300 APPLIED BACTERIOLOGY 



of which break up into a number of sickle or crescent-like 

 bodies. 



The various divisions of the Protozoa are known as Plas- 

 modia, Goccidii, Psorosperma, Amoeba, etc. 



The parasite occurring in the blood in malaria, known as 

 the Plasmodium malarice, has already been described (see 

 p. 273, et seq.). 



Protozoa have been described by many observers as 

 occurring in carcinoma, sarcoma, in the form of ' eczema ' 

 of the nipple known as Paget's disease ; also in other 

 pathological and morbid conditions of the human and 

 animal subject. 



Flagellated monads have also been described by various 

 investigators as occurring in the blood of apparently healthy 

 rats, fish, etc. 



Much work has yet to be done to determine the exact 

 part played by the Protozoa in disease. For detailed in- 

 formation, we would refer the student to the original 

 communications . on this subject in the home and foreign 

 medical journals. 



Coccidium oviforme. — A very fatal disease in young rabbits, 

 due to a parasite known as the Coccidium, oviforme, has 

 recently been thoroughly studied by Pfeiffer, although its 

 existence was known as far back as 1839. 



Surra. — In India a fatal disease known as surra occurs in 

 horses, mules, camels, etc. The cause of the disease, which 

 is characterised by fever, jaundice, and great prostration, 

 followed by death, is ascribed to the presence of a flagellated 

 parasite which occurs in the blood of the aft'ected animal in 

 vast numbers. 



Protozoa in Fly Disease or Nagana. — Surgeon-Major Bruce, 

 of Natal, has recently investigated the fatal disease which 

 occurs in horses, etc., caused by the bite of the tsetse fly. 

 Dr. Bruce finds that the disease produced by the bite of the 



