PARATYPHOIDBACILLTJS FROM URINE OF A CARRIER 503 



nary test directly from the culture test carried out in a drop of 

 serum on a slide. We therefore immunized a rabbit with the 

 atypical strain and another with the normal strain from the 

 same patient. The agglutination was titrated in the serum of 

 the patient. 



The result of these tests are as follows: 



1. Agglutination test in the patient's serum (kindly recorded 

 by our friend Dr. Kr. Skajaa) : 



Atypical strain 1 : 320 



Typical strain 1 : 320 



After absorption with a typical Para. B strain: 



Atypical strain 1 : 20+ 



Para. B strain 1: 20-+- 



After absorption with the atypical strain: 



Atypical strain 1 : 20+ 



Para. B strain 1 : 80+ 



The serum of the patient thus agglutinates the atypical as 

 well as the typical strain. After absorption the agglutination 

 is abolished or diminished both in case of the atypical and a 

 typical paratyphoid strain. 



2. Agglutination in immunesera from rabbits. 



TESTED STRAINS 



Atypical 

 Typical. 

 Para. B . 



SERUM PRODUCED WITH THE STRAIN 



Atypical 



Normal 



Para. B 



Titer on reading after hours 



400 



800 



1600 



28 



3200 

 3200 

 6400 



After absorption during 24 hours with the three strains atypi- 

 cal, typical and Para. B 16, the sera showed the following titres: 



