Marek’s Disease Virus Vaccine

Hester’s Rispens CVI 988 vaccine is indicated for the active immunization of healthy chickens and chicken embryos to prevent Marek’s Disease (MD).

Target Species: Healthy chickens, particularly long-lived birds like breeders and layers, which require the broadest protection.
Disease Prevention: Aids in preventing the clinical signs and lesions (tumors) associated with highly virulent Marek’s Disease.
Vaccination Timing:
- In ovo: Administered to 18- to 19-day-old embryonated chicken eggs.
- Day-old chicks: Administered as a single dose at the hatchery.

Subcutaneous (SC) Injection: This is the standard method for 1-day-old chicks. The vaccine (usually 0.2 mL) is injected under the skin at the back of the neck.
In Ovo Injection: The vaccine can be administered directly into 18- to 19-day-old embryonated chicken eggs before they hatch.
Preparation: The vaccine is typically stored in liquid nitrogen and must be thawed and mixed with a specific sterile diluent immediately before use.
Handling: Because it contains live virus, the vaccine must be used immediately after thawing and should be mixed occasionally to maintain a uniform suspension.
Dosage: Administering less than one full dose per bird is not recommended.

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