(Undated)  --  Two animals in South Carolina are dead as a result of a mosquito-borne illness.  A state veterinarian confirms a Darlington County horse and a miniature donkey in Horry county have recently died.  Officials blame Eastern Equine Encephalitis, which has also been known to make humans sick.  The illness killed 48 animals in South Carolina last year, more than any other state in the nation.