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https://www.readbyqxmd.com/read/28644900/suppression-of-chikungunya-virus-replication-and-differential-innate-responses-of-human-peripheral-blood-mononuclear-cells-during-co-infection-with-dengue-virus
#1
Mariana Ruiz Silva, José A Aguilar Briseño, Vinit Upasani, Heidi van der Ende-Metselaar, Jolanda M Smit, Izabela A Rodenhuis-Zybert
Dengue and chikungunya are viral diseases transmitted to humans by infected Aedes spp. mosquitoes. With an estimated 390 million infected people per year dengue virus (DENV) currently causes the most prevalent arboviral disease. During the last decade chikungunya virus (CHIKV) has caused large outbreaks and has expanded its territory causing millions of cases in Asia, Africa and America. The viruses share a common mosquito vector and during the acute phase cause similar flu-like symptoms that can proceed to more severe or debilitating symptoms...
June 23, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28644404/garlic-organosulfur-compounds-reduce-inflammation-and-oxidative-stress-during-dengue-virus-infection
#2
Alex Hall, Andrea Troupin, Berlin Londono-Renteria, Tonya M Colpitts
Dengue virus (DENV) is a mosquito-borne flavivirus that causes significant global human disease and mortality. One approach to develop treatments for DENV infection and the prevention of severe disease is through investigation of natural medicines. Inflammation plays both beneficial and harmful roles during DENV infection. Studies have proposed that the oxidative stress response may be one mechanism responsible for triggering inflammation during DENV infection. Thus, blocking the oxidative stress response could reduce inflammation and the development of severe disease...
June 23, 2017: Viruses
https://www.readbyqxmd.com/read/28643631/the-anopheles-gambiae-2la-chromosome-inversion-is-associated-with-susceptibility-to-plasmodium-falciparum-in-africa
#3
Michelle M Riehle, Tullu Bukhari, Awa Gneme, Wamdaogo M Guelbeogo, Boubacar Coulibaly, Abdrahamane Fofana, Adrien Pain, Emmanuel Bischoff, Francois Renaud, Abdoul H Beavogui, Sekou F Traore, N'Fale Sagnon, Kenneth D Vernick
Chromosome inversions suppress genetic recombination and establish co-adapted gene complexes, or supergenes. The 2La inversion is a widespread polymorphism in the Anopheles gambiae species complex, the major African mosquito vectors of human malaria. Here we show that alleles of the 2La inversion are associated with natural malaria infection levels in wild-captured vectors from West and East Africa. Mosquitoes carrying the more-susceptible allele (2L+(a)) are also behaviorally less likely to be found inside houses...
June 23, 2017: ELife
https://www.readbyqxmd.com/read/28642878/the-complexity-of-zoonotic-filariasis-episystem-and-its-consequences-a-multidisciplinary-view
#4
REVIEW
Fernando Simón, Javier González-Miguel, Alicia Diosdado, Paula Josefina Gómez, Rodrigo Morchón, Vladimir Kartashev
Vector-borne transmitted helminthic zoonosis affects the health and economy of both developing and developed countries. The concept of episystem includes the set of biological, environmental, and epidemiological elements of these diseases in defined geographic and temporal scales. Dirofilariasis caused by different species of the genus Dirofilaria is a disease affecting domestic and wild canines and felines and man, transmitted by different species of culicid mosquitoes. This complexity is increased because Dirofilaria species harbor intracellular symbiont Wolbachia bacteriae, which play a key role in the embryogenesis and development of dirofilariae and in the inflammatory pathology of the disease...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28641877/-update-on-cutaneous-dirofilariasis
#5
M Benzaquen, E Marmottant, P Parola, P Berbis
Dirofilariasis is a worldwide zoonotic infection that rarely affects humans and is caused by filarial nematodes of the genus Diroflaria transmitted by mosquitoes. Cutaneous dirofilariasis, due to D. repens, presents as inflammatory lesions that develop into subcutaneous nodules. These clinical symptoms may be consistent with Wells' cellulitis. Diagnosis of dirofilariasis involves demonstration of the presence of the nematode during skin biopsy and identification of the worm through macroscopic, histological and PCR analysis...
June 19, 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/28640895/the-interplay-of-climate-intervention-and-imported-cases-as-determinants-of-the-2014-dengue-outbreak-in-guangzhou
#6
Qu Cheng, Qinlong Jing, Robert C Spear, John M Marshall, Zhicong Yang, Peng Gong
Dengue is a fast spreading mosquito-borne disease that affects more than half of the population worldwide. An unprecedented outbreak happened in Guangzhou, China in 2014, which contributed 52 percent of all dengue cases that occurred in mainland China between 1990 and 2015. Our previous analysis, based on a deterministic model, concluded that the early timing of the first imported case that triggered local transmission and the excessive rainfall thereafter were the most important determinants of the large final epidemic size in 2014...
June 22, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28640344/screening-of-plant-extracts-and-fractions-on-aedes-aegypti-larvae-found-in-the-state-of-mato-grosso-do-sul-linnaeus-1762-culicidae
#7
Karla R DE Andrade Porto, Priscilla R Motti, Mami Yano, Antonia R Roel, Claudia A L Cardoso, Rosemary Matias
The constant use of chemical insecticides for Aedes aegypti control has caused resistance in the mosquito populations. Thus, the objective of this study was to analyze the larvicidal potential of extracts and fractions of plants on A. aegypti larvae. The analysis included sixty one extracts and twenty five fractions of fifty botanical species at concentrations of 0.25; 0.12; 0.06 to 0.03 mg mL-1; 4 replications and one negative control of dechlorinate water and 1% DMSO; and a positive control with rotenone...
April 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28640234/garlic-organosulfur-compounds-reduce-inflammation-and-oxidative-stress-during-dengue-virus-infection
#8
Alex Hall, Andrea Troupin, Berlin Londono-Renteria, Tonya M Colpitts
Dengue virus (DENV) is a mosquito-borne flavivirus that causes significant global human disease and mortality. One approach to develop treatments for DENV infection and the prevention of severe disease is through investigation of natural medicines. Inflammation plays both beneficial and harmful roles during DENV infection. Studies have proposed that the oxidative stress response may be one mechanism responsible for triggering inflammation during DENV infection. Thus, blocking the oxidative stress response could reduce inflammation and the development of severe disease...
June 22, 2017: Viruses
https://www.readbyqxmd.com/read/28639690/variation-in-host-preferences-of-malaria-mosquitoes-is%C3%A2-mediated-by-skin-bacterial-volatiles
#9
A O Busula, W Takken, J G DE Boer, W R Mukabana, N O Verhulst
The host preferences of the anthropophilic mosquito species in the Anopheles gambiae complex (Diptera: Culicidae) are mediated by skin bacterial volatiles. However, it is not known whether these mosquitoes respond differentially to skin bacterial volatiles from non-human host species. In this study, the responses of two malaria mosquito species in the An.  gambiae complex, Anopheles gambiae s.s. (hereafter, An. gambiae) and Anopheles arabiensis, with different host preferences, to volatiles released from skin bacteria were tested...
June 22, 2017: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/28638259/global-alert-zika-virus-an-emerging-arbovirus
#10
REVIEW
Zulal Ozkurt, Esra Cinar Tanriverdi
Zika virus (ZIKV) is an arbovirus of the Flavivirus genus, and it has an envelope and a single RNA molecule. In early 2016, the World Health Organization declared ZIKV infection to be an emerging global health threat. The major transmission route of the virus to humans is Aedes mosquitoes. ZIKV can be transmitted between humans by transplacental, perinatal, and sexual routes and via blood and body fluids. ZIKV infection usually results in a mild and self-limiting disease with low-grade fever, conjunctivitis, and periorbital edema...
June 2017: Eurasian Journal of Medicine
https://www.readbyqxmd.com/read/28637756/high-resolution-meta-transcriptomics-reveals-the-ecological-dynamics-of-mosquito-associated-rna-viruses-in-western-australia
#11
Mang Shi, Peter Neville, Jay Nicholson, John-Sebastian Eden, Allison Imrie, Edward C Holmes
Mosquitoes harbour a high diversity of RNA viruses, including many that impact human health. Despite a growing effort to describe the extent and nature of the mosquito virome, little is known about how these viruses persist, spread, and interact with both their hosts and other microbes. To address this issue we performed a meta-transcriptomics analysis of 12 Western Australian mosquito populations structured by species and geographic location. Our results identified the complete genomes of 24 species of RNA viruses from a diverse range of viral families and orders, among which 19 are newly described...
June 21, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28637467/imported-plasmodium-falciparum-and-locally-transmitted-plasmodium-vivax-cross-border-malaria-transmission-scenario-in-northwestern-thailand
#12
Patchara Sriwichai, Stephan Karl, Yudthana Samung, Kirakorn Kiattibutr, Jeeraphat Sirichaisinthop, Ivo Mueller, Liwang Cui, Jetsumon Sattabongkot
BACKGROUND: Cross-border malaria transmission is an important problem for national malaria control programmes. The epidemiology of cross-border malaria is further complicated in areas where Plasmodium falciparum and Plasmodium vivax are both endemic. By combining passive case detection data with entomological data, a transmission scenario on the northwestern Thai-Myanmar border where P. falciparum is likely driven by importation was described, whereas P. vivax is also locally transmitted...
June 21, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28637430/malaria-control-by-commodities-without-practical-malariology
#13
J Kevin Baird
Malaria remains a serious clinical and public health problem, the object of an ongoing technological and humanitarian struggle to abate the very substantial harm done. The manner by which humanity approached malaria control changed abruptly and profoundly after 1945 with the advent of the insecticide DDT. Malariologists in the first half of the twentieth century conceived precise modifications to natural or man-made environments aimed at making those less hospitable to specific anopheline mosquito vector species...
June 21, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28636449/zika-virus-in-ontario-evaluating-a-rapid-risk-assessment-tool-for-emerging-infectious-disease-threats
#14
Ryan Van Meer, Karin Hohenadel, Alanna Fitzgerald-Husek, Bryna Warshawsky, Doug Sider, Brian Schwartz, Mark P Nelder
To determine the Ontario-specific risk of local and travel-related Zika virus transmission in the context of a public health emergency of international concern, Public Health Ontario (PHO) completed a rapid risk assessment (RRA) on January 29, 2016, using a newly developed RRA guidance tool. The RRA concluded that risk of local mosquito-borne transmission was low, with a high risk of imported cases through travel. The RRA was updated 3 times based on predetermined triggers. An independent evaluation assessed both the application of the RRA guidance tool (process evaluation) and the usefulness of the RRA (outcome evaluation)...
May 2017: Health Security
https://www.readbyqxmd.com/read/28636161/infinity-sperm-storage-the-gift-that-keeps-on-giving
#15
Gauthier Schang, Beatriz Fernandez-Fuertes, Samantha C Lean, Alexandra L Nguyen, Osvaldo Bogado Pascottini
Female Drosophila retain sperm for up to two weeks post-copulation in a network of storage organs includng the bursa, the seminal receptacle, and the spermathecae. This image shows the seminal receptacle of a Drosophila melanogaster female, 2-hrs post-copulation between a LHM (wild-type) female with a Protamine B (green), β-Tubulin (blue) fluorescently tagged male, whose sperm can be visualized within the female. This 'infinity' structure of the seminal receptacle resembles the tubular coil that allows for the storage of very long sperm relative to female body size -up to 20 times the length of the female in some Drosophila species...
June 21, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28635544/heparin-new-life-for-an-old-drug
#16
Carlos Raúl Aláez-Versón, Elena Lantero, Xavier Fernàndez-Busquets
Heparin is one of the oldest drugs, which nevertheless remains in widespread clinical use as an inhibitor of blood coagulation. The history of its identification a century ago unfolded amid one of the most fascinating scientific controversies turning around the distribution of credit for its discovery. The composition, purification and structure-function relationship of this naturally occurring glycosaminoglycan regarding its classical role as anticoagulant will be dealt with before proceeding to discuss its therapeutic potential in, among other, inflammatory and infectious disease, cancer treatment, cystic fibrosis and Alzheimer's disease...
June 21, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28633282/editorial-host-attractiveness-and-malaria-transmission-to-mosquitoes
#17
Lauren Cator
No abstract text is available yet for this article.
June 13, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28632829/-advances-in-dengue-virus-research-in-colombia-the-role-of-cellular-micrornas-as-an-anti-dengue-virus-response
#18
Juan Camilo Castrillón-Betancur, Silvio Urcuqui-Inchima
Dengue is one of the most important mosquito-borne diseases, and its incidence has increased at an alarming rate in recent years, becoming a real public health problem. Currently, there is no vaccine or medication or proper treatment for dengue control. Considering this situation, it is necessary to prioritize the search for new alternatives and strategies for dengue prevention and control, in order to reduce not only the economic burden of endemic countries, but also to improve the quality of life of patients...
April 2017: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/28630586/surveillance-efforts-after-mass-drug-administration-to-validate-elimination-of-lymphatic-filariasis-as-a-public-health-problem-in-vanuatu
#19
Fasihah Taleo, George Taleo, Patricia M Graves, Peter Wood, Sung Hye Kim, Masayo Ozaki, Hayley Joseph, Brian Chu, Alex Pavluck, Aya Yajima, Wayne Melrose, Kazuyo Ichimori, Corinne Capuano
BACKGROUND: Vanuatu was formerly highly endemic for lymphatic filariasis (LF), caused by Wuchereria bancrofti and transmitted by Anopheles mosquitoes. After a baseline survey showing 4.8% antigen prevalence in 1998, the country conducted nationwide (in one implementation unit) annual mass drug administration (MDA) with albendazole and diethylcarbamazine citrate from 2000 to 2004 and achieved prevalence of 0.2% by 2006 in a representative nationwide cluster survey among all age groups...
2017: Tropical Medicine and Health
https://www.readbyqxmd.com/read/28630474/nanoassembly-routes-stimulate-conflicting-antibody-quantity-and-quality-for-transmission-blocking-malaria-vaccines
#20
Darren B Leneghan, Kazutoyo Miura, Iona J Taylor, Yuanyuan Li, Jing Jin, Karl D Brune, Martin F Bachmann, Mark Howarth, Carole A Long, Sumi Biswas
Vaccine development efforts have recently focused on enabling strong immune responses to poorly immunogenic antigens, via display on multimerisation scaffolds or virus like particles (VLPs). Typically such studies demonstrate improved antibody titer comparing monomeric and nano-arrayed antigen. There are many such studies and scaffold technologies, but minimal side-by-side evaluation of platforms for both the amount and efficacy of antibodies induced. Here we present direct comparison of three leading platforms displaying the promising malaria transmission-blocking vaccine (TBV) target Pfs25...
June 19, 2017: Scientific Reports
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