S20 BACTERIOLOGY. 



This delicate beaded rod is bacillus tuberculosis. The 

 lancet-shaped diplococcus with the capsule is micrococcus 



Fig. 63. 







Tuberculous sputum stained by Gabbett's method. Tubercle bacilli seen as 

 red rods ; all else is stained blue. 



lanceolatus. The cocci grouped in fours are mioroeoccus 

 tetragenus. 



Inoculation Experiment. — Inoculate into the 

 subcutaneous tissues of a guinea-pig one of the small, 

 white, caseous masses similar to that which has been 

 examined microscopically. If death ensues, it will, in 

 all probability, be the result of one of the three follow- 

 ing forms of infection : 



a. Septicaemia ' resulting from the introduction into 

 the tissues of an organism frequently present in the 

 sputum. It is designated variously as micrococcus of 

 sputum septiceemia, diplococcus pneumonice, pneumo- 

 coccus of Fraukel, meningococcus, streptococcus lan- 

 ceolatus Pasteuri, micrococcus lanceolatus, micrococcus 

 Pasteuri, coccus lanceolatus, bacillus salivarius septicus, 



1 Septicaemia is tliat form of infection in which the blood is the chief 

 field of activity of the organisms. 



