SPECIAL MORPHOLOGY AND TAXONOMY OF SPOROZOA 463 



Lipschutz (1912) as organisms having the same attributes as 

 Chlamydozoa but named by him Strongyloplasmata. Other 

 minute organisms which occur in the form of filterable viruses have 

 been included in this group, the Rickettsia species causing Rocky 

 Mountain spotted fever, trench fever and typhus fever for example 

 are so treated by da Rocha-Lima (1916), Jungmann (1919), and 

 others (see p. 445). 



Fig. 193. — "Negri Bodies," Xcuroryctes hydrophobia;. Different forms assumed; 

 are they nucleated cells or are the apparent cell-bodies specific secretions of nerve 

 cells of the host about the parasites, thus justif>'ing the term "Chlamydozoa" ? 

 (After Negri.) 



The inclusions are in the form of granules of homogenous nature 

 and of very small size and are generally known as the "elementary 

 granules" which become invested in a mantle of substance derived 

 from the nucleus of the host cell hence the name Chlamydozoa or 

 "mantle-covered" animals. The granules are generally regarded 

 as microorganisms but even this is questioned by many {e. g., 

 Cowdry, 1922). Others regard the entire inclusion, mantle and 

 all as the organism (Negri, Councilman, Calkins, Williams, et al.) 

 evidence for which is given by Williams, 1906 (Fig. 19.'l). Despite 

 a vast literature on the subject the matter is still unsettled and 

 many still regard the etiology of the diseases in question as unknown. 



