768 



SARCOSPOKIDIA 



described from man by Rivolta (1878) as Gregarina lindemanni is probably 

 one of these parasites. Rosenberg (1892) saw certain structures, which are 

 possibly Sarcosporidia, in the heart muscle of a man. He proposed to 

 name the parasite S. hominis. A case regarded as authentic by Darling 

 (1910a) was reported by Kartulis (1893). There appears to be no doubt 

 about one described by Baraban and St. Remy (1894). In this case the 

 infection occurred in the larynx, the muscle fibres of which were distended 

 to about four times their normal thickness (Fig. 330). The first case 

 described by Darling was in a negro. The parasites were discovered in 

 portions of the biceps muscle, which had been removed owing to suspicious 

 signs of trichinosis. The patient was actually suffering from typhoid 

 fever, and it is concluded that the pains complained of in the muscles 

 were actually due to the typhoid infection, and not to the Sarcosporidia. 

 The largest parasites found had a length of 84 microns and a breadth of 

 27 microns, while the spores measured 4-25 by 1-75 microns. The second 

 case described by Darling (1919) was in an East Indian who had died of 

 malaria. Sections of the tongue revealed the parasites in the muscle 

 fibres. Manifold (1924) described an infection of the muscle fibres of a 

 human heart. The spores in this case were over 10 microns in length. 



Sarcosporidia in Animals. 



Though Miescher (1843) discovered the Sarcosporidia in the muscle 

 fibres of the mouse, they were first named by Kiihn (1865) Synchytrium 

 miescher ianum. As they evidently did not belong to this genus, Ray 

 Lankester (1882) established the genus Sarcocystis, by which name they are 

 now known. As already remarked, many forms have received distinctive 

 names because of variations in size and their occurrence in different hosts. 

 Alexeieff (1913a) justly remarks that there is no means of distinguishing 

 the supposed species. He concludes that they all belong to the one 

 species, S. miescheriana (Kiihn, 1865). The following forms have been 

 recorded : 



Recorded Species of Sarcocystis. 



