364 BACTERIOLOGY. 



serum tubes directly from tuberculous livers and spleens. 

 In the original cultures little difficulty was experienced 

 in cultivating the organism on glycerine-agar, fresh dog- 

 serum, Dorset's egg-medium, potato, and glycerine- 

 bouillon. The general cultural peculiarities observed 

 agreed with those described by Maifucci, Nocard, Straus 

 and Gamaleia, and others. He states that the avian 

 tubercle bacteria as found in the tissues of the fowl 

 resemble quite closely those of the bovine and human 

 varieties in their size and general morphology. The 

 average length of a large number of measurements was 

 2.7 microns. Moore also tested the pathogenesis of 

 the freshly isolated avian tubercle bacteria on fowls, 

 rabbits, guinea-pigs, and pigeons. The results of these 

 inoculations, however, were unsatisfactory, as were also 

 feeding experiments of healthy fowls with human tuber- 

 culous sputum rich in bacteria. 



PSEUDOTUBERCULOSIS. Anatomical lesions very sug- 

 gestive of, though not identical with, those produced by 

 bacillus tuberculosis, have also from time to time been 

 observed in mice, rats, guinea-pigs, rabbits, cats, goats, 

 bovines, hogs, and man. They do not appear to be of a 

 specific nature as regards etiology, for the reason that 

 different authors have described different organisms as 

 the causative agents. These affections are usually classed 

 under the name pseudotuberculosis. 



ACTINOMYCETES. 



The term actinomycetes is restricted to a group of 

 organisms having morphological affinities with the bac- 

 teria on the one hand and the hyphomycetes on the 

 other. They resemble the bacteria in that they occur 

 as homogeneous threads which under artificial cultiva- 



