350 



BACILLUS PATHOGENIC IN ANIMALS. 



Length of life 

 of various 

 kinds of 

 bacteria when 

 injected into 

 living frogs, 

 at the same 

 time that 

 jequiritine is 

 introduced. 



that numerous bacilli are constantly present in the 

 blood of the infected frogs, as well as in the pathological 

 secretions of warm-blooded animals. Salomonsen, 

 however, was able to demonstrate that we had not here 

 to do with the so-called jequirity bacilli, and that the 

 species of bacteria found in the blood may be varied at 

 will, according as one or other species is intentionally 

 allowed to develop in the jequirity infusion. Salomonsen 

 succeeded in obtaining multiplication of bacillus pro- 

 digiosus of the bacilli of blue milk, &c., in the blood of 

 frogs in the same manner as of the bacilli ordinarily 

 present in jequirity infusion. The reason of this 

 striking preservation and multiplication of bacteria in 

 the interior of the body must be sought for in the action 

 of the jequiritine, for it is only when this substance is 

 at the same time introduced in sufficient amount into 

 the animals that this multiplication of bacteria in the 

 blood takes place. 



Whether the so-called jequirity bacilli are a separate 

 species of bacteria, or whether they are identical with some 

 other well-known saprophyte, perhaps with one of the so- 

 called hay bacilli, cannot as yet be determined from the 

 statements which have been made with regard to their 

 mode of growth and their morphological characters. 



Bacilli causing erysipelas in the ear of rabbits. In sections 

 from an erysipelas of the ear which occurred in a rabbit after 

 injection of softened fseces of mice, Koch found large numbers 

 of thin bacilli, 3 /x. in length, and '3 p.. in thickness, they also 

 formed threads up to 10 p. in length. No experiments were 

 made at that time (1878) as to the infective character and 

 mode of growth of the bacilli. 



Bacillar necrosis of the liver (Ebertli). This disease was 

 only met with on one occasion accidentally in a guinea-pig. 

 In the liver and spleen small greyish-yellow firm nodules 

 were found ; the lower portion of the liver was for the most 

 part of a gelatinous appearance, and in a state of complete 

 necrosis. In the necrotic tissue there were innumerable 

 bacilli which stained by Gram's method, were rounded at the 

 ends, and of an elongated egg-shape ; they often showed the 

 presence of spores, either at their ends or in the middle. 



