Epizootic of western encephalomyelitis virus infection in equines in Alberta in 1965.

This study reveals that an outbreak of equine encephalomyelitis in Alberta, Canada in 1965 was confirmed to be caused by Western Encephalomyelitis virus, as demonstrated through serological findings and virus isolations.

Research Overview

This research aimed to investigate the cause of a widespread disease among horses (equines) in Alberta, Canada back in 1965. The extensive sickness, termed “epizootic”, was characterized by inflammation of the brain and spinal cord, collectively referred to as “encephalomyelitis”. By engaging in advanced serological and virological techniques, it was affirmed that the pathology was due to the Western Encephalomyelitis (WE) virus.

Methodology

• The researchers tested 88 horses affected by the disease and discovered that 63 of them exhibited a significant rise in complement-fixing (CF) antibodies specific for the WE virus.
• The researchers were able to isolate the WE virus from the brains of 5 horses, solidifying the infection source.
• Another level of affirmation came from the fact that homologous antibodies (matching the strain of the isolated virus) were found in 3 of these animals.

Research Findings & Implications

The analysis distinctly provided the first virological evidence that the WE virus could infect horses. This discovery not only confined to a few regions but spread across larger areas in Alberta, including regions further north than previously suspected.

The outcome of this study significantly embellished our knowledge of WE virus distribution. It also emphasized the necessity for continual surveillance and implementation of preventive strategies to curtail the impact of such outbreaks on the equine population in the future. This research also forms the groundwork for parallel studies to comprehend how the WE virus interacts with equines at the disease level, potentially paving the way for innovative treatments or targeted vaccines.