236 
THE DRUG TREATMENT OF PIROPLASMOSIS 
IN CATTLE. 
By GEORGE H. F. NUTTALL, M.D., Ph.D., Sc.D., F.R.S., 
Quick Professor of Biology, Cambridge, 
and S. HADWEN, D.Y.Sc. (McGill), 
First Assistant Pathologist, Health of Animals Branch, Department of 
Agriculture, Canada. 
(7 charts.) 
CONTENTS. 
PAGE 
Introduction.236 
History of the strain of Piroplasma bovis used in these experiments . 237 
The cattle used for our experiments, methods of investigation . . 238 
Observations on untreated cattle.239 
Notes regarding P. bovis .239 
Records of Cow X and Heifer 182 . 241, 243 
Records of Control Cows I to IV . . . . . 244-247 
Observations on treated cattle.248 
The effects of Trypanblau upon the Parasites .... 249 
Haematocrit readings ......... 251 
Records of treated Cows 1 to 5 . 252 et seq 
Charts relating to Cows which had haemoglobinuria .... 257 
Summary and Conclusions.265 
Introduction. 
In a previous paper 1 we described experiments upon the curative 
and preventive treatment of canine piroplasmosis by means of try¬ 
panblau and trypan rot and briefly stated that trypanblau exerts similar 
1 Nuttall, G. H. F., and Hadwen, S., (1909). “The successful Drug treatment of 
canine piroplasmosis, together with observations upon the effect of drugs on Piroplasma 
canis .” Parasitology, ii. pp. 156—191, 1 text-figure. 
