English Translation, Synonyms, Definitions and Usage Examples of Spanish Word ‘virus de la bronquitis infecciosa aviar’. BRONQUITIS INFECCIOSA AVIAR. Recommended. Creative Insights: Renaldo Lawrence on Elearning. Online Course – LinkedIn Learning. Free Online Library: Genotipificacion de variantes del virus de bronquitis infecciosa aviar en el departamento del Tolima, Colombia.(ORIGINAL) by ” Revista MVZ.
|Published (Last):||20 September 2008|
|PDF File Size:||3.74 Mb|
|ePub File Size:||2.73 Mb|
|Price:||Free* [*Free Regsitration Required]|
J Appl Poult Res. Virulent strains of IBV produce epithelial damage, loss of cilia and hyperplasia. The viral isolation assays employing three successive passes in chicken embryos produced symptoms not unlike those of IBV when infecting adult individuals: Characterization of infectious bronchitis viruses isolated from outbreaks of disease in commercial flocks in Brazil.
Statistical analysis The proportions of the principal histopathological lesions were compared, and a one-way analysis of variance Anova was performed to evaluate the loss of epithelial glands at the trachea, as implemented in the statistical software packages Comprop-1 and Statgraphics Plus 5. Successful viral isolation was confirmed by RT-PCR analysis of clinical samples, which produced amplicons whose relative electrophoretic mobility bp matched that expected for the employed primers Figure 5.
The laboratory diagnosis of IBV requires isolating or directly detecting the virus, although serological techniques can be useful under some circumstances.
Infectious bronchitis virus field vaccination coverage and persistence of Arkansas-type viruses in commercial broilers. At the trachea there was moderate loss of cilia and hyperplasia of the bronchus-associated lymphoid tissue BALT. Significance of interactions between Escherichia coli and respiratory pathogens in layer hen flocks suffering from colibacillosis-associated mortality.
WOA2 – Serotipo de virus de bronquitis infecciosa aviar – Google Patents
La calidad de la materia prima y el alimento terminado. Kind code of ref document: Breadth of protection of the respiratory tract provided by different live-attenuated infectious bronchitis vaccines against challenge with infectious bronchitis viruses of heterologous serotypes.
Histopathological aviad of the epithelia of paranasal sinuses, trachea and bronchia revealed the presence of epithelial erosion, mucous exudate and hyperplasia of mucosa-associated lymphoid tissue.
Infectious bronchitis virus in Asia, Africa, Australia and Latin America – History, current situation and control measures. Nephropathogenic infectious bronchitis in Pennsylvania chickens Accepted in June, Antigenic and S-1 genomic characterization of the Delaware variant serotype of infectious bronchitis virus.
Nephropathogenic IBV pathotypes can cause this symptomatology . Request for preliminary examination filed prior to expiration of 19th month from priority date pct application filed before Identification and analysis of the Georgia 98 serotype, a new serotype of infectious bronchitis virus.
ABSTRACT In order to dissect the histopathological changes produced by the infection of avian infectious bronchitis virus in previously vaccinated egg-laying hens from a poultry farming unit, 35 White Leghorn egg-laying hens that had been in production for 9 to 10 months twenty seven of which had clinical symptoms corresponding to respiratory disease and eight apparently healthy individuals were selected for further study. Epidemiology of infectious bronchitis virus aviqr Belgian broilers: Subepithelial engrossment zones are characterized by edema and infiltration of the lamina, mainly by monocytes and lymphocytes .
Food and Agriculture Organization of the United Aciar Organs for the virological and molecular study Trachea and lung fragments from three and four birds were taken and randomly pooled, per organ, in two groups of four and one of three from 11 birds in total. Experimental Escherichia coli respiratory infection in broilers. Vaccine strain H, used in the immunization program currently implemented in Cuba , was used as positive control.
Some of these variants are indigenous, while others are genetically related to IBV variants in neighboring countries , suggesting that IBV strains in Korea are evolving continuously .
In individuals classified as severe there were glandular cysts with mucous exudation Figure 1. After clinical examination and necropsy, they were classified into apparently healthy, mild, moderate or severe according to the severity of the clinical-pathological process.
WO2001009290A2 – Serotipo de virus de bronquitis infecciosa aviar – Google Patents
Korean J Vet Serv. It was possible to isolate and identify infectious bronchitis coronavirus from the original samples and from samples passaged in chicken embryos. The paranasal sinuses samples were softened by placing them for 21 days in a decalcification solution. Risk of HBV infection is also influenced by other factors, such as complete or partial vaccine coverage failures, lower vaccine efficacy against heterologous strains, presence of immunosuppressive agents, inadequate immunization schedules, improper immunization technique, variations in immunization technique for instance, in the amount, quality and temperature of the water used to dilute the vaccine, or in the inoculated dose ; and the use of vaccine combinations against different agents [50, 51].
The affected eggs are usually deformed, whitish, porous, exhibiting calcareous excrescences or even lacking the shell in rare cases. Histopathological analysis of the respiratory system also revealed changes in bronchi, such as BALT hyperplasia and a catarrhal exudative inflammatory response both in epithelial glands and the bronchial lumen Figures 2E and F.
The continuous appearance and emergence of new serotypes has complicated viral diagnosis and the design of effective control and management programs, as the resulting antigenic variation decreases the cross-protection afforded by vaccine strains against field strains of distantly related genotypes or serotypes . Received in November, Detection of infectious bronchitis virus. In Cuba there are immunization programs against avian infectious bronchitis based on the application of live and inactivated vaccines in breeder and layer flocks, respectively [18, 19].
Gelb Jr et al. Occurrence and significance of infectious bronchitis virus variant strains in egg and broiler production in the Netherlands. These effects predispose the individual to coinfections with opportunistic pathogens, such as Escherichia coli . Vaccine efficacy against Ontario isolates of infectious bronchitis virus. Molecular epidemiology of avian infectious bronchitis in Brazil from to in breeders, broilers, and layers.
Among the anatomopathological characteristics of mild cases of respiratory disease are excessive mucus, which can even become sebaceous —especially in broilers— and pulmonary congestion and opacity, with engrossed air sac walls.