Principles of Immunisation Flashcards
What are 2 examples of natural passive immunity?
- placental transfer of IgG
- colostral transfer of IgA
What are 2 examples of artificial passive immunity?
- treatment with immunoglobulin
- immune cells
What is human normal immunoglobulin?
contains all antibodies- protein extracted from pooled blood donations
What is human specific immunoglobulin?
selected blood donor with high antibody titres against a specific organism
When is HNIG used for post-exposure prophylaxis?
- hep A
- measles
- polio
- rubella
When are specific immunoglobulins used for post-exposure prophylaxis?
- hep B
- rabies
- tetanus
- Varicella-Zoster virus
What is an advantage of passive immunity?
gives immediate protection
What are the disadvantages of passive immunity?
- short term: no immunological memory
- serum sickness
- graft versus host disease
What is an example of natural active immunity?
exposure/infection
What is an example of artificial active immunity?
vaccination
What are the advantages of active immunisation?
- antigen stimulated immune response
- long term immunity
- immunological memory
- faster and better response on second encounter
Vaccination
the administration of antigenic material to stimulate and individual’s immune system to develop adaptive immunity to a pathogen
Why might someone not receive a vaccination?
- febrile illness
- pregnant woman cannot receive live attenuated vaccines
- allergy
- immunocompromised cannot be given live attenuated viruses
How does an immune response occur?
- disease causing organism contains antigens
- antigens stimulate the production of antibodies
- antibodies bind to the organism and lead to its destruction and memory B cells are formed
How are live attenuated vaccines made?
attenuation of a pathogenic organism by repeated passage in cell culture or a non-human host