422 INFECTIVE DISEASES. 



practice of veterinary surgeons were published. They not only 

 deserve especial mention, but as this form of the disease appears to 

 be so seldom recognised, they will be given in detail. 



Plug described a case in the lungs. The cow had been out of 

 health for four weeks, did not eat, and had a cough, and two days 

 previous to the visit had become rapidly worse. Schmidt found 

 dyspnoea with abdominal respiration ; the nostrils were dilated, the 

 head protruded, and the mouth kept open. There was dulness on 

 percussion, and crepitation. The animal was killed, and the lungs, 

 which alone were diseased, were sent to Plug. The pleura on exami- 

 nation was normal, but beneath it were numbers of miliary 

 tubercles, many equal in size to a pin's head. On section the lung 

 had a granular appearance from the presence of countless numbers 

 of minute deposits, which all had the appearance of grey tubercles ; 

 in none was there any central softening. They were present in 

 enormous numbers around the bronchi, and in the vessels of the 

 interlobular tissue. Microscopical examination showed, in the middle 

 of most of these nodules, the presence of greenish-yellow, radiating 

 bodies, which under a high power appeared to be undoubtedly 

 actinomycotic granules. In many there were only rudimentary fungi 

 consisting of four or five clubs ; there was only one rosette in each 

 tubercle. The fungus was surrounded by round cells and fibrous 

 tissue. Larger nodules resulted from the agglomeration of several 

 tubercles, or from diffuse infiltration of round cells in the neighbour- 

 hood of a tubercle. 



Hirik met with a somewhat similar case. A ten-j^ear-old cow 

 was slaughtered, and in the middle lobe of the right lung there were 

 yellowish nodules about the size of a pea, scattered over an area 

 the size of the palm of the hand. These nodules were not at 

 first sight distinguishable from ordinary tubercles, but on closer 

 inspection they appeared to be somewhat different, and could be 

 easily shelled out from the thickened lung tissue. On making a 

 section, pus welled up at several points, and contained yellowish, 

 calcareous particles. These particles, on microscopical examination, 

 were found to be strongly calcified tufts of the actinomyces embedded 

 in granulation cells. Addition of hydrochloric acid dissolved the 

 calcareous matter, but had no action on the fungus. 



Pusch described a third case. The lungs of a cow, which had 

 been killed on suspicion of having pleuro-pneumonia, were sent for 

 examination. The front lobe of the left lung was collapsed and 

 firm, the pleura was thickened and opaque ; the larger bronchi were 

 enlarged, filled with pus, and their walls thickened. In the posterior 



