690 Veterinary Medicine. 



piroplasmosis (Texas fever). The piroplasma however is absent 

 from the blood, while spirilla are present. 



The symptoms resemble those of Texas fever : temperature 99° 

 to 106 F., anorexia, weakness, debihty, jaundice, petechise on 

 the visible mucosae, oppressed breathing under exertion, dulness 

 on percussion of groin, pulmonary areas and the dependent 

 parts of the chest. 



Among the lesions are a deep icteric hue of the fat and white 

 tissues generally ; a flabby gelatinoid appearance of the adipose 

 tissue due to a liquid exudate replacing the fat ; effusion straw- 

 colored or bloody into the pleural, pericardial and peritoneal cavi- 

 ties ; dropsical swellings of the head and dewlap ; petechial spots 

 and more extensive hsemorrhagic patches on the serosse especially ; 

 a firm brown condition of the liver ; bile brownish and viscid ; 

 lymph glands enlarged, softened ; blood contains basophile gran- 

 ules, and distorted, broken down globules (poikilocytosis). 



Bacteriology. Spirillum Theileri. The microorganism is twisted 

 in the form of a corkscrew, or the two ends may meet forming a 

 ring, or again they may cross each other once forming a loop, or a 

 second time forming the letter 8. It is usually attached to a bloOd 

 corpuscle, white or red, or rolled round it. When free it moves 

 with an undulating motion till it reaches another globule. The 

 largest of the spirilla are 20;u, to 30/* by ^ to ^/a. There are very 

 few observed in some cases, and in others as many as six may be 

 detected in a single microscopic field. At intervals they com- 

 pletely disappear to be absent for perhaps ten days and then come 

 in a fresh swarm, in the manner of the spirilla of relapsing fever 

 of man. They can be stained by the common aniline dyes, viz. 

 methylene-blue, fuchsin. 



INTERNAIv INVASIONS BY BACILLUS NECROPHORUS. 



The B. Necrophorus has been successfully inoculated on, or 

 found in pathological conditions in deer, reindeer, horses, asses, 

 hogs, kangaroos, dogs, chickens, pigeons, rabbits, Guineapigs 

 and mice. 



It has been found in nodular masses of necrotic degeneration 

 in the livers of deer, cattle (Mohler, McFadyean) and hogs 



