Cause: Paramyxoviruses are single stranded, non-enveloped RNA viruses. PMV types I (NDV), II and III are serologically distinct.

 

Effects: PMV II produces a mild respiratory disease, with sinusitos, elevated mortality, low egg production and reduced fertility and hatchability. PMV III produces a mild respiratory disease with lower egg production and poor shell quality. PMV VI produces a mild respiratory disease and egg production losses.

 

Detailed causes:

Paramyxovirus (PVM) II affects chickens and turkeys; PMV III affects turkeys, pigeons and pisttacine birds; PMV VI affects turkeys. Birds of all ages can be affected. Paramyxovirus are single-stranded, nonenveloped RNA viruses. PMV I (Newcastle disease virus), PMV II and PMV III are all serologically distinct.

 

Mode of transmission

Spread is aerosol as with NDV.

 

Clinical signs:

PMV II produces a mild respiratory disease, sinusitis, elevated mortality, low egg production and reduce fertility and hatchability.

 

PMV III produces a mild respiratory disease with lower egg production and poor egg shell quality.

 

PMV VI produces a mild respiratory disease and egg production losses.

 

Gross lesions

All PMV’s produce mucous in the nasal turbinates, sinuses, trachea and oedematous bronchi, parabronchi and lungs.

 

Diagnosis:

The clinical disease, and gross and microscopic lesions are helpful aids in the diagnosis. Isolation and identification of virus in chicken embryos or cell culture is necessary for a definitive diagnosis.

 

Serological analysis of antibodies against PMV’s using ELISA or hemagglutination inhibition is also helpful.

 

It simulates NDV, IB, Coryza, chronic respiratory disease (CRD), and infectious laryngotracheitis (ILT).

 

Treatment and control:

Prevention

An inactivated vaccine against PMV IV is available for use in turkeys or pigeons only.

 

Treatment

Antibiotics in feed and water for secondary invaders are helpful.

 

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