Figure 10. Nine-day-old Chicl<s Free of Pullorum Disease. Chicks I and II are males and 

 III is a female. Refer to question 14. 



w 



Figure 11. Nine-day-old, Naturally Infected Pullorum Diseased Chicks. Shortened bodies, 

 pasting of the vents with excreta, droopiness and drowsiness are symptoms manifested by these 

 chicks. Chick III died two days after it was photographed. S. pullorum was isolated from chicks 

 II and III. Chicks I and II are males and III is a female. Refer to question 14. 



Figure 12. Six-weeks-old Chicks Exposed to Pullorum Infection When 72 Hours Old. Weights: 

 No. 1, 115 grams: No. 2, 488 grams: No. 3, 193 grams. Pullorum disease has an influence on 

 the rate, uniformity, and amount of growth. Refer to question 31. 



(15) 



