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malaria microscopy

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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/28618230/anti-mosquito-activity-of-a-titanium-organic-framework-supported-on-fabrics
#2
Reda M Abdelhameed, Omnia M H M Kamel, A Amr, Joao Rocha, Artur M S Silva
Waste swamps, stagnant water and poor hygiene practices result in the proliferation of mosquitoes that may cause transmissible and infectious diseases, such as malaria, typhoid, cholera, and Zikavirus sickness. Composites of the traditional natural fibres cotton, viscose and linen, and a Ti-bearing metal-organic framework, NH2-MIL-125, is very effective against mosquitoes, in the absence of any conventional insecticides. Prior to coating with NH2-MIL-125 crystals, the fabrics have been modified with 3-glycidyloxypropyltrimethoxysilane...
June 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28609010/submicroscopic-malaria-infections-in-pregnant-women-from-six-departments-in-haiti
#3
Maha A Elbadry, Massimiliano S Tagliamonte, Christian P Raccurt, Jean F Lemoine, Alexandre Existe, Jacques Boncy, Thomas A Weppelman, John B Dame, Bernard A Okech
OBJECTIVES: To describe the epidemiology of malaria in pregnancy in Haiti. METHODS: Cross-sectional study among pregnant women in 6 departments of Haiti. After obtaining informed consent, whole blood samples and demographic surveys were collected to investigate malaria prevalence, anemia and socio-behavioral risk factors for infection, respectively. 311 pregnant women were screened for Plasmodium falciparum infection using a rapid diagnostic test (RDT), microscopy, and a novel, quantitative reverse-transcriptase polymerase chain reaction method (qRT-PCR)...
June 13, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28604825/burden-and-impact-of-plasmodium-vivax-in-pregnancy-a-multi-centre-prospective-observational-study
#4
Azucena Bardají, Flor Ernestina Martínez-Espinosa, Myriam Arévalo-Herrera, Norma Padilla, Swati Kochar, Maria Ome-Kaius, Camila Bôtto-Menezes, María Eugenia Castellanos, Dhanpat Kumar Kochar, Sanjay Kumar Kochar, Inoni Betuela, Ivo Mueller, Stephen Rogerson, Chetan Chitnis, Dhiraj Hans, Michela Menegon, Carlo Severini, Hernando Del Portillo, Carlota Dobaño, Alfredo Mayor, Jaume Ordi, Mireia Piqueras, Sergi Sanz, Mats Wahlgren, Laurence Slutsker, Meghna Desai, Clara Menéndez
BACKGROUND: Despite that over 90 million pregnancies are at risk of Plasmodium vivax infection annually, little is known about the epidemiology and impact of the infection in pregnancy. METHODOLOGY AND PRINCIPAL FINDINGS: We undertook a health facility-based prospective observational study in pregnant women from Guatemala (GT), Colombia (CO), Brazil (BR), India (IN) and Papua New Guinea PNG). Malaria and anemia were determined during pregnancy and fetal outcomes assessed at delivery...
June 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28604779/lys48-ubiquitination-during-the-intraerythrocytic-cycle-of-the-rodent-malaria-parasite-plasmodium-chabaudi
#5
Lorena González-López, Rebeca Carballar-Lejarazú, Gerardo Arrevillaga Boni, Leticia Cortés-Martínez, Febe Elena Cázares-Raga, Abel Trujillo-Ocampo, Mario H Rodríguez, Anthony A James, Fidel de la Cruz Hernández-Hernández
Ubiquitination tags proteins for different functions within the cell. One of the most abundant and studied ubiquitin modification is the Lys48 polyubiquitin chain that modifies proteins for their destruction by proteasome. In Plasmodium is proposed that post-translational regulation is fundamental for parasite development during its complex life-cycle; thus, the objective of this work was to analyze the ubiquitination during Plasmodium chabaudi intraerythrocytic stages. Ubiquitinated proteins were detected during intraerythrocytic stages of Plasmodium chabaudi by immunofluorescent microscopy, bidimensional electrophoresis (2-DE) combined with immunoblotting and mass spectrometry...
2017: PloS One
https://www.readbyqxmd.com/read/28603136/report-unsupervised-identification-of-malaria-parasites-using-computer-vision
#6
Najeed Ahmed Khan, Hassan Pervaz, Arsalan Latif, Ayesha Musharaff
Malaria in human is a serious and fatal tropical disease. This disease results from Anopheles mosquitoes that are infected by Plasmodium species. The clinical diagnosis of malaria based on the history, symptoms and clinical findings must always be confirmed by laboratory diagnosis. Laboratory diagnosis of malaria involves identification of malaria parasite or its antigen / products in the blood of the patient. Manual diagnosis of malaria parasite by the pathologists has proven to become cumbersome. Therefore, there is a need of automatic, efficient and accurate identification of malaria parasite...
January 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28591198/single-dose-primaquine-to-reduce-gametocyte-carriage-and-plasmodium-falciparum-transmission-in-cambodia-an-open-label-randomized-trial
#7
Jessica T Lin, Chanthap Lon, Michele D Spring, Somethy Sok, Soklyda Chann, Mali Ittiverakul, Worachet Kuntawunginn, Mok My, Kheangheng Thay, Rifat Rahman, Sujata Balasubramanian, Mengchuor Char, Charlotte A Lanteri, Panita Gosi, Ratawan Ubalee, Steven R Meshnick, David L Saunders
BACKGROUND: Single low dose primaquine (SLD PQ, 0.25mg/kg) is recommended in combination with artemisinin-based combination therapy (ACT) as a gametocytocide to prevent Plasmodium falciparum transmission in areas threatened by artemisinin resistance. To date, no randomized controlled trials have measured primaquine's effect on infectiousness to Anopheline mosquitoes in Southeast Asia. METHODS: Cambodian adults with uncomplicated falciparum malaria were randomized to receive a single 45mg dose of primaquine (equivalent to three SLD PQ) or no primaquine after the third dose of dihydroartemisin-piperaquine (DHP) therapy...
2017: PloS One
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
#8
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/28579627/carriage-of-sub-microscopic-sexual-and-asexual-plasmodium-falciparum-stages-in-the-dry-season-at-navrongo-ghana
#9
Geoffrey R Atelu, Nancy O Duah, Michael D Wilson
BACKGROUND: We investigated the prevalence of sub-microscopic Plasmodium falciparum infections and gametocyte carriage in asymptomatic individuals in Navrongo in northern Ghana, an area of seasonal malaria transmission. DESIGN: A cross sectional study of 209 randomly selected participants of all age-groups was conducted in February and March, 2015. METHODS: Capillary blood samples collected from these individuals were used for the detection of both asexual and gametocyte stage parasites by microscopy, reverse transcriptase polymerase chain reaction (RT-PCR) and conventional nested PCR methods...
December 2016: Ghana Medical Journal
https://www.readbyqxmd.com/read/28560696/impact-of-the-charge-ratio-on-the-in-vivo-immunogenicity-of-lipoplexes
#10
Zahra Heidari, Jaspreet S Arora, Dibyadyuti Datta, Vijay T John, Nirbhay Kumar, Geetha P Bansal
PURPOSE: The present study investigated the immunogenic potential of different cationic liposome formulations with a DNA plasmid encoding Pfs25, a malaria transmission-blocking vaccine candidate. METHODS: Pfs25 plasmid DNA was complexed with cationic liposomes to produce lipoplexes at different charge ratios of the cationic lipid head group to the nucleotide phosphate (N:P). The formation of lipoplexes was visualized by Cryogenic-TEM. Confocal microscopy of lipoplexes formed with GFP encoding plasmid DNA, and flow cytometry was used to determine their in vitro transfection capability...
May 30, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28558710/a-metabolomic-analytical-approach-permits-identification-of-urinary-biomarkers-for-plasmodium-falciparum-infection-a-case-control-study
#11
Salah Abdelrazig, Catharine A Ortori, Gail Davey, Wakgari Deressa, Dhaba Mulleta, David A Barrett, Alemayehu Amberbir, Andrew W Fogarty
BACKGROUND: Currently available diagnostic techniques of Plasmodium falciparum infection are not optimal for non-invasive, population-based screening for malaria. It was hypothesized that a mass spectrometry-based metabolomics approach could identify urinary biomarkers of falciparum malaria. METHODS: The study used a case-control design, with cases consisting of 21 adults in central Ethiopia with a diagnosis of P. falciparum infection confirmed with microscopy, and 25 controls of adults with negative blood smears for malaria matched on age and sex...
May 30, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28545583/private-sector-role-readiness-and-performance-for-malaria-case-management-in-uganda-2015
#12
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/28545579/evaluation-of-a-laboratory-quality-assurance-pilot-programme-for-malaria-diagnostics-in-low-transmission-areas-of-kenya-2013
#13
Elizabeth Wanja, Rachel Achilla, Peter Obare, Rose Adeny, Caroline Moseti, Victor Otieno, Collins Morang'a, Ephantus Murigi, John Nyamuni, Derek R Monthei, Bernhards Ogutu, Ann M Buff
BACKGROUND: One objective of the Kenya National Malaria Strategy 2009-2017 is scaling access to prompt diagnosis and effective treatment. In 2013, a quality assurance (QA) pilot was implemented to improve accuracy of malaria diagnostics at selected health facilities in low-transmission counties of Kenya. Trends in malaria diagnostic and QA indicator performance during the pilot are described. METHODS: From June to December 2013, 28 QA officers provided on-the-job training and mentoring for malaria microscopy, malaria rapid diagnostic tests and laboratory QA/quality control (QC) practices over four 1-day visits at 83 health facilities...
May 25, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28545457/malaria-prevalence-in-asymptomatic-and-symptomatic-children-in-kiwangwa-bagamoyo-district-tanzania
#14
Deborah Sumari, Felista Mwingira, Majige Selemani, Joseph Mugasa, Kefas Mugittu, Paul Gwakisa
BACKGROUND: Malaria prevalence continues to decline across sub-Saharan Africa as a result of various intervention strategies. However, the diseases still poses a public health concern in the region. While symptomatic malaria is recognized and treated, asymptomatic infections become increasingly important for interrupting transmission. A cross-sectional survey was conducted to assess malaria prevalence in symptomatic and asymptomatic children in Kiwangwa ward in Bagamoyo District in Tanzania...
May 25, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28535793/intermittent-preventive-treatment-for-malaria-among-children-in-a-refugee-camp-in-northern-uganda-lessons-learned
#15
Matthew E Coldiron, Estrella Lasry, Malika Bouhenia, Debashish Das, Peter Okui, Dan Nyehangane, Juliet Mwanga, Celine Langendorf, Greg Elder, Léon Salumu, Rebecca F Grais
Northern Uganda hosts a large population of refugees from South Sudan, and malaria is one of the major health problems in the area. In 2015, intermittent preventive treatment for malaria (IPTc) was implemented in two refugee camps among children aged 6 months to 14 years. Three distributions of dihydroartemisinin-piperaquine (DP) were conducted at 8-week intervals. The first dose was directly administered at IPTc distribution sites and the second and third doses were given to caregivers to administer at home...
May 23, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28527688/clinical-development-of-a-var2csa-based-placental-malaria-vaccine-pamvac-quantifying-vaccine-antigen-specific-memory-b-t-cell-activity-in-beninese-primigravidae
#16
Komi Gbédandé, Nadine Fievet, Firmine Viwami, Sem Ezinmegnon, Saadou Issifou, Jean-Philippe Chippaux, Yannelle Dossou, Kabirou Moutairou, Achille Massougbodji, Nicaise Ndam, Willem Adriaan de Jongh, T Max M Søgaard, Ali Salanti, Morten A Nielsen, Meral Esen, Benjamin Mordmüller, Philippe Deloron, Adrian J F Luty
BACKGROUND: The antigen VAR2CSA plays a pivotal role in the pathophysiology of pregnancy-associated malaria (PAM) caused by Plasmodium falciparum. A VAR2CSA-based vaccine candidate, PAMVAC, is under development by an EU-funded multi-country consortium (PlacMalVac project). As part of PAMVAC's clinical development, we quantified naturally acquired vaccine antigen-specific memory B and T cell responses in Beninese primigravidae recruited at the beginning of pregnancy and followed up to delivery and beyond...
May 17, 2017: Vaccine
https://www.readbyqxmd.com/read/28526075/testing-times-trends-in-availability-price-and-market-share-of-malaria-diagnostics-in-the-public-and-private-healthcare-sector-across-eight-sub-saharan-african-countries-from-2009-to-2015
#17
Kara Hanson, Catherine Goodman
BACKGROUND: The World Health Organization guidelines have recommended that all cases of suspected malaria should receive a confirmatory test with microscopy or a malaria rapid diagnostic test (RDT), however evidence from sub-Saharan Africa (SSA) illustrates that only one-third of children under five with a recent fever received a test. The aim of this study was to evaluate availability, price and market share of microscopy and RDT from 2009/11 to 2014/15 in 8 SSA countries, to better understand barriers to improving access to malaria confirmatory testing in the public and private health sectors...
May 19, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28522856/diagnosing-congenital-malaria-in-a-high-transmission-setting-clinical-relevance-and-usefulness-of-p-falciparum-hrp2-based-testing
#18
Hamtandi Magloire Natama, Delwendé Florence Ouedraogo, Hermann Sorgho, Eduard Rovira-Vallbona, Elisa Serra-Casas, M Athanase Somé, Maminata Coulibaly-Traoré, Petra F Mens, Luc Kestens, Halidou Tinto, Anna Rosanas-Urgell
Congenital malaria diagnosis is challenging due to frequently observed low parasite density infections, while their clinical relevance during early infancy is not well characterized. In Nanoro health district (Burkina Faso), we determined the prevalence of congenital malaria by real-time quantitative PCR and we assessed the performance of rapid diagnosis test (RDT) and light microscopy (LM) to detect Plasmodium falciparum infections in cord-blood samples. In addition, we examined the usefulness of P. falciparum Histidine Rich Protein2 (PfHRP2) as surrogate biomarker of infection and explored association between congenital malaria and clinical outcomes...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28521811/the-malaria-testing-and-treatment-landscape-in-mainland-tanzania-2016
#19
Daniel Michael, Sigsbert Patila Mkunde
BACKGROUND: Understanding the key characteristics of malaria testing and treatment is essential to the control of a disease that continues to pose a major risk of morbidity and mortality in mainland Tanzania, with evidence of a resurgence of the disease in recent years. The introduction of artemisinin combination therapy (ACT) as the first-line treatment for malaria, alongside policies to promote rational case management following testing, highlights the need for evidence of anti-malarial and testing markets in the country...
April 24, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28520724/development-of-a-movement-based-in-vitro-screening-assay-for-the-identification-of-new-anti-cestodal-compounds
#20
Dominic Ritler, Reto Rufener, Heinz Sager, Jacques Bouvier, Andrew Hemphill, Britta Lundström-Stadelmann
Intestinal cestodes are infecting millions of people and livestock worldwide, but treatment is mainly based on one drug: praziquantel. The identification of new anti-cestodal compounds is hampered by the lack of suitable screening assays. It is difficult, or even impossible, to evaluate drugs against adult cestodes in vitro due to the fact that these parasites cannot be cultured in microwell plates, and adult and larval stages in most cases represent different organisms in terms of size, morphology, and metabolic requirements...
May 2017: PLoS Neglected Tropical Diseases
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