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https://www.readbyqxmd.com/read/27913979/genetic-diversity-of-the-genotype-vii-newcastle-disease-virus-identification-of-a-novel-viij-sub-genotype
#1
Cong Xue, Yanlong Cong, Renfu Yin, Yixue Sun, Chan Ding, Shengqing Yu, Xiufan Liu, Shunlin Hu, Jing Qian, Qianliang Yuan, Mingxi Yang, Chunfeng Wang, Zhuang Ding
Newcastle disease (ND) is a highly contagious disease of poultry caused by Newcastle disease virus (NDV). Multiple genotypes of NDV have been circulating worldwide and NDV is continuously evolving, resulting into more diversity. Of multiple viral genotypes, VII is particularly important given that it had been associated with most recent ND outbreaks worldwide. In this study, an epidemiological investigation performed in northeastern China during 2014-2015 showed that 11 genotype VII isolates amounted to 55 percent in a total number of NDV isolates...
December 2, 2016: Virus Genes
https://www.readbyqxmd.com/read/27910748/factors-influencing-the-amino-acid-and-peptide-transporter-proteins-mrna-expression-in-avian-species
#2
Bahman Navidshad, Seyed Ziaodin Mirhoseini
The commercial strains of broiler chickens have genetically selected to reach market weight at younger ages. In order to sustain increased growth rate requires an efficient assimilation of nutrients from the intestinal lumen, which is permitted through nutrient assimilation through the enterocytes that is facilitated by many nutrient transporter proteins. These trans-membrane proteins have specific action, well known kinetics and assist in the partitioning of nutrients among tissues. Amino acids are transported across the plasma membrane as free amino acids or short chain peptides through several independent systems encoded by various nutrient transporter gene products, and these systems may act on multiple substrates...
2016: Critical Reviews in Eukaryotic Gene Expression
https://www.readbyqxmd.com/read/27910747/effect-of-dietary-fat-on-gene-expression-in-poultry-a-review
#3
Bahman Navidshad, M Royan
Traditionally, poultry farmers aimed to produce birds with high body weight and feed conversion ratio. However, in line with current developments, there are other traits that must be taken into account as well. These include producing poultry meat with lower body fat content and improving the nutritional quality of the poultry meat to appeal to consumer requirements. The interrelated importance of human diet and health status is an ancient subject. Human foods as a lifestyle factor is involved in the incidence of many types of diseases, such as cardiovascular diseases and cancer...
2016: Critical Reviews in Eukaryotic Gene Expression
https://www.readbyqxmd.com/read/27908832/evaluation-of-two-strains-of-marek-s-disease-virus-serotype-1-for-the-development-of-recombinant-vaccines-against-very-virulent-infectious-bursal-disease-virus
#4
Kai Li, Yongzhen Liu, Changjun Liu, Li Gao, Yulong Gao, Yanping Zhang, Hongyu Cui, Xiaole Qi, Li Zhong, Xiaomei Wang
Attenuated strains of Marek's disease virus serotype 1 (MDV1), and the closely related herpesvirus of turkeys, are among the most potent vectors for development of recombinant vaccines for poultry. To investigate the effects of MDV1 strain characteristics on the protective efficacy of the recombinant vaccines, we developed two recombinant MDV1 vaccines for expressing the VP2 gene of infectious bursal disease virus (IBDV) based on two different MDV1 strains, the attenuated strain 814 and the Meq gene-deleted recombinant MDV1 strain rLMS△Meq, as the viral vectors...
November 28, 2016: Antiviral Research
https://www.readbyqxmd.com/read/27907206/intestinal-fluid-permeability-in-atlantic-salmon-salmo-salar-l-is-affected-by-dietary-protein-source
#5
Haibin Hu, Trond M Kortner, Karina Gajardo, Elvis Chikwati, John Tinsley, Åshild Krogdahl
In Atlantic salmon (Salmo salar L.), and also in other fish species, certain plant protein ingredients can increase fecal water content creating a diarrhea-like condition which may impair gut function and reduce fish growth. The present study aimed to strengthen understanding of the underlying mechanisms by observing effects of various alternative plant protein sources when replacing fish meal on expression of genes encoding proteins playing key roles in regulation of water transport across the mucosa of the distal intestine (DI)...
2016: PloS One
https://www.readbyqxmd.com/read/27906584/effects-of-the-transforming-growth-factor-beta-signaling-pathway-on-the-differentiation-of-chicken-embryonic-stem-cells-into-male-germ-cells
#6
Yani Zhang, Yingjie Wang, Qisheng Zuo, Dong Li, Wenhui Zhang, Chao Lian, Beibei Tang, Tianrong Xiao, Man Wang, Kehua Wang, Bichun Li
The objectives of the present study were to screen for key gene and signaling pathways involved in the production of male germ cells in poultry and to investigate the effects of the transforming growth factor beta (TGF-β) signaling pathway on the differentiation of chicken embryonic stem cells (ESCs) into male germ cells. The ESCs, primordial germ cells, and spermatogonial stem cells (SSCs) were sorted using flow cytometry for RNA sequencing (RNA-seq) technology. Male chicken ESCs were induced using 40 ng/mL of bone morphogenetic protein 4 (BMP4)...
November 2016: Cellular Reprogramming
https://www.readbyqxmd.com/read/27903065/predominance-and-geo-mapping-of-avian-influenza-h5n1-in-poultry-sectors-in-egypt
#7
Abdelsatar Arafa, Ihab El-Masry, Shereen Khoulosy, Mohammed K Hassan, Moussa Soliman, Olubunmi G Fasanmi, Folorunso O Fasina, Gwenaelle Dauphin, Juan Lubroth, Yilma M Jobre
Highly pathogenic avian influenza (HPAI) virus of the H5N1 subtype has been enzootic in the Egyptian poultry with significant human infections since 2008. This work evaluates the epidemiological and virological information from February 2006 to May 2015 in spatial and temporal terms. Only data with confirmed HPAI H5N1 sub-type were collected, and matched with the epidemiological data from various spatially and temporally-dispersed surveillances implemented between 2006 and 2015. Spatio-temporal analysis was conducted on a total of 3338 confirmed H5N1 HPAI poultry disease outbreaks and outputs described based on transmission patterns, poultry species, production types affected, trade, geographic and temporal distributions in Egypt...
November 28, 2016: Geospatial Health
https://www.readbyqxmd.com/read/27902917/coccidiosis-in-the-chukar-partridge-alectoris-chukar-a-survey-of-coccidiosis-outbreaks-and-a-test-of-anticoccidial-drugs-against-eimeria-kofoidi
#8
R W Gerhold, A L Fuller, L R McDougald
Field isolates of coccidia from 20 natural outbreaks in the chukar partridge ( Alectoris chukar ) were received from gamebird farms in 10 U.S. states. These were propagated in the laboratory and identified by microscopy and PCR. Of 20 samples, 18 were Eimeria kofoidi, two were Eimeria legionensis only, and one was a mixture of the two species. One isolate of E. kofoidi also contained an unidentified species detected only by PCR, nucleotide sequencing, and phylogenetic analysis. The efficacy of anticoccidial drugs against chukar coccidia was tested with experimental infections in battery cages...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902914/inactivation-of-avian-influenza-virus-in-nonpelleted-chicken-feed
#9
H Toro, V L van Santen, C Breedlove
Corn stored outside could become contaminated with avian influenza virus (AIV) from wild bird droppings. AIV-contaminated ingredients could pass into the poultry flocks in nonpelleted chicken feed. The efficacy of two disinfectants at inactivating AIV in chicken feed was evaluated. Both Termin-8 (a blend of formaldehyde, propionic acid, terpenes, and surfactant) and Finio (a blend of approved phytochemicals and carboxylic acids) effectively inactivated AIV in chicken feed. Because stability of infectious AIV in chicken feed is limited, we evaluated addition of protein (skim milk powder) to the virus suspension...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902913/regulatory-considerations-for-the-approval-of-drugs-against-histomoniasis-blackhead-disease-in-turkeys-chickens-and-game-birds-in-the-united-states
#10
Prajwal R Regmi, Ashley L Shaw, Laura L Hungerford, Janis R Messenheimer, Tong Zhou, Padmakumar Pillai, Amy Omer, Jeffrey M Gilbert
Histomoniasis, commonly referred to as blackhead disease, is a serious threat to the turkey and game bird industries worldwide, and it is having an increasingly negative impact on the chicken industry as well. The Food and Drug Administration's (FDA) Center for Veterinary Medicine (CVM), charged with the approval and regulation of new animal drugs in the United States, understands the rising need for the availability of therapeutic options against histomoniasis. CVM has actively engaged in discussions with the poultry industry, academic institutions, and animal health companies regarding the current status of histomoniasis in the United States and varied success of past and current management, prophylactic, and therapeutic interventions that have been used against the disease...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902910/recombinant-hemagglutinin-of-avian-influenza-virus-h5-expressed-in-the-chloroplast-of-chlamydomonas-reinhardtii-and-evaluation-of-its-immunogenicity-in-chickens
#11
Inkar Castellanos-Huerta, Bernardo Bañuelos-Hernández, Guillermo Téllez, Sergio Rosales-Mendoza, Luis G Brieba, Elizabeth Esquivel-Ramos, Josué I Beltrán-López, Gilberto Velazquez, Isidro Fernandez-Siurob
Globally, avian influenza (AI) is a serious problem in poultry farming. Despite vaccination, the prevalence of AI in México highlights the need for new approaches to control AI and to reduce the economic losses associated with its occurrence in susceptible birds. Recombinant proteins from avian influenza virus (AIV) have been expressed in different organisms, such as plants. The present study investigated the feasibility of designing and expressing the HA protein of AIV in the transplastomic microalga Chlamydomonas reinhardtii as a novel approach for AIV control and taking advantage of culture conditions, its reproductive range, and safe use in consideration of the generally regarded as safe food ingredient regulatory classification...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902907/thermal-stability-study-of-five-newcastle-disease-attenuated-vaccine-strains
#12
Zineb Boumart, Jihane Hamdi, Samira Daouam, Amal Elarkam, Khalid Omari Tadlaoui, Mehdi El Harrak
Newcastle disease (ND) is a big concern throughout the world because of the devastating losses that can occur with commercial and backyard poultry. The major problem in many countries is the loss of the vaccine's effectiveness due to inadequate use or storage conditions, particularly in hot climates. In the present study, stability of the five, most-used NDV vaccine strains (I-2, LaSota, B1, Clone 30 [C30], and VG-GA) was tested comparatively at different storage temperatures (4 and 37 C for the freeze-dried form and 4, 24, 37, and 45 C for the freeze-dried vaccine reconstituted in diluents)...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902904/infection-with-some-infectious-bursal-disease-virus-pathotypes-produces-virus-in-chicken-muscle-tissue-and-the-role-of-humoral-immunity-as-a-mitigation-strategy
#13
Mariana Sá E Silva, Kateri Bertran, Kira Moresco, Daral J Jackwood, David E Swayne
Infectious bursal disease virus (IBDV) causes important economic losses and negatively affects global trade in poultry and poultry products. This study determined the presence of IBDV in primary lymphoid tissues and muscle tissue of infected broilers and the role of vaccination as a mitigation strategy. In the first study, specific-pathogen-free (SPF) broiler chickens were challenged with STC (classical [cIBDV]), Indiana (variant [varIBDV]), rA (very virulent [vvIBDV]), or Ohio (serotype 2, avirulent) IBDV...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902903/characterization-of-thai-mycoplasma-synoviae-isolates-by-sequence-analysis-of-partial-vlha-gene
#14
Kriengwich Limpavithayakul, Jiroj Sasipreeyajan, Somsak Pakpinyo
Mycoplasma synoviae (MS), a remarkable pathogen in poultry, causes subclinical infection of the upper respiratory tract and an infectious synovitis, especially in the tendon sheaths and synovial membranes of joints. Because the specific detection of MS 16S rRNA gene-based PCR was unsuitable for strain differentiation, vlhA gene-based PCR was designed to differentiate the MS strains. The vlhA gene of MS encodes for hemagglutinin and other immunodominant membrane proteins involved in colonization, antigenic variations, and virulence...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902902/history-of-the-first-generation-marek-s-disease-vaccines-the-science-and-little-known-facts
#15
Karel A Schat
Shortly after the isolation of Marek's disease (MD) herpesvirus (MDV) in the late 1960s vaccines were developed in England, the United States, and The Netherlands. Biggs and associates at the Houghton Poultry Research Station (HPRS) in England attenuated HPRS-16, the first cell-culture-isolated MDV strain, by passaging HPRS-16 in chick kidney cells. Although HPRS-16/Att was the first commercially available vaccine, it never became widely used and was soon replaced by the FC126 strain of herpesvirus of turkeys (HVT) vaccine developed by Witter and associates at the Regional Poultry Research Laboratory (now Avian Disease and Oncology Laboratory [ADOL]) in East Lansing, MI...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902900/sensitivity-and-specificity-estimation-for-the-clinical-diagnosis-of-highly-pathogenic-avian-influenza-in-the-egyptian-participatory-disease-surveillance-program
#16
C Verdugo, I El Masry, Y Makonnen, H Hannah, F Unger, M Soliman, S Galal, J Lubroth, D Grace
Many developing countries lack sufficient resources to conduct animal disease surveillance. In recent years, participatory epidemiology has been used to increase the cover and decrease the costs of surveillance. However, few diagnostic performance assessments have been carried out on participatory methods. The objective of the present study was to estimate the diagnostic performance of practitioners working for the Community-Based Animal Health and Outreach (CAHO) program, which is a participatory disease surveillance system for the detection of highly pathogenic avian influenza outbreaks in Egypt...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902899/endemic-variation-of-h9n2-avian-influenza-virus-in-china
#17
Yu-Fu Liu, Han-Zhang Lai, Lin Li, Yu-Peng Liu, Wen-Yan Zhang, Ren Gao, Wen-Ke Huang, Qin-Fang Luo, Yan Gao, Qiong Luo, Xiao-Yu Xie, Jia-Hua Xu, Rui-Ai Chen
Forty-two H9N2 subtype AIV strains were isolated from vaccinated commercial chickens in China from 2012 to 2015. Their HA genes had nucleotide sequence homology from 86.7% to 99.7%, and similarity to the classic vaccine strain was 88.6%-92.6%. A comparison was carried out with published HA genes (410 H9 strains) and whole genomes (306 strains) isolated in China during 2012-2015. Interestingly, 99.1% (448/452) of Chinese H9N2 AIV belonged to lineage h9.4.2, and 98.5% (445/452) of the viruses belonged to h9.4...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902896/the-efficacy-of-chitosan-adjuvanted-mycoplasma-gallisepticum-bacterin-in-chickens
#18
Arithat Limsatanun, Jiroj Sasipreeyajan, Somsak Pakpinyo
Mycoplasma gallisepticum (MG) is one of the major pathogens that cause respiratory signs in the poultry industry. To control MG infection, vaccination is the useful procedure. In this study, MG vaccine was developed by using the local Thai MG isolate (AHRL 20/52). Chitosan, a polysaccharide adjuvant derived from crustaceans, has been successfully used in various vaccines. The objectives of this study were to prepare MG bacterins by using chitosan, serving as an adjuvant, to determine protection against the field Thai MG isolate and to evaluate tissue reaction at the injection site...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902894/the-first-detection-of-ornithobacterium-rhinotracheale-in-new-zealand
#19
H J Ha, N Christensen, S Humphrey, T Haydon, G Bernardi, T Rawdon
Ornithobacterium rhinotracheale (ORT) has been considered exotic to New Zealand and thus, any samples from poultry suspected of ORT infection are submitted as part of an exotic disease investigation managed by Ministry for Primary Industries (MPI) and subjected to standardized test protocols carried out in the physical containment level 3+ laboratory at MPI's Animal Health Laboratory (AHL). All previous exotic disease investigations concerning ORT produced negative results by bacterial culture and conventional PCR...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902350/novel-reassortant-h9n2-viruses-in-pigeons-and-evidence-for-antigenic-diversity-of-h9n2-viruses-isolated-from-quails-in-egypt
#20
Ahmed Kandeil, Rabeh El-Shesheny, Asmaa Maatouq, Yassmin Moatasim, Zhipeng Cai, Pamela McKenzie, Richard Webby, Ghazi Kayali, Mohamed Ahmed Ali
The endemicity of avian influenza viruses (AIVs) among Egyptian poultry represents a public health risk. Co-circulation of low pathogenic AIV H9N2 subtype with highly pathogenic AIV H5N1 subtype in Egyptian farms potentiates the possibility to generate novel reassortant viruses. Herein, the genetic characteristics of surface glycoproteins of 59 Egyptian H9N2 viruses, isolated between 2013 and 2015, were analyzed. To elucidate the potential of genetic reassortment, 10 H9N2 isolates were selected based on different avian hosts (chickens, ducks, pigeons and quails) and conducted for phylogenetic analyses of full genome sequences...
November 11, 2016: Journal of General Virology
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