466 BACILLUS OF INFLUENZA. 
observed a septiceemic infection as a result of his inoculation ex- 
periments. 
Pfeiffer has found in three cases of bronchopneumonia a pseudo- 
influenza bacillus which closely resembles the bacillus previously de- 
scribed by him as peculiar to that disease. This pseudo-influenza 
bacillus resembles the genuine one in its growth in culture media, 
but is larger and shows a decided inclination to grow out into long 
threads. By these morphological characters, which are said to be 
constant, it may, according to Pteiffer, be readily distinguished. 
