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https://www.readbyqxmd.com/read/28926632/risk-analysis-of-inter-species-reassortment-through-a-rift-valley-fever-phlebovirus-mp-12-vaccine-strain
#1
Hoai J Ly, Nandadeva Lokugamage, Shoko Nishiyama, Tetsuro Ikegami
Rift Valley fever (RVF) is a mosquito-borne zoonotic disease endemic to Africa and the Arabian Peninsula. The causative agent, Rift Valley fever phlebovirus (RVFV), belongs to the genus Phlebovirus in the family Phenuiviridae and causes high rates of abortions in ruminants, and hemorrhagic fever, encephalitis, or blindness in humans. Viral maintenance by mosquito vectors has led to sporadic RVF outbreaks in ruminants and humans in endemic countries, and effective vaccination of animals and humans may minimize the impact of this disease...
2017: PloS One
https://www.readbyqxmd.com/read/28925970/current-status-of-rift-valley-fever-vaccine-development
#2
REVIEW
Bonto Faburay, Angelle Desiree LaBeaud, D Scott McVey, William C Wilson, Juergen A Richt
Rift Valley Fever (RVF) is a mosquito-borne zoonotic disease that presents a substantial threat to human and public health. It is caused by Rift Valley fever phlebovirus (RVFV), which belongs to the genus Phlebovirus and the family Phenuiviridae within the order Bunyavirales. The wide distribution of competent vectors in non-endemic areas coupled with global climate change poses a significant threat of the transboundary spread of RVFV. In the last decade, an improved understanding of the molecular biology of RVFV has facilitated significant progress in the development of novel vaccines, including DIVA (differentiating infected from vaccinated animals) vaccines...
September 19, 2017: Vaccines
https://www.readbyqxmd.com/read/28924518/clinical-spectrum-of-chikungunya-in-pakistan
#3
Syeda Naqvi, Shehroz Bashir, Chintan Rupareliya, Abdullah Shams, Pirthvi Raj Giyanwani, Zeeshan Ali, Faiza Qamar, Vijesh Kumar, Vikash Talib
Background Chikungunya fever is a pandemic disease caused by an arthropod-borne chikungunya virus (CHIKV). The virus spreads through mosquitoes. This mosquito induced viral illness is clinically suspected on symptoms from fever and severe polyarthralgia. The recent outbreak of chikungunya was reported in November 2016 in the metropolitan city Karachi, Pakistan. We emphasis on the awareness of the etiology and vector control to prevent serious consequences. Method A total number of 1275 patients were included in this cross-sectional study...
July 6, 2017: Curēus
https://www.readbyqxmd.com/read/28922426/a-dna-vaccine-for-crimean-congo-hemorrhagic-fever-protects-against-disease-and-death-in-two-lethal-mouse-models
#4
Aura R Garrison, Charles J Shoemaker, Joseph W Golden, Collin J Fitzpatrick, John J Suschak, Michelle J Richards, Catherine V Badger, Carolyn M Six, Jacqueline D Martin, Drew Hannaman, Marko Zivcec, Eric Bergeron, Jeffrey W Koehler, Connie S Schmaljohn
Crimean-Congo hemorrhagic fever virus (CCHFV) is a tick-borne virus capable of causing a severe hemorrhagic fever disease in humans. There are currently no licensed vaccines to prevent CCHFV-associated disease. We developed a DNA vaccine expressing the M-segment glycoprotein precursor gene of CCHFV and assessed its immunogenicity and protective efficacy in two lethal mouse models of disease: type I interferon receptor knockout (IFNAR-/-) mice; and a novel transiently immune suppressed (IS) mouse model. Vaccination of mice by muscle electroporation of the M-segment DNA vaccine elicited strong antigen-specific humoral immune responses with neutralizing titers after three vaccinations in both IFNAR-/- and IS mouse models...
September 18, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28918235/identification-of-bluetongue-virus-serotypes-1-4-and-17-co-infections-in-sheep-flocks-during-outbreaks-in-brazil
#5
Lorena Lima Barbosa Guimarães, Júlio César Câmara Rosa, Ana Carolina Diniz Matos, Raquel Aparecida S Cruz, Maria Isabel Maldonado Coelho Guedes, Fernanda Alves Dorella, Henrique César Pereira Figueiredo, Saulo Petinatti Pavarini, Luciana Sonne, Zélia Inês Portela Lobato, David Driemeier
Bluetongue (BT) is a vector-borne viral disease caused by the Bluetongue virus (BTV), an Orbivirus from the Reoviridae family, affecting domestic and wild ruminants. BTV circulation in Brazil was first reported in 1978, and several serological surveys indicate that the virus is widespread, although with varied prevalence. In 2014, BT outbreaks affected sheep flocks in Rio Grande do Sul state, causing significant mortality (18.4%; 91/495) in BTV-infected sheep. In total, seven farms were monitored, and one or two sheep from each farm that died due to clinical signs of BT were necropsied...
September 5, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28917320/vector-borne-parasitic-infections-in-dogs-in-the-baltic-and-nordic-countries-a-questionnaire-study-to-veterinarians-on-canine-babesiosis-and-infections-with-dirofilaria-immitis-and-dirofilaria-repens
#6
Valentina Tiškina, Pikka Jokelainen
Canine vector-borne diseases have been spreading northwards in Europe, and canine babesiosis and infections with Dirofilaria immitis (heartworm) and Dirofilaria repens have been diagnosed also in the Baltic and the Nordic countries. We used an online questionnaire to survey how large a proportion of veterinarians in the Baltic (Estonia, Latvia, and Lithuania) and the Nordic countries (Denmark, Finland, Iceland, Norway, and Sweden) saw canine babesiosis cases and dogs infected with D. immitis and D. repens in 2016...
September 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28905982/vector-borne-diseases-in-cats-in-germany
#7
Michèle Bergmann, Katrin Hartmann
Vector-borne diseases (VBDs) are caused by a wide range of pathogens, which are transmitted by a variety of vectors, such as ticks and fleas. As a result of climate changes, more vector-borne diseases are becoming endemic in Germany, not only in dogs, but also in cats. For some of the pathogens prevalence data still need to be investigated in Germany. However, natural infections with Bartonella, Anaplasma, haemotropic Mycoplasma and Borrelia species have already been described in German cats. Clinical relevance of these pathogens is not fully understood, and it is still unknown, why most infected cats stay asymptomatic and which predisposing factors contribute to the development of clinical signs in cats...
September 13, 2017: Tierärztliche Praxis. Ausgabe K, Kleintiere/Heimtiere
https://www.readbyqxmd.com/read/28905230/molecular-detection-of-anaplasma-platys-anaplasma-phagocytophilum-and-wolbachia-sp-but-not-ehrlichia-canis-in-croatian-dogs
#8
Doroteja Huber, Irena Reil, Sanja Duvnjak, Daria Jurković, Damir Lukačević, Miroslav Pilat, Ana Beck, Željko Mihaljević, Lea Vojta, Adam Polkinghorne, Relja Beck
The bacteria Anaplasma platys, Anaplasma phagocytophilum and Ehrlichia canis are tick-borne agents that cause canine vector-borne disease. The prevalence of these pathogens in South Eastern Europe is unknown with the exception of an isolated case of A. platys detected in a dog imported into Germany from Croatia. To gain a better insight into their presence and prevalence, PCR-based screening for these bacterial pathogens was performed on domesticated dogs from different regions of Croatia. Blood samples from 1080 apparently healthy dogs from coastal and continental parts of Croatia as well as tissue samples collected from 63 deceased dogs with a history of anaemia and thrombocytopenia were collected for molecular screening by an Anaplasmataceae-specific 16S rRNA conventional PCR...
September 14, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28903890/human-parasitic-diseases-in-bulgaria-2013-2014
#9
Iskra Rainova, Rumen Harizanov, Iskren Kaftandjiev, Nina Tsvetkova, Ognyan Mikov, Eleonora Kaneva
BACKGROUND: In Bulgaria, more than 20 autochthonous human parasitic infections have been described and some of them are widespread. Over 50 imported protozoan and helminthic infections represent diagnostic and therapeutic challenge and pose epidemiological risk due to the possibility of local transmission. AIMS: To establish the distribution of autochthonous and imported parasitic diseases among the population of the country and to evaluate their significance for the public health system...
September 13, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28902295/sandfly-fauna-diptera-psychodidae-in-an-urban-area-central-west-of-brazil
#10
Wagner de Souza Fernandes, Leandro Machado Borges, Aline Etelvina Casaril, Everton Falcão de Oliveira, Jucelei de Oliveira Moura Infran, Eliane Mattos Piranda, Elisa Teruya Oshiro, Suellem Petilim Gomes, Alessandra Gutierrez de Oliveira
Biological and ecological relations among vectors and their pathogens are important to understand the epidemiology of vector-borne diseases. Camapuã is an endemic area for visceral and tegumentary leishmaniasis. The aim of this study was to characterize the sandfly fauna present in Camapuã , MS, Brazil. Sand flies were collected every fortnight from May 2014 to April 2015 using automatic light traps in the domicile and peridomicile of twelve neighborhoods and forest. The collected specimens were identified based on morphology according to the valid identification keys...
August 24, 2017: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/28902274/chikungunya-virus-outbreak-in-sint-maarten-2013-2014
#11
Maria Henry, Lorraine Francis, Virginia Asin, Karen Polson-Edwards, Babatunde Olowokure
This report describes the outbreak of chikungunya virus (CHIKV) in Sint Maarten, a constituent country of Kingdom of the Netherlands comprising the southern part of the Caribbean island of Saint Martin, from 22 December 2013 (first reported case) through 5 December 2014. The outbreak was first reported by the French overseas collectivity of Saint-Martin in the northern part of the island-the first site in the Americas to report autochthonous transmission of CHIKV. By 5 December 2014, Sint Maarten had reported a total of 658 cases-an overall attack rate of 1...
August 21, 2017: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/28892515/strong-interferon-gamma-mediated-cellular-immunity-to-scrub-typhus-demonstrated-using-a-novel-whole-cell-antigen-elispot-assay-in-rhesus-macaques-and-humans
#12
Manutsanun Sumonwiriya, Daniel H Paris, Piyanate Sunyakumthorn, Tippawan Anantatat, Kemajittra Jenjaroen, Suchintana Chumseng, Rawiwan Im-Erbsin, Ampai Tanganuchitcharnchai, Suthatip Jintaworn, Stuart D Blacksell, Fazle R Chowdhury, Barbara Kronsteiner-Dobramysl, Prapit Teparrukkul, Robin L Burke, Eric D Lombardini, Allen L Richards, Carl J Mason, James W Jones, Nicholas P J Day, Susanna J Dunachie
Scrub typhus is a febrile infection caused by the obligate intracellular bacterium Orientia tsutsugamushi, which causes significant morbidity and mortality across the Asia-Pacific region. The control of this vector-borne disease is challenging due to humans being dead-end hosts, vertical maintenance of the pathogen in the vector itself, and a potentially large rodent reservoir of unclear significance, coupled with a lack of accurate diagnostic tests. Development of an effective vaccine is highly desirable. This however requires better characterization of the natural immune response of this neglected but important disease...
September 11, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28892499/effectiveness-and-economic-assessment-of-routine-larviciding-for-prevention-of-chikungunya-and-dengue-in-temperate-urban-settings-in-europe
#13
Giorgio Guzzetta, Filippo Trentini, Piero Poletti, Frederic Alexandre Baldacchino, Fabrizio Montarsi, Gioia Capelli, Annapaola Rizzoli, Roberto Rosà, Stefano Merler, Alessia Melegaro
In the last decades, several European countries where arboviral infections are not endemic have faced outbreaks of diseases such as chikungunya and dengue, initially introduced by infectious travellers from tropical endemic areas and then spread locally via mosquito bites. To keep in check the epidemiological risk, interventions targeted to control vector abundance can be implemented by local authorities. We assessed the epidemiological effectiveness and economic costs and benefits of routine larviciding in European towns with temperate climate, using a mathematical model of Aedes albopictus populations and viral transmission, calibrated on entomological surveillance data collected from ten municipalities in Northern Italy during 2014 and 2015...
September 11, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28892479/towards-chagas-disease-elimination-neonatal-screening-for-congenital-transmission-in-rural-communities
#14
Pamela Marie Pennington, José Guillermo Juárez, Margarita Rivera Arrivillaga, Sandra María De Urioste-Stone, Katherine Doktor, Joe P Bryan, Clara Yaseli Escobar, Celia Cordón-Rosales
Chagas disease is a neglected tropical disease that continues to affect populations living in extreme poverty in Latin America. After successful vector control programs, congenital transmission remains as a challenge to disease elimination. We used the PRECEDE-PROCEED planning model to develop strategies for neonatal screening of congenital Chagas disease in rural communities of Guatemala. These communities have persistent high triatomine infestations and low access to healthcare. We used mixed methods with multiple stakeholders to identify and address maternal-infant health behaviors through semi-structured interviews, participatory group meetings, archival reviews and a cross-sectional survey in high risk communities...
September 11, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28890510/circulating-genotypes-of-dengue-1-virus-in-south-west-india-2014-2015
#15
Shetty Pooja, Sasidharanpillai Sabeena, Bhaskar Revti, Ramachandran Sanjay, Aithal Anjali, Kumar Rajendra, Sushama Aswathyraj, Dsouza Giselle, Maity Hindol, Govindakarnavar Arunkumar
Dengue is found to be the most prevalent arboviral disease affecting humans. Tropical and subtropical regions are at high risk of dengue virus infections. The clinical manifestations often range from mild fever to fever with hemorrhagic manifestations and shock. Since 2010, India is witnessing a marked increase in the number of Dengue Virus Serotype 1(DENV-1) apart from Dengue Virus 2 (DENV-2) and Dengue Virus 3 (DENV-3) Serotypes. The present study was undertaken to understand the circulating genotypes of DENV-1 in South West India by sequencing the envelope gene of DENV-1 samples representative of the time period 2014-2015...
September 11, 2017: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28889134/pesticide-applicators-questionnaire-content-validation-a-fuzzy-delphi-method
#16
S K Manakandan, I Rosnah, J Mohd Ridhuan, R Priya
BACKGROUND: The most crucial step in forming a set of survey questionnaire is deciding the appropriate items in a construct. Retaining irrelevant items and removing important items will certainly mislead the direction of a particular study. This article demonstrates Fuzzy Delphi method as one of the scientific analysis technique to consolidate consensus agreement within a panel of experts pertaining to each item's appropriateness. This method reduces the ambiguity, diversity, and discrepancy of the opinions among the experts hence enhances the quality of the selected items...
August 2017: Medical Journal of Malaysia
https://www.readbyqxmd.com/read/28887102/molecular-detection-of-vector-borne-pathogens-in-greek-cats
#17
Mathios E Mylonakis, Megan Schreeg, Manolis K Chatzis, Julian Pearce, Henry S Marr, Manolis N Saridomichelakis, Adam J Birkenheuer
Infectious diseases have been increasingly recognized in cats worldwide. The objective of this study was the molecular investigation of the prevalence of selected pathogens in healthy and sick cats from Greece, a country highly endemic for several canine vector-borne pathogens. Blood and/or bone marrow samples from 50 clinically healthy and 50 sick adult (>1 year-old) cats were retrospectively examined for the amplification of Bartonella spp., haemoplasmas, Ehrlichia spp., Anaplasma spp., Babesia spp., and Cytauxzoon spp...
September 1, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28886687/-fleaing-the-plague-adaptations-of-yersinia-pestis-to-its-insect-vector-that-lead-to-transmission
#18
B Joseph Hinnebusch, Clayton O Jarrett, David M Bland
Interest in arthropod-borne pathogens focuses primarily on how they cause disease in humans. How they produce a transmissible infection in their arthropod host is just as critical to their life cycle, however. Yersinia pestis adopts a unique life stage in the digestive tract of its flea vector, characterized by rapid formation of a bacterial biofilm that is enveloped in a complex extracellular polymeric substance. Localization and adherence of the biofilm to the flea foregut is essential for transmission. Here, we review the molecular and genetic mechanisms of these processes and present a comparative evaluation and updated model of two related transmission mechanisms...
September 8, 2017: Annual Review of Microbiology
https://www.readbyqxmd.com/read/28883509/the-circadian-clock-in-immune-cells-controls-the-magnitude-of-leishmania-parasite-infection
#19
Silke Kiessling, Geneviève Dubeau-Laramée, Hyejee Ohm, Nathalie Labrecque, Martin Olivier, Nicolas Cermakian
The intracellular parasite Leishmania uses neutrophils and macrophages as host cells upon infection. These immune cells harbour their own intrinsic circadian clocks, known to influence many aspects of their functions. Therefore, we tested whether the host circadian clocks regulate the magnitude of Leishmania major infection in mice. The extent of parasitic infection varied over 24 h in bone marrow-derived macrophages in vitro and in two different in vivo models, footpad and peritoneal cavity infection. In vivo this was paralleled by time of day-dependent neutrophil and macrophage infiltration to the infection site and rhythmic chemokine expression...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28879619/borrelia-miyamotoi-other-vector-borne-agents-in-cat-blood-and-ticks-in-eastern-maryland
#20
Avery B Shannon, Renee Rucinsky, Holly D Gaff, R Jory Brinkerhoff
We collected blood and tick samples in eastern Maryland to quantify vector-borne pathogen exposure and infection in healthy cats and to assess occupational disease risk to veterinary professionals and others who regularly interact with household pets. Thirty-six percent of healthy cats parasitized by ticks at time of examination (9/25) were exposed to, and 14% of bloods (7/49) tested PCR-positive for, at least one vector-borne pathogen including several bloods and ticks with Borrelia miyamotoi, a recently recognized tick-borne zoonotic bacterium...
September 6, 2017: EcoHealth
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