Some characteristics of a strain of Theileria mutans (Theiler, 1906) isolated from cattle in the county of Kent, England, and maintained in splenectomized calves.

BROCKLESBY D. W., SELLW~~D S. A. and HARNESS E., 1972. Some characteristics of a strain of Theileria mutans (Theiler, 1906) isolated from cattle in the County of Kent, England and maintained in splenectomized calves. International Journal for Parasitology, 2: 265-271. A strain of T. mutans was isolated from British cattle and maintained by blood inoculation in splenectomized calves. The strain was avirulent but caused a haemolytic anaemia with a tendency towards macrocytosis. Sixteen passages were made with blood taken at or near peak parasitaemia but this did not result in any change in the behaviour or virulence of the parasite. Maximum parasitaemias varied between S/l000 R.B.C. and 131/1OOO R.B.C. and were achieved between the 8th and 31st day after infection. Attempts to transmit the parasite with three tick species were not successful. INDEX