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

Dauda G Bwala, Solomon Ponman, Neil Duncan, Daniel B R Wandrag, Celia Abolnik
Mycoplasma gallisepticum (MG) is the primary cause of chronic respiratory disease in poultry. We investigated the protective efficacy of the live attenuated ts-11 and 6/85 MG vaccines against a local MG strain, and in order to enhance symptoms and mimic a typical field situation, we co-infected birds with a virulent strain of QX-like infectious bronchitis virus (IBV). Both vaccines showed similar ability to protect infected chickens from clinical signs, although ts-11 performed slightly better. Despite the lower protection against clinical disease, 6/85-vaccinated birds had significantly (P≤0...
February 16, 2018: Avian Pathology: Journal of the W.V.P.A
Barbara Gaußmann, Claudia Hess, Beatrice Grafl, Mercedes Kovacs, Salome Troxler, Beatrix Stessl, Michael Hess, Surya Paudel
The pheno- and genotypic relatedness among Escherichia coli isolates from broilers with and without macroscopic lesions on the femoral head were investigated. In total, 219 isolates obtained from the bone marrow were characterized by serotyping, antimicrobial resistance profiles (AMR), phylogenetic grouping, detection of virulence-associated genes (VAG) and pulsed-field gel electrophoresis (PFGE). Serotyping revealed that 48.4% of the isolates were assigned to one of the three serotypes (O78:K80: 21.0%, O2:K1: 18...
February 16, 2018: Avian Pathology: Journal of the W.V.P.A
Guillaume Croville, Charlotte Foret, Pauline Heuillard, Alexis Senet, Mattias Delpont, Mohammed Mouahid, Mariette F Ducatez, Faouzi Kichou, Jean-Luc Guerin
Respiratory syndromes (RS) are among the most significant pathological conditions in food animals and are caused by complex coactions of pathogens and environmental factors. In poultry, low pathogenic avian Influenza A viruses, metapneumoviruses, infectious bronchitis virus, infectious laryngotracheitis virus, Mycoplasma spp. Escherichia coli and/or Ornithobacterium rhinotracheale (ORT) in turkeys, are considered as key co-infectious agents of respiratory syndromes. Aspergillus sp., Pasteurella multocida, Avibacterium paragallinarum or Chlamydia psittaci may also be involved in respiratory outbreaks...
January 19, 2018: Avian Pathology: Journal of the W.V.P.A
Dieter Liebhart, Michael Hess
No abstract text is available yet for this article.
January 3, 2018: Avian Pathology: Journal of the W.V.P.A
Heping Huangfu, Wenbo Xu, Hongkui Wang, Qing Dong, Hongwei Guo, Yanting Sun, Yunxia Li, Wenwen Gao, Wuqing Wang, Jia Zhang, Jingke Shi, Haochun Pan, Congcong Li, Linkang Wang
To better understand the prevalence of Gallibacterium anatis in different poultry species, a rapid and accurate method was developed to detect G. anatis using a TaqMan fluorescent quantitative polymerase chain reaction (qPCR). Specific primers and a TaqMan probe were designed based on the reference gtxA gene sequence. The qPCR standard curve showed a good linear relationship, and the method showed good reproducibility, sensitivity, and specificity, indicating its suitability for G. anatis identification and quantitative analysis...
December 15, 2017: Avian Pathology: Journal of the W.V.P.A
Lijuan Xu, Zijian Liu, Yang Li, Chao Yin, Yachen Hu, Xiaolei Xie, Qiuchun Li, Xinan Jiao
Salmonella enterica serovar Gallinarum biovar Pullorum (S. Pullorum) is the pathogen of pullorum disease, which leads to severe economic losses in many developing countries. Traditional methods to identify S. enterica have relied on biochemical reactions and serotyping, which are time-consuming with accurate identification if properly carried out. In this study, we developed a rapid polymerase chain reaction (PCR) method targeting the specific gene ipaJ to detect S. Pullorum. Among the 650 S. Pullorum strains isolated from 1962 to 2016 all over China, 644 strains were identified to harbor ipaJ gene in the plasmid pSPI12 accounting to a detection rate of 99...
December 12, 2017: Avian Pathology: Journal of the W.V.P.A
Damer Blake
No abstract text is available yet for this article.
February 2018: Avian Pathology: Journal of the W.V.P.A
(no author information available yet)
No abstract text is available yet for this article.
December 2017: Avian Pathology: Journal of the W.V.P.A
(no author information available yet)
No abstract text is available yet for this article.
December 2017: Avian Pathology: Journal of the W.V.P.A
Eduardo Correa Muniz, Renato Verdi, Joice Aparecida Leão, Alberto Back, Vladimir Pinheiro do Nascimento
Salmonellosis ranks among the major diseases of commercial poultry, and its presence in poultry flocks is responsible for economic losses and risks related to public health. Vaccines are an important tool within integrated programmes to control salmonellosis. The purpose of this study was to assess cross-protection provided by the Poulvac® ST vaccine in the control of Salmonella Heidelberg in experimentally challenged 3- and 21-day-old birds. Eighty birds were identified and separated into four treatments (T1: vaccinated and challenged at 3 days of age, T2: unvaccinated and challenged at 3 days of age, T3: vaccinated and challenged at 21 days of age, and T4: unvaccinated and challenged at 21 days of age)...
December 2017: Avian Pathology: Journal of the W.V.P.A
Michael B Papah, Erin M Brannick, Carl J Schmidt, Behnam Abasht
Wooden Breast Disease (WBD), a myopathy that frequently affects modern broiler chickens, is a disorder that has been associated with significant economic losses in the poultry industry. To examine tissue changes associated with the onset and early pathogenesis of this disorder, a time-series experiment was conducted using chickens from a high-breast-muscle-yield, purebred commercial broiler line. Birds were raised for up to seven weeks, with a subset of birds sampled weekly. Breast muscle tissues were extracted at necropsy and processed for analysis by light microscopy and transmission electron microscopy...
December 2017: Avian Pathology: Journal of the W.V.P.A
Rebecca Knab, Henning Petersen, Silke Rautenschlein, Arne Jung
Despite the importance of Bordetella avium (BA) as a respiratory pathogen of young turkeys, no infection model for the evaluation of BA-vaccine efficacy is available. The objective of this study was to evaluate the influence of route and dose of infection on the establishment of a BA-challenge model. In our first experiment, 28-day-old turkeys were either inoculated oculonasally with 10(5), 10(7) or 10(9) colony forming units (CFU) of BA per animal or exposed to BA by aerosol with 10(5)-10(8) CFU/m(3). The respiratory tract of all inoculated animals was BA-colonised, which was confirmed by choanal swabs and samples of trachea and lung, showing the highest prevalence in the aerosol inoculated group...
November 22, 2017: Avian Pathology: Journal of the W.V.P.A
Hafez M Hafez, Aly M Fadly, Yehia Mo Saif, Youssef Ibrahim
No abstract text is available yet for this article.
November 16, 2017: Avian Pathology: Journal of the W.V.P.A
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 the control group...
November 15, 2017: Avian Pathology: Journal of the W.V.P.A
Abdelfattah H Eladl, Hamed R Hamed, Reham A El-Shafei
This study was carried out on six laying hen farms, three mite-infested and three 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 on chicken health and production; (iii) efficacy of deltamethrin (DMT) on treatment of mite infestation and (iv) residues of DMT in eggs and meat. The results showed that 12 mite species were detected in the mite-infested farms, this is the first record in Egypt, and that Dermanyssus gallinae was the highest identified species from 295 (40...
November 9, 2017: Avian Pathology: Journal of the W.V.P.A
Dongchao Zhang, Yuqing Long, Meng Li, Jianfang Gong, Xiaohui Li, Jing Lin, Jiali Meng, Keke Gao, Ruili Zhao, Tianming Jin
Avian infectious bronchitis (IB) caused by the infectious bronchitis virus (IBV) and mycoplasmosis caused by Mycoplasma gallisepticum (MG) are two major respiratory diseases in chickens that have resulted in severe economic losses in the poultry industry. We constructed a recombinant adenovirus that simultaneously expresses the S1 spike glycoprotein of IBV and the TM-1 protein of MG (pBH-S1-TM-1-EGFP). For comparison, we constructed two recombinant adenoviruses (pBH-S1-EGFP and pBH-TM-1-EGFP) that express either the S1 spike glycoprotein or the TM-1 protein alone...
November 8, 2017: Avian Pathology: Journal of the W.V.P.A
Seyed Ahmad Madani, Fatemeh Arabkhazaeli, Elyas Shakeri, Sedigheh Nabian
Coccidian parasites especially Isospora are prevalent parasites in Passeriformes. Isosporan oocysts from common mynahs (Acridotheres tristis) are incompletely described. Detailed knowledge on biology, prevalence, pathogenesis and treatment of avian isosporiasis are scant. In this study isosporan oocysts isolated from common mynahs were morphologically and molecularly characterized. The medication efficiencies of diclazuril and sulfadiazine-trimethoprim in isosporiasis in naturally infected mynahs were evaluated...
November 8, 2017: Avian Pathology: Journal of the W.V.P.A
Najmeh Mosleh, Tahoora Shomali, Fahimeh Nematollahi, Zahra Ghahramani, Mohammad Saeid Ahrari Khafi, Fatemeh Namazi
This study evaluates the effect of different periods of chronic heat stress (CHS) on selected bone and serum parameters of broilers with or without vitamin C administration. Ninety 23 day old-chickens were randomly allocated into 7 groups: 1. control, 2. short term CHS (5 days), 3. short term CHS + vitamin C (12 g/100L drinking water of a 50% product) 4. medium term CHS (10 days), 5. medium term CHS + vitamin C, 6. long term CHS (20 days) and 7. long term CHS + vitamin C. In heat stressed groups the temperature was increased to 39±1°C for 8h/day...
November 6, 2017: Avian Pathology: Journal of the W.V.P.A
Anna Schachner, Miguel Matos, Beatrice Grafl, Michael Hess
The stand-alone pathogenicity of fowl adenoviruses (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 mainly in Asia besides Arabian and Latin American countries, and geographically more disseminated outbreaks of inclusion body hepatitis. Finally, the appearance of FAdV-induced gizzard erosion (AGE) in Asia and Europe completed the range of diseases...
October 25, 2017: Avian Pathology: Journal of the W.V.P.A
Vivek Pande, Andrea R McWhorter, Kapil K Chousalkar
This study evaluated the antibacterial activity of commercially available organic acid water additives against Salmonella enterica isolates and examined the susceptibility of Salmonella Typhimurium biofilms to these products. Three commercial organic acid products (A, B, and C) were evaluated for minimum inhibitory and bactericidal concentrations against isolates of S. enterica serovars. Three and five day old S. Typhimurium biofilms were formed at 22 ± 2°C using MBEC™ assay system and exposed for 30 and 90 min at 0...
October 23, 2017: Avian Pathology: Journal of the W.V.P.A
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