A study of Newcastle disease virus obtained from exotic caged birds in Tehran between 2009 and 2010.

In this study, the PCR test was found to be a more sensitive and powerful method than the HA and HI tests for detection of NDV reservoirs and carrier status in exotic birds. Also, the frequency of infection with the virulent type showed that the exotic birds should probably be considered one of the main causes of recurrent annual epidemics of Newcastle disease in endemic regions. PMID: 23391178 [PubMed - in process]
Source: Avian Pathology - Category: Pathology Authors: Tags: Avian Pathol Source Type: research

Related Links:

This study reports virological and epidemiological data accumulated through passive surveillance conducted during 1,825 herd visits from 2011 to 2018. Among them, 887 (48.6%) tested swIAV-positive. The proportion of positive cases remained stable year-on-year and year-round. The European avian-like swine H1N1 (H1avN1) virus was the most frequently identified (69.6%), and was widespread across the country. The European human-like reassortant swine H1N2 (H1huN2) virus accounted for 22.1% and was only identified in the north-western quarter and recently in the far north. The 2009 pandemic H1N1 (H1N1pdm) virus (3.6%) was detec...
Source: Veterinary Microbiology - Category: Veterinary Research Source Type: research
Publication date: Available online 21 June 2019Source: Antiviral ResearchAuthor(s): Ariane J. Brown, John J. Won, Rachel L. Graham, Kenneth H. Dinnon, Amy C. Sims, Joy Y. Feng, Tomas Cihlar, Mark R. Denison, Ralph S. Baric, Timothy P. SheahanAbstractThe genetically diverse Orthocoronavirinae (CoV) family is prone to cross species transmission and disease emergence in both humans and livestock. Viruses similar to known epidemic strains circulating in wild and domestic animals further increase the probability of emergence in the future. Currently, there are no approved therapeutics for any human CoV presenting a clear unmet ...
Source: Antiviral Therapy - Category: Virology Source Type: research
Abstract The genetically diverse Orthocoronavirinae (CoV) family is prone to cross species transmission and disease emergence in both humans and livestock. Viruses similar to known epidemic strains circulating in wild and domestic animals further increase the probability of emergence in the future. Currently, there are no approved therapeutics for any human CoV presenting a clear unmet medical need. Remdesivir (RDV, GS-5734) is a monophosphoramidate prodrug of an adenosine analog with potent activity against an array of RNA virus families including Filoviridae, Paramyxoviridae, Pneumoviridae, and Orthocoronavirina...
Source: Antiviral Research - Category: Virology Authors: Tags: Antiviral Res Source Type: research
by Sifat A. Moon, Lee W. Cohnstaedt, D. Scott McVey, Caterina M. Scoglio West Nile virus (WNV)—a mosquito-borne arbovirus—entered the USA through New York City in 1999 and spread to the contiguous USA within three years while transitioning from epidemic outbreaks to endemic transmission. The virus is transmitted by vector competent mosquitoes and maintained in the avian populations. WNV spatial distribution is mainly determined by the movement of residential and migratory avian populations. We developed an individual-level heterogeneous network framework across the USA with the goal of understanding the long-r...
Source: PLoS Computational Biology - Category: Biology Authors: Source Type: research
This study identified genomic regions and candidate genes that are associated with response to NDV during heat stress in Hy-Line Brown layer chickens. Regions identified for viral titer on chromosome 1 and 24, at 2 and 6 dpi, respectively, included several genes that have key roles in regulating the immune response.
Source: Genes - Category: Genetics & Stem Cells Authors: Tags: Article Source Type: research
Recently, the hemagglutinin characteristics, pathogenicity, and antigenic variation of highly pathogenic (HP) H7N9 avian influenza viruses (AIVs) were reported in this journal.1 H7N9 AIVs have been endemic in chicken since their emergence in China in February 20132, and have triggered five epidemics of human infections.3, 4 At first, the 2013 H7N9 viruses were nonpathogenic in chickens. However, some H7N9 viruses transitioned from low to high pathogenicity for chicken during the 5th wave.5, 6 These H7N9 HPAIVs were not only destructive to poultry, but also lethal to humans.
Source: Journal of Infection - Category: Infectious Diseases Authors: Tags: Letter to the Editor Source Type: research
In this study, we developed and evaluated a lateral flow dipstick recombinase polymerase amplification (LFD-RPA) assay for rapid detection of both hemagglutinin and neuraminidase gene of H7N9. Our H7-LFD-RPA and N9-LFD-RPA assay were able to detect 32 fg H7N9 nucleic acid which is more convenient and rapid than previous methods. Through detecting 50 influenza positive samples, cross-reaction was not found with other subtypes of influenza virus. The 100% analytical specificity and sufficient analytical sensitivity results agreed the real time reverse transcription polymerase chain reaction (RT-PCR) assay. The results data d...
Source: Biological and Pharmaceutical Bulletin - Category: Drugs & Pharmacology Authors: Tags: Biol Pharm Bull Source Type: research
DAVID E. BLOOM is the Clarence James Gamble Professor of Economics and Demography, DANIEL CADARETTE is a research assistant, and JP SEVILLA is a research associate, all at Harvard University’s T.H. Chan School of Public Health.By David E. Bloom, Daniel Cadarette and JP SevillaWASHINGTON DC, Jul 3 2018 (IPS)Infectious diseases and associated mortality have abated, but they remain a significant threat throughout the world.We continue to fight both old pathogens, such as the plague, that have troubled humanity for millennia and new pathogens, such as human immunodeficiency virus (HIV), that have mutated or spilled over ...
Source: IPS Inter Press Service - Health - Category: International Medicine & Public Health Authors: Tags: Active Citizens Development & Aid Economy & Trade Global Headlines Health TerraViva United Nations Source Type: news
AbstractAvian influenza (AI) vaccines are widely used to control and eliminate the ongoing avian influenza virus epidemic in Egypt. A strict vaccination policy with inactivated AI vaccines has been widely applied, however the virus still circulating, evolving and causing great negative impact to the poultry sector in Egypt. Therefore, an updated poultry vaccination policy using different vaccine technologies might be valuable as an innovative additional control strategy of AIV in Egypt. In the present study, the effectiveness of different avian influenza (AI) vaccination schedules was evaluated in 300 commercial layer chic...
Source: Veterinary Research Communications - Category: Veterinary Research Source Type: research
Authors: Mu R, Yang Y Abstract An SEIR type of compartmental model with nonlinear incidence and recovery rates was formulated to study the combined impacts of psychological effect and available resources of public health system especially the number of hospital beds on the transmission and control of A(H7N9) virus. Global stability of the disease-free and endemic equilibria is determined by the basic reproduction number as a threshold parameter and is obtained by constructing Lyapunov function and second additive compound matrix. The results obtained reveal that psychological effect and available resources do not c...
Source: Computational and Mathematical Methods in Medicine - Category: Statistics Tags: Comput Math Methods Med Source Type: research
More News: Bird Flu | Endemics | Epidemics | Epidemiology | Middle East Health | Pathology | Study | Zoology