SfUDY OP DELAYED OU « LATENT » TUBEKCELOüS INFECTION 609 
GROUP I 
GROUP II 
GROUP III 
CONTROL UN11EATED 
MILK HEATED TO 78° 
MILK. IIEaTED to 92° 
End of lst week. 
• No distinct lé¬ 
sions except sliglit 
swelling at seat of 
inoculation. 
No distinct lé¬ 
sions except sliglit 
swelling at seat of 
inoculation. 
No distinct lé¬ 
sions except sliglit 
swelling at seat of 
inoculation. 
Endof 2nd week. 
Wellmarkedsub- 
cutaneous nodule 
beginning to ulce- 
rate at seat of ino¬ 
culation. 
Distinct swelling 
and induration of 
inguinal ganglia. 
Ditto. 
Ditto. 
End of 3rd week. 
Large subcuta- 
neous indurated 
nodule and dis¬ 
tinct uleer at seat 
of inoculation. 
Superficial ingui¬ 
nal very large and 
indurated. 
No trace of local 
lésion recognisable 
by palpation- 
Doubtful enlar- 
gement of super- 
ticial inguinal gan¬ 
glia. 
No trace of local 
lésion recognisable 
by palpation. 
Doubtful enlar- 
gement of superfi¬ 
cial inguinal gland. 
End of 4th week. 
Ulcération spre- 
ading. 
Superficial ingui¬ 
nal ganglia very 
large and indura¬ 
ted. 
Ditto. 
Ditto. 
End of 5th week 
Ditto. 
Ditto. 
Ditto. 
End of 6th week. 
Animal dead. Ail 
lymphatic ganglia 
with well marked 
tuberculous le - 
sions. Also tuber- 
culosis of spleen, 
liver and lungs. 
Ditto. 
Ditto. 
End of 7th week. 
Ditto. 
Ditto. 
End of 8th week. 
Ditto. 
Ditto. 
+ doubtful sub- 
cutaneous indura¬ 
tion. 
End of 9th week. 
Ditto. 
Ditto. 
End oflOLli week. 
No trace of lo- 
No trace of local 
cal lésion recogni¬ 
sable by palpation. 
Doubtful enlar- 
gement of super 
inguinal ganglia. 
lésion recognisa¬ 
ble by palpation. 
Doubtful enlar- 
gement of super in¬ 
guinal gland. 
42 
