214 PARASITOLOGY. 
Condition Produced.—The disease usually runs a 
rapid and fatal course; the animal does not greatly 
lose in flesh in these acute attacks. The spleen is 
enlarged and contents like blackberry jam; the kid- 
neys dark and congested; the urine port-wine col- 
ored; the fat icteric; the liver congested. An animal 
so affected is unfit for food. 
Symptoms.—The sheep at first show dullness, loss 
of appetite; stay apart from balance of flock; arched 
back; weak; elevation of temperature, pule and 
respiration. Swellings may be noted in the head or 
neck. The duration of the disease is twenty-four 
hours to four days. 
PrropLasMA CANIs (Canis—dog). 
Distribution—Found in Europe and Africa. 
Description—The protozoon is larger than the 
Piroplasma Bovis, when only one is found in a single 
red blood cell; as many as ten or twelve have been 
counted; when many are found they are small, 
rounded and may be irregular in their outline. Their 
amoeboid movement has been noted in the blood 
cells of the fresh specimens. They are noted to 
elongate their bodies, then contract into spherical 
masses. The cells present a swollen appearance 
and are pale in color. After the acute stage of the 
disease has passed, the parasite apparently ceases 
its movements, remains stationary and has a round- 
ed contour. 
Life Cycle—The parasite multiplies in the red 
blood cell. The nucleus of the adult becomes elon- 
gated, then constricted in the center, finally dividing 
into two. The newly formed nuclei pass to the side 
