Diagnosis of equine influenza virus infections in quarantine stations in Australia, 2007.

The research article discusses an incident in August 2007 where several horses in Australia displayed signs of fever and respiratory issues while under post-arrival quarantine. The horses were later diagnosed with equine influenza through serology and PCR tests in two quarantine stations. It was suggested that the origin of the disease was a common shipment of horses from Japan.

Overview of the Situation

• In August 2007, multiple horses in quarantined stations in Australia exhibited symptoms of fever and respiratory disorders. These signs pointed towards potential viral infection, drawing the attention of the station’s officials and vets.
• The existence of the symptoms prompted further investigation towards a possible disease outbreak among the horses.

The Diagnosis

• The horses were subsequently subjected to diagnostic tests to identify the illness. The testing procedures used included serology and PCR (Polymerase Chain Reaction). Serology is a test that investigates the serum of an individual’s blood for evidence of an immune response to a pathogen, while PCR is a technique used to amplify a specific DNA segment.
• Following these tests, it was confirmed that the horses were suffering from an outbreak of equine influenza, a highly contagious virus that affects horses’ respiratory systems.

Tracing the Source

• In tracing the potential source of this outbreak, investigators found a common link between these horses. The evidence suggested that all the affected horses came from a single shipment from Japan. This finding indicated that Japan was the likely origin of the equine influenza virus that infected the quarantined horses.
• This information was crucial, as it subsequently led to stricter controls and measures in importing horses from foreign regions, specifically Japan, to prevent such incidents in the future.