References
- Butler , M. , Ellaway , W.J. and Hall , T. 1972 . Comparative studies on the infectivity of avian respiratory viruses for eggs, cell cultures and tracheal explants . J. comp. Path. , 82 : 327 – 332 .
- Egan , J.A. and Tannock , G.A. 1978 . A comparative evaluation of chicken embryo tracheal organcultures for the assay of avian infectious bonchitis virus . J. biol. Stand. , 6 : 205 – 210 .
- Emele , J. , Lohr , J.E. and Kosters , J. 1985 . Investigation on the growth of field and vaccine strains of the infectious bronchitis virus of chickens in chick kidney and chick embryo fibroblast cells . Berl. Munchen, Tierarzti. Wschr. , (in preparation)
- Locher , M. , Lohr , J.E. and Kosters , J. 1983 . Vergleichende serologische Untersuchungen von suddeutschen Feldisolaten des Virus der infektiosen Bronchitis der Hühner und von Impfstammen in Trachealkulturen . Berl. Munch. Tierarzti;. Wschr. , 96 : 269 – 274 .
- Lohr , J.E. 1976 . Serologic differences between strains of infectious bronchitis virus from New Zealand, Australia and the United States . Avian Dis. , 20 : 478 – 482 .
- Lohr , J.E. 1977 . Studies on avian infectious bronchitis virus in new zealand I. Serotypes . N.Z. vet. J. , 25 : 48 – 51 .
- Lohr , J.E. , McCausland , LP. and Owen , D.J. 1977 . Studies on avian infectious bronchitis virus in New Zealand. III. Efficacy of an attenuated live infectious bronchitis vaccine of New Zealand origin in broiler birds . N.Z. vet. J. , 25 : 53 – 55 .
- Lohr , J.E. and Locher , M. 1983 . Serological comparison of New Zealand and European strains of infectious bronchitis virus in tracheal organ cultures . N.Z. vet. J. , 31 : 126 – 126 .