African vultures are held in captivity at Salisbury, Johannesburg, and Durban, and in each place a number of birds showed epileptiform seizures. Of 17 griffon vultures (Gyps africanus and G. coprotheres) in Salisbury, three recovered and 11 died after one or more seizures. Of eight vultures of three other species, one Lappetfaced Vulture (Torgos tracheliotus) recovered and one Whiteheaded Vulture (Trigonoceps occipitalis) died. A variety of diagnostic tests, in particular levels of serum calcium and blood glucose, and histological examination of brains, has so far failed to reveal a cause.
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