490 
AUTHOR’S REVIEW. 
THE DEMONSTRATION OF TRYPANOSOMES 
IN CATTLE 
in Kreis Oberwesterwald by means of cultures in Blood-bouillon. 
Berliner Tierdrztliche Wochenschrift, No. 27, pp. 539—540 (1910). 
By KNUTH, RAUCHBAAR AND MORGENSTERN. 
By adopting the method of Martini, in Manila, and Crawley, in 
North America, the authors succeeded in demonstrating the presence of 
Trypanosomes in the blood of 7 out of 25 apparently healthy cattle 
coming from various places in Kreis Oberwesterwald. The examination 
was made by collecting a small quantity of blood aseptically from the 
jugular vein, defibrinating it, and adding it to ordinary sterile beef 
bouillon. The inoculated tubes were kept at room temperature, being 
protected as much as possible against light. On being examined after 
a few days, numerous developmental and agglomeration forms of 
Trypanosomes were found in the tubes. The authors consider the 
assumption justified that animals suffering from a latent Trypanosome 
infection, when attacked by other diseases, such as foot-and-mouth 
disease, are likely to suffer more severely than animals free from Try¬ 
panosomes. Perhaps the apparently higher virulence of certain outbreaks 
of diseases in animals in certain localities may be referred to this cause. 
This method of examination for Trypanosomes may be of use in the 
investigation of certain other animal diseases whose cause remains as 
yet obscure. 
Transmission ex})eriments with the cultural forms of the Trypano¬ 
somes are at present being carried out in the Hygienic Institute of the 
Veterinary School in Berlin. It will be interesting to try and discover 
the mode of infection in nature, and the possible carrier of the disease 
in Germany. 
The results of the investigations will shortly be published in 
extenso. 
