THE PARADYSENTERY BACILLI 



259 



This is seen in the following tables, in which bacilli from a number 

 of cases obtained from different sources are tested in sera from animals 

 which have each received a single type of dysentery bacillus: 



TABLE I. Agghtination of bacilli belonging to the three types in the serum of a young goat 

 injected with the bacillus isolated by Shiga, in Japan. 



Dilutions of Serum. 



Source. 1 : 20 

 Type I. Shiga. 



1. Original, Japan Shiga, 4--f 



2. New Haven Duval, 4-4- 



3. Tuckahoe Carey, 4- | 



4. Coney Island Collins, +4- 



5. Mt. Vernon, Case I.-Collins, +4- 



6. " " " n. " 4-4- 



7. " " "III. ' +4- 



Type II. 



8. Original, Mt. Desert Park, + 



9. New York City Goodwin, + 



10. Hospital, New York Collins, + 



11. Foundling Hospital Hiss, + 



12. Mt, Vernon, Case I. Collins, + 



13. " " " II. + + 



Type III. 



14. Original, Manila Flexner, + 



15. Baltimore Duval, -f | 



16. New York City Wollstein, + + 



17. Orange Collins, + 



18. Hiker's Island Goodwin, ++ 



1:100 1:200 1:500 1:2000 1:6000 



4- + 



-f-f 



4-4- 

 4-4- 

 4-4- 



4-4- 

 4-4- 

 4-4- 



4-4- 

 4-4- 

 4-4- 



4-4- 



+-H 



4-1 

 4-1 



The serum of this goat before injection did not agglutinate any of the above bacilli in 1 : 10 dilution. 

 + -f = complete reaction. + = good reaction. | = slight reaction. 



-I- | = very good reaction. = fair reaction. = no reaction. 



TABLE II. Showing agglutination of members of three types in the serum of animals injected 



with bacilli of Type II. 



Source. 

 Type I. Shiga. 



1. Japan Shiga, 



2. New Haven Duval, 



3. Tuckahoe Carey, 



jrypen. 



4. Mt. Desert Park, 



ft. Mt. Vernon Collins, 



6. New York Hiss, 



Type III. 



7. Manila Flexner, 



8. Baltimore Duval, 



9. Hiker's Goodwin, 



Goat injected with No. 4. 



Rabbit injected with No. 6. 



1:20 1:50 1:100 1:500 1:1000 1:20 1:50 1:100 1:500 1:800 



+ + 



+ + 

 +-f 



+ + 



4-4- 



+ 4- 



++ 



4-4- 



The serum of the above animals previous to immunization did not agglutinate any of the above 

 bacilli in a 1 : 20 dilution. 



