Vaccines Flashcards
why should animals be vaccinated?
protection from life threatening clinical disease
who is protected when animals are vaccinated?
the individual
the animal population by achieving heard immunity
the human population (zoonosis)
when is herd immunity achieved?
when 70% of the population is vaccinated against a disease
what is the risk vs benefit calculation with vaccination?
disease vs adverse reaction from vaccine
what is the name for homeoprophylaxis that is used by some in place of a vaccine?
nosodes - is not a vaccine!
define vaccine
a substance that is administered in order to stimulate an immune response and immunological memory in the host against a particular disease
define immunity
protection from a disease
how what are the 2 ways immunity can be acquired other than infection and recovery?
active
passive
what is active immunity?
that which is acquired through vaccination
what is passive immunity?
that which is acquired through maternally derived antibodies
what is an antigen?
a substance which the immune system produces antibodies against
what does an antigen form part of in an vaccine?
active component - usually part/an infectious agent
what are antigens used in as well as for vaccines?
cancer therapy
de-sensitisation programmes for allergies
what is an antibody?
an immunoglobulin that is part of the specific immune attach against a specific antigen
what is serology?
blood test to measure the level of antibodies in the blood against a specific infectious organism
what does serology measure?
level of antibodies in the blood
what will a positive antibody result in serology correlate with in some diseases?
the level of protection that the animal has
what is the difference between mucosal immunity and cell mediated immunity?
mucosal is antibodies found on mucosal surface, cell mediated is related to T Cells
what is titre a measure of?
the level of antibody in the blood
what are the 2 types of vaccines?
infectious (live)
non-infectious (killed)
what are infectious vaccines also known as?
live
modified live (MLV)
live attenuated
what is the animal vaccinated with when they are given a live vaccine?
modified/attenuated (reduced pathogenicity) whole organism of the disease you are vaccinating against
what does the live vaccine do within the body?
circulates
infects
replicates
what is caused by a live vaccine?
low level infection
what sort of immune response does a live vaccine result in?
strong
how frequent does re-administration of live vaccines need to be?
less frequent than inactivated
what are non-infectious vaccines known as?
killed
inactivated
what is the animal vaccinated with when they are given a inactivated vaccine?
whole organism (or sometimes subunit) of the disease being vaccinated against that is killed or inert
what is contained in subunit inactivated vaccines?
antigen from the organism
what are the newer inactivated vaccines that are available?
recombinant
naked DNA
do inactivated vaccines cause infection?
no
what is required within inactivated vaccines to stimulate an immune response?
adjuvants
what is required to maintain immunity from an inactivated vaccine?
multiple doses and more frequent readministration
how should vaccines be stored?
varies between vaccines - check data sheet
what is the most common storage location for vaccines?
refridgerated
what temperature must refrigerated vaccines be stored at?
2-8 degrees C
how are vaccines classically delivered?
SQ
what are the other routes of vaccine delivery?
intra-nasally
IM
orally
what must happen before an animal receives a vaccine?
health check with the vets
why are the vaccines within the CORE vaccinations programme needed?
due to prevalence