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

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https://www.readbyqxmd.com/read/28303720/primary-newcastle-disease-vaccination-of-broilers-comparison-of-the-antibody-seroresponse-and-adverse-vaccinal-reaction-after-eye-nose-drop-or-coarse-spray-application-and-implication-of-the-results-for-a-previously-developed-coarse-dry-powder-vaccine
#1
W J M Landman, C Vervaet, J P Remon, K Huyge, J H H van Eck
To compare antibody seroresponse and adverse vaccinal reaction induced by Newcastle disease (ND) vaccination after eye-nose drop or coarse spray, groups of SPF broiler hens were vaccinated at day 4 (day of hatch is day 0) and intratracheally inoculated with Escherichia coli at day 11. Body weight gain (BWG) was assessed between day 4 and day 18; colibacillosis lesions and serum antibodies were determined at day 18. Meaningful comparison requires similar vaccine uptake. Vaccine virus loss during spray relative to eye-nose drop, which was assessed by comparing the results of endpoint titrations, was 3 log10...
March 17, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28290221/microbiological-diagnosis-and-antimicrobial-sensitivity-profiles-in-diseased-free-living-raptors
#2
Anna Vidal, Laia Baldomà, Rafael A Molina-Lopez, Marga Martin, Laila Darwich
Free-living raptors (birds of prey) can act as reservoirs of potentially zoonotic agents but they also can be affected by microorganisms as target hosts. In this retrospective study, microbiological results (n=663) and antibiotic sensitivity profiles (n=108) of bacterial isolates were analyzed from diseased free-living raptors. Sixty-nine percent of cases (n=457) yielded bacteria: 58% were in pure culture and 42% were of different species. Remarkably, samples from necropsies (47%) had higher percentage of pure isolations than those obtained from clinical (31%) samples (p<0...
March 14, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28290220/specific-antibody-mediated-immunity-in-the-reproductive-tract-of-laying-chickens-immunized-against-newcastle-disease-with-conventional-attenuated-and-inactivated-vaccines
#3
F Rauw, T G Nguyen, E Ngabirano, S Marché, B Lambrecht
Despite the widespread and successful use of Newcastle disease (ND) vaccines, Newcastle disease virus (NDV) can seriously injure the reproductive tract of egg-laying hens, leading to rapid egg-drop and poor shell quality. Few published studies investigated local NDV-specific immune response in the reproductive tract after ND-vaccination of hens. The present study investigated, for the first time, local NDV-specific antibody-mediated immunity in segments of the oviduct during the laying period. Specific pathogen-free (SPF) White Leghorn chickens were immunized following a ND vaccination program applied in the field, which combined ND-attenuated vaccine (inoculated subcutaneously at one day, 2 weeks and 11 weeks of age) with inactivated vaccine (inoculated intramuscularly at 17 weeks)...
March 14, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28277777/riemerella-anatipestifer-extracellular-protease-s-blocks-complement-activation-via-the-classical-and-lectin-pathways
#4
Mengnan Fan, Sihuai Chen, Ludan Zhang, Junxuan Bi, Jiasun Peng, Xinyan Huang, Xin Li, Huan Li, Qin Zhou, Sheng Jiang, Jixiang Li
Riemerella anatipestifer (RA) is the causative agent of infectious serositis in ducklings and other avian species. It is difficult to control the disease due to its 21 serotypes, poor cross-protection, and bacterial resistance to antimicrobial agents. The complement system is an important component of the innate immune system. However, bacterial pathogens exploit several strategies to evade detection by the complement system. Here, we purified and identified a 59-kDa RA extracellular protease S (EcpS) consisting of a gelatinase...
March 2, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28277776/immunogenicity-and-protection-efficacy-evaluation-of-avian-paramyxovirus-serotype-1-apmv-1-isolates-in-experimentally-infected-chicken
#5
John Bosco Omony, Agnes Wanyana, Halid Kirunda, Kizito K Mugimba, Jessica Lukanga Nakavuma, Otim-Onapa Maxwell, Denis Karuhize Byarugaba
Vaccine failures against Newcastle disease vaccinated with the current commercial vaccines have been reported which are associated with many factors, including genotypic and antigenic differences between vaccine isolates and outbreaks strains, although all APMV-1 members belong to one serotype. We assessed the immunoprotection ability of four thermostable, low-virulent ND-virus isolates from Ugandan waterfowl against challenge with a virulent strain (MDT = 36.8h, ICPI = 1.78) isolated from morbid chicken. Six-week-old commercial Leghorn layers, challenged at 21 days post immunization (dpi) were used...
March 2, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28277779/further-investigations-on-the-epidemiology-of-fowl-typhoid-in-brazil
#6
Anny Lucia Del Pilar Celis-Estupiñan, Diego Felipe Alves Batista, Marita Vedovelli Cardozo, Andrei Itajahy Secundo de Souza, Lucas Bocchini Rodrigues Alves, Adriana Maria de Almeida, Paul Andrew Barrow, Angelo Berchieri, Oliveiro Caetano de Freitas Neto
Salmonella Gallinarum (SG) causes fowl typhoid (FT), a disease responsible for economic losses to the poultry industry worldwide. FT has been considered under control in Brazil; nevertheless, since 2012 it has frequently been identified in poultry farming of several Brazilian states. The present study was aimed at assessing: (i) the pathogenicity of a SG strain recently isolated from an FT outbreak affecting chickens of both white and brown layers; (ii) the transmission of SG through eggs and hatching; (iii) the effects of antibiotic therapy on SG persistence in poultry tissues and on its vertical transmission; (iv) the genetic profiles of strains isolated over 27 years by PFGE...
March 1, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28277778/herd-immunity-to-newcastle-disease-virus-in-broiler-flocks-in-israel
#7
Anat Wiseman, Elyakum M Berman
Due to the ongoing need to protect poultry from virulent Newcastle disease virus, all commercial poultry flocks in Israel are vaccinated according to a defined program using a combination of live and inactivated vaccines. The vaccination protocol for broilers during the years of the study comprised a live vaccine administered by spray on the day of hatch, inactivated vaccine by subcutaneous injection at 10-12 days of age, and another live vaccine given by aerosol at 17-21 days of age. A cross-sectional study was designed in order to examine the influence of herd immunity on the risk of Newcastle disease (ND) outbreak in broiler flocks...
March 1, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28277780/development-validation-and-field-evaluation-of-a-quantitative-real-time-pcr-able-to-differentiate-between-field-mycoplasma-synoviae-and-the-ms-h-live-vaccine-strain
#8
R Dijkman, A Feberwee, W J M Landman
A quantitative PCR (qPCR) able to differentiate between field M. synoviae and MS-H vaccine strain was developed, validated and evaluated. It was developed using nucleotide differences in the obg gene. Analytical specificity and sensitivity was assessed using DNA from 194 M. synoviae field samples, three different batches of MS-H vaccine and from 43 other mycoplasma species and both proved to be 100%. The detection limit for field M. synoviae and MS-H vaccine strain was 10(2-3) and 10(2) colony forming units PCR equivalents/g trachea mucus, respectively...
February 20, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28277781/coligranuloma-hj%C3%A3-rre-and-wramby-s-disease-reconsidered
#9
W J M Landman, J H H van Eck
Coligranulomatosis (Hjärre and Wramby's disease) is considered to be a disease of chickens, turkeys and partridges that occurs sporadically in individual, adult birds. Therefore, the condition is not of economic importance, but is of interest due to the similarity of its lesions to those of tuberculosis. In a number of cases the disease could be reproduced by inoculation via artificial routes of granuloma homogenate or Escherichia coli bacteria isolated from the lesions. Oral inoculations always failed. Occasionally, also serious outbreaks of granuloma disease have been reported in chickens, turkeys and quails...
February 9, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28161970/toxicity-of-senna-occidentalis-seeds-in-laying-hens-and-its-effects-on-egg-production
#10
André T Gotardo, Mitsue Haraguchi, Paulo C F Raspantini, Maria L Z Dagli, Silvana L Górniak
Senna occidentalis is a toxic leguminous plant found in many tropical and subtropical regions of the world and causes poisoning mainly in confined animals. The seeds are the most toxic part of the plant and may be present in animal rations. The main toxic component of the S. occidentalis seed is a dianthrone, an anthraquinone-derived compound that affects mitochondrial function. This study evaluated the effects on egg production of low-level contamination of the S. occidentalis in the laying hens' diet. Forty-eight one-day-old pullets were randomly allocated into two treatment groups: control, birds that received no experimental treatment; and external and internal tegument (ET/IT), birds that received a diet containing 0...
February 6, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28151004/evaluation-of-factors-influencing-the-development-of-late-marek-s-disease-virus-induced-immunosuppression-virus-pathotype-and-host-sex
#11
Nik M Faiz, Aneg L Cortes, James S Guy, Oscar J Fletcher, Thomas Cimino, Isabel M Gimeno
Marek's disease virus (MDV) is a herpesvirus that induces lymphoma and immunosuppression in chickens. MDV induced immunosuppression (MDV-IS) is complex and can be divided into two phases: early-MDV-IS associated with cytolytic infection in the lymphoid organs in chickens lacking maternal antibodies against MDV (MAbs) and late-MDV-IS that appears later in the pathogenesis and occurs even in chickens bearing MAbs. We have recently developed a model to reproduce late-MDV-IS under laboratory conditions. This model evaluates late-MDV-IS indirectly by assessing the effect of MDV infection on the efficacy of infectious laryngotracheitis vaccines against challenge with infectious laryngotracheitis virus...
February 2, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/27866413/disbalance-of-calcium-regulation-related-genes-in-broiler-hearts-induced-by-selenium-deficiency
#12
Ziwei Zhang, Man Liu, Zhenqiong Guan, Jie Yang, Zhonghua Liu, Shiwen Xu
Dietary selenium (Se) deficiency may influence the calcium (Ca) homeostasis in broilers. Our objective was to investigate the effects of Se deficiency on Ca regulation-related genes in broiler hearts. In the present study, 1-day-old broilers were fed either a commercial diet (as control group) with 0.15 mg/kg Se or a Se-deficient diet (as L group) with 0.033 mg/kg Se for 35 days. We examined the mRNA expression levels of 15 Ca regulation-related genes (ITPR 1, ITPR 2, ITPR3, RyR2, RyR3, SERCA1s, SLC8A1, PMCA1, CACNA1S, TRPC1, TRPC3, stromal interacting molecule 1, ORAI1, calmodulin (CaLM) and calreticulin (CRT) in broiler hearts...
January 31, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/27807983/development-of-duplex-dual-gene-and-diva-real-time-rt-pcr-assays-and-use-of-feathers-as-a-non-invasive-sampling-method-for-diagnosis-of-turkey-meningoencephalitis-virus
#13
Irit Davidson, Israel Raibstein, Amira Altory-Natour, Michael Simanov, Yevgeny Khinich
The avian flavivirus Turkey Meningoencephalitis Virus (TMEV) causes a neuroparalytic disease of commercial turkeys, expressed in paresis, incoordination, drooping wings and mortality that is controlled by vaccination. The molecular diagnosis using brain tissue RNA has now been upgraded by the development of a diagnostic dual-gene multiplex real-time PCR targeting the envelope and the non-structural NS5 gene, increasing the sensitivity by 10-100-fold compared to the previously existing assays. Based on the recent complete sequences of five TMEV isolates we have now developed a Differentiating Infected from Vaccinated Animals (DIVA) assay, to distinguish between wild-type TMEV strains and the vaccine virus...
January 31, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28132523/pigeon-circovirus-infection-in-disqualified-racing-pigeons-from-taiwan
#14
Yen-Li Huang, Omir Adrian Castaneda, Duangsuda Thongchan, Rupak Khatri-Chhetri, Shinn-Shyong Tsai, Hung-Yi Wu
Pigeons (Columba livia) infected with pigeon circovirus (PiCV) have been reported worldwide. The present study diagnosed PiCV infection in tissue samples of disqualified racing pigeons in Taiwan, using molecular and microscopy diagnostics. Among the 164 dead pigeons examined, 96.95% (159/164) tested positive for PiCV. Severe histopathological lesions, with characteristic inclusions, were observed in various organs of the PiCV-infected pigeons. Multiglobular basophilic intranuclear and intracytoplasmic inclusion bodies were found in the bursa of Fabricius and non-lymphoid tissues...
January 30, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28116916/quantification-of-the-horizontal-transmission-of-mycoplasma-synoviae-in-non-vaccinated-and-ms-h-vaccinated-layers
#15
A Feberwee, R Dijkman, D Klinkenberg, W J M Landman
The number of newly infected animals attributable to one infectious animal per day (= transmission rate β) was assessed in non-vaccinated and MS-H vaccinated experimental SPF White Leghorns after M. synoviae challenge. Furthermore, the effect of vaccination on the shedding of the challenge strain was determined. The following groups were made: a negative control group (n = 5), a vaccinated (MS-H vaccine by eye drop (>10(5.7) color changing units /bird)) non-challenged group (n = 5), two non-vaccinated challenged groups (n = 18 each) and two vaccinated challenged groups (n = 18 each)...
January 24, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28116911/co-circulation-of-paramyxo-and-influenza-viruses-in-pigeons-in-egypt
#16
Shimaa M G Mansour, Fakry F Mohamed, Amal A M Eid, Sunil K Mor, Sagar M Goyal
In recent years, avian influenza virus (AIV) and Newcastle disease virus (NDV) have caused large-scale outbreaks in many countries, including Egypt. The culling and vaccination strategies have failed to control both viruses in Egypt. In this study, we investigated the outbreaks of nervous manifestations and deaths in pigeons between 2013 and 2015. The H5N1 subtype of the highly pathogenic avian influenza (HPAI) virus and pigeon paramyxovirus-1 (PPMV-1), an antigenic variant of NDV, were found to be the cause; AIV and PPMV-1 were isolated from 61...
January 24, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28235395/international-meetings-wvpa-matters-announcements
#17
(no author information available yet)
No abstract text is available yet for this article.
April 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28235394/wvpa-xxth-congress-2017
#18
(no author information available yet)
No abstract text is available yet for this article.
April 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28235393/avian-diseases-60-34-table-of-contents
#19
(no author information available yet)
No abstract text is available yet for this article.
April 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/27928940/epidemiological-and-pathological-investigation-of-fowl-aviadenovirus-serotypes-8b-and-11-isolated-from-chickens-with-inclusion-body-hepatitis-in-spain-2011-2013
#20
S Oliver-Ferrando, R Dolz, C Calderón, R Valle, R Rivas, M Pérez, M Biarnés, A Blanco, K Bertran, A Ramis, N Busquets, N Majó
Inclusion body hepatitis caused by different fowl aviadenovirus (FAdV) serotypes has been described in several countries in recent years. In Spain, from the spring of 2011 to 2013, an increased number of outbreaks in broiler and broiler breeder flocks from different regions occurred. The objectives of the present work were to carry out the molecular characterization of FAdV strains from Spanish inclusion body hepatitis cases and to study the pathogenicity and viral dynamics of these strains in specific pathogen-free (SPF) chickens...
April 2017: Avian Pathology: Journal of the W.V.P.A
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