BACTERIA IN CROUPOUS PNEUMONIA. 401 
Thirteen cases were examined microscopically, by cultures, and 
by inoculations into susceptible animals ; six cases by microscopical 
examination and experiments on animals; and the remainder only by 
microscopical examination. Four of the cases were complicated 
with purulent otitis, six with pneumonia, three with ulcerative endo- 
carditis. The ‘‘pneumococcus” was found in sixteen of the twenty- 
five cases; in four Streptococcus pyogenes was present; in two 
Diplococcus intracellularis meningitidis of Weichselbaum ; in one 
Friedlander’s bacillus ; in one Newmann and Schiaffer’s motile ba- 
cillus ; in one a small curved bacillus. 
In forty-five cases collected from the literature of the subject by 
Fie. 90. Fia, 91. Fie. 92. 
Fia. 90.—Micrococcus pneumonie croupose from blood of rabbit inoculated with normal human 
saliva (Dr. 8.). x 1,000. 
Fie. 91.—Micrococcus pneumoniz croupose from blood of rabbit inoculated subcutaneously 
with fresh pneumonic sputum from a patient in the seventh day of the disease. > 1,000. 
Fig. 92.—Surface culture of Micrococcus pneumoniz croupose, on nutrient agar, showing the 
development of long chains. x 1,000.1 
Netter this micrococcus was present in twenty-seven, Streptococcus 
pyogenes in six, and the Diplococcus intracellularis meningitidis of 
Weichselbaum in ten. 
Monti (1889), in four cases of cerebro-spinal meningitis, demon- 
strated the presence of the same micrococcus. In three of his cases 
pneumonia was also present. In two Staphylococcus pyogenes aureus 
was associated with the ‘‘ diplococcus pneumoniz.” 
Micrococcus Pneumonice Croupose in Ulcerative Endocar- 
ditis.—Weichselbaum, in a series of twenty-nine cases examined 
(1888), found ‘‘ diplococcus pneumoniz ” in seven. 
Micrococcus Pneumonice Crouposce in Acute Abscesses.—In a 
case of parotitis occurring as a complication of croupous pneumonia 
this micrococcus was obtained from the pus in pure cultures by Testi 
(1889); and in another case in which, as a complication of pneumonia, 
there developed a purulent pleuritis, abscess of the parotid on both 
sides, and multiple subcutaneous abscesses, the pus from all of the 
sources named contained the “‘diplococcus” in great numbers, as 
shown not only by microscopical examination but by inoculation into 
rabbits. 
1The above figures are from Dr. Sternberg’s paper published in the American 
Journal of the Medical Sciences for July and October, 1885. 
26 
