MORBID ANATOMY 34 I 



as those still attached to the sterigmata, but in no case were 

 spores detected in the substance of the tissues. 



In many sections, especiallj' those from near the center of 

 the nodules, the mass of mycelium was so dense that the struc- 

 ture of the tissues was obscured. Besides the dense growths 

 resembling actinomycosis already described, other brush-like 

 clusters not unlike them were frequently seen. These differ 

 from the former in being somewhat less compact, and that 

 from their periphery numerous hyphae run out into the sur- 

 rounding tissues, whereas in the actinomycotic form the masses 

 are sharply defined and only here and there a few threads 

 grow out beyond the cluster. Their appearance suggests that 

 they may be actinomycotic forms which have finally overcome 

 the resistance of the tissues. Emphysema is less marked in 

 the neighborhood of the latter. 



The cow was examined carefully for the lesions of tuber- 

 culosis and in one lung some four or five caseous and calcare- 

 ous nodules i era. in diameter were found, in which tubercle 

 bacteria were demonstrated, but no mycelium could be de- 

 tected. In no part of the lung was there coexistence of the 

 two infections. 



The fact that the animal did not react to tuberculin, 

 although tuberculosis was present, is noteworthy and suggests 

 that the mould infection may interfere with the test. It is 

 probable that the tuberculous lesion was arrested in its 

 progress. 



§ 253. Pulmonary mycosis in birds. Mohler and 

 Buckley have recently described a case of this affection in the 

 lung of a flamingo which died at the National Zoological Park 

 in Washington. In this case the bird was very much ema- 

 ciated. The lungs presented lesions suggesting those of tu- 

 berculosis in their general appearance. The other organs 

 ( liver, spleen and kidneys) appeared to be normal. From the 

 lung Aspergillus fumigatus was obtained. [The authors give 

 a full description of the lesions with a historical sketch and 

 results of experiments on the smaller animals.] 



