Local immunity in the pig respiratory tract. II. -- Relationship of serum and local antibodies.

Antibody passage from blood to respiratory secretions was studied on pigs. The animals were passively immunized and have a high anti-hog cholera serum antibody titer. With normal animals as with swine influenza animals, no serum antibody could be recovered neither in buccopharyngeal secretions nor in lung washings: it seems that in such conditions no… (More)