Strict control measures apply to movement of buffalo in South Africa including testing for Theileria parva, the causative
agent of Corridor disease in cattle. The official test is a real-time hybridization PCR assay that amplifies the 18S rRNA V4
hyper-variable region of T. parva, T. sp. (buffalo) and T. sp. (bougasvlei). Mixed infections with the latter organisms affect
diagnostic sensitivity due to PCR suppression. While the incidence of mixed infections in the Corridor disease endemic
region of South Africa is significant, little information is available on the specific distribution and prevalence of T. sp.
(buffalo) and T. sp. (bougasvlei). Specific real-time PCR assays were developed and a total of 1211 samples known to
harbour these parasites were screened. Both parasites are widely distributed in southern Africa and the incidence of mixed
infections with T. parva within the endemic region is similar (25–50%). However, a significant discrepancy exists in
regard to mixed infections of T. sp. (buffalo) and T. sp. (bougasvlei) (10%). Evidence for speciation between T. sp.
(buffalo) and T. sp. (bougasvlei) is supported by phylogenetic analysis of the COI gene, and their designation as different
species. This suggests mutual exclusion of parasites and the possibility of hybrid sterility in cases of mixed infections.
Latif, Abdalla A.; Hove, T.; Kanhai, G.K.; Masaka, S.; Boomker, Jacob Diederik Frederik(Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2001)
Eight cattle immunized with cattle-derived Theileria parva Boleni stabilate together with six susceptible controls were released in Dombawera Game Park on the Highveld of Zimbabwe. This coincided with Rhipicephalus ...
Pienaar, Ronel; Potgieter, Fred T.; Latif, Abdalla A.; Thekisoe, Oriel M.M.; Mans, Ben J. (Barend Johannes)(Cambridge University Press, 2011-02-11)
Buffalo-adapted Theileria parva causes Corridor disease in cattle. Strict control measures therefore apply to the movement
of buffalo in South Africa and include mandatory testing of buffalo for the presence of T. parva. ...
Theileriosis is a tick-borne
disease caused by intracellular protozoa of the genus Theileria.
The most important species in cattle are Theileria annulata and Theileria parva. Both
species transform leucocyte host cells, ...