Poulvac Marek CVI + HVT Concentrate and Solvent for Suspension for Injection for Chickens

One dose (0.2 intramuscularly or 0.5 subcutaneously) per chicken. The
vaccine is to be administered intramuscularly in one of the leg muscles or
subcutaneously in the neck.
Use within 2 hours of reconstitution.
Dilution of vaccine: Reconstitute each 1,000 doses with 200 ml of diluent.
2,000 dose vials should be reconstituted in 400 ml of diluent. To administer
subcutaneously, dilute 1,000 doses in 500 ml of diluent. Dilution should be
done under sterile conditions with diluent at room temperature. An ampoule
may occasionally explode after it has been taken out of liquid nitrogen so
goggles should be worn.
Preparation of the vaccine shall be planned before the ampoules are taken
from the liquid nitrogen and the exact amount of vaccine ampoules and
amount of diluent needed shall be calculated first. There is no information
available on the number of doses on the ampoules once they are removed
from the cane. Special care has to be taken to ensure that the mix-ups of
ampoules with different number of doses is avoided and the correct diluent is
used.

Revised: December 2025
MA split from NI Expiry following AN: 02965/2025
Take the ampoule of vaccine out of the container of liquid nitrogen into a bowl
containing clean tepid water (temperature 27°C (80°F) and not higher than
37°C (98°F)). Thaw the vaccine concentrate by carefully turning the ampoule,
then remove from the water and dry the ampoule. The thawed vaccine
concentrate must be used immediately.
Break the ampoule and withdraw the total contents carefully into a 10 ml sterile
disposable syringe, using an 18G x 1 and a half inch (1.2 x 40 mm) or larger
gauge needle. Slowly withdraw about 8 ml of diluent into the syringe. Turn the
syringe 5-10 times to mix the contents well. Slowly transfer a small volume of
the mixture into the empty vaccine ampoule in order to remove the last
remnants of the vaccine and withdraw this small amount back into the syringe,
and carefully transfer the entire contents of the syringe into the diluent bottle.
Rotate the bottle about 10 times to mix the contents well. The bottle of diluent
should be kept closed throughout the procedure.
The vaccine is now ready for use.
Administration
Poulvac Marek CVI + HVT may be administered either manually, preferably by
using a multi-dose syringe dose and fitted with a 23G x 1 inch (0.60 x 25 mm)
needle, or by a vaccination machine.
Administer the vaccine intramuscularly into the thigh muscle or subcutaneously
in the neck.
NB During vaccination procedure, rotate the bottle of reconstituted vaccine
solution every 5 minutes to prevent the cells from sedimenting.
Use within 2 hours of reconstitution.