An act of swallowing
The increased ingestion of bacteria in active immunity would seem to depend upon the presence of immune opsonins in the serum.
In other cases the infection of the first host is brought about by the ingestion FIG.
The other plan is to use an exclusively meat diet, combined with the ingestion of a large quantity of hot water, so as to cause free elimination.
Prolonged ingestion of arsenic may cause pigmentary changes in the skin.
Heusinger has shown that white sheep and pigs are injured by the ingestion (A) N b X N ?--,r N(A)+N of certain plants, while the pigmented individuals may eat them without harm.