382 



MICROBIOLOGY 



crushed preparations they appear free although occasionally 

 they are found engulfed by giant cells. As found in sections 

 of the fixed and stained tissues they appear as spherical or 

 slightly oval bodies, varying from 6 to 10 ^ in diameter. In 



P^ig. 81. Ameba meleagridis. 1, Isolated organisms; 2, single para- 

 sites; 3, groups of the parasites (a) of the ameba in the mucous 

 membrane of a turkey's celium. (After Smith.) 



most of them, nuclear bodies appear centrally or somewhat to 

 one side which are about 2 /x in diameter. 



These organisms differ from the ameba of dysentery in 

 being more uniform and varying but slightly in size and in 

 being free from vacuoles. 



Moore 7 was able to transmit the disease caused by it by 

 feeding the excreta and infected livers and caeca to healthy 

 turkeys. Chester 8 reports this disease in chickens, and Milks 9 

 described the disease and the organism in chickens in Lou- 

 isiana. 



7 Moore. Cir. No. 5, B. A. I., U. S. Dept. Agric., 1896. 



8 Chester. Kept, of the Bacteriologist, Delaware Coll. Agric. 

 Exper. Station, 1899-1900. 



9 Milks. Bulletin No. 108, Louisiana Agric. Exp. Station, 1908. 



