Range paralysis stance is most commonly associated with which disease in birds?

Range paralysis stance is most commonly associated with which disease in birds?

• A. Marek's Disease
• B. Newcastle Disease
• C. Avian Influenza
• D. Infectious Bronchitis

Answer: (A)

Range paralysis stance points to nervous system involvement causing leg weakness. Marek's disease is caused by a herpesvirus that induces neoplastic T cells which invade peripheral nerves, including those powering the legs. This nerve infiltration leads to hindlimb paralysis and a wide-based, unsteady stance as the bird tries to balance. While other diseases can cause some neuro signs, the characteristic nerve-centric paralysis seen with Marek's disease makes it the best-fitting association for this sign.

Range paralysis stance points to nervous system involvement causing leg weakness. Marek's disease is caused by a herpesvirus that induces neoplastic T cells which invade peripheral nerves, including those powering the legs. This nerve infiltration leads to hindlimb paralysis and a wide-based, unsteady stance as the bird tries to balance. While other diseases can cause some neuro signs, the characteristic nerve-centric paralysis seen with Marek's disease makes it the best-fitting association for this sign.