LOUPING-ILL, 



563 



the disease to the sheep or not, and for this purpose ticks from 

 diseased sheep were introduced into the cultivation vessels 

 containing the mutton broth, and the results were most con- 

 clusive. In a few days the fluid became turbid, and was found 



Fia. 33. 



Blood Cultivation from Diseased Sheep. 



(Drawing by. Dr. Jas. Hunter, 1882.) 



eao^ 



a. Multiple rows of rods or bacterioid segments (pathogenic mould). 

 h. A few rods in a single row. 



c. Mass of zoogloea with micrococci, 



d. A single rod. 



c. Mycelium with spores. 



to contain numerous bacilli or rod-like bacteria, in no respect 

 distinguishable from those got in the fluids from the diseased 

 sheep ; and further, that the peculiar filaments with spores in 

 their interior were also seen (figure 34, c). 



The strawish-coloured mould which soon covered the ticks, 

 when stained, dried, clarified with oil of cloves, and mounted in 

 balsam, presented the appearances seen in figures 34 and 35. 



Now this proved nothing beyond the fact that the organism 

 was in the tick ; but whether the tick received it from the sheep, 

 or the sheep from the tick, was a point yet to be determined, 

 and for this purpose ticks were obtained from the grass and per- 

 fectly healthy sheep, and treated in the same way. The con- 



