What is the mortality range for horses infected with Eastern Equine Encephalitis?

What is the mortality range for horses infected with Eastern Equine Encephalitis?

• A. 50-60%
• B. 60-75%
• C. 90-95%
• D. 20-30%

Answer: (C)

Eastern Equine Encephalitis inflicts severe brain inflammation in horses, and once clinical disease appears, the outcome is dominated by death. The mortality range around 90-95% reflects how lethal the virus is in affected animals, so only a small number of horses survive—often with lasting neurologic problems. Vaccination and mosquito control are crucial preventive measures because the disease progresses rapidly and there’s no highly effective cure once it develops. The other ranges underestimate how deadly the infection is, which is why this 90-95% range is the best match.

Eastern Equine Encephalitis inflicts severe brain inflammation in horses, and once clinical disease appears, the outcome is dominated by death. The mortality range around 90-95% reflects how lethal the virus is in affected animals, so only a small number of horses survive—often with lasting neurologic problems. Vaccination and mosquito control are crucial preventive measures because the disease progresses rapidly and there’s no highly effective cure once it develops. The other ranges underestimate how deadly the infection is, which is why this 90-95% range is the best match.