Binding of pepsin-treated human immunoglobulin to the bacterial cell surface: An immunocytochemical study.

Abstract
A fibrous substance was consistently observed on the cell surface of bacteria, Klebsiella pneumoniae and Staphylococcus aureus, after incubation with a pepsin-treated human Ig. The chemical composition of the fibrous substance was studied by an immunocytochemical technique. The major component of the fibrous substance was human Ig.