TEXAS FEVER. 
107 
quite free from ticks, was somewhat gaunt and had diarrhoea, 
but appeared quite well in a few days. 
In addition to the artificial infestation, these bulls became 
grossly infested with ticks hatched on the pastures. 
As the result of excessive tick-infestation, and lack of proper 
nourishment from dry condition of the pasture, these young 
bulls fell off considerably in flesh, and in September, one of 
them, No. io, developed an acute attack of the fever. The 
bull was found sick on September 30th, and died during the 
day. The post-mortem showed typical lesions of Texas fever. 
FIG. 4. —JERSEY BUEE NO. 7. CAEVED AUGUST, 1897. FROM A GROUP 
INFESTED THREE SEASONS. 
On June 21st, 1899, bull No. 7 was artificially infested for 
the third season with several hundred ticks, and later became 
grossly infested from the pastures and was not free from ticks 
until October 1st. To test the immunity of this animal more 
