204 DISEASES OF DOMESTICATED BIRDS 
Lesions in wild birds. The organs according to Cardamatis, 
show characteristic alterations resembling those caused by malaria in 
man. The blood of sick birds is sometimes watery, less abundant 
than normal, pale, and coagulates slowly. The spleen is colored like 
Fic. 37. Hemoproteus danielewsky in blood of the pigeon under different as- 
pects. 1, 2, red blood corpuscles containing small parasites; 3, red blood 
corpuscle containing a large female parasite; 4, red blood corpuscle contain- 
ing a large male parasite; 5, corpuscle with a female and a male parasite; 
6, parasite after rupture of the corpuscle which had contained it (The nu- 
cleus of the cell is still seen coupled with the parasite); 7, male parasite 
with four flagella; 8, female parasite into which a flagellum is penetrating 
(fecundation) ; 9, a free flagellum. Enlarged 1500 diameters. (Neumann) 
chocolate or darker and is always swollen to twice the normal size. 
This writer found turtle doves and lanners most susceptible. Iturbe 
and Gonzales note that while the hematozoa frequently have no ef- 
fect upon the host, the mortality may reach 90 per cent in Myiozetes 
texensis, Chlorophona prettit and Sycalis flaveola. 
Transmission. Aragdo observes that the natural transmittors of 
H. columbe in Brazil are Lynchia lwicolor and Microlynchia persilla; 
in Algeria, L. maura; in the Transvaal, L. capensis. Direct inocula- 
tion from pigeon to pigeon fails. 
LEUCOCYTOZOA 
Leucocytozoa are blood parasites which so modify the appearance 
of the host cell that the identity of the latter is in controversy. Fan- 
tham inclines to the view that small mononuclear leucocytes are the 
cells invaded. Leucocytozoa have been observed in a large number 
of wild and domesticated birds. Among the latter, fowls, pigeons, 
ducks, ostriches and turkeys are known to be infested. In general 
they are of slight importance as disease producers. 
