How can humoral immune mechanisms protect against respiratory pathogens?

Immunoglobin A (IgA) Synthesised in submucosal areas and binds to antigens to prevent their attachment to epithelial cells. Agglutinates microorganisms, leading to easier removal of mucociliary transport. Immunoglobin B (IgB) Enhances macrophage handling of bacteria, agglutinates microparticles and activated complement