285 
forms ■(? P. mutans) have been found by one of us in 
cattle in Madras (Plate III), by others in Japan, in 
Dutch East Indies, and in Indo-China (Annam). 
5. P. equi .—Causes biliary fever in the horse. 
It occurs in Europe, Africa, India and no doubt else¬ 
where. The chief signs are (1) Haemoglobinuria ; 
(2) Intense icterus ; (3) Fever ; (4) Paresis of hind 
quarters. The disease takes an acute or chronic course. 
Blood Examination. —Rings, amoeboid, flagellate, 
pear nnd bacillary forms occur. Free forms are rare. 
Laveran considered the frequent occurrence of four 
pear-shaped parasites in a group as characteristic of 
this Piroplasma. Further, in horses that have a 
second attack, peculiar willow-leaf forms are found. 
Fig. 93 . P. equi. Various forms 
Post-mortem .—There is great enlargement of 
the spleen and lymphatic glands. The gut is in a 
state of catarrh. The kidneys anaemic and soft. 
Parasites are very numerous in the spleen. 
Transmission. —(1) By inoculation ; (2) Eu. evertsi 
(the red-leg tick) is a known carrier; larvae and 
nymphs that have fed on infected animals transmit 
in the adult stage. The blood of immune animals 
is infective. 
