ILEMOSPORIDIA. 



63 



that two groups of spores are formed. The spores are generally ampeboid, but 

 in Karyophagus they are sickle-shaped. They pass into the blood, and then 

 enter other blood-corpuscles. 



How these organisms are carried from host to host is not known ; but j has 

 been suggested that they may be taken into the lungs in dust, and be carried 

 by parasitic insects and ticks. It 

 appears certain that the organism 

 associated with Texas-fever is carried 

 by a tick, Boophilus bovis.* 



Fam. 1. Acystidae. Epithelial para- 

 sites which form falciform germs. 

 Karyophagus Steinhaus, amphibia. 



Fam. 2. HaemamcebidEe. Mainly 

 in blood - corpuscles ; form amoeboid 

 germs. Halteridium Labbe, with two 

 spores, birds, health unaffected ; Pro- 

 teosoma Labbe, with one spore, birds, 

 produces fever and may cause death ; 

 Hcemamoeba Grassi, with one spore, 

 man, occurs in two forms, the one 

 amoeboid (variety tertiana), and the 

 other semilunar and immovable (vari- 

 ety quaterna). H. laverani Labbe 



(Figs. 52, 53), discovered in 1880 by Laveran in the blood of malaria patients, 

 causes destruction of the red corpuscles, period of development of germs 48-72 

 hours. Golgi showed the connection between the attacks of fever and the 

 development of this parasite ; Dadylosoma Labbe and Cytamosba Labbe. in 

 fiana esculenta ; Apiosoma bigeminum Smith, associated with Texas-fever in 



FIG. 49. Cytamceba bacterifera, from the 

 blood of Rana esculenta (from Wasielewski, 

 after Labbe). a, amoeboid form with long 

 movable p.seudopodia ; b, rounded form 

 with numerous spores. 



FIG. 50. Successive stages or degeneration (Polymitus-form) of Halteridium danilewskyi, 

 from the blood of the lark ; I, c stages with vibratile flagella ; in d these are being cast 

 off (after Labbe). 



cattle, infection carried by ticks, amoeboid organisms in the red blood-corpuscles, 

 high fever, anaemia, bloody urine, the number of red blood-corpuscles is dimin- 

 ished in one week to one-sixth. 



Babesia bovis Babes, in blood of the ox, causing hfemoglobinurea ; Aincebo- 

 sporidium polyphagum Bonone, associated with Icterus -heematuria of the 

 sheep, are probably allied here. 



Th. Smith, Centralbl. Bakt. Parasitk. 13, 1893, p. 511. 



