Results 241 to 250 of about 23,894 (284)

Induction of chicken interferon by avian infectious bronchitis virus

Research in Veterinary Science, 1978
The ability of nine strains of avian infectious bronchitis virus (IBV) to induce chicken interferon has been investigated using Semliki Forest virus for the tests. The Beaudette, H120 and Connecticut 46 strains induced interferon in the allantoic fluids of embryonated hens' eggs, the highest titre (1 : 30) being associated with Beaudette; but these as ...
H C, Holmes, J H, Darbyshire
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Avian infectious bronchitis virus.

Revue scientifique et technique (International Office of Epizootics), 2001
Infectious bronchitis virus (IBV) is prevalent in all countries with an intensive poultry industry, with the incidence of infection approaching 100% in most locations. Vaccination is only partially successful due to the continual emergence of antigenic variants.
J, Ignjatović, S, Sapats
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Avian Infectious Bronchitis: Virus Distribution in Tissues of Chicks

Avian Diseases, 1966
The virus of infectious bronchitis (IB) multiplies primarily in the respiratory tract; little is known about its presence in other organs. Fabricant and Levine (1) reported the presence of virus in eggs during active infection and for 36 days thereafter. Winterfield and Hitchner (5) isolated IB virus from kidneys.
M S, Hofstad, H W, Yoder
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Attenuation of Avian Infectious Bronchitis Virus by Cold-Adaptation

Avian Diseases, 1991
Avian infectious bronchitis virus (IBV) Arkansas-type DPI strain was passaged 10 times in specific-pathogen-free (SPF) chicken embryos incubated at 28 C and 37 C. Virus grown at 28 C acquired cold-adapted (CA) and temperature-sensitive (TS) characteristics based on more-rapid growth at 28 C and a reduced ability to grown at 41 C, respectively, compared
J, Gelb, R L, Lunt, A L, Metz, P A, Fries   +3 more
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Pathogenicity of Australian Strains of Avian Infectious Bronchitis Virus

Journal of Comparative Pathology, 2002
The pathogenicity of 25 strains of infectious bronchitis virus (IBV) isolated in Australia between 1961 and 1994 was compared in white leghorn specific pathogen-free chicks. Twelve strains were nephropathogenic and 10 respiratory, the other three being of mixed pathogenicity.
J, Ignjatovic, D F, Ashton, R, Reece, P, Scott, P, Hooper   +4 more
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Rapid detection and identification of avian infectious bronchitis virus

Journal of Clinical Microbiology, 1992
A rapid and sensitive method for the detection and unambiguous typing of infectious bronchitis virus (IBV) is described. RNA was isolated from IBV-infected allantoic fluid and was transcribed into cDNA. This cDNA was amplified by the polymerase chain reaction. The polymerase chain reaction products were subsequently analyzed on an agarose gel.
K A, Zwaagstra, B A, van der Zeijst, J G, Kusters   +2 more
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Seroprevalence of Avian Influenza Virus, Infectious Bronchitis Virus, Reovirus, Avian Pneumovirus, Infectious Laryngotracheitis Virus, and Avian Leukosis Virus in Nigerian Poultry

Avian Diseases, 2006
Eight poultry farms in Nigeria, including chickens from nine breeder, 14 broiler, 28 pullet, 11 layer, and three cockerel flocks, were tested for antibody seroprevalence to the following poultry viruses of potential economic importance: infectious bronchitis virus (IBV), avian reovirus, avian pneumovirus (APV), infectious laryngotracheitis virus (ILTV),
Owoade, a A, Ducatez, Mariette, Muller, C P   +2 more
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Morphological Variation among Avian Infections Bronchitis Virus Strains

Research in Veterinary Science, 1974
Twelve strains of infections bronchitis virus examined in the electron microscope showed differences in the morphology of the projections forming the corona. These differences were not related to the virulence or egg passage history of the virus, but showed some correlation with the ability of the vims to elicit a group antibody response.
J W, Harkness, C D, Bracewell
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Chemical Characterization of Avian Infectious Bronchitis Virus Receptor Sites

American Journal of Veterinary Research, 1972
SUMMARY The attachment of avian infectious bronchitis virus (ibv) to chicken embryo kidney (cek) cell monolayers was inhibited by sulfhydryl (SH) compounds such as l-cysteine, reduced glutathione, 1,4-dithiothreitol (dtt), and 2-mercaptoethanol (2-me).
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Morphogenesis of Avian Infectious Bronchitis Virus in Chicken Embryo Fibroblasts

Journal of General Virology, 1968
Avian infectious bronchitis virus is a ribonucleic acid-containing ether-sensitive medium-sized virus lacking direct haemagglutinating activity except under special circumstances (Cunningham, 1963; Biswal, Nazerian & Cunningham, 1966) and has been considered as a possible myxovirus on these bases (Cabasso, 1965).
K, Nazerian, C H, Cunningham
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