Table II .—Exposure tests of aborting cows to determine the degree of immunity resulting from Bacterium abortus infection 
May 17,1924 Immunology of Bovine Infectious Aboriion 615 
Results of uterine 
examination for 
Bad. abortus 
Negative. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Positive. 
Do. 
Do. 
Do. 
Outcome of pregnancy 
1 
Living calf. 
fin 
c 
up 
.op. 
.do_.. 
fin 
c 
'Z 
c 
'Z 
.do... 
Abortion__ 
fin 
Gestation 
period 
Days 
281 
288 
297 
287 
285 
280 
282 
282 
268 
285 
167 
223 
! 
Exposure material 
(fetal-stomach 
contents) 
Amount 
g g«g« S“ 5 g8g88SS888iS388 ,0 giS8888 
<S 
Case No. 
Date of 
exposure 
Nov. 13,1918 
Aug. 20,1918 
Nov. 19,1918 
Aug. 20,1918 
Nov. 19,1918 
Aug. 20,1918 
I Nov. 19,1918 
I Feb. 24,1919 
Mar. 19,1919 
May 23,1919 
Feb. 24,1919 
Mar. 19,1919 
May 23,1919 
Feb. 24,1919 
Mar. 19,1919 
May 23,1919 
Feb. 24,1919 
Mar. 19,1919 
May 23,1919 
Aug. 20,1918 
Nov. 19,1918 
Feb. 24,1919 
Mar. 19,1919 
May 23,1919 
Feb. 24,1919 
Mar. 19,1919 
May 23,1919 
Results of milk ex¬ 
aminations for Bad. 
abortus 
Negative__ 
.do_ _ 
_do_ 
.do.. 
_do_ — i 
_do.. 
_do_ 
op 
Positive_ _ 
.do... 
_do__ 
-do..__ 
Date milk 
was obtained 
for inocula¬ 
tion purposes 
Aug. 8,1918 
Aug. 14,1918 
Aug. 14,1918 
Aug. 14,1918 
Aug. 9,1918 
; Feb. 24,1919 
Feb. 24,1919 
Aug. 9,1918 
Aug. 8,1918 
Feb. 24,1919 
Feb. 24,1919 
Mav 19.1919 
Date of 
breeding 
Feb. 12,1918 
Mar. 22,1918 
May 21,1918 
June 29,1918 
July 17,1918 
Mar. 13,1918 
Feb. 20,1918 
Feb. 20,1918 
Mar. 20,1918 
May 21,1918 
June 2, 1918 
Apr. 13,1918 
Nov. 18,1918 
Jan. 17,1919 
Oct. 10,1918 
Oct. 21,1918 
Mar. 9.1918 
Dec. 18,1918 
June 5,1918 
Sept. 9,1918 
Dec. 21,1918 
Mar. 15,1918 
Apr. 15,1918 
May 13,1918 
June 26,1918 
July 20,1918 
Aug. 9,1918 
Aug. 28,1918 
Nov. 2,1918 
Date of 
previous 
abortion 
Oct. 28,1917 
Nov. 2,1917 
Nov. 19,1917 
Feb. 18,1918 
Nov. 18,1917 
May 13,1917 
Apr. 14,1918 
Dec. 18,1916 
Nov. 2,1917 
Sept. 3,1918 
Mar. 18,1918 
Dec. 1,1917 
No. of animal 
422__ 
407.... 
454.. 
473_! 
316_1 
405_ 
450_ 
317_ 
446_ 
f 1 
1 I 
1 i 
I t 
i t 
1 1 
1 I 
1 i 
1 I 
1 i 
I i 
I i 
1 1 
1 1 
CO o CO 
co *-h 
96037—24t-2 
