190 
The Cure of Piroplasmosis 
forms of parasites occurring in the blood in treated and untreated 
dogs. The result of these observations has been to bring to light 
several interesting facts regarding the life-history of the parasite. The 
new method of enumeration promises to yield useful information, and for 
this reason we propose to continue the study of the parasite with the 
aid of the method. We hope to report at an early date upon our 
results. 
From the commencement of the investigations upon the drug- 
treatment of canine piroplasmosis, it was hoped that, if a remedy 
were found, it would afford us a means of treating piroplasmosis in 
other animals , notably in cattle, sheep and horses. Through the help 
of the Colonial Office and the Department of Agriculture and Fisheries 
we have been placed in a position to test the drugs upon piroplasmosis 
in cattle, and we hope to shortly report upon the results of our investiga¬ 
tions. Piroplasma bigeminum or bovis, as Nuttall and Graham-Smith 
have shown, has a similar mode of multiplication to P. canis, and it is to 
be expected that drugs of a similar character to those affecting the latter 
will prove effective against the bovine parasite. (See note which follows.) 
Incidentally, we may mention that, in one experiment which we have 
tried, Trypanblau exerted no effect whatsoever on the parasite of East 
Coast Fever in cattle. This is not surprising, since the parasite is very 
different from Piroplasma, although most writers still persist in re¬ 
taining it is this genus. For reasons stated elsewhere by Nuttall 
(IX. 1908), this parasite should be named Theileria parva. 
In conclusion we wish to acknowledge our indebtedness to our 
laboratory assistant, Mr B. G. Clarke, for the great help he has given us 
in the prosecution of these investigations, and we also desire to thank 
Messrs Meister, Lucius and Brtining, Hochst a.M., for kindly placing the 
drugs we have used at our disposal. The Soamin was supplied by 
Messrs Burroughs, Wellcome & Co. 
Note. 
With regal’d to Redwater we are in a position to state that 
trypanblau exerts a very prompt effect upon the parasite. The effect 
is precisely similar to that observed in the case of Piroplasma canis. 
Our experiments upon the bovine disease are still in progress, but we 
feel that they are sufficiently advanced to warrant the trial of the 
remedy in the field. We shall report upon our results in a future 
communication. The main results of our present investigations were 
communicated to the Royal Society on June 24th, 1909. 
