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Host invasion by microorganisms (view source)
Revision as of 13:12, 21 August 2008
, 13:12, 21 August 2008→Prevention and control
*Adaptive Immunity to Viruses
*Adaptive Immunity to Viruses
The adaptive immune system has two main ways of dealing with viral infection: the first targets viruses in its initial extracellular phase, the second targets infected host cells. '''B-lymphocytes''' are capable of producing Antibody to neutralize the spike proteins of the viral lipid envelope. This adaptive response depends on CD4 TH-1 cells monitoring blood-borne pathogens and returning to lymph organs for presentation to B cells, and can take considerably longer than the second response. '''Cytotoxic (CD8+) T cells''' target infected cells, which present any number of danger signals. Once alerted to the infection, CD8+ T-cells will recruit help and proceed to wipe out all infected cells in the area.
The adaptive immune system has two main ways of dealing with viral infection: the first targets viruses in its initial extracellular phase, the second targets infected host cells. '''B-lymphocytes''' are capable of producing Antibody to neutralize the spike proteins of the viral lipid envelope. This adaptive response depends on CD4 TH-1 cells monitoring blood-borne pathogens and returning to lymph organs for presentation to B cells, and can take considerably longer than the second response. '''Cytotoxic (CD8+) T cells''' target infected cells, which present any number of danger signals. Once alerted to the infection, CD8+ T-cells will recruit help and proceed to wipe out all infected cells in the area.
*Viral evasion of immunity
**Latency: Viruses can "hide" in host cells until the immune system is suppressed
**Transformation: the virus incorporates into the host genome, activating an '''oncogene''', which causes cells to become neoplastic
*[[Vaccines - WikiBlood|Vaccines]]
*[[Vaccines - WikiBlood|Vaccines]]