536 Specificity of the Opsonic Substances in the Blood Serum. 



Conclusions. 



1. When staphylococci are brought into contact with normal human serum 

 and are subsequently removed by centrifugalisation, the serum loses its 

 opsonic power for staphylococcus, although the opsonic power of Bacterium 

 pyocyaneum is preserved. 



2. Contact of normal human serum with tubercle bacilli leaves the opsonic 

 power of that serum for staphylococcus almost intact, while the opsonic power 

 for tubercle bacillus is completely removed. 



3. Contact of. normal human serum with staphylococcus leaves the opsonic 

 power of that serum for tubercle bacillus almost intact, while the opsonic 

 power for staphylococcus is completely removed. 



4. Inoculation of a human being with tuberculin causes quantitative 

 increase in the tuberculo-opsonin, whereas the quantity of staphylococcus 

 opsonin is unaltered. 



5. Inoculation of a human being with staphylococcus vaccine causes a 

 quantitative increase in the staphylococcus opsonin, whereas the quantity of 

 tuberculo-opsonin is unaltered. 



