Infectious bronchitis vaccines derived from IB-QX-like vaccine strains
View Patent ↗The present invention relates to infectious bronchitis (IB) viruses derived from a recently identified genotype of IB virus known as IB-QX, or from viruses that are genetically related to IB-QX, herein referred to as IB-QX-like viruses. The IB viruses of the invention may be live and attenuated or inactivated. Live, attenuated IB viruses of the invention may be produced by serial passaging of an IB-QX-like virus. The IB viruses of the invention are useful for, inter alia, vaccines against IB-QX and IB-QX-like viruses. Heretofore, known vaccine strains of IB viruses have proven insufficient to protect against infectious bronchitis caused by IB-QX and IB-QX-like viruses.
1. An isolated attenuated infectious bronchitis (IB) virus deposited with the ECACC under provisional accession No. 09061004.
2. A vaccine comprising the isolated attenuated infectious bronchitis (IB) virus of claim 1 further comprising a pharmaceutically acceptable carrier.
3. A method for vaccinating a chicken against infectious bronchitis (IB), said method comprising administering the vaccine composition of claim 1 to said chicken.
4. The method of claim 3 further comprising vaccinating against one or more additional infectious agents other than an IB virus.