LEVEL, Z\ pH/hr. 
CHOLINESTERASE 
EXPOSURE PERIOD 
0 10 20 30 40 50 60 
EXPERIMENT DAY 
CHART BY DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE 
AMS NEG. 4530-57 (9) 
Figure 1.--Plasma (P) and erythrocyte (E) cholinesterase values 
of monkeys exposed for 7 days in warehouses treated with DDVP 
at 2 (lines 1 and 2) and 10 (lines 3 and ) grams per 1,000 
cubic feet. 
- 12 = 
