What must be done with an equine that tests positive for Equine Infectious Anemia in terms of transport?

An equine that tests positive for Equine Infectious Anemia (EIA) poses a significant risk to other horses because the disease is highly contagious and can be transmitted through biting insects or through contaminated equipment. Therefore, strict regulations are in place to manage the transport of such animals to prevent the spread of the disease.

The correct answer states that no exposed equines shall leave the premises until they are released. This is crucial for biosecurity reasons; keeping potentially infected equines on the premises helps to ensure that they do not interact with healthy horses, thereby significantly reducing the risk of an outbreak. Infected animals must be quarantined and closely monitored, and they can only be moved under specific conditions set by veterinarians or under state regulations to ensure that other equines are safeguarded from the disease.

Other choices do not align with the standard procedures for managing a positive EIA case and might contribute to spreading the disease, contrary to public health and animal welfare guidelines.