Egyptian fever of cattle

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Abstract
The disease, Egyptian fever of cattle, has been observed at the Serum Institute, Abbassiah, in Cyrenaican and Cyprus cattle, and less frequently in native Egyptian cattle. The responsible Theileria has been determined as T. annulata (Dzchunkowsky & Luhz, 1904), and both natural and experimental transmission has been demonstrated with Hyalomma excavatum Koch 1844, of Delpy (1949b).H. excavatum in Egypt is a three-host tick, which hibernates during the winter months in the walls of buildings in the engorged nymphal and fasting adult stages. Transmission has been effected with nymphae and adults, infected in each case by feeding the preceding stage on reacting or recovered cattle. On no occasion has infection been observed to pass through the egg to the larval stage. Infection can also be transmitted by inoculation of the blood of a reacting animal in which schizonts are demonstrable.

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