TEXAS FEVER 
163 
is being employed in immunizing stud and range bulls intended 
for infected territory. 
The work reported herein shows that the employment of 
this method as a purely commercial measure, has given fair 
success notwithstanding the unavoidable fatiguing effects of a 
long railroad journey, and the widely different climatic condi¬ 
tions that must be encountered by cattle shipped from northern 
to southern sections of this country. 
In regard to the mechanical details of this work, it will be 
sufficient to say that the blood is taken from the jugular vein 
of a proper supply animal by means of a sterile canula. The 
vessel for collecting the blood, and all instruments that come 
in contact with it being sterilized, and kept sterile throughout 
the operation. The fibrin is removed by means of a wire whip- 
per to keep the blood in a fluid condition. The inoculation is 
made by means of a properly graduated hypodermic syringe. 
Minute details as to sterilizing the instruments, drawing and 
preparing the blood, and making the injections are unnecessary ; 
as those who are competent to carry on this work have been 
trained in these surgical details. Everyone who undertakes 
inoculation should be familiar with the pathology of this disease, 
for medical treatment will be necessary in some cases, and can¬ 
not be carried out intelligently without a practical knowledge 
of the pathological processes. 
The impression prevails that inoculation against “Texas 
fever,” is as simple and harmless as inoculation against “black¬ 
leg.” On the contrary, the effects are more severe ; some signs 
of illness are expected in all that become properly immunized 
and attention is necessary through the inoculation fever. More¬ 
over, attention must be given throughout the first season of tick 
infestation to prevent fatal relapses especially in the older bulls. 
The history of the several lots of cattle that have been in¬ 
oculated is given below. 
BULLOCK.—IO HEAD OF REGISTERED ABERDEEN ANGUS BULLS. 
The cattle used consisted of ten Aberdeen-Angus bulls, six 
to ten months of age, raised near Wichita, Kansas. 
