102 IMMUNE SERA 



D II represents the last conceivable case. It is 

 assumed that the " completion " of the inter-body 

 has resulted in a diminution of the latter's affinity 

 for the bacterial receptor. In this case primarily 

 only the uncomplemented inter-bodies will com- 

 bine with the bacterial receptors, while the free 

 fluid will contain complemented inter-bodies. 



In cases C II and D II, therefore, the excess of 

 inter-body exerts a deflecting action on the complement, 

 thus diminishing the end results. 



It is difficult to say to what extent " deflection of 

 complement " really occurs in the experiments 

 referred to above. Recent studies by Buxton x 

 and others show that deflection of complement will 

 not always explain the phenomenon, and that in 

 these instances other factors must be responsible 

 for the paradoxical results. 



For the absorption of complement commonly 

 known as the " Bordet-Gengou," or the " Gengou- 

 Moreschi " phenomenon, see page 68. To avoid 

 confusion it will be well to restrict the term " deflec- 

 tion of complement " to the phenomenon described 

 by Neisser and Wechsberg. 



Deutsch's Hsemolytic Blood Test. Deutsch 2 in 

 1900 suggested the use of artificial haemolysins in 

 legal medicine, in the identification of bloods, 



1 Buxton; Journal Medical Research, Vol. xiii, 1905. 

 3 Deutsch, Die forensische Serumdiagnose des Blutes, 

 Centralblatt Bacteriol., Vol. xxix, 1901. 



