Browsing by Author "Schiemann, B."
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Item Attempted Transmission of Theileria gorgonis, Brocklesby & Vidler 1961, from Blue Wildebeest (Connochaetes taurinus) to Cattle(Tropenmed Parasitol, 1973) Purnell, R.E.; Schiemann, B.; Brown, C.G.; Irvin, A.D.; Ledger, M.A.; Payne, R.C.; Radley, D.E.; Young, A.S.; Immunological Research on Tick-borne Cattle Diseases and Tick Control Project; East African Veterinary Research Organisation, MugugaFour blue wildebeest (Connochaetes taurinus), two from the Serengeti National Park in Tanzania and two from the Athi/Kapiti Plains m Kenya, were splenectomied. Of the two wildebeest from Tanzania, one which had previously had detectable intra-erythrocytic piroplasms of Theileria gorgonis, had an increase in parasitaemia to a peak of 7%, the other, which had previously had no detectable parasites, developed a low-level parasitaemia. The two wildebeest from Kenya had severely exacerbated T. gorgonis infections all in one case a concomitant Anaplasma marginale infection They died of severe anaemia after febrile responses and theilenal parasitaemias in excess of 70%. Attempts to transmit T. gorgonis to spienectomised calves by blood passage and to steer~ via Rhipicephalus appendiculatus ticks failed despite the establishment of the parasite in the ticks. A. marginale, on the other hand, was blood-passaged to two of the splenectomised calves, which were inoculated with blood from the infected wildebeest.Item Attempted Transmission of Theileria Gorgonis, Brocklesby & Vidler 1961, From Blue Wildebeest (Connochaetes Taurinus) to Cattle(1973) Purnell, R.E.; Schiemann, B.; Brown, C.G.D.; Irvin, A.D.; Ledger, M.A.; Payne, R.C.; Young, A.S.; East African Veterinary Research Organization, Muguga, KenyaTwo blue wildebeest (Connochaetes taurinus) from the Serengeti National Park in Tanzania and two from Kenya were splenectomised. Of the two from Tanzania, one that had previously had detectable intra-erythrocytic piroplasms of Theileria gorgonis showed an increase in parasitaemia (percentage of erythrocytes infected) to 7%, and the other, which had had no detectable parasites, developed a low-level parasitaemia. The two animals from Kenya had severely exacerbated infections with T. gorgonis and in one case a concomitant infection with Anaplasma marginale. They developed Theileria parasitaemias of more than 70% and died. Attempts to transmit T. gorgonis to steers by means of adults of Rhipicephalus appendiculatus Neum. that had fed as nymphs on infected wildebeest were unsuccessful, although it was shown that the parasite became established in the ticks. Some 500 ticks were used on each steer.Item Blood Parasites of the Impala (Aepyceros Melampus) in the Serengeti National Park(1973) Irvin, A.D.; Omwoyo, P.; Purnell, R.E.; Peirce, M.A.; Schiemann, B.; East African Veterinary Research Organisation, Muguga, P.O. Kabete, Kenya. Serengeti Research Institute, Tanzania National Parks, P.O. Box 3144, Arusha, TanzaniaThe incidence of parasites was: Theileria 44.7%, Trypanozoon 5.8%, Haematoxenus 2.3% and Borrelia 1.2%. There was no evidence that these parasites were pathogenic to their hosts. Rhipicephalus evertsi ticks collected from these animals showed a salivary gland infection rate of 5.4%. Haematoxenus has not been described previously from impala.Item Pathogenicity for a Buffalo (Syncerus Caffer) Of Allerton-Type Herpes Virus Isolated From a Tanzanian Buffalo(1972) Schiemann, B.; Kalunda, M.A buffalo (Syncerus caffer) was inoculated intravenously and intradermally with a high dose of Allerton-type herpes virus isolated from a sick buffalo during an outbreak of a disease in buffaloes in Serengeti National Park, Tanzania, in 1969. The animal reacted severely and generalized skin nodules as well as oral and nasal lesions were observed. Viraemia was detected and the virus was isolated from swabs and also from ticks which were fed on the animal during the viraemic phase. The buffalo produced neutralizing antibody and recovered after a long illness. It would therefore appear that under certain conditions the Allerton-type herpes virus can be of high pathogenicity for buffaloes.
