[Answer] What are a capsule’s mechanisms of immune evasion?(3)

Answer: 1. antiphagocytic 2. decreased cell lysis by complement components 3. some
capsules mimic host polysaccharides
What are a capsule’s mechanisms of immune evasion?(3)
Capsular polysaccharides are an important immune evasion mechanism for Staphylococcus aureus. Staphylococcus aureus can cause severe life threatening invasive diseases. The principal immune effector mechanism by which humans are protected from Gram positive bacteria such as S. aureus is antigen specific antibody- and complement-dependent opsonophagocytosis.
We describe the mechanisms by which ALL cells escape from immune recognition and elimination by the immune system. We focus on the alterations in ALL cells such as overexpression of ligands for various inhibitory receptors including anti-phagocytic receptors on macrophages NK cell inhibitory receptors as well as T cell immune checkpoints.
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3 . Immune Evasion Immune Regulation and Immunopathology. If pathogens were static entities the regulatory mechanisms that avoid the overexpression of the immune response might be enough to ensure the optimal functioning of the system.
The strategies of immune evasion are directed towards three divisions of the immune system i.e. the humoral immune response the cellular immune response and immune effector functions. Members of the herpesvirus family are capable of interfering with the host’s immune system at almost every level of immune clearance.
Mechanisms whereby the Cryptococcus neoformans capsule subverts the immune system. Capsule components are released into the extracellular space and directly induce T-cell apoptosis or cell death mediated by antigen presenting cells.
In E. coli different mechanisms have been involved in compleme…

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