l8o THE ANIMAL PARASITES OF MAN 



Theileria mutans, Theiler, 1907. 



Syn. : Fir op I as ma mutans, 



This is transmissible experimentally by blood inoculation. It occurs in cattle in 

 South Africa and Madagascar and is apparently non-pathogenic. No Koch's blue 

 bodies are formed. It is transmitted by ticks. 



Theileria annulata (Dschunkowsky and Luhs) occurs in cattle in Transcaucasia. 

 A Theileria (T. slordii] has been found in a gazelle (Franga, 1912). 



Genus. Anaplasma, Theiler, 1910. 



This genus 1 may be mentioned here. The organisms included therein are, 

 according to Theiler, coccus-like, consisting of chromatin, and are devoid of cyto- 

 plasm. They occur in the red blood corpuscles of cattle, causing a disease charac- 

 terized by destruction of red cells, fever and anaemia, but with yellow urine. The 

 disease is tick transmitted. The bodies now called Anaplasma marginale were 

 formerly described as marginal points. They multiply by simple fission. They are 

 said by Theiler to cause gall- sickness in cattle in South Africa. Some authors doubt 

 whether these bodies are organismal. 



Recently schizogony has been stated to occur in the lungs, and it is 

 said that guinea-pigs can be inoculated with Paraplasnia flarigeiiiiiii, 

 and show yellow pigment in the spleen. 



Seidelin places Paraplasina in the Babesiidcr, with resemblances 

 more particularly to Theileria. V. Schilling-Torgau and Agramonte 

 have criticized these findings ; the former considers them to be the 

 resultant of certain blood conditions. 



P. subflavigenmn was found by Seidelin in 1912 in a man suffering 

 from an unclassified fever in Mexico. 



Further, it is now known that a Paraplasma occurs naturally in 

 guinea-pigs. More researches are needed on these matters, as some 

 writers (e.g., Wenyon and Low) claim that the bodies are not 

 organismal. . 



1 Bull. Soc. Path. Exot., iii, p. 135. ' 2 Yellow Fever Bulletin, i, p. 251. 



