o7 



Bettencourt suggests creating a new genus which he proposes to call 

 " Theileria," including all the parasites which present the bacillary form 

 and which divide themselves in originating forms of a cross. In this 

 manner the name Babesia would be reserved solely for parasites of the 

 type Babesia bigemina. 



From our present knowledge of Piroplasma parvum, principally its 

 non-inocubility and the presence of certain intracellular bodies found in 

 the internal organs of an affected animal which will be referred to later, 

 and from the fact that an immune animal does not retain the infection 

 in the blood, the genus — Theileria — has to be completely separated from 

 the rest of the piroplasms and to be considered as a genus of its own. 

 For the same reason it follows that the suggestion of Bettencourt to include 

 the bacillary forms in one geniis cannot be accepted, and the inoculable 

 bacillary piroplasms either represent a genus of their own or should belong 

 to the group of Babesia. 



The following grouping may represent the present knowledge : — 



Inoculable (Babesioses). 



I. 



(a) Babesia type, B. Bigeminum. 



II. 



(b) Babesia bacilliformes, type Babesia mutans. 

 Babesia of Madras (Christopher and Stephens). 



,, Annam (Shein). 



,, Gold Coast of Africa (Boeret). 



,, Dutch Indies (Does). 



,, Peycheles, China (Martini). 



,, Grerman East Africa (Lichtenheld). 



,, Soudan (Balfour). 



„ Congo (Stanley Pool) (A. Broden and 

 J. Rodhain. 



III. 



Non-Inoculable. 



{a) Theileria. Type : Theileria parva. 

 Bast Coast fever is a new disease for South Africa. In the year 1897, 

 Professor Koch when investigating diseases in German East Africa 

 described an endoglobular micro-organism of bacillary form, and which 

 at that time was regarded by him to be young forms in the development 

 of Piroplasma bigeminum, the cause of redwater (Texas fever), and accord- 

 ingly designated the disease by that name. From 1898 to 1901 it attracted 

 no special attention. About the latter end of 1901, an outbreak of a 

 disease corresponding to that observed by Koch in German East Africa 

 was found amongst a mob of recently imported cattle at Beira ; a number 



