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Avian Pathology: Journal of the W.V.P.A

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https://www.readbyqxmd.com/read/29016186/adherence-of-ornithobacterium-rhinotracheale-to-chicken-embryo-lung-cells-as-a-pathogenic-mechanism
#1
Miguel A De la Rosa-Ramos, Karina Muñoz-Solís, Mario Palma-Zepeda, Adriana C Gutierrez-Castillo, Edgar O López Villegas, Fernando M Guerra-Infante, Graciela Castro-Escarpulli
Ornithobacterium rhinotracheale (O.rhinotracheale), is a bacterium that causes respiratory disease in birds and it has been isolated in countries with a large poultry production, including Mexico. The pathogenicity mechanisms of this bacterium have not been completely elucidated yet. The capacity of the bacterium to adhere to epithelial cells of chicken in vitro has been evidenced, and since this bacterium has been isolated from the lungs and air sacs of several avian species, the aim of this study was to determine if this bacterium can adhere to chicken lung cells...
October 10, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28911249/transcriptome-analysis-reveals-the-molecular-mechanism-of-hepatic-fat-metabolism-disorder-caused-by-muscovy-duck-reovirus-infection
#2
Quanxi Wang, Mengxi Liu, Lihui Xu, Yijian Wu, Yifan Huang
The aim of this work was to clarify the molecular mechanism underlying the fatty degeneration of livers infected with Muscovy duck reovirus (MDRV), which produces obvious white necrotic foci in the liver. Transcriptome data for MDRV-infected Muscovy duck livers and control livers were sequenced, assembled, and annotated with Illumina(®) HiSeq 2000. The differentially expressed genes were screened and their functions were analysed. We also determined and confirmed the molecular mechanism of the hepatic fat metabolism disorder caused by MDRV infection...
October 10, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28911234/mucopolysaccharidosis-iiib-sanfilippo-syndrome-b-in-a-commercial-emu-dromaius-novaehollandiae-flock
#3
Seiche C Genger, Keijiro Mizukami, Michael P Martin, Jeffrey R Applegate, H John Barnes, Urs Giger
Clinicopathological diagnosis of mucopolysaccharidosis type IIIB (MPS IIIB; Sanfilippo syndrome B), an inherited autosomal recessive lysosomal storage disease, as a cause of losses in a commercial emu flock and screening breeders using a mutation-specific DNA test are described. Between 2012 and 2015, ∼5-10 juvenile emus from a few weeks to several months of age developed progressive neurological signs and died while others in the flock remained healthy. Necropsy of two affected siblings revealed multiple sites of haemorrhage, cytoplasmic periodic acid-Schiff and Luxol fast blue-positive inclusions in neurons, and aggregates of foamy macrophages in visceral organs...
October 10, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28975826/prevalence-and-severity-of-osteochondrosis-of-the-free-thoracic-vertebra-in-three-modern-broiler-strains-and-the-athens-canadian-random-bred-control-broiler
#4
Laura R Chen, M Mitsu Suyemoto, Albarra H Sarsour, H Alejandro Cordova, Edgar O Oviedo-Rondón, H John Barnes, Luke B Borst
Osteochondrosis (OCD) results from a disturbance of endochondral ossification in articular cartilage and is an important cause of lameness in several animal species including chickens. OCD lesions in the free thoracic vertebra (FTV) of chickens are essential to the pathogenesis of pathogenic Enterococcus cecorum. The goal of this study was to determine the prevalence of OCD in the FTV among three modern broiler chicken crosses (strains A/A, A/B, and C/C) and Athens Canadian Random Bred (ACRB) chickens, which served as a control group...
October 4, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28975807/prevalence-of-mites-and-their-impact-on-laying-hen-gallus-gallus-domesticus-farm-facilities-in-egypt-with-an-analysis-of-deltamethrin-residues-in-eggs-and-tissue
#5
Abdelfattah H Eladl, Hamed R Hamed, Reham A El-Shafei
This study was carried out on six laying hen farms, 3 mite-infested and 3 mite-free at Dakahlia and Damietta governorates in Egypt to demonstrate (i) prevalence of different species of mites on laying hen farms; (ii) effects of mite infestation in chicken health and production; (iii) efficacy of deltamethrin on mite infestation and (iv) residues of deltamethrin in eggs and meat. The results showed that, 12 species of mites were detected in the mite-infested farms, this is the first record in Egypt, and the Dermanyssus gallinae was the highest identified species from 295 (40...
October 4, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28972403/detection-of-different-genotypes-of-infectious-bronchitis-virus-and-of-infectious-bursal-disease-virus-in-european-broilers-during-an-epidemiological-study-in-2013-and-the-consequences-for-the-diagnostic-approach
#6
J J de Wit, C Cazaban, R Dijkman, G Ramon, Y Gardin
To gather recent data regarding the infectious bronchitis (IB) and infectious bursal disease (IBD) situation in Europe, a large-scale field epidemiological survey using diagnostic samples has been implemented in 2013 for about six months in several European countries: France, Germany, Greece, Italy, the Netherlands, Poland, Portugal, the Republic of Ireland, Spain and the United Kingdom. In 234 flocks that were sampled, strains from 10 different IBV genotypes were detected: the 793B genotype was detected most frequently, followed by QX, Massachusetts (Mass) and the Xindadi-like strains...
October 3, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28950714/fowl-adenovirus-fadv-induced-diseases-and-strategies-for-their-control-a-review-on-the-current-global-situation
#7
Anna Schachner, Miguel Matos, Beatrice Grafl, Michael Hess
The stand-alone pathogenicity of FAdVs had long been disputed, given the ubiquity of the viruses versus sporadic outbreaks, and variation between experimental studies. However, a globally emerging trend of FAdV-associated diseases has marked the past two decades, with hepatitis-hydropericardium syndrome (HHS) mainly in Asia besides Arabian and Latin American countries, and geographically more disseminated outbreakse of inclusion body hepatitis (IBH). Finally, the appearance of FAdV-induced gizzard erosion (AGE) in Asia and Europe completed the range of diseases...
September 27, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28849665/development-of-sensitive-indirect-enzyme-linked-immunosorbent-assays-for-specific-detection-of-antibodies-against-fowl-adenovirus-serotypes-1-and-4-in-chickens
#8
Franziska Feichtner, Anna Schachner, Evelyn Berger, Michael Hess
Conventional serological methods for detection and differentiation of antibodies against fowl aviadenoviruses (FAdVs) are laborious and time-consuming, therefore ELISAs based upon recombinant proteins were developed in the present study to overcome this limitation for clinically relevant serotypes FAdV-1 and FAdV-4. In order to develop serotype-specific ELISAs, the two distinct fibers, fiber-1 (fib-1) and fiber-2 (fib-2), characteristically present only in FAdV-1 and FAdV-4, were applied separately as coating antigens...
September 25, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28920482/fowl-aviadenovirus-serotype-1-confirmed-as-the-aetiological-agent-of-gizzard-erosions-in-replacement-pullets-and-layer-flocks-in-great-britain-by-laboratory-and-in-vivo-studies
#9
Beatrice Grafl, Cristina Garcia-Rueda, Peter Cargill, Alisdair Wood, Alex Schock, Dieter Liebhart, Anna Schachner, Michael Hess
An investigation into the aetiology and pathogenesis of adenoviral gizzard erosion has been conducted following three natural outbreaks affecting one flock of 6-week-old replacement pullets and two consecutive placements of free range layers at the age of 21 and 23 weeks. Affected flocks showed increased mortality (0.12-0.30% per week), and gizzard lesions were consistent with fowl aviadenovirus (FAdV) involvement. To substantiate the initial findings, a selection of archived formalin-fixed paraffin-embedded gizzard samples from another 12 pullet and layer flocks, for which macroscopic and histopathological diagnosis of the disease were recorded in Great Britain during the period 2009-2016, were also investigated...
September 18, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28874068/characterization-of-a-novel-viil-sub-genotype-of-newcastle-disease-virus-circulating-in-iran
#10
Fereshteh Sabouri, Mehdi Vasfi Marandi, Mohsen Bashashati
Newcastle disease (ND) is an economically important and highly contagious disease of wild and domestic avian species. Despite extensive vaccination efforts of industrial poultry, Newcastle disease virus (NDV) outbreaks causing significant economic losses still occur. Rural chickens may act as a potential reservoir of NDVs for commercial poultry due to poor biosecurity and inadequate vaccination. The aim of this study was to investigate phylogenetic relationship and molecular characterization of eight NDVs isolated from backyard poultry during 2011-2013...
September 6, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28862888/aquatic-bird-bornavirus-1-infection-in-a-captive-emu-dromaius-novaehollandiae-presumed-natural-transmission-from-free-ranging-wild-waterfowl
#11
Adriana M W Nielsen, Davor Ojkic, Christopher J Dutton, Dale A Smith
An adult female emu (Dromaius novaehollandiae) presented with anorexia, maldigestion, weight loss, and various subtle nervous deficits. After four months of unrewarding diagnostics, treatments, and supportive care, the emu was euthanized due to lack of clinical improvement and progressive weight loss. Gross pathology revealed a very narrow pylorus and multiple flaccid diverticula of the small intestines. Histopathological findings included severe lymphoplasmacytic encephalomyelitis and multifocal lymphocytic neuritis associated with the gastrointestinal tract...
September 1, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28859493/characterizing-the-histopathology-of-natural-co-infection-with-marek-s-disease-virus-and-subgroup-j-avian-leukosis-virus-in-egg-laying-hens
#12
Yawen Wen, Qi Huang, Chengcheng Yang, Ling Pan, Guijun Wang, Kezong Qi, Hongmei Liu
Marek's disease virus (MDV) and avian leukosis virus (ALV) are known to cause tumours in egg-laying hens. Here, we investigated the aetiology of tumours in a flock of egg-laying hens vaccinated against MDV. We carried out gross pathology and histopathological examinations of the diseased tissues, identified virus antigen and sequenced viral oncogenes to elucidate the cause of death in 21-22-wk-old hens. At necropsy, diseased hens had distinctly swollen livers, spleens, and proventriculus, and white tumour nodules in the liver...
September 1, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28826238/pair-epitopes-vaccination-enabling-offspring-vaccination-in-the-presence-of-maternal-antibodies
#13
Jacob Pitcovski, Eli Pitcovski, Dana Goldenberg, Ehud Shahar
Maternally derived antibodies (MDAs) are critical for offspring protection during the first days of life. However, due to their short half-life (3-5 days), MDA levels decline rapidly and by 8-15 days post-hatch drop to below protective levels. In addition, MDAs against a specific pathogen often impede the efficient protective immune response to that pathogen by the new-born following vaccination. The combination of these two phenomena generates a gap in protection in the period between loss of MDA protection and development of vaccine-induced protective antibodies...
August 22, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28714747/onset-of-white-striping-and-progression-into-wooden-breast-as-defined-by-myopathic-changes-underlying-pectoralis-major-growth-estimation-of-growth-parameters-as-predictors-for-stage-of-myopathy-progression
#14
Jacqueline Reedy Griffin, Luis Moraes, Macdonald Wick, Michael Snell Lilburn
The broiler industry has incurred significant economic losses due to two muscle myopathies, white striping (WS) and wooden breast (WB), affecting the Pectoralis major (P. major) of commercial broilers. The present study documented macroscopic changes occurring with age/growth in the P. major and P. minor muscles of commercial broilers from day 2 through day 46 (n = 27/day). Distinct myopathic aberrations observed in both breast muscles corresponded to the onset of WB. These distinct morphological changes were used as determinants in developing a ranking system, defining the ontogeny of WB as the following four stages: (1) WS, (2) petechial epimysium haemorrhages, (3) intramuscular haemorrhages and (4) ischaemia...
August 21, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28669198/pathological-and-microbiological-investigations-into-cases-of-bacterial-chondronecrosis-and-osteomyelitis-in-broiler-poultry
#15
Dinidu S Wijesurendra, Anthony Neal Chamings, Rhys Nathan Bushell, Denise O' Rourke, Mark Stevenson, Marc Serge Marenda, Amir H Noormohammadi, Andrew Stent
Bacterial chondronecrosis and osteomyelitis (BCO) is increasingly recognized as a major cause of lameness in commercial broilers chickens worldwide, but the pathogenesis of the condition is incompletely understood. This was a longitudinal study of 20 commercial broiler farms in Victoria, Australia, to investigate the aetiology and pathology of BCO. Thorough postmortem examination was performed on culled and dead birds (n = 325) from 20 different flocks at either 1 week, 4 weeks or 5 weeks of age and samples were analysed by conventional bacteriology, molecular identification of infectious organisms detected, serology and histopathology...
August 16, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28649856/the-efficacy-of-inactivated-escherichia-coli-autogenous-vaccines-against-the-e-coli-peritonitis-syndrome-in-layers
#16
W J M Landman, J H H van Eck
Autogenous Escherichia coli vaccines to prevent the E. coli peritonitis syndrome (EPS) in laying hens are often used in the field, although their effectiveness has not been demonstrated yet. Therefore, in this study, which consisted of two experiments, their efficacy was assessed. In the first experiment, the EPS-inducing ability of three E. coli isolates originating from bone marrow of hens that died due to EPS and with different Pulsed-Field Gel Electrophoresis patterns, was examined by intravenous inoculation of the isolates in 17-week-old brown layers...
August 16, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28762757/molecular-characterization-and-phylogenetic-analysis-of-virulent-marek-s-disease-virus-field-strain-in-broiler-chickens-in-japan
#17
Hoda A Abd-Ellatieff, Abdelrahman A Abou Rawash, Hany F Ellakany, Wael M Goda, T Suzuki, Tokuma Yanai
Marek's disease (MD) is a lymphoproliferative disease causing a serious threat in poultry production. Field strains of Marek's disease virus (MDVs) are continuously re-emerging, causing great economical losses to the poultry industry worldwide in spite of the intensive vaccination and restrictive management policy used. Histopathological and molecular characterizations of MDVs are essential for monitoring the changes of viruses and evaluating the effectiveness of existing vaccines. During 2016, 190 visceral tumor tissues representing 30 vaccinated chicken flocks from Gifu prefecture, Japan were analyzed...
August 1, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28758799/single-tracheal-inoculation-of-aspergillus-fumigatus-conidia-induced-aspergillosis-in-juvenile-falcons-falco-spp
#18
Dominik Fischer, Lieven Van Waeyenberghe, Klaus Failing, An Martel, Michael Lierz
Aspergillosis is a common and life-threatening respiratory disease in raptors with acute and chronic courses. Among raptors, gyr falcons (Falco rusticolus) and their hybrids are often declared to be highly susceptible with juvenile individuals being the most susceptible. However, species and age specific experimental studies are lacking and minimal infective doses for Aspergillus spp. conidia are unknown. Therefore, 8-week old, healthy gyr hybrid falcons (F. rusticolus X F. cherrug) (N=18) were experimentally infected with Aspergillus fumigatus using a single intratracheal inoculation with varying dosages of conidia (10(2) to 10(7) conidia)...
July 31, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28737107/characterization-of-enterococcus-faecalis-isolates-by-chicken-embryo-lethality-assay-and-eric-pcr
#19
Ana E Blanco, Martin Barz, David Cavero, Wiebke Icken, A Reza Sharifi, Matthias Voss, Carlos Buxadé, Rudolf Preisinger
Enterococcus faecalis is the major causative agent of amyloid arthropathy in chickens. Given the difficulty of estimating the risk from field strains, the Embryo Lethality Assay (ELA) is proposed in this study as model to predict the virulence of 68 avian E. faecalis strains. Additionally, Enterobacterial Repetitive Intergenic Consensus Polymerase Chain Reaction (ERIC-PCR) was used to characterize the genetic diversity of the E. faecalis strains. The ELA was performed ten times with subsets of seven-eight E...
July 24, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28737063/genetic-diversity-and-antimicrobial-resistance-profile-of-enterococcus-faecalis-isolated-from-broilers-with-vertebral-osteomyelitis-in-southeast-brazil
#20
Juliana Fortes Vilarinho Braga, Carlos Augusto Gomes Leal, Camila Costa Silva, André Almeida Fernandes, Nelson Rodrigo da Silva Martins, Roselene Ecco
Vertebral osteomyelitis (VO) is a worldwide emerging disease that affects broilers. Recently, the isolation of Enterococcus faecalis in cases of the disease has been described. This study aimed at determining the genetic diversity and antimicrobial resistance profile of 12 Enterococcus faecalis strains isolated from broilers with VO. Strains were isolated from nine flocks from six farms in a high-density poultry production area in Southeast Brazil and were evaluated using multilocus sequence typing (MLST) and phylogenetic analysis...
July 24, 2017: Avian Pathology: Journal of the W.V.P.A
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