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https://www.readbyqxmd.com/read/28630585/identification-of-the-plasmodium-species-in-clinical-samples-from-children-residing-in-five-epidemiological-strata-of-malaria-in-cameroon
#1
Tebit Emmanuel Kwenti, Tayong Dizzle Bita Kwenti, Longdoh Anna Njunda, Andreas Latz, Kukwah Anthony Tufon, Theresa Nkuo-Akenji
BACKGROUND: Malaria in Cameroon was previously known to be caused solely by Plasmodium falciparum but today, evidence points to other Plasmodium species including P. vivax, P. ovale and P. malariae. The purpose of this study was to identify the Plasmodium species in clinical samples from children residing in five epidemiological strata of malaria in Cameroon, so as to advise control policies. METHODS: One thousand six hundred nine febrile children (≤15 years) were recruited from five epidemiological strata of malaria including the Sudano-sahelian (SS) strata, the High inland plateau (HIP) strata, the South Cameroonian Equatorial forest (SCEF) strata, the High western plateau (HWP) strata and the Coastal (C) strata...
2017: Tropical Medicine and Health
https://www.readbyqxmd.com/read/28617870/a-novel-genetic-technique-in-plasmodium-berghei-allows-liver-stage-analysis-of-genes-required-for-mosquito-stage-development-and-demonstrates-that-de-novo-heme-synthesis-is-essential-for-liver-stage-development-in-the-malaria-parasite
#2
Upeksha L Rathnapala, Christopher D Goodman, Geoffrey I McFadden
The combination of drug resistance, lack of an effective vaccine, and ongoing conflict and poverty means that malaria remains a major global health crisis. Understanding metabolic pathways at all parasite life stages is important in prioritising and targeting novel anti-parasitic compounds. The unusual heme synthesis pathway of the rodent malaria parasite, Plasmodium berghei, requires eight enzymes distributed across the mitochondrion, apicoplast and cytoplasm. Deletion of the ferrochelatase (FC) gene, the final enzyme in the pathway, confirms that heme synthesis is not essential in the red blood cell stages of the life cycle but is required to complete oocyst development in mosquitoes...
June 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28612053/micro-epidemiological-structuring-of-plasmodium-falciparum-parasite-populations-in-regions-with-varying-transmission-intensities-in-africa
#3
Irene Omedo, Polycarp Mogeni, Teun Bousema, Kirk Rockett, Alfred Amambua-Ngwa, Isabella Oyier, Jennifer C Stevenson, Amrish Y Baidjoe, Etienne P de Villiers, Greg Fegan, Amanda Ross, Christina Hubbart, Anne Jeffreys, Thomas N Williams, Dominic Kwiatkowski, Philip Bejon
Background: The first models of malaria transmission assumed a completely mixed and homogeneous population of parasites.  Recent models include spatial heterogeneity and variably mixed populations. However, there are few empiric estimates of parasite mixing with which to parametize such models. Methods: Here we genotype 276 single nucleotide polymorphisms (SNPs) in 5199 P. falciparum isolates from two Kenyan sites and one Gambian site to determine the spatio-temporal extent of parasite mixing, and use Principal Component Analysis (PCA) and linear regression to examine the relationship between genetic relatedness and relatedness in space and time for parasite pairs...
2017: Wellcome Open Research
https://www.readbyqxmd.com/read/28597978/pharmacokinetics-of-sulfadoxine-and-pyrimethamine-for-intermittent-preventive-treatment-of-malaria-during-pregnancy-and-after-delivery
#4
M de Kock, J Tarning, L Workman, M M Nyunt, I Adam, K I Barnes, P Denti
Sulfadoxine/pyrimethamine is recommended for intermittent preventative treatment of malaria during pregnancy. Data from 98 women during pregnancy and 77 after delivery in four African countries were analyzed using nonlinear mixed-effects modeling to characterize the effects of pregnancy, postpartum duration, and other covariates such as body weight and hematocrit on sulfadoxine/pyrimethamine pharmacokinetic properties. During pregnancy, clearance increased 3-fold for sulfadoxine but decreased by 18% for pyrimethamine...
June 9, 2017: CPT: Pharmacometrics & Systems Pharmacology
https://www.readbyqxmd.com/read/28588992/introducing-rapid-tests-for-malaria-into-the-retail-sector-what-are-the-unintended-consequences
#5
Eleanor Hutchinson, Coll Hutchison, Sham Lal, Kristian Hansen, Miriam Kayendeke, Christine Nabirye, Pascal Magnussen, Siân E Clarke, Anthony Mbonye, Clare I R Chandler
The observation that many people in Africa seek care for febrile illness in the retail sector has led to a number of public health initiatives to try to improve the quality of care provided in these settings. The potential to support the introduction of rapid diagnostic tests for malaria (mRDTs) into drug shops is coming under increased scrutiny. Those in favour argue that it enables the harmonisation of policy around testing and treatment for malaria and maintains a focus on market-based solutions to healthcare...
January 2017: BMJ Global Health
https://www.readbyqxmd.com/read/28587600/performance-comparison-of-carestart%C3%A2-hrp2-pldh-combo-rapid-malaria-test-with-light-microscopy-in-north-western-tigray-ethiopia-a-cross-sectional-study
#6
Daniel Getacher Feleke, Shambel Tarko, Haftom Hadush
BACKGROUND: Rapid diagnostic tests (RDTs) are alternative methods for microscopy in the diagnosis of malaria in resource limited settings. Among commercially available RDTs, CareStart™ Malaria test was found to show reliable results. This study evaluated the performance of CareStart™ Malaria Combo test kit in Northwestern Tigray in Ethiopia. METHODS: Blood samples were collected from 320 malaria-suspected patients at Mayani Hospital in Northwestern Tigray from December 2015 to March 2016...
June 6, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28577560/research-dissemination-workshops-observations-and-implications-based-on-an-experience-in-burkina-faso
#7
Esther Mc Sween-Cadieux, Christian Dagenais, Paul-André Somé, Valéry Ridde
BACKGROUND: In Burkina Faso, malaria remains the primary cause of healthcare use, morbidity and child mortality. Therefore, efforts are needed to support the knowledge transfer and application of the results of numerous studies to better formulate and implement programs in the fight against the malaria pandemic. To this end, a 2-day dissemination workshop was held to share the most recent results produced by a multidisciplinary research team. The objective of the present study was to evaluate the workshop and the policy briefs distributed there, the effects these produced on research results use and the processes that facilitated, or not, the application of the knowledge transmitted...
June 2, 2017: Health Research Policy and Systems
https://www.readbyqxmd.com/read/28566625/effective-loading-of-platinum-chloroquine-into-pegylated-neutral-and-cationic-liposomes-as-a-drug-delivery-system-for-resistant-malaria-parasites
#8
Shaimaa Ibrahim, Tatsuaki Tagami, Tetsuya Ozeki
The trans platinum-chloroquine diphosphate dichloride (PtCQ) is a new type of antimalarial drug used to fight parasites resistant to traditional drugs. PtCQ is synthesized by mixing platinum and chloroquine diphosphate (CQ). This study examines two efficient methods for forming a nanodrug, PtCQ-loaded liposomes, for use as a potential antimalarial drug-delivery system: the thin drug-lipid film method to incorporate the drug into a liposomal membrane, and a remote-loading method to load the drug into the interior of a cationic liposome...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28545583/private-sector-role-readiness-and-performance-for-malaria-case-management-in-uganda-2015
#9
Henry Kaula, Peter Buyungo, Jimmy Opigo
BACKGROUND: Several interventions have been put in place to promote access to quality malaria case management services in Uganda's private sector, where most people seek treatment. This paper describes evidence using a mixed-method approach to examine the role, readiness and performance of private providers at a national level in Uganda. These data will be useful to inform strategies and policies for improving malaria case management in the private sector. METHODS: The ACTwatch national anti-malarial outlet survey was conducted concurrently with a fever case management study...
May 25, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28544379/a-widened-substrate-selectivity-filter-of-eukaryotic-formate-nitrite-transporters-enables-high-level-lactate-conductance
#10
Marie Wiechert, Holger Erler, André Golldack, Eric Beitz
Bacterial formate-nitrite transporters (FNT) regulate the metabolic flow of small weak mono-acids derived from anaerobic mixed-acid fermentation, such as formate, and further transport nitrite, and hydrosulfide. The eukaryotic Plasmodium falciparum FNT is vital for the malaria parasite by its ability to release the larger l-lactate substrate as the metabolic end product of anaerobic glycolysis in symport with protons preventing cytosolic acidification. However, the molecular basis for substrate discrimination by FNTs has remained unclear...
May 21, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28540269/species-dependent-clinical-findings-of-malaria-caused-by-various-plasmodia-in-an-endemic-area-of-kerman-province-southeastern-iran
#11
Mehdi Nateghpour, Ali Hosseininasab, Mehrdad Farrokhnia, Foroughieh Dastouri, Katayun Alidoosti, Dadkhoda Sadequi, Asadollah Ahmadi
BACKGROUND: Malaria is a big problem of public health in many tropical countries where socioeconomic development is deficient. Four species of plasmodium are capable of infecting human: P. falciparum, P. malaria, P.vivax, P. ovale. Southeastern corner of Iran, including Sistan and Baluchestan, Hormozgan and the tropical part of Kerman Province, are endemic region of malaria. This study aimed to find out clinical findings in malaria caused by various plasmodium species in moderate transmission area of southern Kerman Province...
April 2017: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/28521791/exploring-the-role-of-socioeconomic-factors-in-the-development-and-spread-of-anti-malarial-drug-resistance-a-qualitative-study
#12
Philip Emeka Anyanwu, John Fulton, Etta Evans, Timothy Paget
BACKGROUND: Malaria remains a global health issue with the burden unevenly distributed to the disadvantage of the developing countries of the world. Poverty contributes to the malaria burden as it has the ability to affect integral aspects of malaria control. There have been renewed efforts in the global malaria control, resulting in reductions in the global malaria burden over the last decade. However, the development of resistance to artemisinin-based combination therapy threatens the sustainability of the present success in malaria control...
May 18, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28502184/promoting-community-malaria-control-in-rural-myanmar-through-an-active-community-participation-program-using-the-participatory-learning-approach
#13
Chan Nyein Maung, Than Tun Sein, Thaung Hlaing, Kamolnetr Okanurak, Tassanee Silawan, Jaranit Kaewkungwal
INTRODUCTION: Malaria is prevalent in more than 80% of townships in Myanmar. The National Malaria Control Programme (NMCP) has been implementing community-based malaria control programs nationwide. However, these programs are mostly developed and directed by health authorities, while communities are passively involved. This study aimed to increase community participation in malaria control and promote community malaria control knowledge and practice in rural Myanmar. METHODS: A community-based study, which employed a mixed method approach, collecting data quantitatively and qualitatively, was conducted in two rural villages...
April 2017: Rural and Remote Health
https://www.readbyqxmd.com/read/28497225/development-of-a-rapid-hrm-qpcr-for-the-diagnosis-of-the-four-most-prevalent-plasmodium-lineages-in-new-zealand
#14
E R Schoener, S Hunter, L Howe
Although wildlife rehabilitation and translocations are important tools in wildlife conservation in New Zealand, disease screening of birds has not been standardized. Additionally, the results of the screening programmes are often difficult to interpret due to missing disease data in resident or translocating avian populations. Molecular methods have become the most widespread method for diagnosing avian malaria (Plasmodium spp.) infections. However, these methods can be time-consuming, expensive and are less specific in diagnosing mixed infections...
July 2017: Parasitology Research
https://www.readbyqxmd.com/read/28482891/evaluation-of-efficacy-of-interceptor-%C3%A2-g2-a-long-lasting-insecticide-net-coated-with-a-mixture-of-chlorfenapyr-and-alpha-cypermethrin-against-pyrethroid-resistant-anopheles-gambiae-s-l-in-burkina-faso
#15
Koama Bayili, Severin N'do, Moussa Namountougou, Roger Sanou, Abdoulaye Ouattara, Roch K Dabiré, Anicet G Ouédraogo, David Malone, Abdoulaye Diabaté
BACKGROUND: Malaria vectors have acquired widespread resistance throughout sub-Saharan Africa to many of the currently used insecticides. Hence, there is an urgent need to develop alternative strategies including the development of new insecticides for effective management of insecticide resistance. To maintain progress against malaria, it is necessary to identify other residual insecticides for mosquito nets. In the present WHOPES phase II analogue study, the utility of chlorfenapyr, a pyrrole class insecticide mixed with alpha-cypermethrin on a long-lasting mosquito bed net was evaluated against Anopheles gambiae s...
May 8, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28481286/infectious-diseases-and-tropical-cyclones-in-southeast-china
#16
Jietao Zheng, Weixiao Han, Baofa Jiang, Wei Ma, Ying Zhang
Southeast China is frequently hit by tropical cyclones (TCs) with significant economic and health burdens each year. However, there is a lack of understanding of what infectious diseases could be affected by tropical cyclones. This study aimed to examine the impacts of tropical cyclones on notifiable infectious diseases in southeast China. Disease data between 2005 and 2011 from four coastal provinces in southeast China, including Guangdong, Hainan, Zhejiang, and Fujian province, were collected. Numbers of cases of 14 infectious diseases were compared between risk periods and reference periods for each tropical cyclone...
May 7, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28479922/laboratory-diagnosis-of-malaria-comparison-of-manual-and-automated-diagnostic-tests
#17
Samina Naz Mukry, Madiha Saud, Gul Sufaida, Kashif Shaikh, Arshi Naz, Tahir Sultan Shamsi
Malaria is the second most prevalent disease in Pakistan resulting in ~30,000 annual deaths. In endemic countries like Pakistan precise and timely diagnosis of malaria is imperative to overcome the associated risks of fatal outcomes. Malarial parasite was screened in 128 malaria suspected patients and 150 healthy controls, by species-specific PCR, microscopy of blood smears, hemoanalyzer Sysmex XE-2100, and rapid test devices (First Response Malaria® and ICT Malaria Combo®). The microscopy detected MP in 126 samples (parasite load/µl 386-53712/µl); 71...
2017: Canadian Journal of Infectious Diseases & Medical Microbiology
https://www.readbyqxmd.com/read/28479726/anti-plasmodial-and-chloroquine-resistance-suppressive-effects-of-embelin
#18
O I Zaid, R Abd Majid, M S Hasidah, M N Sabariah, K Al-Zihiry, Sattar Rahi, R Basir
BACKGROUND: Emergence of chloroquine (CQ) resistance among different strains of Plasmodium falciparum is the worst catastrophe that has ever perplexed the dedicated efforts to eradicate malaria. This urged the scientists to search for new alternatives or sensitizers to augment its antiplasmodium effect. MATERIALS AND METHOD: In this experiment, the potential of embelin, isolated from Embelia ribes, to inhibit the growth and sensitize CQ action was screened using SYBRE-green-I based drug sensitivity and isobologram assays, respectively...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28464959/temporal-genetic-changes-in-plasmodium-vivax-apical-membrane-antigen-1-over-19%C3%A2-years-of-transmission-in-southern-mexico
#19
Alejandro Flores-Alanis, Lilia González-Cerón, Frida Santillán, Cecilia Ximenez, Marco A Sandoval, René Cerritos
BACKGROUND: Mexico advanced to the pre-elimination phase in 2009 due to a significant reduction in malaria cases, and since 2000, Plasmodium vivax is the only species transmitted. During the last two decades, malaria transmission has been mostly local and isolated to a few regions. It is important to gain further insights into the impact of control measures on the parasite population structure. Hence, the aim of the current study was to determine detailed changes in P. vivax genetic diversity and population structure based on analysing the gene that encodes the apical membrane antigen 1 (pvama1)...
May 2, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28460016/physicians-compliance-with-the-national-drug-policy-on-malaria-in-a-tertiary-teaching-hospital-india-from-2010-to-2015-a-mixed-method-study
#20
Soundappan Kathirvel, Jaya Prasad Tripathy, Zaw Myo Tun, Binod Kumar Patro, Tarundeep Singh, Ashish Bhalla, Mahesh Devnani, Ewan Wilkinson
Background: National drug policies are formulated to encourage rational use of drugs and to reduce drug resistance. This study assessed physicians' compliance with the National Drug Policy on Malaria at a tertiary care hospital in north India. Methods: This mixed method study extracted data from adult malaria inpatient records of the hospital from 2010-2015, and assessed drug supply at pharmacies. Physicians' practices and perspectives were explored by in-depth interviews...
February 1, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
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