opsonin's Usage Examples:

This opsonin of normal serum is very labile, being rapidly destroyed at 55° C.

This opsonin of normal serum is very labile, being rapidly destroyed at 55° C.

It is now generally admitted that at least two distinct classes of substances are concerned in opsonic action, that thermostable immune opsonins are developed as a result of active immunization and these possess the specific properties of anti-substances in general, that is, act only on the corresponding bacterium.

In the light of all the facts, however, especially those contains an opsonin which leads to phagocytosis of the bacillus, and the latter is then destroyed by the leucocytes.

This, as already pointed out, depends upon the increase of opsonins, though it is also to be noted that in many infective conditions there is another factor present, namely a leucocytosis, that is, an increase of the leucocytes in the blood, and the defensive powers of the body are thereby increased.

The increased ingestion of bacteria in active immunity would seem to depend upon the presence of immune opsonins in the serum.