zemene, Sisay Getachew, Kora Tushune, Daibin Zhong, Guofa Zhou, Beyene Petros, Guiyun Yan
Ethiopia is one of the few African countries where Plasmodium vivax is co-endemic with P. falciparum. Malaria transmission is seasonal and transmission intensity varies mainly by landscape and climate. Although the recent emergence of drug resistant parasites presents a major issue to malaria control in Ethiopia, little is known about the transmission pathways of parasite species and prevalence of resistant markers. This study used microsatellites to determine population diversity and gene flow patterns of P...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28746018/splenic-abscess-in-immunocompetent-patients-managed-primarily-without-splenectomy-a-series-of-7-cases
#12
S Divyashree, Nikhil Gupta
INTRODUCTION: Splenic abscesses are rare in immunocompetent adults. Despite advances in diagnosis and treatment, these abscesses are still potentially life threatening. Various factors have been reported to predispose otherwise immunocompetent adults to splenic abscesses. Splenectomy was once considered the "gold standard" treatment. However, the trend is shifting to a conservative approach. CASE DESCRIPTION: We describe seven cases of splenic abscess in immunocompetent adults, the cause of which ranged from tuberculosis to salmonella and was as rare as Plasmodium vivax...
2017: Permanente Journal
https://www.readbyqxmd.com/read/28732068/effects-of-liver-stage-clearance-by-primaquine-on-gametocyte-carriage-of-plasmodium-vivax-and-p-falciparum
#13
RANDOMIZED CONTROLLED TRIAL
Rahel Wampfler, Natalie E Hofmann, Stephan Karl, Inoni Betuela, Benson Kinboro, Lina Lorry, Mariabeth Silkey, Leanne J Robinson, Ivo Mueller, Ingrid Felger
BACKGROUND: Primaquine (PQ) is the only currently licensed antimalarial that prevents Plasmodium vivax (Pv) relapses. It also clears mature P. falciparum (Pf) gametocytes, thereby reducing post-treatment transmission. Randomized PQ treatment in a treatment-to-reinfection cohort in Papua New Guinean children permitted the study of Pv and Pf gametocyte carriage after radical cure and to investigate the contribution of Pv relapses. METHODS: Children received radical cure with Chloroquine, Artemether-Lumefantrine plus either PQ or placebo...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28693552/chloroquine-efficacy-for-plasmodium-vivax-in-myanmar-in-populations-with-high-genetic-diversity-and-moderate-parasite-gene-flow
#14
Myo Win Htun, Nan Cho Nwe Mon, Khin Myo Aye, Chan Myae Hlaing, Myat Phone Kyaw, Irene Handayuni, Hidayat Trimarsanto, Dorina Bustos, Pascal Ringwald, Ric N Price, Sarah Auburn, Kamala Thriemer
BACKGROUND: Plasmodium vivax malaria remains a major public health burden in Myanmar. Resistance to chloroquine (CQ), the first-line treatment for P. vivax, has been reported in the country and has potential to undermine local control efforts. METHODS: Patients over 6 years of age with uncomplicated P. vivax mono-infection were enrolled into clinical efficacy studies in Myawaddy in 2014 and Kawthoung in 2012. Study participants received a standard dose of CQ (25 mg/kg over 3 days) followed by weekly review until day 28...
July 10, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28683750/use-of-malaria-rapid-diagnostic-tests-by-community-health-workers-in-afghanistan-cluster-randomised-trial
#15
Toby Leslie, Mark Rowland, Amy Mikhail, Bonnie Cundill, Barbara Willey, Asif Alokozai, Ismail Mayan, Anwar Hasanzai, Sayed Habibullah Baktash, Nader Mohammed, Molly Wood, Habib-U-Rahman Rahimi, Baptiste Laurent, Cyril Buhler, Christopher J M Whitty
BACKGROUND: The World Health Organisation (WHO) recommends parasitological diagnosis of malaria before treatment, but use of malaria rapid diagnostic tests (mRDTs) by community health workers (CHWs) has not been fully tested within health services in south and central Asia. mRDTs could allow CHWs to diagnose malaria accurately, improving treatment of febrile illness. METHODS: A cluster randomised trial in community health services was undertaken in Afghanistan. The primary outcome was the proportion of suspected malaria cases correctly treated for polymerase chain reaction (PCR)-confirmed malaria and PCR negative cases receiving no antimalarial drugs measured at the level of the patient...
July 7, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28683669/development-of-loop-mediated-isothermal-amplification-with-plasmodium-falciparum-unique-genes-for-molecular-diagnosis-of-human-malaria
#16
Yijing Zhang, Yi Yao, Weixing Du, Kai Wu, Wenyue Xu, Min Lin, Huabing Tan, Jian Li
In order to achieve better outcomes for treatment and in the prophylaxis of malaria, it is imperative to develop a sensitive, specific, and accurate assay for early diagnosis of Plasmodium falciparum infection, which is the major cause of malaria. In this study, we aimed to develop a loop-mediated isothermal amplification (LAMP) assay with P. falciparum unique genes for sensitive, specific, and accurate detection of P. falciparum infection. The unique genes of P. falciparum were randomly selected from PlasmoDB...
July 6, 2017: Pathogens and Global Health
https://www.readbyqxmd.com/read/28676055/malaria-in-brazil-colombia-peru-and-venezuela-current-challenges-in-malaria-control-and-elimination
#17
REVIEW
Judith Recht, André M Siqueira, Wuelton M Monteiro, Sonia M Herrera, Sócrates Herrera, Marcus V G Lacerda
In spite of significant progress towards malaria control and elimination achieved in South America in the 2000s, this mosquito-transmitted tropical disease remains an important public health concern in the region. Most malaria cases in South America come from Amazon rain forest areas in northern countries, where more than half of malaria is caused by Plasmodium vivax, while Plasmodium falciparum malaria incidence has decreased in recent years. This review discusses current malaria data, policies and challenges in four South American Amazon countries: Brazil, Colombia, Peru and the Bolivarian Republic of Venezuela...
July 4, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28673348/anti-malarial-treatment-outcomes-in-ethiopia-a-systematic-review-and-meta-analysis
#18
Eyob Alemayehu Gebreyohannes, Akshaya Srikanth Bhagavathula, Mohammed Assen Seid, Henok Getachew Tegegn
BACKGROUND: Ethiopia is among countries with a high malaria burden. There are several studies that assessed the efficacy of anti-malarial agents in the country and this systematic review and meta-analysis was performed to obtain stronger evidence on treatment outcomes of malaria from the existing literature in Ethiopia. METHODS: A systematic literature search using the preferred reporting items for systematic review and meta-analysis (PRISMA) statement was conducted on studies from Pubmed, Google Scholar, and ScienceDirect databases to identify published and unpublished literature...
July 3, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28667326/quantitative-proteomics-analysis-of-plasmodium-vivax-induced-alterations-in-human-serum-during-the-acute-and-convalescent-phases-of-infection
#19
Sandipan Ray, Sandip K Patel, Apoorva Venkatesh, Gangadhar Chatterjee, Naziya N Ansari, Nithya J Gogtay, Urmila M Thatte, Prajakta Gandhe, Santosh G Varma, Swati Patankar, Sanjeeva Srivastava
The radial distribution of Plasmodium vivax malaria burden has evoked enormous concern among the global research community. In this study, we have investigated the serum proteome alterations in non-severe vivax malaria patients before and during patient recuperation starting from the early febrile to the defervescence and convalescent stages of the infection. We have also performed an extensive quantitative proteomics analysis to compare the serum proteome profiles of vivax malaria patients with low (LPVM) and moderately-high (MPVM) parasitemia with healthy community controls...
June 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28626547/structure-guided-optimization-of-quinoline-inhibitors-of-plasmodium-n-myristoyltransferase
#20
Victor Goncalves, James A Brannigan, Alice Laporte, Andrew S Bell, Shirley M Roberts, Anthony J Wilkinson, Robin J Leatherbarrow, Edward W Tate
The parasite Plasmodium vivax is the most widely distributed cause of recurring malaria. N-Myristoyltransferase (NMT), an enzyme that catalyses the covalent attachment of myristate to the N-terminal glycine of substrate proteins, has been described as a potential target for the treatment of this disease. Herein, we report the synthesis and the structure-guided optimization of a series of quinolines with balanced activity against both Plasmodium vivax and Plasmodium falciparum N-myristoyltransferase (NMT).
January 1, 2017: MedChemComm
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