Seroprevalence of antibodies to Borrelia burgdorferi in a population of horses in central Texas.

This research study investigated the presence of antibodies to the bacterium Borrelia burgdorferi, which causes Lyme disease, in a population of horses in central Texas, showing that such infection currently appears to be quite rare in this region.

Research Objectives and Methodology

• The study aimed to understand the prevalence of Borrelia burgdorferi infection in horses in Central Texas.
• It collated 469 serum samples from horses admitted to the internal medicine service of the Texas Veterinary Medical Center within the span of one year (from Jan 1 to Dec 31, 1990).
• These samples were tested for the presence of antibodies to Borrelia burgdorferi through a method called ELISA (Enzyme-Linked Immunosorbent Assay), which is a test that measures the immune response in the body.

Results of the Study

• Of the 469 samples tested, only one (0.2%) repeatedly showed a positive result, indicating the presence of antibodies to Borrelia burgdorferi.
• However, a confirmatory test using protein immunoblotting, another type of assay test that allows researchers to detect a specific protein in a sample, yielded a negative result, implying no presence of the bacteria.
• Therefore, no definitive evidence of infection was found in the population studied, and the 95% confidence interval provided a possible prevalence rate between 0% and 0.6%.

Conclusion

• Based on these results, the study concluded that the seroprevalence, or the occurrence of individuals who have serum antibodies against Borrelia burgdorferi in a given population, was extremely low.
• This indicates that infection with B. burgdorferi is currently uncommon among horses in central Texas.
• The researchers’ findings provide useful data for veterinarians and can have implications for strategies aimed at preventing and managing Lyme disease in horse populations, particularly in this geographic area.