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https://www.readbyqxmd.com/read/27910908/larval-diet-affects-mosquito-development-and-permissiveness-to-plasmodium-infection
#1
Inbar Linenberg, George K Christophides, Mathilde Gendrin
The larval stages of malaria vector mosquitoes develop in water pools, feeding mostly on microorganisms and environmental detritus. Richness in the nutrient supply to larvae influences the development and metabolism of larvae and adults. Here, we investigated the effects of larval diet on the development, microbiota content and permissiveness to Plasmodium of Anopheles coluzzii. We tested three fish diets often used to rear mosquitoes in the laboratory, including two pelleted diets, Dr. Clarke's Pool Pellets and Nishikoi Fish Pellets, and one flaked diet, Tetramin Fish-Flakes...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27908622/biomonitoring-of-persistent-organic-pollutants-pops-in-child-populations-living-near-contaminated-sites-in-mexico
#2
R Flores-Ramírez, F J Pérez-Vázquez, M Rodríguez-Aguilar, S E Medellín-Garibay, E Van Brussel, A C Cubillas-Tejeda, L Carrizales-Yáñez, F Díaz-Barriga
The aim of this study was to conduct a POP biomonitoring programme for children in high-risk areas. We evaluated 247 serum samples from children between the ages of 6 and 12years old from two zones in Mexico: (1) indigenous zones, which included Cuatlamayan (CUA), Tocoy (TOC), and Santa Maria Picula (SAM); and (2) industrial zones, which included Tercera Chica (TC), Industrial San Luis (IND) and Rincon de San Jose (SJR); Mundo Nuevo (MN); and Alpuyeca (ALP). Our results showed that α-endosulfan was similar to CUA, TOC, SAM, TC and MN (178...
November 28, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27908227/improved-infant-hemoglobin-hb-and-blood-glucose-concentrations-the-beneficial-effect-of-maternal-vitamin-a-supplementation-of-malaria-infected-mothers-in-ebonyi-state-nigeria
#3
Michael O Elom, Joseph E Eyo, Fabian C Okafor, Amos Nworie, Victor U Usanga, Gerald N Attamah, Chibueze C Igwe
One hundred and fifty-two malaria-infected pregnant women whose pregnancies had advanced to the 6th month were randomised into two study groups - supplemented and placebo groups, after obtaining their approved consents. Ten thousand international units of vitamin A soft gels were administered to the supplemented group three times per week. Vitamin A soft gels devoid of their active ingredients were administered thrice weekly to the placebo group. Two hundred thousand international units of vitamin A was administered to the supplemented groups within 8 weeks postpartum...
December 1, 2016: Pathogens and Global Health
https://www.readbyqxmd.com/read/27907215/cd8-t-cells-induce-fatal-brainstem-pathology-during-cerebral-malaria-via-luminal-antigen-specific-engagement-of-brain-vasculature
#4
Phillip A Swanson, Geoffrey T Hart, Matthew V Russo, Debasis Nayak, Takele Yazew, Mirna Peña, Shahid M Khan, Chris J Janse, Susan K Pierce, Dorian B McGavern
Cerebral malaria (CM) is a severe complication of Plasmodium falciparum infection that results in thousands of deaths each year, mostly in African children. The in vivo mechanisms underlying this fatal condition are not entirely understood. Using the animal model of experimental cerebral malaria (ECM), we sought mechanistic insights into the pathogenesis of CM. Fatal disease was associated with alterations in tight junction proteins, vascular breakdown in the meninges / parenchyma, edema, and ultimately neuronal cell death in the brainstem, which is consistent with cerebral herniation as a cause of death...
December 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27907019/the-effects-of-transdermally-delivered-oleanolic-acid-on-malaria-parasites-and-blood-glucose-homeostasis-in-p-berghei-infected-male-sprague-dawley-rats
#5
Happiness P Sibiya, Musa V Mabandla, Cephas T Musabayane
The present study investigated the effects of transdermally delivered oleanolic acid (OA) monotherapy and in combination with chloroquine (CHQ) on malaria parasites and glucose homeostasis of P. berghei-infected male Sprague-Dawley rats. Oral glucose test (OGT) responses to OA-pectin patch and CHQ-OA combination matrix patch were monitored in non-infected and infected rats. To evaluate the short-term effects of treatment, percentage parasitaemia, blood glucose, glycogen and plasma insulin were monitored in separate groups of animals treated with either OA-patch monotherapy or CHQ-OA combination pectin patch over a 21-days period...
2016: PloS One
https://www.readbyqxmd.com/read/27907013/development-and-implementation-of-the-ebola-traveler-monitoring-program-and-clinical-outcomes-of-monitored-travelers-during-october-may-2015-minnesota
#6
Aaron DeVries, Pamela Talley, Kristin Sweet, Susan Kline, Patricia Stinchfield, Pritish Tosh, Richard Danila
BACKGROUND: In October 2014, the United States began actively monitoring all persons who had traveled from Guinea, Liberia, and Sierra Leone in the previous 21 days. State public health departments were responsible for monitoring all travelers; Minnesota has the largest Liberian population in the United States. The MDH Ebola Clinical Team (ECT) was established to assess travelers with symptoms of concern for Ebola virus disease (EVD), coordinate access to healthcare at appropriate facilities including Ebola Assessment and Treatment Units (EATU), and provide guidance to clinicians...
2016: PloS One
https://www.readbyqxmd.com/read/27906962/population-density-climate-variables-and-poverty-synergistically-structure-spatial-risk-in-urban-malaria-in-india
#7
Mauricio Santos-Vega, Menno J Bouma, Vijay Kohli, Mercedes Pascual
BACKGROUND: The world is rapidly becoming urban with the global population living in cities projected to double by 2050. This increase in urbanization poses new challenges for the spread and control of communicable diseases such as malaria. In particular, urban environments create highly heterogeneous socio-economic and environmental conditions that can affect the transmission of vector-borne diseases dependent on human water storage and waste water management. Interestingly India, as opposed to Africa, harbors a mosquito vector, Anopheles stephensi, which thrives in the man-made environments of cities and acts as the vector for both Plasmodium vivax and Plasmodium falciparum, making the malaria problem a truly urban phenomenon...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27906127/malaria-parasite-celtos-targets-the-inner-leaflet-of-cell-membranes-for-pore-dependent-disruption
#8
John R Jimah, Nichole D Salinas, Monica Sala-Rabanal, Nathaniel G Jones, L David Sibley, Colin G Nichols, Paul H Schlesinger, Niraj H Tolia
Apicomplexan parasites contain a conserved protein CelTOS that, in malaria parasites, is essential for traversal of cells within the mammalian host and arthropod vector. However, the molecular role of CelTOS is unknown because it lacks sequence similarity to proteins of known function. Here, we determined the crystal structure of CelTOS and discovered CelTOS resembles proteins that bind to and disrupt membranes. In contrast to known membrane disruptors, CelTOS has a distinct architecture, specifically binds phosphatidic acid commonly present within the inner leaflet of plasma membranes, and potently disrupts liposomes composed of phosphatidic acid by forming pores...
December 1, 2016: ELife
https://www.readbyqxmd.com/read/27905974/dynamic-denominators-the-impact-of-seasonally-varying-population-numbers-on-disease-incidence-estimates
#9
Elisabeth Zu Erbach-Schoenberg, Victor A Alegana, Alessandro Sorichetta, Catherine Linard, Christoper Lourenço, Nick W Ruktanonchai, Bonita Graupe, Tomas J Bird, Carla Pezzulo, Amy Wesolowski, Andrew J Tatem
BACKGROUND: Reliable health metrics are crucial for accurately assessing disease burden and planning interventions. Many health indicators are measured through passive surveillance systems and are reliant on accurate estimates of denominators to transform case counts into incidence measures. These denominator estimates generally come from national censuses and use large area growth rates to estimate annual changes. Typically, they do not account for any seasonal fluctuations and thus assume a static denominator population...
October 12, 2016: Population Health Metrics
https://www.readbyqxmd.com/read/27905971/trends-causes-and-risk-factors-of-mortality-among-children-under-5-in-ethiopia-1990-2013-findings-from-the-global-burden-of-disease-study-2013
#10
Amare Deribew, Gizachew Assefa Tessema, Kebede Deribe, Yohannes Adama Melaku, Yihunie Lakew, Azmeraw T Amare, Semaw F Abera, Mesoud Mohammed, Abiy Hiruye, Efrem Teklay, Awoke Misganaw, Nicholas Kassebaum
BACKGROUND: Ethiopia has made remarkable progress in reducing child mortality over the last two decades. However, the under-5 mortality rate in Ethiopia is still higher than the under-5 mortality rates of several low- and middle-income countries (LMIC). On the other hand, the patterns and causes of child mortality have not been well investigated in Ethiopia. The objective of this study was to investigate the mortality trend, causes of death, and risk factors among children under 5 in Ethiopia during 1990-2013...
November 14, 2016: Population Health Metrics
https://www.readbyqxmd.com/read/27905939/causes-of-death-in-vanuatu
#11
Karen Carter, Viran Tovu, Jeffrey Tila Langati, Michael Buttsworth, Lester Dingley, Andy Calo, Griffith Harrison, Chalapati Rao, Alan D Lopez, Richard Taylor
BACKGROUND: The population of the Pacific Melanesian country of Vanuatu was 234,000 at the 2009 census. Apart from subsistence activities, economic activity includes tourism and agriculture. Current completeness of vital registration is considered too low to be usable for national statistics; mortality and life expectancy (LE) are derived from indirect demographic estimates from censuses/surveys. Some cause of death (CoD) data are available to provide information on major causes of premature death...
March 15, 2016: Population Health Metrics
https://www.readbyqxmd.com/read/27905928/perceptions-on-the-effect-of-small-electric-fans-on-comfort-inside-bed-nets-in-southern-ghana-a-qualitative-study
#12
Mulako S Jaeger, Olivier J T Briët, Joseph Keating, Collins K Ahorlu, Joshua O Yukich, Samuel Oppong, Peter Nardini, Constanze Pfeiffer
BACKGROUND: Long-lasting insecticidal nets (LLINs) are known to be highly effective in reducing malaria transmission, morbidity and mortality. However, among those owning an LLIN, use rates are often suboptimal. A reported barrier to bed net use is discomfort due to heat. This qualitative study was part of a larger evaluation conducted in communities without electricity in rural Ghana to assess whether 0.8 W solar powered net fans can increase net use. METHODS: Twenty-three key informant interviews with household heads in the study communities in Shai-Osudoku District, southern Ghana, were conducted from July to August 2015...
December 1, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27905921/systematic-review-of-the-role-of-angiopoietin-1-and-angiopoietin-2-in-plasmodium-species-infections-biomarkers-or-therapeutic-targets
#13
Gerdie M de Jong, Jasper J Slager, Annelies Verbon, Jaap J van Hellemond, Perry J J van Genderen
BACKGROUND: Levels of both angiopoietin-1 (Ang-1) and angiopoietin-2 (Ang-2) correlate with malaria disease severity and are proposed as biomarkers and possible therapeutic targets. To establish their role in malaria, a systematic review was performed of the literature on Ang-1 and Ang-2 with regard to their potential as biomarkers in malaria and discuss their possible place in adjuvant treatment regimens. METHODS: Ten electronic databases were systematically searched to identify studies investigating Ang-1 and Ang-2 in human and murine malaria in both clinical and experimental settings...
December 1, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27905919/susceptibility-of-anopheles-gambiae-to-insecticides-used-for-malaria-vector-control-in-rwanda
#14
Emmanuel Hakizimana, Corine Karema, Dunia Munyakanage, Gad Iranzi, John Githure, Jon Eric Tongren, Willem Takken, Agnes Binagwaho, Constantianus J M Koenraadt
BACKGROUND: The widespread emergence of resistance to pyrethroids is a major threat to the gains made in malaria control. To monitor the presence and possible emergence of resistance against a variety of insecticides used for malaria control in Rwanda, nationwide insecticide resistance surveys were conducted in 2011 and 2013. METHODS: Larvae of Anopheles gambiae sensu lato mosquitoes were collected in 12 sentinel sites throughout Rwanda. These were reared to adults and analysed for knock-down and mortality using WHO insecticide test papers with standard diagnostic doses of the recommended insecticides...
December 1, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27905873/comparative-genomics-of-beauveria-bassiana-uncovering-signatures-of-virulence-against-mosquitoes
#15
Claudio A Valero-Jiménez, Luigi Faino, Daphne Spring In't Veld, Sandra Smit, Bas J Zwaan, Jan A L van Kan
BACKGROUND: Entomopathogenic fungi such as Beauveria bassiana are promising biological agents for control of malaria mosquitoes. Indeed, infection with B. bassiana reduces the lifespan of mosquitoes in the laboratory and in the field. Natural isolates of B. bassiana show up to 10-fold differences in virulence between the most and the least virulent isolate. In this study, we sequenced the genomes of five isolates representing the extremes of low/high virulence and three RNA libraries, and applied a genome comparison approach to uncover genetic mechanisms underpinning virulence...
December 1, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27905633/-failure-to-radical-cure-in-plasmodium-vivax-malaria
#16
Julián García, Agustín Seijo, Andrés Benchetrit, Esteban Couto, Sofía Echazarreta, Susana Lloveras, Tomás Orduna
Relapsing Plasmodium vivax malaria is due to activation of dormant intrahepatic parasitic forms known as hypnozoits. Primaquine is the only available drug effective against hypnozoits and, alongside a schizonticidal drug, constitutes the radical treatment of malaria. Failure of radical treatment is frequently attributed to inadequate dosing, poor adherence, or reinfection. However, several cases of radical treatment failure without these factors have been reported, inferring that metabolic properties of the host or tolerance mechanisms of the parasite may be implied...
August 2016: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/27905280/diagnosis-and-species-discrimination-of-positive-malaria-samples-by-real-time-polymerase-chain-reaction
#17
Esra Atalay Şahar, Muhammet Karakavuk, Hüseyin Can, Şebnem Nergiz, Kadri Gül, Aysu Değirmenci Döşkaya, Yüksel Gürüz, Mert Döşkaya
OBJECTIVE: Malaria is an important tropical disease that is detected in 198 million people and causes 367-755 thousand deaths annually. Recently, the real-time Polymerase Chain Reaction (PCR) technique has enabled quick determination of Plasmodium spp. and species identification in the same assay with a low contamination risk. In the present study, we aimed to use real-time PCR targeting the 18S rRNA gene to diagnose Plasmodium spp. and perform species identification. METHODS: DNA samples of 15 patients with malaria (14 caused by P...
September 2016: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/27903741/whole-killed-blood-stage-vaccine-induced-immunity-suppresses-the-development-of-malaria-parasites-in-mosquitoes
#18
Feng Zhu, Taiping Liu, Chenhao Zhao, Xiao Lu, Jian Zhang, Wenyue Xu
As a malaria transmission-blocking vaccine alone does not confer a direct benefit to the recipient, it is necessary to develop a vaccine that not only blocks malaria transmission but also protects vaccinated individuals. In this study we observed that a whole-killed blood-stage vaccine (WKV) not only conferred protection against the blood-stage challenge but also markedly inhibited the transmission of different strains of the malaria parasite. Although the parasitemia is much lower in WKV-immunized mice challenged with malaria parasites, the gametocytemia is comparable between control and immunized mice during the early stages of infection...
November 30, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27903593/respiratory-syncytial-virus-infection-detection-and-new-options-for-prevention-and-treatment
#19
REVIEW
Cameron Griffiths, Steven J Drews, David J Marchant
Respiratory syncytial virus (RSV) infection is a significant cause of hospitalization of children in North America and one of the leading causes of death of infants less than 1 year of age worldwide, second only to malaria. Despite its global impact on human health, there are relatively few therapeutic options available to prevent or treat RSV infection. Paradoxically, there is a very large volume of information that is constantly being refined on RSV replication, the mechanisms of RSV-induced pathology, and community transmission...
January 2017: Clinical Microbiology Reviews
https://www.readbyqxmd.com/read/27903308/joint-spatial-time-series-epidemiological-analysis-of-malaria-and-cutaneous-leishmaniasis-infection
#20
O A Adegboye, M Al-Saghir, D H Y Leung
Malaria and leishmaniasis are among the two most important health problems of many developing countries especially in the Middle East and North Africa. It is common for vector-borne infectious diseases to have similar hotspots which may be attributed to the overlapping ecological distribution of the vector. Hotspot analyses were conducted to simultaneously detect the location of local hotspots and test their statistical significance. Spatial scan statistics were used to detect and test hotspots of malaria and cutaneous leishmaniasis (CL) in Afghanistan in 2009...
December 1, 2016: Epidemiology and Infection
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