PRODUCERS OF ABSCESS, CELLULITIS, ETC. 475 
given they are followed by purulent peritonitis, beau- 
tifully formed cocci in groups of four being obtained 
in immense numbers in the exudate. Rabbits and dogs 
are not affected by large doses of a culture subcuta- 
neously or intravenously administered. 
The serum from immunized cases has not been used 
therapeutically in human infection. 
