Prevalence of agglutinating antibodies to Sarcocystis neurona in raccoons (Procyon lotor) from an urban area of Virginia.

This research study examines the prevalence of raccoons carrying antibodies to Sarcocystis neurona, a disease-causing organism in animals such as horses, in Fairfax County, Virginia.

Objective of the Research

The main aim of the research study was to investigate the prevalence of Sarcocystis neurona, a protozoan parasite, in the raccoon population from Fairfax County, Virginia. Sarcocystis neurona is known to cause severe diseases like Equine protozoal myeloencephalitis (EPM) in horses, with raccoons acting as one of its intermediate hosts.

Methodology of the Research

• The researchers conducted a serological survey over a period of three years.
• They collected samples from a total of 469 raccoons in the area.
• The presence of agglutinating antibodies for S. neurona was tested in these samples. Agglutinating antibodies cause particles to clump together, making them easier to identify.
• The test was designed to identify the antibodies at a dilution of 1:50 or greater, to confirm the presence of antibodies in the raccoon sample.

Findings of the Research

• In a striking result, the study found agglutinating antibodies to S. neurona in 433 out of the 469 raccoons tested. This amounted to an extremely high prevalence rate of 92.3%.
• This means that almost all raccoons in the tested area had been exposed to S. neurona, indicating a high level of infection spread.

Significance of the Study

• The findings of this study are significant because they demonstrate a high prevalence of S. neurona in an urban area, which may pose a risk to other animals that come into close contact with infected raccoons such as horses.
• This can help local authorities in taking appropriate preventive measures to control the spread of this disease among other susceptible animals.