88 LABORATORY BACTERIOLOGY 



EXERCISE XXXIV 



BACTERIUM SEPTICAEMIA HEMORRHAGIC^ OR 

 MICROCOCCUS LANCEOLATUS 



129. The first of these organisms is the cause of swine 

 plague and a number of different diseases in animals, while the 

 latter is the cause of lobar pneumonia in man. 



The name Bacillus septicczmicz hemorrhagica was given by 

 Hiippe to the bacillus of swine plague (Smith). This bacte- 

 rium (bacillus) is morphologically and in its cultural characters 

 not distinguishable from the bacterium (bacillus) of rabbit 

 septicaemia (Koch), of fowl cholera (Pasteur), and of Schweine- 

 seuche (Schiitz). It is similar to a species of pathogenic bac- 

 teria found more or less frequently in the upper air passages 

 of nearly all of the domesticated animals. It is very similar 

 also to a pathogenic bacillus found in broncho pneumonia in 

 cattle and an infectious pneumonia in sheep. These organ- 

 isms are also known as the Pasteurellose, i.e. belonging to the 

 genus Pasteurella of Trevison. 



Micrococcus lanceolatus^ is the specific organism of lobar 

 pneumonia in man. It is found in the pneumonic lung tissue 

 and also in the saliva of a certain number of healthy people. 

 In many of its properties this organism resembles very 

 closely the bacterium of swine plague. In studying the two 

 species together there will be good opportunity of comparing 

 them and detecting the differences and similarities existing 

 between them. 



REFERENCES. To swine plague. Smith, Report on swine 

 plague, Bureau of Animal Industry, U. S. Depart, of Agric., 1891. 

 Smith, Zeitschrift fur Hygiene, Bd. X, 1891, S. 480. Smith and 



1 For the history and synonymy of this organism, see article by Pro- 

 fessor Welch in the Johns Hopkins Hospital Bulletin, Vol. Ill, p. 125. 



