Lecture 5 Adaptive Immunity (Naturally Acquired Passive Immunity (When…
Lecture 5 Adaptive Immunity
Naturally Acquired Active Immunity
Naturally Acquired Active Immunity- Response to exposure to a pathogen or environment antigens by mounting specific immune response.
Body’s always naturally engaged in own protection.
Immunological Memory- Memory your body’s immune system has to remember different diseases and what controls them.
Immunological Memory allows rapid and powerful and often provides body with complete protection.
Naturally Acquired Passive Immunity
When the body is not actively producing antibodies, it is in Naturally Acquired Passive Immunity.
Newborns possess cells and tissues needed to mount an immune response, they respond slowly to antigens.
If solely relied on Naturally Acquired Active Immunity, newborns might die before the immune response was adequate enough to sustain pathogen.
In the womb babies receive IgG molecule from mother’s blood and after birth the mother gives IgA molecule to her baby through breast milk to help provide protection
With these Naturally Acquired Active and Passive Immunity provides baby with antibodies to protect in early months.
Artificially Acquired Active Immunity
Physicians induce immunity into patients by introducing antigens in form of vaccine.
Patients body mounts active response against foreign molecule.
Uses immunological memory with vaccines to provide better protection.
Artificially Acquired Passive Immunity
Active immune response may be too slow to protect against a rattlesnake venom. Therefore, HCW harvest antibodies for specific toxins and pathogens that are deadly or too fast for immune system.
They acquire these by getting blood of immune humans or animals. Physicians then inject antisera or antitoxins into infected person to provide a short but immediate relief.
Active Vs. Passive
Active Immune responses, whether naturally or artificially induced are advantageous because of immunological memory and protection against further infection.
Passive processes, individuals are provided fully formed antigens, which have advantage of speed but do not have immunological memory because B and T lymphocytes are not activated.