DESCRIPTION OF SIM 



571 



to, if not identical with, Strepto 

 coccus pyogenes bovis(Crookshank) 

 Streptococcus in progressiv 

 tissue necrosis in mice. Koch 

 produced a disease in mice by sub 

 cutaneous injection of putrid blood 

 In tissue sections a chain coccu 

 was found which was similar to 

 Streptococcus pyogenes. 



FIG. 229. STREPTOCOCCUS ix PRO- 

 GRESSIVK Tisst'K XKCHOMS ix Mi< K. 

 ". Necrotic cartilage cells, and (6) 

 chains in masses ; c, isolated chains. 

 (Koch.) 



^Streptococcus in Strangles 

 (Schutz). Cocci forming long 

 chains, which, it is said, do not grow 

 on nutrient gelatine or agar, but 

 form a transparent iridescent cul- 

 ture on blood serum. Cultures in 

 broth produced the disease in horses 

 and mice. Rabbits, guinea-pigs, 

 and pigeons are not aifected. 



Strangles is a disease of the horse, 

 associated with suppuration of the 

 glands of the head and neck, prin- 

 cipally in the sub-maxillary, sub- 

 parotideal, and retro-pharyngeal 

 regions, gchutz found that the pus 

 contains streptococci and produces 

 a fatal disease in mice. 



Streptococcus liquefaciens 

 (Sternberg). Spherical and oval 



ingh 



cocci, -4 to -6 M in 

 pairs and short rha 



Inoculated in the depth of gela- 

 tine liquefaction occurs rapidly in 

 the track of the needle, and in a 

 week the gelatine is comi.l 

 liquefied, slightly opalescent, and a 

 scanty deposit forms at the bo 

 of the tube. 



In the depth of ngar a filament 

 is formed compose 

 crowded colonies. 



On potato a thin and limited 

 dry white layer is formed along the 

 line of inoculation in four to five 

 days. 



They are non-pathogenic. 

 They were isolated from the liver 

 and intestines of fatal cases of 

 yellow fever. 



Streptococcus mirabilis (Ros- 

 cpe and Lunt). Cocci 4 M in .li.tm.. 

 singly, and in long chains. 



The growth on nutrient media is 

 very scanty. 



In broth the growth is composed 

 of a mass of delicate filaments 

 which collect at the bottom of the 

 liquid. 



They were isolated from sewage. 

 Streptococcus of Bonome.- 

 Cocci forming chains They corre- 

 spond in description with 

 coccus pyogenes, but. it is said, 

 they do not grow in gelatin- 

 on blood-serum, and they are said 

 to be distinguished by the characters 

 of the colonies on agar plates. 

 They are pathogenic. 

 Inoculated in rabbits and white 

 mice they produce symptoms 

 similar to those produc 

 oculations of the pneumococcus. 

 Sub-cultures rapidly lose their 

 virulence. 



They were isolated from rusoa 

 of cerebro-spinal menin^ 



Streptococcus of Manneberg 

 Cocci ft in diam., singly, in pairs, 

 M<l :n BU 



noculat. 1 in tin- depth of gela- 

 ine a white filament forms along 

 he track of the needle componed 

 of minute colonies. In about a 

 10 nth the filament is replaced by 

 funnel of semi-liquefied gelati 

 On the surface of agar the 



