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Malaria Journal

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https://www.readbyqxmd.com/read/28314384/erratum-to-pre-travel-malaria-chemoprophylaxis-counselling-in-a-public-travel-medicine-clinic-in-s%C3%A3-o-paulo-brazil
#1
Tânia do Socorro Souza Chaves, Wuelton Marcelo Monteiro, Jessé Reis Alves, Marcus Lacerda, Marta Heloisa Lopes
No abstract text is available yet for this article.
March 17, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28302168/comparison-of-the-diagnostic-performance-of-microscopic-examination-with-nested-polymerase-chain-reaction-for-optimum-malaria-diagnosis-in-upper-myanmar
#2
Jung-Mi Kang, Pyo-Yun Cho, Mya Moe, Jinyoung Lee, Hojong Jun, Hyeong-Woo Lee, Seong Kyu Ahn, Tae Im Kim, Jhang Ho Pak, Moe Kyaw Myint, Khin Lin, Tong-Soo Kim, Byoung-Kuk Na
BACKGROUND: Accurate diagnosis of Plasmodium infection is crucial for prompt malaria treatment and surveillance. Microscopic examination has been widely applied as the gold standard for malaria diagnosis in most part of malaria endemic areas, but its diagnostic value has been questioned, particularly in submicroscopic malaria. In this study, the diagnostic performance of microscopic examination and nested polymerase chain reaction (PCR) was evaluated to establish optimal malaria diagnosis method in Myanmar...
March 16, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28302108/confirmation-of-plasmodium-falciparum-in-vitro-resistance-to-monodesethylamodiaquine-and-chloroquine-in-dakar-senegal-in-2015
#3
Silman Diawara, Marylin Madamet, Mame Bou Kounta, Gora Lo, Khalifa Ababacar Wade, Aminata Nakoulima, Raymond Bercion, Rémy Amalvict, Mamadou Wague Gueye, Bécaye Fall, Bakary Diatta, Bruno Pradines
BACKGROUND: In response to increasing resistance to anti-malarial drugs, Senegal adopted artemisinin-based combination therapy (ACT) as the first-line treatment for uncomplicated malaria in 2006. However, resistance of Plasmodium falciparum parasites to artemisinin derivatives, characterized by delayed parasite clearance after treatment with ACT or artesunate monotherapy, has recently emerged and rapidly spread in Southeast Asia. After 10 years of stability with rates ranging from 5.6 to 11...
March 16, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28298235/clinical-and-molecular-surveillance-of-drug-resistant-vivax-malaria-in-myanmar-2009-2016
#4
Myat Htut Nyunt, Jin-Hee Han, Bo Wang, Khin Myo Aye, Kyin Hla Aye, Seong-Kyun Lee, Ye Htut, Myat Phone Kyaw, Kay Thwe Han, Eun-Taek Han
BACKGROUND: One of the major challenges for control and elimination of malaria is ongoing spread and emergence of drug resistance. While epidemiology and surveillance of the drug resistance in falciparum malaria is being explored globally, there are few studies on drug resistance vivax malaria. METHODS: To assess the spread of drug-resistant vivax malaria in Myanmar, a multisite, prospective, longitudinal study with retrospective analysis of previous therapeutic efficacy studies, was conducted...
March 16, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28288644/tollip-gene-variant-is-associated-with-plasmodium-vivax-malaria-in-the-brazilian-amazon
#5
Larissa W Brasil, Laila R A Barbosa, Felipe J de Araujo, Allyson G da Costa, Luan D O da Silva, Suzana K Pinheiro, Anne C G de Almeida, Andrea Kuhn, Sheila Vitor-Silva, Gisely C de Melo, Wuelton M Monteiro, Marcus V G de Lacerda, Rajendranath Ramasawmy
BACKGROUND: Toll-interacting protein is a negative regulator in the TLR signaling cascade, particularly by impeding the TLR2 and, TLR4 pathway. Recently, TOLLIP was shown to regulate human TLR signaling pathways. Two common TOLLIP polymorphisms (rs5743899 and rs3750920) were reported to be influencing IL-6, TNF and IL-10 expression. In this study, TOLLIP variants were investigated to their relation to Plasmodium vivax malaria in the Brazilian Amazon. METHODS: This cohort study was performed in the municipalities of Careiro and, Manaus, in Western Brazilian Amazon...
March 13, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28288642/combining-indoor-and-outdoor-methods-for-controlling-malaria-vectors-an-ecological-model-of-endectocide-treated-livestock-and-insecticidal-bed-nets
#6
REVIEW
Laith Yakob, Mary Cameron, Jo Lines
BACKGROUND: Malaria is spread by mosquitoes that are increasingly recognised to have diverse biting behaviours. How a mosquito in a specific environment responds to differing availability of blood-host species is largely unknown and yet critical to vector control efficacy. A parsimonious mathematical model is proposed that accounts for a diverse range of host-biting behaviours and assesses their impact on combining long-lasting insecticidal nets (LLINs) with a novel approach to malaria control: livestock treated with insecticidal compounds ('endectocides') that kill biting mosquitoes...
March 13, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28288639/rhesus-macaque-and-mouse-models-for-down-selecting-circumsporozoite-protein-based-malaria-vaccines-differ-significantly-in-immunogenicity-and-functional-outcomes
#7
Timothy W Phares, Anthony D May, Christopher J Genito, Nathan A Hoyt, Farhat A Khan, Michael D Porter, Margot DeBot, Norman C Waters, Philippe Saudan, Sheetij Dutta
BACKGROUND: Non-human primates, such as the rhesus macaques, are the preferred model for down-selecting human malaria vaccine formulations, but the rhesus model is expensive and does not allow for direct efficacy testing of human malaria vaccines. Transgenic rodent parasites expressing genes of human Plasmodium are now routinely used for efficacy studies of human malaria vaccines. Mice have however rarely predicted success in human malaria trials and there is scepticism whether mouse studies alone are sufficient to move a vaccine candidate into the clinic...
March 13, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28288632/unexpected-selections-of-plasmodium-falciparum-polymorphisms-in-previously-treatment-na%C3%A3-ve-areas-after-monthly-presumptive-administration-of-three-different-anti-malarial-drugs-in-liberia-1976-78
#8
Irina T Jovel, Anders Björkman, Cally Roper, Andreas Mårtensson, Johan Ursing
BACKGROUND: To assess the effect on malaria prevalence, village specific monthly administrations of pyrimethamine, chlorproguanil, chloroquine or placebo were given to children in four previously treatment-naïve Liberian villages, 1976-78. Plasmodium falciparum in vivo resistance developed to pyrimethamine only. Selection of molecular markers of P. falciparum resistance after 2 years of treatment are reported. METHODS: Blood samples were collected from 191 study children in a survey in 1978...
March 13, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28284211/a-systematic-review-of-the-clinical-presentation-treatment-and-relapse-characteristics-of-human-plasmodium-ovale-malaria
#9
REVIEW
Mirjam Groger, Hannah S Fischer, Luzia Veletzky, Albert Lalremruata, Michael Ramharter
BACKGROUND: Despite increased efforts to control and ultimately eradicate human malaria, Plasmodium ovale malaria is for the most part outside the focus of research or public health programmes. Importantly, the understanding of P. ovale-nowadays regarded as the two distinct species P. ovale wallikeri and P. ovale curtisi-largely stems from case reports and case series lacking study designs providing high quality evidence. Consecutively, there is a lack of systematic evaluation of the clinical presentation, appropriate treatment and relapse characteristics of P...
March 11, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28283033/resting-and-feeding-preferences-of-anopheles-stephensi-in-an-urban-setting-perennial-for-malaria
#10
Shalu Thomas, Sangamithra Ravishankaran, N A Johnson Amala Justin, Aswin Asokan, Manu Thomas Mathai, Neena Valecha, Jacqui Montgomery, Matthew B Thomas, Alex Eapen
BACKGROUND: The Indian city of Chennai is endemic for malaria and the known local malaria vector is Anopheles stephensi. Plasmodium vivax is the predominant malaria parasite species, though Plasmodium falciparum is present at low levels. The urban ecotype of malaria prevails in Chennai with perennial transmission despite vector surveillance by the Urban Malaria Scheme (UMS) of the National Vector Borne Disease Control Programme (NVBDCP). Understanding the feeding and resting preferences, together with the transmission potential of adult vectors in the area is essential in effective planning and execution of improved vector control measures...
March 10, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28279180/primaquine-thiazolidinones-block-malaria-transmission-and-development-of-the-liver-exoerythrocytic-forms
#11
Anna Caroline C Aguiar, Flávio Jr B Figueiredo, Patrícia D Neuenfeldt, Tony H Katsuragawa, Bruna B Drawanz, Wilson Cunico, Photini Sinnis, Fidel Zavala, Antoniana U Krettli
BACKGROUND: Primaquine is an anti-malarial used to prevent Plasmodium vivax relapses and malaria transmission. However, PQ metabolites cause haemolysis in patients deficient in the enzyme glucose-6-phosphate dehydrogenase (G6PD). Fifteen PQ-thiazolidinone derivatives, synthesized through one-post reactions from primaquine, arenealdehydes and mercaptoacetic acid, were evaluated in parallel in several biological assays, including ability to block malaria transmission to mosquitoes. RESULTS: All primaquine derivatives (PQ-TZs) exhibited lower cell toxicity than primaquine; none caused haemolysis to normal or G6PD-deficient human erythrocytes in vitro...
March 9, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28274262/burden-of-malaria-in-mobile-populations-in-the-greater-accra-region-ghana-a-cross-sectional-study
#12
Nouhoum Diallo, Patricia Akweongo, Ernest Maya, Moses Aikins, Bismark Sarfo
BACKGROUND: The burden of malaria in mobile populations remains poorly documented in sub-Saharan Africa. This study determined the prevalence of malaria among hawkers and long-distance truck drivers in the Greater Accra region of Ghana. METHODS: A cross-sectional design using consecutive sampling method between June and July 2016 in Accra and Tema in Ghana was used in this study. The study population was hawkers who roam and sleep in the Market Streets, and long-distance truck drivers...
March 9, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28274257/prevalence-and-determinants-of-malaria-among-children-in-zamb%C3%A3-zia-province-mozambique
#13
James G Carlucci, Meridith Blevins Peratikos, Charlotte B Cherry, Melanie L Lopez, Ann F Green, Lazaro González-Calvo, Troy D Moon
BACKGROUND: Malaria is the leading cause of death among children in Mozambique. Prevalence and factors associated with malaria are not well studied among children in rural Zambézia Province. Whether prevalence of malaria varies across diverse districts within the province is unknown. METHODS: A cross-sectional survey of female heads of household was conducted during April and May 2014, a period of peak malaria transmission. Data were collected on up to two randomly selected children aged 6-59 months per household...
March 9, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28270213/preliminary-survey-on-anopheles-species-distribution-in-botswana-shows-the-presence-of-anopheles-gambiae-and-anopheles-funestus-complexes
#14
Leabaneng Tawe, Pleasure Ramatlho, Kelebogile Waniwa, Charles W Muthoga, Ntebaleng Makate, Davis S Ntebela, Isaac K Quaye, Marco Pombi, Giacomo Maria Paganotti
BACKGROUND: Botswana is one of the four front line malaria elimination countries in Southern Africa, with malaria control activities that include routine vector control. Past and recent studies have shown that Anopheles arabiensis is the only known vector of Plasmodium parasites in the country. This report presents a preliminary evaluation on Anopheles species composition in seven districts of Botswana with some inferences on their vectorial role. RESULTS: Overall, 404 Anopheles mosquito females were collected, of which 196 were larvae collected from several breeding sites, and 208 were adults obtained from indoor pyrethrum spray catches (PSC)...
March 7, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28270152/a-systematic-review-on-malaria-sero-epidemiology-studies-in-the-brazilian-amazon-insights-into-immunological-markers-for-exposure-and-protection
#15
Pedro M Folegatti, André M Siqueira, Wuelton M Monteiro, Marcus Vinícius G Lacerda, Chris J Drakeley, Érika M Braga
BACKGROUND: Considerable success in reducing malaria incidence and mortality has been achieved in Brazil, leading to discussions over the possibility of moving towards elimination. However, more than reporting and counting clinical cases, elimination will require the use of efficient tools and strategies for measuring transmission dynamics and detecting the infectious reservoir as the primary indicators of interest for surveillance and evaluation. Because acquisition and maintenance of anti-malarial antibodies depend on parasite exposure, seroprevalence rates could be used as a reliable tool for assessing malaria endemicity and an adjunct measure for monitoring transmission in a rapid and cost-effective manner...
March 7, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28264689/rapid-diagnostic-tests-failing-to-detect-plasmodium-falciparum-infections-in-eritrea-an-investigation-of-reported-false-negative-rdt-results
#16
Araia Berhane, Mulugeta Russom, Iyassu Bahta, Filmon Hagos, Michael Ghirmai, Selam Uqubay
BACKGROUND: Relatively large number of false-negative malaria rapid diagnostic test (RDT) results for microscopically confirmed Plasmodium falciparum cases were reported from five of the six administrative regions of Eritrea in 2015. This activated the Ministry of Health to conduct an initial exploratory investigation. The main objective of the investigation was to confirm the sensitivity of the RDTs in the field in microscopically confirmed malaria cases, identify the possible causes of the failure and recommend further actions to be taken...
March 6, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28264678/passive-case-detection-of-malaria-in-ratanakiri-province-cambodia-to-detect-villages-at-higher-risk-for-malaria
#17
Somony Heng, Lies Durnez, Sokny Mao, Sovannaroth Siv, Sochantha Tho, Vanna Mean, Vincent Sluydts, Marc Coosemans
BACKGROUND: Cambodia reduced malaria incidence by more than 75% between 2000 and 2015, a target of the Millennium Development Goal 6. The Cambodian Government aims to eliminate all forms of malaria by 2025. The country's malaria incidence is highly variable at provincial level, but less is known at village level. This study used passive case detection (PCD) data at village level in Ratanakiri Province from 2010 to 2014 to describe incidence trends and identify high-risk areas of malaria to be primarily targeted towards malaria elimination...
March 6, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28259160/in-vivo-efficacy-of-top-five-surveyed-ghanaian-herbal-anti-malarial-products
#18
Dennis Wilmot, Elvis Ofori Ameyaw, Daniel Amoako-Sakyi, Johnson Nyarko Boampong, Neils Ben Quashie
BACKGROUND: Anti-malarial herbal preparations (HPs) continue to enjoy high patronage in Ghana despite reports that the artemisinin-based combination therapy (ACT), the recommended first choice for treatment of uncomplicated malaria in the country, remains efficacious. A major issue with the use of these preparations is inadequate or unreliable data on their efficacy and quality. An assessment of the potency and quality of the most popular commercial anti-malarial HPs in Ghana was, therefore, carried out...
March 4, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28259152/should-chemoprophylaxis-be-a-main-strategy-for-preventing-re-introduction-of-malaria-in-highly-receptive-areas-sri-lanka-a-case-in-point
#19
A Rajitha Wickremasinghe, Renu Wickremasinghe, Hemantha D B Herath, S Deepika Fernando
BACKGROUND: Imported malaria cases continue to be reported in Sri Lanka, which was declared 'malaria-free' by the World Health Organization in September 2016. Chemoprophylaxis, a recommended strategy for malaria prevention for visitors travelling to malaria-endemic countries from Sri Lanka is available free of charge. The strategy of providing chemoprophylaxis to visitors to a neighbouring malaria-endemic country within the perspective of a country that has successfully eliminated malaria but is highly receptive was assessed, taking Sri Lanka as a case in point...
March 4, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28253926/exo-erythrocytic-development-of-avian-malaria-and-related-haemosporidian-parasites
#20
REVIEW
Gediminas Valkiūnas, Tatjana A Iezhova
BACKGROUND: Avian malaria parasites (Plasmodium spp.) and related haemosporidians (Haemosporida) are responsible for diseases which can be severe and even lethal in avian hosts. These parasites cause not only blood pathology, but also damage various organs due to extensive exo-erythrocytic development all over the body, which is not the case during Plasmodium infections in mammals. However, exo-erythrocytic development (tissue merogony or schizogony) remains the most poorly investigated part of life cycle in all groups of wildlife haemosporidian parasites...
March 3, 2017: Malaria Journal
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