APPENDIX, 415 



(4) Streptococcus articulorum. — Found in the mucous membrane and tonsils 

 of cases of diphtheria and scarlatina ; colonies grow slowly ; appear as 

 transparent watery greyish drops with delicate feather-like protrusions at 

 the margins ; chains have here and there larger cocci ; slight indications 

 of transverse division ; often kills rabbits and mice with formation of pus 

 in joints in which these streptococci are found ; this occurs specially when 

 cultivations are injected directly into the veins. 



(5) Diplococcus albicans tardissimus. — Grows very slowly on nutrient 

 jelly, the track being only about imm. broad after several weeks ; grows 

 more rapidly on blood serum at the body temperature, when colonies form 

 as greyish-white points ; these have a pecuUar moist appearance and an 

 irregular outline ; identical in form with the gonococcus (seep. 421), but 

 individuals are more adherent and form small masses. 



(6) Streptococcus septicus. — Colonies grow very slowly indeed ; seen as 

 fine points on fourth and fifth days in plate and puncture cultivations ; cocci 

 have a special tendency to form chains or diplococci ; fatal to mice in forty- 

 eight to seventy-two hours, to rabbits in three or four days, when injected 

 into veins ; vessels in various organs plugged with organism, this leading 

 to the formation of purulent or necrotic foci. 



(7) Micrococcus or Diplococcus of Trachoma. (Sattler). — An oi^anism 

 found in the contents of the follicles of the eyelids in cases of acute con- 

 junctivitis met with in Egypt ; in the contracted Xollicles met with in 

 trachoma. It grows on plates in the form of whitish clouds ; in gelatine 

 tubes it grows as pearly white tufts, little beads running along the line of 

 the needle ; later, these become slightly yellow ; on agar-agar, potatoes, 

 and blood serum we have a similar growth on the surface, which is usually 

 somewhat viscid ; grows best at the body temperature ; is a diplococcus, but 

 the line of divjsion is not very distinctly marked ; the only motion that 

 has been noticed is a rotatory, or oscillatory one ; gives rise to trachoma 

 when inoculated into the eyelids of the human subject, but does not effect 

 rabbits. 



(8) Micrococcus of Cattle pneumonia {Micrococcus der Lungenseuche 

 der Kinder). (Poels and Nolen). — This organism grows on plates as sharply 

 circumscribed white rounded colonies with a delicate yellow tinge ; in 

 gelatine tubes it grows very much like Friedlander's pneumonia bacillus, 

 but in place of being white it has a delicate cream colour ; has a similar 

 growth on agar-agar ; on potatoes it forms a moist yellowish layer ; on 

 blood serum it is at first white but gradually assumes the cream colour 

 above mentioned ; this organism, which grows best at about 37° C. , consists 

 of cocci of various sizes of an average diameter of .9/i ; it is single,' or may 

 be arranged in short chains of from two to six cocci ; is usually surrounded 

 by a somewhat deeply stained capsule ; pure cultures introduced into the 

 trachea of rabbits, guinea-pigs, dogs, and cattle produce pneumonia. 



(9) Micrococcus of Mc^titis (Micrococcus der Mastitis der Kiihe). — Obtained 

 by Kitt from the inflamed udder of the cow. On gelatine plates it grows as 

 little opalescent white rounded well-defined Hrops from the size of a pin's 

 head to a lentil ; in gelatine tubes it grows as a white opaque fungus-like 

 mass along the needle track ; on potatoes it occurs as a prominent layer, 

 whitish or dark yellow in colour, which after several days becomes moist 

 and glistening looking ; grows in milk at the temperature of the body, and 

 gives rise to a lactic acid fermentation ; a micrococcus .2/( to .5/1 in diameter, 

 usually in pairs, masses, or chains. 



