Browsing by Author "Joyner, L.P."

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East Coast Fever: The Infectivity for Cattle of Infective Particles of Theileria Parva Harvested in Various Substrates
(1973) Cunningham, M.P.; Brown, C.G.D.; Burridge, M.J.; Joyner, L.P.; Purnel, R.E.; East African Veterinary Research Organization, Muguga, P.O. Kabete, Kenya
Female Rhipicephalus appendiculatus ticks infected with Theileria parva were pre-fed on rabbits for 4 days before being removed and restrained on ‘plasticine’. They were then fed for 2-h periods on capillary tubes containing various substrates, the contents of which were subsequently inoculated into East Coast fever-susceptible cattle. Using this technique, precolostral calf serum and Eagle's Minimum Essential Medium, with the addition of Bovine Albumin Powder, were selected as substrates suitable for further laboratory investigation on East Coast fever as they were acceptable to the ticks and supported the viability of the parasites.
The feeding behavior on rabbits and in vitro of the Ixodidtick Rhipicephalus appendiculatus Neumann, 1901
(1968) Joyner, L.P.; Purnell, R.E.
The tick, Rhipicephalus appendiculatus, has been the object of considerable interest in Africa, because it is the vector of several protozoal and viral infections of cattle, sheep, goats and man. Its major importance is as the principal vector of Theileria parva, the causal agent of East Coast Fever of cattle.