1907 Report of the Government Veterinary Bacteriologist of the Transvaal 1907 - 1908

1907 Report of the Government Veterinary Bacteriologist of the Transvaal 1907 - 1908

 

CONTENTS
Letter of transmittal 1
PART I - INVESTIGATIONS INTO SOUTH AFRICAN DISEASES
By Dr. ARNOLD THEILER, C.M.G., Government Veterinary Bacteriologist.
(a) The immunity of cattle inoculated with Piroplasma mutans 2
(b)The influence of cold on ticks and Piroplasma parvum 10
(c) Further experiments with biliary fever of equines 13
(d) The inoculation of mules with polyvalent virus 24
(e) The loss of virulency of horse-sickness virus in practice 50
(f) On the variability of a particular strain of horse-sickness virus 57
(g) Fever reactions in horses simulating horse-sickness 114
PART II - PHYSICAL-CHEMICAL INVESTIGATIONS INTO SOUTH AFRICAN DISEASES
By Dr. WALTER FREI, Assistant Government Veterinary Bacteriologist
(a) Volume of blood corpuscles 127
(b) Viscosity 129
(c) Surface tension of serum 140
(d) Electric conductivity 150
(e) Comparative physical-chemical research, with special reference to horse-sickness 154
(f) Horse-sickness 191
(g) Piroplasmosis 210

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  • Theiler, Arnold, Sir, 1867-1936; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    Conclusions: 1. The virus Tzaneen has in no instance been virulent for all mules injected; this virulency differs, so to say, from animal to animal; one particular animal seems to influence the virus in such a way that ...
  • Theiler, Arnold, Sir, 1867-1936; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    Resume: The experiments prove that a virus may become inert in practice; this avirulency is due to some foreign matter, inasmuch as inert virus added to virulent sterile virus promptly produces avirulency. It is probable ...
  • Frei, Walter; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    Experiments were carried out to study quantitatively the influence of various organic colloids in different concentrations on the conductivity of the same electrolyte, that is to say, the influence of albumine, globuline, ...
  • Theiler, Arnold, Sir, 1867-1936; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
  • Frei, Walter; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    Experiments were undertaken to find differences by means of various physical methods combined between normal horses, horses suffering from horse-sickness, horses immune and hyperimmune against horse-sickness and serum ...
  • Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    Resume: The surface tension IS a factor of enormous biological importance, especially for the phenomena of haemo- and bacteriolysis, phagocytosis and enzyme reactions. The surface tension of serum of horses suffering ...
  • Theiler, Arnold, Sir, 1867-1936; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    Horses and mules were inoculated against piroplasmosis and it was found that Argentine and Transvaal horses and mules can safely be inoculated against piroplasmosis by using donkey foal blood of the fourth generation and upwards.
  • Frei, Walter; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    Values for the volumes of blood corpuscles of horses, donkeys and sheep are examined.
  • Theiler, Arnold, Sir, 1867-1936; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    Resume: 1. A temperature of 0 C. retards the hatching of Rhipicephalus appendiculatus nymphae into adults. 2. A temperature of 0 C. does not interfere with the development of the parasite within the engorged nymphae. 3. ...
  • Frei, Walter; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    Physical-chemical characteristics of horses such as body temperature, volume of erythrocytes, viscosity of blood, viscosity of serum, specific gravity of serum, conductivity of serum etc. were examined.
  • Viscosity 
    Frei, Walter; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    Viscosity of blood, defibrinated blood, serum and plasma are compared.
  • Theiler, Arnold, Sir, 1867-1936; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    CONCLUSIONS: 1. The exposure of animals immune against redwater in the low veld proved that this immunity protected against the redwater of that veld. 2. Animals immune against heartwater were protected against that ...
  • Frei, Walter; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    RESUME. 1. Piroplasmosis of the horse is a disease with periods also pronounced by physical-chemical alterations of blood and serum. 2. The haemolysis, produced by the intra-globular parasites, has to be considered to ...
  • Theiler, Arnold, Sir, 1867-1936; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    Conclusions: The injection of two-mule Tzaneen virus protected against four-mule Tzaneen virus, but not completely against the exposure virus. The two-mule Tzaneen virus, the four-mule Tzaneen virus, and the exposure virus ...
  • Theiler, Arnold, Sir, 1867-1936; Transvaal Department of Agriculture (Pretoria: Government Printer and Stationery Office, 1909)
    Conclusions: 1. Animals immunised with a polyvalent virus and tested with the same virus show reactions when subsequently retested with the identical virus. 2. When the immunity was tested with constituents of this ...