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 (i) 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 and 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. 



' 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. (i) 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. 



