Avian Infectious Bronchitis Vaccine, Live, IB 4/91 strain.


It is recommended for vaccination of chickens against Infectious Bronchitis, for both initial vaccination and revaccination.


Is a live, CEO virus vaccine wherein the virus strain is cultivated in SPF eggs. It has been lyophilized (freeze-dried) in vials and sealed under vacuum to preserve stability. It is supplied with or without diluent. The product meets rigid 'Quality Control' standards of Purity, Safety and Potency as per individual monographs of viral vaccines of B.P. (Vet).


Each dose contains Not Less Than 103.5 EID50 IB 4/91 strain, IB Virus.

Vaccination Schedule

This vaccine is recommended for use at 1 day of age or older. A second dose should be given at 2 weeks of age or older. For replacement pullets, a booster vaccination should be given between 16 and 18 weeks of age.

Vaccination Methods
  • Drinking Water Method Drinking water vaccination should be done during the cooler part of the day. Remove any disinfectant or sanitizer from the drinking water for 24 hours, prior to and after vaccination. Rinse all waterers with clean water prior to vaccination. Withhold drinking water for at least one hour prior to vaccination, to allow birds to get thirsty. Mix vaccine in the drinking water according to the schedule mentioned in the pack insert, supplied with the vaccine. Provide ample drinking water space to all the birds. Do not use chlorinated water.
  • Intraocular Method Rehydrate the vaccine with the diluent provided. Place the dropper over the vial containing the rehydrated vaccine. Hold the chick with one eye turned up. Put one drop of vaccine into the open eye and hold until bird swallows.
  • Coarse Spray Method Close all windows, doors, ventilators, etc., and turn off fans. Rehydrate according to the directions of the field sprayer manufacturer. Spray the vaccine to the number of birds as per the number of doses specified on label. Leave the house closed for at least 15 minutes after spraying.

Vaccination Reaction

Respiratory symptoms may be observed following first vaccination depending upon the age and the level of parental immunity in the chicks. While birds are going through the reaction period, keep them comfortable by providing adequate heat and good ventilation.

  • Do not rehydrate vaccine until ready for use
  • Use the sterile diluents supplied with the vaccine only
  • Vaccinate only healthy birds
  • Use entire contents of the vial when first opened
  • Burn all used vials and unused contents
  • Do not vaccinate within 21 days before slaughter
  • Vaccination is contraindicated in birds suffering from Mycoplasma infections, Coccidiosis and heavy worm burden
  • Do not use chemical disinfectants for sterilization
  • Keep vaccine in ice bath during the entire vaccination period
  • Reconstituted vaccine should be used immediately
  • For veterinary use only

Packaging & Storage

This vaccine is lyophilized and packed 10 vials per box. It is available in 200, 500, 1000 and 2000 doses per vial.
It is supplied with or without diluent. Do not freeze. Protect from light.