Table 10 
Results of 1976 SALS Survey 
for SFV 
Facility 
Level 
No. Labs 
No. Workers 
Exposed 
Total 
Exposure 
Experience^ 
(%) 
Avg. Expos, 
per Worker 0 ** 
Overt Lab 
Infection 
Inapparent 
Infection 
A 
9 
73 
1393 (23) 
19.1 
0 
0 
B 
18 
103 
1802 (30) 
17.5 
0 
J(C) 
C 
9 
141 
2545 (42) 
18.0 
0 
0 
D 
2 
13 
273 (5) 
21.0 
0 
0 
E 
0 
0 
0 
TOTAL 
48 
330 
6013 
18.2 
•Exposure experience = (number of laboratory workers exposed to SFV) X (minimum number 
of exposures calculated separately for each laboratory. 
b Average exposure per worker = (Total exposure experience) -5- (number of workers exposed). 
Exposure experience was rated as 1 (if a worker handled SFV once), as 2 (for two to twenty 
times) or as 21 (for greater than twenty times). 
'Hemagglutination inhibition for SFV was positive at 1:10; negative at 1:20. 
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Recombinant DNA Research, Volume 18 
