HUMAN INFECTIONS 767 



question of the possibility of biting flies taking up spores from the skin 

 Watson (1909) also drew attention to the occurrence of spores in blood 

 films. 



Sarcosporidia in Man. 



According to Darling (1909, 1910a), who has recorded two cases of 

 human sarcosporidiosis, the infection is rare in man. The organism 



iy. 





1 



Fig. 330. — Sarcocystis lindemanni from the Muscle Fibres of the Human 

 Larynx. (After Baraban and St. Remy, 1893.) 



1. Longitudinal section of a muscle with a cyst in situ ( x 300). 

 2-3. Transverse section of infested muscle fibres ( x 300). 

 4. Portion of a section of a cyst from which the spores have dropped out, showing the septa 

 ( X 680), ' 5. Single spore ( x 1,600). 



