A viral infectious disease that results_in inflammation located_in brain of horses and humans, has_material_basis_in Western equine encephalomyelitis virus, which is transmitted_by Culex and transmitted_by Aedes species of mosquitoes. The infection has_symptom fever, has_symptom headache, has_symptom nausea, has_symptom vomiting, has_symptom anorexia, has_symptom malaise, has_symptom altered mental status, and has_symptom weakness.