[Morphologic characteristics of bacteria treated with human blood serum and immunoglobulin]

The electron microscopic study of ultrathin sections of bacterial cells treated with blood serum has revealed the presence of the immunoglobulin cover located on the cell wall and consisting of blood serum components. Staphylococci (strain Smith), studied with the use of ruthenium red, have been found to possess the capsule and the immunoglobulin cover located at its base. The immunoglobulin cover has proved to be more pronounced in gram-positive bacterial (actinomycetes, peptococci, staphylococci) and faintly pronounced in gram-negative bacteria (Bacteroides, Proteus, Pseudomonas, Escherichia).