Browsing South African National Veterinary Repository by Author "De Vos, A.J."

Browsing South African National Veterinary Repository by Author "De Vos, A.J."

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  • Amicarbalide : a therapeutic agent for anaplasmosis 
    Barrowman, P.R.; Coetzer, J.A.W.; Kellerman, T.S.; De Vos, A.J.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B. (Pretoria : The Government Printer, 1978)
    When administered subcutaneously in 2 equal daily doses at a total dosage rate of 20 mg/kg, amicarbalide was found to be an effective agent for controlling acute infections of Anaplasma marginate and A. centrale in intact ...
  • Babesia bigemina vaccine : comparison of the efficacy and safety of Australian and South African strains under experimental conditions in South Africa 
    De Vos, A.J.; Combrink, M.P.; Bessenger, R.; Steyn, P.J.J.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Jordaan, E.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B. (Published by The Government Printer, Pretoria, 1982)
    A Babesia bigemina vaccine strain (G strain) of reduced virulence was obtained from Australia and tested experimentally for efficacy and virulence. The strain caused mild reactions in 10 animals and afforded good protection ...
  • Cerebral babesiosis in a new-born calf 
    Imes, G.D.; Cullen, J.S.C.; De Vos, A.J.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B. (Published by The Government Printer, Pretoria, 1976)
    A case of intra-uterine transmission of Babesia bovis is reported. The calf was born normally but showed signs of intravascular haemolyse is and nervous involvement 24 h after birth. It died shortly afterwards from cerebral ...
  • Chemotherapy of Theileria parva lawrencei infections in cattle with halofuginone 
    De Vos, A.J.; Roos, J.A.; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1983)
    Halofuginone lactate, given once orally at a dosage rate of 1,2 mg/kg body mass on the 1st, 3rd or 5th days of fever, resulted in the recovery of only 1 out of 5 splenectomized cattle. Three splenectomized animals, treated ...
  • The effect of tick control on the epidemiology of bovine babesiosis 
    De Vos, A.J.; Potgieter, F.T.; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1983)
    The effect of tick control on the infection rates of Babesia bovis and Babesia bigemina are reported for 6 geographical regions in South Africa. Under conditions of poor tick control the situation for B. bovis as one of ...
  • Eimeria chinchillae De Vos & Van der Westhuizen, 1968 and other Eimeria spp. from three South African rodent species 
    De Vos, A.J.; Dobson, Lynne D.; South Africa. Dept. of Agricultural Technical Services; Tustin, R.C.; De Lange, M.; Reinecke, R.K.; Walker, Jane B.; De Kock, V.E. (Pretoria : Government Printer, 1970)
    Eimeria chinchillae De Vos & Van der Westhuizen, 1968, an organism originally described from the chinchilla and subsequently shown to be transmissible to other rodents, was found to occur naturally in Rhabdomys pumilio ...
  • Immunogenicity and pathogenicity of three South African strains of Babesia bovis in Bos indicus cattle 
    De Vos, A.J.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B. (Pretoria : The Government Printer, 1978)
    A strain of Babesia bovis, which has been routinely used in the locally produced babesiosis vaccine for two decades and maintained by needle passage, was of low virulence and therefore safe, but it induced poor protection ...
  • The isolation of Theileria? taurotragi in South Africa 
    De Vos, A.J.; Roos, J.A.; Steyn, P.J.J.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B. (Published by The Government Printer, Pretoria, 1981)
    In 3 out of 4 attempts strains of a Theileria sp. of low virulence were isolated in the laboratory by feeding adult Rhipicephalus appendiculatus collected from the field on susceptible cattle. One of the strains, previously ...
  • Observations on the transmission of Theileria mutans in South Africa 
    De Vos, A.J.; Roos, J.A.; Steyn, P.J.J.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B. (Published by The Government Printer, Pretoria, 1981)
    Four isolates of Theileria mutans obtained from geographically distant parts of South Africa by sub inoculation of infected blood were found to be readily transmitted by the bont tick Amblyomma hebraeum. All attempts to ...
  • Serodiagnosis of bovine besnoitiosis by ELISA and immunofluorescence tests 
    Bigalke, R.D.; Janitschke, K.; De Vos, A.J.; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1984)
    Sera from non-infected cattle and cattle infected with Anaplasma, Babesia, Theileria and Sarcocystis were tested for antibodies to Besnoitia in ELISA and immunofluorescence tests (IFT) with Besnoitia besnoiti of blue ...
  • Studies on a bovine Babesia transmitted by Hyalomma marginatum rufipes Koch, 1844 
    Gray, J.S.; De Vos, A.J.; Steyn, P.J.J.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B. (Published by The Government Printer, Pretoria, 1981)
    A Babesia sp. was recently observed in Hyalomma marginatum rufipes and found to be transmissible to bovines. Further observations were carried out on this parasite and a study made of the morphology of stages in both ...
  • Studies on the host range of Eimeria chinchillae De Vos & Van der Westhuizen, 1968 
    De Vos, A.J.; South Africa. Dept. of Agricultural Technical Services; Tustin, R.C.; De Lange, M.; Reinecke, R.K.; Walker, Jane B.; De Kock, V.E. (Pretoria : Government Printer, 1970)
    A case of an Eimeria sp. with a lack of host specificity is reported. Eimeria chinchillae DeVos & Van der Westhuizen, 1968, originally described from the chinchilla, was successfully transmitted to seven other rodents, ...
  • Theileria? taurotragi : a probable agent of bovine cerebral theileriosis 
    De Vos, A.J.; Bessenger, R.; Banting, L.F.; Steyn, P.J.J.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B. (Published by The Government Printer, Pretoria, 1981)
    A case of bovine cerebral theileriosis was confirmed at autopsy on a farm where 4 animals out of 70 died. All were less than 2 years old and all showed nervous signs. Serologically, no evidence was found of Theileria ...
  • Uterine coccidiosis of the impala caused by Eimeria neitzi spec. nov. 
    McCully, R.M.; Basson, P.A.; De Vos, Valerius; De Vos, A.J.; South Africa. Dept. of Agricultural Technical Services; Tustin, R.C.; De Lange, M.; Reinecke, R.K.; Walker, Jane B.; De Kock, V.E. (Pretoria : Government Printer, 1970)
    Four cases of uterine coccidiosis showing readily-detectable macroscopic lesions were collected over a period of two years during which 451 female impalas [Aepyceros melampus (Lichtenstein, 1812)] were examined post ...
  • Virulence and heterologous strain immunity of South African and Australian Babesia bovis strains with reduced pathogenicity 
    De Vos, A.J.; Bessenger, R.; Fourie, C.G.; Steyn, P.J.J.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Jordaan, E.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B. (Published by The Government Printer, Pretoria, 1982)
    A South African Babesia bovis strain showed loss of virulence after 10 rapid passages in splenectomized calves. The virulence was comparable with that of an attenuated Australian vaccine strain. Vaccination of crossbred ...