OPSONINS, STIMULINS, AGGRESSINS. 03 



INFLUENCE OF CHEMICALS AND REACTION ON 



OPSONINS. 



Various salts, even in small amounts, influence opsonic action 

 markedly. Noguchi has shown that in normal serum, reaction 

 exerts considerable influence on phagocytosis, it being most marked 

 when the serum to be tested is neutral in reaction. 



NON-BACTERIAL OPSONINS. 



Opsonins have been found to be produced for other cells than 

 bacteria. Hektoen has reported opsonins for blastomycetes and 

 red blood cells. Likewise it is possible to get marked phagocytosis 

 of inert particles of charcoal, stains, etc., upon the addition of 

 certain sera. 



