



Figure 18. The^Whole Blood Agglutination Test. 

 The'mixtures in the squares on the left show a negative_reaction, and the mixtures on the right 

 a' positive reaction. Refer to question 40. 



•.■■afffnri 



Figure 19. Testing of birds in the poultrylhouse with the stained antigen whole blood test. 

 Refer to question 40. 



(19) 



