358 SUMMARY OF CURRENT RESEARCHES RELATING TO 
grow their nucleus loses its definiteness, in the large forms it disappears, 
and this is a symptom of the parasite’s degeneration. 
Haematozoa in Animals.* — Herr W. Danilewsky calls attention to 
the extensive distribution of some Flagellata and Sporozoa in the blood 
of Yertebrata, and more especially to the resemblance between the Haema- 
tozoa of birds and man. In both cases the parasite would seem to 
belong to the same zoological group (genus as well as species), for the 
similarity in structure, in biological characters, and in general appear- 
ance is very great, and besides this the author has been able to demon- 
strate that an acute malarial infection occurs in birds, and that this 
disease is brought about by Cytamoebse, parasitic in the red corpuscles, 
which sporulate in the same way that they do in man (rosette form). 
The author would explain some unimportant differences between the 
Hmmacytozoa of avian and human malaria by taking into consideration 
the modifying effect of the blood, regarding this as a cultivation medium. 
Besides this the virulence of the microbes and the resistance of the 
organism must also be taken into consideration. Taking all the circum- 
stances and appearances together the author is inclined to regard malaria 
infection of Yertebrata as a sporozoosis. 
* Centralbl. f. Bakteriol. u. Parasitenk., xv. (1894) pp. 480-1. 
