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Four strains of staphylococci of different phage patterns (two principal and two minor phage types) associated with naturally occurring tenosynovitis were studied for virulence in chickens and tropism for tendon tissue. There were significant differences in virulence between the principal and minor ...
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The phage typing and cultural characteristics of 574 strains of S. aureus of poultry origin in Australia were examined. With the avian phage set of Shimizu (1979) it was possible to type 74.2% of strains. A number of significant variations in the phage typing patterns of Australian strains compared ...
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The effect of breed of chicken on infection with an arthrotropic avian reovirus (strain R2) was studied by oral or footpad inoculation of day-old chicks of the SPF light-hybrid, commercial White Leghorn egg-layer, and commercial Ross I broiler breeds, observed to 12 weeks of age. Although most inocu...
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The lesions and etiologic agents associated with 13 outbreaks of respiratory disease in commercial chickens were investigated. Adenoviruses were isolated from tracheal and lung tissues of affected chickens in all 13 outbreaks. Escherichia coli was isolated from the lung of an occasional bird. The tr...
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The prevalence of reoviruses in commercial chickens with the runting/stunting syndrome, tenosynovitis, and normal chickens was investigated. Reoviruses were isolated from 3-week-old chickens affected with the runting/stunting syndrome and from older chickens with tenosynovitis; viruses were isolated...
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An optimal in situ hybridization protocol is described for the detection of gene expression of a structural protein unique to lampreys, lamprin, in the cartilages of prolarval, metamorphic and adult sea lamprey, Petromyzon marinus. A 156 bp antisense RNA probe labeled with (35)S-UTP was transcribed ...
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A novel in-vivo assay system for mapping and analyzing regulatory signals which promote transcription and expression of viral RNA genomes is described. The system was developed using infectious bursal disease virus (IBDV), a double-stranded RNA virus and Vero cells which are permissive for IBDV, as ...
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Surveillance for avian influenza viruses in wild birds was initiated in Canada in 2005. In 2006, in order to maximize detection of highly pathogenic avian influenza viruses, the sampling protocol used in Canada's Inter-agency Wild Bird Influenza Survey was changed. Instead of collecting a singl...
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As nonenveloped viruses, the aquareoviruses and orthoreoviruses are unusual in their ability to induce cell-cell fusion and syncytium formation. While an extraordinary family of fusion-associated small transmembrane (FAST) proteins is responsible for orthoreovirus syncytiogenesis, the basis for aqua...