Here's why:
* Viral nature: EIA is caused by a lentivirus, a type of virus that integrates its genetic material into the host's DNA. This makes it very difficult to eliminate the virus completely.
* Chronic infection: Once a horse is infected, it carries the virus for life. The virus can remain dormant for periods but can reactivate, causing symptoms.
* No effective treatment: While some treatments can manage symptoms and improve a horse's quality of life, there is no known cure for EIA.
What can be done?
* Prevention: The best way to protect horses from EIA is through vaccination and strict biosecurity measures.
* Management: Veterinarians can help manage symptoms and improve the overall health of infected horses.
* Control: Strict regulations exist in many countries to control the spread of EIA, including testing and quarantine measures.
It is important to note that EIA is a serious disease that can have a significant impact on the health and welfare of horses.