http://en.wikipedia.org/wiki/Phagocyte
Bacteria often produce proteins or sugars that coat their cells and interfere with phagocytosis; these are called capsules.Some examples are the K5 capsule and O75 O antigen found on the surface of Escherichia coli,and theexopolysaccharide capsules of Staphylococcus epidermidis.Streptococcus pneumoniae produces several types of capsule that provide different levels of protection,and group A streptococci produce proteins such as M protein andfimbrial proteins to block engulfment. Some proteins hinder opsonin-related ingestion; Staphylococcus aureus produces Protein A to block antibody receptors, which decreases the effectiveness of opsonins.
Bacteria often produce proteins or sugars that coat their cells and interfere with phagocytosis; these are called capsules.Some examples are the K5 capsule and O75 O antigen found on the surface of Escherichia coli,and theexopolysaccharide capsules of Staphylococcus epidermidis.Streptococcus pneumoniae produces several types of capsule that provide different levels of protection,and group A streptococci produce proteins such as M protein andfimbrial proteins to block engulfment. Some proteins hinder opsonin-related ingestion; Staphylococcus aureus produces Protein A to block antibody receptors, which decreases the effectiveness of opsonins.
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