22 
Colorado Experiment Station. 
beat could not be obtained under normal circumstances; no swelling of the 
brisket. Animal became brighter and added flesh until this writing, when 
he is perfectly normal. 
CASE 24.—Two-year-old Hereford steer, one of a bunch of one hun- 
hundred and sixteen steers shipped from Panhandle, Texas, in March, 
1914, to Nathrop, Colorado, altitude seven thousand six hundred and 
ninety-six. On May 1st they were driven to a range between ten thou¬ 
sand and thirteen thousand feet, where they remained until September 
27th. During this time seven had died with what appeared to be brisket 
disease and on September 2 7th six were sick and four were missing. Case 
2 4 had been driven the previous day to an altitude of a little less than 
eight thousand feet, where, owing £o exhaustion he and one other had been 
left, the other sick ones being taken to an altitude of a little less than 
eight thousand feet. On September 2 8th, the brisket and loose tissue of 
the jaw were badly swollen; there was profuse diarrhoea; the animal was 
very weak and grunting; respiration 36; pulse 120 and very weak; heart 
bating tumultously; moist cough; did the following day while being trans¬ 
ported in a wagon to a iower altitude. Two others or this group died 
within the next two weeks in spjite of the fact that they were removed to 
an altitude of eight thousand feet. 
CASE 28.—Seen August 16, 1913, ten miles above Morrison, on Bear 
Creek, altitude seven thousand feet. History—Jersey cow, seven years 
old; taken from Littleton, January 10, 1913, driven to Canfield’s ranch, 
stood the journey well. Canfield thinks the brisket might have been 
slightly swollen at that time. A month later the cow was constipated, 
had desire for salt and drank much water. A nasal discharge was notice¬ 
able. The brisket enlargement partially disappeared for a time; heart 
beating violently. July 15th diarrhoea was present and feces had offen¬ 
sive odor; weakness, anorexia,, malaise, indisposed to move. Symptoms— 
Temperature 102.5; respirations labored; fore feet wide apart; offensive 
diarrhoea; temperature of body evenly distributed; heart beating fast 
and labored; pulse full and hard; jugular on right side was corded, the 
size of a man’s wrist, extending from the bifurcation near angle of jaw 
downward for ten inches; an old scar was found in the region of the 
throat and over the jugular, looked as though it might have been surgical. 
Post Mortem—Cow was destroyed by bullet in head and bleeding; test 
with hemoglobin scale indicated one hundred per cent; edema of brisket 
extreme and not extended to the lower pectoral region; edema not present 
in extremities; great quantities of sera found in thorax and abdomen; 
edema of mesentery and areolar tissue in region of brisket; heart muscles 
flabby and showing some degeneration; right side of heart dilated and no 
excessive accumulation of fluid around the heart; lungs normal save a 
wash-out appearance; spleen normal; liver much enlarged, hard and nut¬ 
meg appearance; blood seemed to coagulate normally; bowel contents 
fluid and nearly empty; a thrombus fully six inches long in jugular vein; 
kidneys appeared slightly congested but otherwise normal. The cow was 
in good flesh when symptoms first appeared and did not show debility, 
fever and disturbances of reflexes, volition, etc., that would be expected 
in case of infection. 
CASE 30.—Yearling, Hereford heifer; weight 500 pounds; altitude 
nine thousand feet; near Hartsel, Colorado. History—One of a bunch of 
southern heifers shipped into South Park on May 13, 1914, and pastured 
at an altitude of about nine thousand feet during the summer. She was 
noticed to be sick about the middle of October when the roundup took 
place. Seen on November 6, 1914, at which time there was a moderate 
swelling of the brisket, a puffiness under the jaw and a very much dis¬ 
tended abdomen. She was thin, weak, had little appetite and a rather 
profuse diarrhoea. 
