Poulvac® Bron A3

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  • A freeze-dried vaccine. A live vaccine Each dose contains infectious bronchitis virus (A3 strain; ≥ 103.0 EID50)

  • For the active immunisation of pullets, breeders, and broilers against infectious bronchitis (IB) disease, providing effective protection against a wide variety of known IB field viruses.

  • Glass vials – 5,000ds each

    Packed in tray of 10 (50,000ds total)

  • This vaccine should be used immediately upon reconstitution.

    • Primary vaccination: 5 to 7 days of age.

    • Repeat vaccination: 30 days of age.

     • Repeat vaccination: 10 to 12 weeks of age.

     Poulvac Bron A3 vaccine is commonly used as the priming vaccination in IB vaccination programs followed by Poulvac Bron Vic S. Husbandry and climatic conditions determine the best age to vaccinate and will vary from farm to farm. The immunity of vaccinated flocks not exposed to field virus wanes and birds can be susceptible to the disease 4 to 5 months after their vaccination.


    Drinking Water Method


    Whenever available clean water containing 2.5 grams of instant skim milk powder per litre should be used as a diluent for reconstitution.

    The vaccine should be prepared immediately before use by tearing the cap off the vial, removing the rubber stopper and resuspending the virus with pre-chilled diluent. After shaking, the reconstituted vaccine is poured into the 3-5 litres of skim milk solution (2.5 grams of instant skim milk per litre of chilled water).


    Vaccination delivery may be via drinking water lines or direct dispensing to drinkers.

    Early morning administration is recommended.

    Eye Drop Method

    Reconstitution Reconstitute the vaccine with Poulvac® Eye Drop Diluent. Poulvac® Eye Drop Diluent is supplied in a plastic bottle which becomes the dropper bottle when the provided dropper cap is fitted.

    Hold the bird with the eye upward and apply 1 drop (0.03 mL) to the eye. Make sure the drop of vaccine spreads over the eye before releasing the bird. It is an important part of successful technique to hold the bird in such a way that the droplet covers the eye surface and does not run off.

    See pack instruction sheet for detailed notes on application and administration.

  • Simultaneous administration of Infectious Laryngotracheitis Vaccine (ILT) and Poulvac Bron A3 is not recommended. ILT should be administered first then followed by Poulvac Bron A3 5 to 6 days later.

  • Only healthy birds should be vaccinated.

    Avoid cold “stress” both before and after vaccination.

    A respiratory “snicker” best heard at night can develop 10 days after vaccination.

    Good husbandry is essential to minimise the development of this reaction especially in cold weather and in flocks concurrently infected with other pathogens eg. Mycoplasma. Electrolyte replacer is recommended where husbandry and climatic conditions make IBA reactions likely. Electrolyte replacer is supplied to the birds for 5 days, usually commencing 4 to 5 days after vaccination.

  • Storage:


    Store at -20°C to -5°C (FREEZE).


    Protect from light.


    Withholding period:
    Zero (0) days



    Read product label prior to use

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    • Poulvac® Bron A3
    • Poulvac® Bron Ingham
    • Poulvac® Bron Vic S
    • Poulvac® Bursa F
    • Poulvac® CVI Vaccine
    • Poulvac® CVI-HVT Vaccine
    • Poulvac® Eyedrop Diluent
    • Poulvac® HVT CF Vaccine
    • Poulvac® i Pabac IV
    • Poulvac® Laryngo A20
    • Poulvac® Laryngo SA2
    • Poulvac® MD-Vac
    • Poulvac® Newcastle iK Vaccine
    • Poulvac® Newcastle V4
    • Poulvac® Sterile Diluent
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