H.EMOSPORIDIA. 



G3 



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

 in Karyopliagus 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 it 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.* 



Faiu. 1. Acystidae. Epithelial para- 

 sites which form falciform germs. 

 Karyopliagus Steinhaus, amphibia. 



Fam. 2. Haemamcebidae. Mainly 

 in blood - corpuscles ; form amceboid 

 germs. Halteridium Labbe, with two 

 spores, birds, health unaffected ; Pro- 

 teosoma Labbe, with one spore, birds, 

 produces fever and may cause death ; 

 Hccmamceba Grassi, with one spore, 

 man, occurs in two forms, the one 

 amceboid (variety tcrtiana], and the 



FIG. 49.Cytamceba lactcrifera, from the 

 blood of Raiia esculenta (from Wasielewski, 

 after Labbe). a, amceboid form with long 

 movable pseudopodia ; li, rounded form 

 with numerous spores. 



other semilunar and immovable (vari- 

 ety quaterna). H. lavcrani Labbe 



(Figs. 52, 53), discovered in 1880 \)j 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 Cytamceba Labbe. in 

 Jlana esculenta; Apiosoma bigcminum Smith, associated with Texas-fever in 



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

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

 off (after Labbe). 



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

 high fever, anremia, 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 hremoglobinurea ; Amcebo- 

 sporidium polyphagum Bonone, associated with Icterus - hsematuria of the 

 sheep, are probably allied here. 



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



