References
- Adair , B.M. , McNeilly , F. , McConell , C.D.G. , Todd , D. , Nelson , R.T. and McNulty , M.S. 1991 . Effects of chicken anaemia agent on lymphokine production and lymphocyte transformation in experimentally infected chickens . Avian Diseases , 35 : 783 – 792 .
- Ambali , A.G. and Jones , R.C. 1991 . Effects of trypsin and sodium tauroglycocolate on an enterotropic variant of infectious bronchitis virus . Veterinary Record , 129 : 510 – 511 .
- Boots , A.M.H. , Benaissa‐Trouw , B.J. , Hesselink , W. , Rijke , E. , Schrier , C. and Hensen , E.J. 1992 . Induction of anti‐viral immune responses by immunisation with recombinant‐DNA encoded avian corona virus nucleocapsid protein . Vaccine , 10 : 119 – 124 .
- Cavanagh , D. , Davis , P.J. , Darbyshire , J.H. and Peters , R.W. 1986 . Coronavirus IBV: virus retaining spike glycopolypeptide S2 but not S1 is unable to induce virus neutralising or haemagglutination‐inhibition antibody or induce chicken tracheal protection . Journal of General Virology , 67 : 1435 – 1442 .
- Cook , J.K.A. 1984 . The classification of new serotypes of infectious bronchitis virus isolated from poultry flocks in Britain between 1981 and 1983 . Avian Pathology , 13 : 733 – 741 .
- Cook , J.K.A. , Darbyshire , J.H. and Peters , R.W. 1976 . The use of chicken tracheal organ cultures for the isolation and assay of avian infectious bronchitis virus . Archives of Virology , 50 : 109 – 118 .
- Cook , J.K.A. , Smith , H.W. and Huggins , M.B. 1986 . Infectious bronchitis immunity: its study in chickens experimentally infected with mixtures of infectious bronchitis virus and Escherichia coli . Journal of General Virology , 67 : 1427 – 1434 .
- Darbyshire , J.H. , Rowell , R.G. , Cook , J.K.A. and Peters , R.W. 1979 . Taxonomic studies on strains of avian infectious bronchitis virus using neutralisation tests in tracheal organ cultures . Archives of Virology , 61 : 227 – 238 .
- Dhinakar Raj , G. and Jones , R.C. 1996 . Immunopathogenesis of infection in SPF chicks and commercial broiler chickens of a variant infectious bronchitis virus of economic importance . Avian Pathology , 25 : 481 – 501 .
- Gough , R.E. , Randall , C.J. , Dagless , M. , Alexander , D.J. , Cox , W.J. and Pearson , D. 1992 . A new strain of infectious bronchitis virus infecting domestic fowl in Great Britain . Veterinary Record , 130 : 493 – 494 .
- Hansen , M.B. , Ross , C. and Berg , K. 1990 . A sensitive antiviral neutralisation bioassay for measuring antibodies to interferons . Journal of Immunological Methods , 127 : 241 – 248 .
- Herman , A. , Kappler , J.W. , Marrack , P. and Pullen , A.M. 1991 . Superantigens: mechanisms of T‐cell stimulation and role in immune responses . Annual Review of Immunology , 9 : 745 – 772 .
- Ignjatovic , J. and Galli , L. 1994 . The S1 glycoprotein but not the N or M proteins of avian infectious bronchitis virus induces protection in vaccinated chickens . Archives of Virology , 138 : 117 – 134 .
- Ignjatovic , J. and Galli , L. 1995 . Immune responses to structural proteins of avian infectious bronchitis virus . Avian Pathology , 24 : 313 – 332 .
- Isobe , T. and Lillehoj , H.S. 1993 . Dexamthasone suppresses T‐cell mediated immunity and enhances disease susceptibility to Eimeria mivati infections . Veterinary Immunology and Immunopathology , 39 : 431 – 446 .
- Kant , A. , Koch , G. , van Roozelaar , D.J. , Kusters , J.G. , Poelwijk , F.A.J. and van der Zeijst , B.A.M. 1992 . Location of antigenic sites defined by neutralising monoclonal antibodies on the S1 avian infectious bronchitis virus glycopeptide . Journal of General Virology , 73 : 591 – 596 .
- Kusters , J.G. , Jager , E.J. , Neisters , H.G.M. and van der Zeijst , B.A.M. 1990 . Sequence evidence for RNA recombination in field isolates of avian corona virus infectious bronchitis virus . Vaccine , 8 : 605 – 608 .
- Parsons , D. , Ellis , M.M. , Cavanagh , D. and Cook , J.K.A. 1992 . Characterisation of an infectious bronchitis virus isolated from vaccinated broiler breeder flocks . Veterinary Record , 131 : 408 – 411 .
- Prowse , S.J. and Pallister , J. 1989 . Interferon release as a measure of the T‐cell response to coccidial antigens in chickens . Avian Pathology , 18 : 619 – 630 .
- Smith , H.W. , Cook , J.K.A. and Parsell , Z.E. 1985 . The experimental infection of chickens with mixtures of infectious bronchitis virus and Escherichia coli . Journal of General Virology , 66 : 777 – 786 .
- Wang , L. , Parr , R.L. , King , D.J. and Collisson , E.W. 1995 . A highly conserved epitope on the spike protein of infectious bronchitis virus . Archives of Virology , 140 : 2201 – 2213 .
- Williams , A. , Wang , L. , Sneed , L.W. and Collisson , E.W. 1992 . Comparative analyses of the nucleocapsid genes of several strains of infectious bronchitis virus and other corona viruses . Virus Research , 25 : 213 – 222 .
- Corresponding author.