142 BACTERIOLOGY 



Pathogenesis. Subcutaneous and intraperitoneal inoculations of rabbits cause 

 death in 3-14 days; in liver and spleen necrotic spots containing bacilli. 

 Infections per os cause a diphtheritic inflammation of the intestines, etc. 



Habitat. Associated with the above disease. 



51. Bact. Beckii 



Bacillus der Brustseucke des Kaninchens Beck: Zeitsch. f. Hygiene, XV, 1893,363. 

 B. cuniculi-pneumonicus Kruse : Fliigge, Die Mikroorganismen, 1896, 418. 



Morphology. Bacilli like those of fowl cholera ; show polar stain. 



Gelatin colonies. Small, entire, granular, clear, becoming brownish. 



Gelatin stab. Slight growth in depth. 



Potato. At 20° C. no growth. 



Agar slant. Growth porcelain-white — brownish. 



Pathogenesis. Inoculations of rabbits into the lung result in cough, fever, rapid 

 respiration, and death in 3-5 days of pneumonia and pleuritis, with much 

 exudate containing bacilli. Subcutaneous inoculations cause a spreading 

 necrosis and death without general infection. Differentiated from No. 50 

 by growth on potato and pathogenesis. 



Habitat. Associated with lung plague of rabbits. 



52. Bact. dubium Kruse 



Ein neuer fur Thiere path. Mikroorg. aus dem Sputum eines Pneumoniekranken 



Bunzl — Federn: Archiv f. Hygiene, XIX, 1893, 326. 

 B. dubius-pneumonicB Kruse : Fliigge, Die Mikroorganismen, i8g6, 419. 



Morphology. Bacilli short rods, with polar staining ; longer and more slender 



on agar. 

 Gelatin colonies. Slightly spreading. 

 Agar slant. Growth composed of transparent colonies. 

 Potato. No growth. 

 Pathogenesis. Subcutaneous or intraperitoneal inoculation of rabbits, guinea 



pigs, mice, and pigeons cause death in 1-4 days ; septicaemia, local oedema 



— necrosis. 

 Habitat. Isolated from rusty sputum of a pneumonia patient. 



53. Bact. felis (Kruse) 



B. salivarius-sepHcus-felis Fiocca : Annali dell' Instituto d' igiene dell' University 



di Roma, 1892, H. 

 B.felis-septicus Kruse : Fliigge, Die Mikroorganismen, 1896, 423. 



Morphology. Bacilli short rods. Cultures like those of fowl cholera. 

 Milk. Not coagulated. 

 Potato. Growth thin, invisible. 



