ACNIDOSPORIDIA, SARCOSPORIDIA 641 



Sarcocystis infections were also noticed in the rats from one of the 

 piggeries from which infected pigs were obtained. Fungus nature of 

 the organism (p. 639); effect on host (Spindler, Zimmerman and 

 Jaquette, 1946). 



S. bertrami Doflein. In the muscles of horse; similar to S. miescher- 

 iana; parasitic mass up to 9-10 mm.; envelope striated. 



S. muris Blanchard. In body muscles of rats and mice; parasitic 

 masses up to 3 cm. long; spores 13-15/x by 2.5-3/*; transmissible to 

 guinea pig (Negri) which shows experimental infection in muscles in 

 50-100 days after feeding on infected muscles. 



S. rileyi Stiles. In muscles of various species of ducks; parasites in 

 muscle, opaque white in color and measure up to 5 mm. by 2 mm.; 

 spores are sausage-shaped and 8-10/i by about 3;u. 



References 



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