Pigeon Herpesvirus (PHV) testing

Pathogen overview

Attacks the upper respiratory tract and conjunctiva, causing breathing difficulty and ocular discharge; spreads quickly in densely housed lofts.

Transmission

Spread by respiratory droplets, ocular and nasal secretions and contaminated equipment; latently infected pigeons can reactivate the virus and shed it after stress.

Main impact

Causes upper respiratory inflammation and conjunctivitis, impairing respiratory function and vision and reducing racing condition; secondary infection can worsen the disease and prolong the course.

Why testing matters

Distinguishes herpesvirus infection from other respiratory pathogens, guides antiviral and symptomatic treatment, assesses the carriage rate in the flock, and reduces flock outbreaks under dense housing.

Common symptoms

• ◆ Sneezing, nasal discharge
• ◆ Conjunctivitis, lacrimation
• ◆ Difficulty breathing
• ◆ Depression

Differential diagnosis

Must be differentiated from respiratory pathogens such as Mycoplasma and Newcastle disease; herpesvirus mainly causes conjunctivitis and upper respiratory signs, and its hallmark is reactivation of latent infection after stress.

Incubation period

Incubation period 2–7 days; latently infected pigeons can reactivate and shed virus after stress such as transport or racing.

Diagnostic methods

Collect throat and conjunctival swabs for qPCR detection of viral nucleic acid for confirmation, interpreted together with the upper respiratory and conjunctival signs.

Management and treatment

Treatment is mainly symptomatic and supportive: control secondary bacterial infection, reduce stress and isolate affected birds. Specific medication must be decided by a veterinarian according to the case.

Prevention

Keep the loft well ventilated, control stocking density, isolate affected birds and disinfect regularly.