1 410 THE ENTEROIDEA GROUP OF TROPICAL FEVERS 



given good results is the following: — 5 c.c. of blood drawn aseptically 

 from "a vein is placed in 50 c.c, of a 2 per cent, solution of tauro- 

 cholate of soda in distilled water, incubated at 35° C. for twenty- four 

 hours, and then plated out on MacConkey's plates. These are incu- 

 bated for twenty-four hours, and any white colony present is further 

 investigated. 

 Prognosis. — This is favourable. 



Treatment. — ^The treatment is symptomatic. Vaccines have been 

 tried in a few cases, but no definite results have been so far obtained. 



COLUMBENSIS PARENTERIC. 



Synonym. — Febris columbensis. 



Historical and Geographical Distribution. — The disease and its 

 causative germ were described by Castellani in Ceylon in 1905. 

 Spaar published a case in 1914. Recently cases have been recorded 

 in India by De Mello, in Europe, in the Balcanic Zone by Lurie, and 

 in the South of Europe by Conte. It also occurs in the Anglo- 

 Egyptian Sudan. 



Fig. 663. — Temperature Chart of Columbensis Parenteric. 



etiology. — The causative germ isB. columbensis Castellani, 1905. 

 This germ is somewhat peculiar in that occasionally when recently 

 isolated its action on lactose may not be constant, the same strain 

 having at times no action whatever on lactose, at other times slightly 









m 







100- -iJ- — -f- 





































Fig. 664. — Temperature Chart of Columbensis Parenteric Fever. 



fermenting it. After several subcultures all the strains become 

 non-lactose fermenters. It is not agglutinated by typhoid, para- 

 typhoid A and paratyphoid B sera. Its biochemical characters can 

 be found in the table of intestinal bacteria on p. 946. It differs from 

 B, paratyphosus A and B in producing gas in glycerine and other 



