286 
Life history of Eu. evertsi with two hosts :— 
Eggs- 
Hatch on the ground (a variable 
period) 
31 days. 
Larvae. 
Attack a horse (first host), take 
infection, moult, while still 
on the horse, and then 
become 
3-4 da 7 s - 
Nymphs. 
(< a ) Remain on horse and also 
take infection in this stage... 
(b) Drop on to grass, remain 
dormant, and then moult 
16 days. 
and become in 
24 days. 
Adults. 
(a) On grass 
(b) On horse (second host), 
give infection, copulate, 
females suck blood and fall 
to the ground. 
Piroplasmata occur also in the male ass and zebra, 
but whether identical with P. equi remains to be seen. 
6. P. canis .—The cause of £ malignant jaundice’ 
of dogs. Has been recorded from Europe, Africa and 
India, but probably has a much wider distribution. 
The disease takes an acute or chronic course, and may 
occur in a latent form with few symptoms. 
Acute Form .—-Is characterised by (i) a high tem¬ 
perature except in young dogs where the temperature 
may be sub-normal ; (2) Marked constitutional 
disturbance, prostration, anorexia ; (3) As a rule 
haemoglobinuria ; (4) Less frequently icterus ; 
(5) After a day or two intense anaemia, with a pipe-clay 
coloured tongue, pallid gums, and white sclerotics ; 
(6) In very acute cases paresis or paralysis of the hind 
legs. Death in a few days or in the case of very young 
dogs in twenty-four hours. 
