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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...
April 24, 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
#2
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 (ILT) vaccines against challenge with ILT virus...
April 24, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28345962/immune-responses-to-vaccination-and-infection-with-mycoplasma-gallisepticum-in-turkeys
#3
Dinidu S Wijesurendra, Anna Kanci, Kelly A Tivendale, Joanne M Devlin, Nadeeka K Wawegama, Barbara Bacci, Amir H Noormohammadi, Philip F Markham, Glenn F Browning
Infection with Mycoplasma gallisepticum induces severe lymphoproliferative lesions in multiple sites along the respiratory tract in chickens and turkeys. These immunopathological responses have been well-characterized in chickens, but have not been studied closely in turkeys. The aim of the study described here was to examine the immune responses of turkeys after live vaccination and infection with M. gallisepticum. In a strain comparison study, the mean log10 antibody titre of birds exposed to an aerosol culture of M...
April 20, 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
#4
R Dijkman, A Feberwee, W J M Landman
A quantitative PCR (qPCR) able to differentiate between field Mycoplasma 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 were assessed using DNA from 194 M. synoviae field samples, three different batches of MS-H vaccine and from 43 samples representing four other avian Mycoplasma species 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...
April 20, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28421832/experimental-induction-of-chicken-aa-amyloidosis-in-white-layer-chickens-by-inoculation-with-inactivated-vaccines
#5
Wazir Ahmad Habibi, Takuya Hirai, Mohammad Hakim Niazmand, Naoko Okumura, Ryoji Yamaguchi
We investigated the amyloidogenic potential of inactivated vaccines and the localized production of serum amyloid A (SAA) at the injection site in white layer chickens. Hens in the treated group were injected intramuscularly three times with high doses of inactivated oil-emulsion Salmonella Enteritidis vaccine and multivalent viral and bacterial inactivated oil-emulsion vaccines at two week intervals. Chickens in the control group did not receive any inoculum. In the treated group, emaciation, and granulomas were present, while several chickens died between 4-6 weeks after the first injection...
April 19, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28421815/cross-protection-conferred-by-immunization-with-a-romph-based-intranasal-fowl-cholera-vaccine
#6
Thanya Varinrak, Pichayanut Poolperm, Takuo Sawada, Nattawooti Sthitmatee
A previous study demonstrated that a recombinant outer membrane protein H (rOmpH)-based intranasal fowl cholera vaccine elicited efficient homologous protection against Pasteurella multocida strain X-73 (A:1) in chickens. The present study aimed to determine the cross protectivity against heterologous P. multocida strains. The rOmpH was purified via electroelution and formulated with two kinds of adjuvants. The vaccine formulations in a total volume of 100 µl were 100 µg rOmpH with 3 µg of Escherichia coli enterotoxin B (LTB) or 10 µg of CpG ODN2007...
April 19, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28421811/characterization-of-ornithobacterium-rhinotracheale-field-isolates-from-hungary
#7
Réka Szabó, Enikő Wehmann, László Makrai, Csaba Nemes, Éva Gyuris, Ákos Thuma, Tibor Magyar
Ornithobacterium rhinotracheale is a widely distributed rod-shaped gram-negative bacterium that infects several avian species including chickens and turkeys. It is associated with respiratory signs, growth retardation, mortality, and reduced egg production thus causing severe economic losses to the poultry industries. In this study, 37 field isolates of O. rhinotracheale, collected from various locations in Hungary between 1997 and 2015, were identified and molecularly characterized by the analysis of partial 16S rRNA gene sequences, enterobacterial repetitive intergenic consensus (ERIC)-PCR and random amplified polymorphic DNA (RAPD) PCR assays with the OPG11, OPH19, and M13 primers...
April 19, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28417679/synergy-or-interference-of-a-h9n2-avian-influenza-virus-with-a-velogenic-newcastle-disease-virus-in-chickens-are-dose-dependent
#8
Francesco Bonfante, Giovanni Cattoli, Sofia Leardini, Angela Salomoni, Eva Mazzetto, Irit Davidson, Ruth Haddas, Calogero Terregino
Field observations indicate that the impact of velogenic Newcastle disease virus (vNDV) is more severe in countries with concomitant circulation of LPAI virus, as is the case in the Middle East, in particular in Israel, where H9N2 and NDV are endemic. In our study, we evaluated how the exposure of chickens to a H9N2 challenge either favors or interferes with a subsequent vNDV infection and its transmission to sentinels. For this purpose, single vNDV and sequential H9/NDV challenges were performed with increasing doses of vNDV (10(1)-10(6) EID50)...
April 18, 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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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/28132523/pigeon-circovirus-infection-in-disqualified-racing-pigeons-from-taiwan
#15
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/28437158/wvpa-xxth-congress-2017
#16
(no author information available yet)
No abstract text is available yet for this article.
June 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28437157/international-meetings-wvpa-matters-announcements
#17
(no author information available yet)
No abstract text is available yet for this article.
June 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28437156/development-of-a-taqman-based-real-time-pcr-assay-for-rapid-and-specific-detection-of-fowl-aviadenovirus-serotype-4
#18
Jianchang Wang, Jinfeng Wang, Ping Chen, Libing Liu, Wanzhe Yuan
Twelve serotypes of fowl aviadenovirus, namely, FAdV-(1-8a and 8b-11), have been identified, among which FAdV-4 is the aetiologic agent of hepatitis hydropericardium syndrome (HHS) in chickens. Outbreaks of HHS have been documented in many countries, causing significant economic losses. Real-time PCR methods described so far in the literature cross-detect different serotypes of FAdVs. In this study, we aimed to develop a TaqMan-based real-time PCR assay for the specific detection of FAdV-4. A pair of primers targeting the hexon gene and a TaqMan probe were designed...
June 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28277781/coligranulomatosis-hj%C3%A3-rre-and-wramby-s-disease-reconsidered
#19
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...
June 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
#20
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...
June 2017: Avian Pathology: Journal of the W.V.P.A
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