tin* spring of 1950. During the spring of 1951 
Dr. Herbert Stoenner and his associates, of 
this laboratory, made an extensive survey for Q 
fever in central and southern Idaho among 
persons engaged in various livestock industries. 
Sixty-six shearers and 70 other persons with 
purl- or full-time employment in the sheep 
indust r\ were bled and the blood samples 
were tested for P. tularensis agglutinins. 
Results of serologic tests of blood samples 
taken in the two surveys are given in table 8. 
Of 140 serum samples from shearers in 
Montana 23, or 16.4 percent, gave complete 
agglutination at a titer of 1:20 or higher. 
Not a single positive at this titer was found in 
the 41 samples from other sheep industry 
workers although several gave low titer re- 
actions, which are probably indicative of past 
infections. 
'Phe results from the Idaho survey are 
comparable to results of the Montana survey. 
Of 66 samples from shearers, 8, or 12 percent, 
were positive at a titer of 1:20 and a few others 
gave partial agglutination at 1:20, which is 
Table 8. Results of serologic tests of blood taken in 
two surveys of sheep industry employees, 1950 and 
1951 
Survey 
Number 
tested 
Results 
Nega- 
tive 
Posit 
Number 
ive 1 
Percent 
Montana, 1950: 
Shearers 
140 
117 
23 
16. 4 
Other.. 
41 
41 
0 
0 
Idaho, 1951: 
Shearers 
66 
58 
8 
12. 1 
Other... 
70 
70 
0 
0 
1 At titer of 1:20 or higher. 
Table 9. Positive serologic tests in serums from sheepshearers — Surveys in Montana, 1950, and 
Idaho, 1951 
Speci- 1 
men 
No. | 
Initials of sheep- 
shearer 
Years 
shearing 
Previous diagnosis suggestive of tularemia 
Complete 44- 
agglutination 
titer at 
dilution: 
Montana, 1950 
2 
L. T._ . ... .. 
37 
None 
1:80 
11 
A. A. W 
4 
None.. ._ _ 
1:20 
14 
C. C. B 
30 
None . _ . . 
1:20 
15 
P. M 
6 
None 
1:80 
16 
L. B 
20 
“Tularemia, 1949” 
1:80 
38 
C. M 
10 
“Typhoid, 1945” . . ... ... 
1:160 
50 
F. B 
24 
“Spotted fever, 1949” 
1:160 
59 
C. K 
30 
“Probablv tularemia, 1920” 
1:20 
60 
J. A 
22 
“Tularemia, 1939”. _ _ _ __ 
1:20 
70 
P. J 
18 
“Tularemia, 1949”. 
1:320 
73 
N. N. N 
23 
“Shearers’ pneumonia, 1948” 
1:40 
75 
C. E. N 
28 
“Ulceroglandular infection, 1930” 
1:40 
85 
A. C. A 
19 
“Ulceroglandular infection, 1938”.. _ _ 
1:40 
95 
K. T 
10 
“Tick fever, 1940” 
1:20 
114 
D. S 
21 
None 
1:20 
125 
J. C. A 
30 
None ... _ 
1:40 
127 
E. D. A 
8 
None 
1:20 
133 
R. F 
5 
None 
1:20 
138 
L. B 
21 
“Ulceroglandular infection, 1939” 
1:40 
140 
C. T 
8 
None 
1:320 
183 
P. J. S 
25 
None 
1:20 
185 
W. F. D 
30 
None .. 
1:20 
187 
I. D 
24 
“Tularemia, 1945”. 
1:40 
Idaho, 1951 
402 
W. A. A 
I , 
80 
404 
R. P. S 
22 
None.. . 1 
160 
439 
L. R 
3 
“Tularemia”. 1 
160 
459 
A. B 
24 
“Pneumonia, 1950” 1 
160 
488 
J. C 
15 
“Suspected tularemia, 1938” 1 
20 
517 
R. R 
40 
520 
G. Y 
8 
Current case(?) . 1 
320 
524 
C. C 
5 
“Tularemia, 1948” 1 
80 
Public Health Monograph No. 28, 1955 
15 
