Table 6.— Number of trout sera posses sing specific agglutinins 

 to dilutions shown ^ 



Vaccinated 



trout 

 Control 



trout 



IJ 



Total 



No 



Serum sera ^ ^^ . ^. . 



dilutions tested 1:10 1:20 1:^0 1:80 1:160 1:320 agglutinins 



37 

 AG 



Duff, 19A2. 



31 



Table 7. — Reciprocal relations of the R, S and G variants of B. salmonicida 



Absorption 

 antiserum 



Cells 



Cell suspension 



for 



titration 



Dilutions of absorbed serum 

 YxU^ 1:80 1:160 1:320 



Modified from Duff (1939). 



20 



