472 BACTERIOLOGY. 



preceded by a careful bacteriological analysis of the stools 

 in order to establish a positive diagnosis, requiring two 

 or three days so that the serum treatment was instituted 

 late in the course of the disease. 



Holt points out that the conditions necessary to obtain 

 success in the serum treatment of cases of dysentery are : 

 First, the early use of the serum, before serious lesions 

 have developed or before the patient's general condition 

 has been too profoundly impaired ; second, the serum 

 must be administered in repeated doses, one or two doses 

 a day, and continued for several days in severe cases. 



