Host/Microbe relationship Flashcards
What are the 3 types of symbiotic relationships
- mutalism (both benifit)
- Commensalism (neither benifit or harmed)
- Parasitism (one benfits one is harmed)
what are the 4 things a pathogen must be able to do to cause a disease
- Gain entry in host
- Travel to location where it can be established
- Evade immune response
- cause damage to host
What is the disease triad
- Host (risk factors, occupation, behaviours etc)
- Environment (geology, climate etc)
- Pathogen (virulence, dose)
What is the 2 characteristics of a microbe that can affect its establishment in the hose
dose- number of organisms/ duration of exposure
virulence- strength of pathology
What is the prodromal period of a disease
stage where their is vague and general symptoms
What is the convalescence stage
period after decline when there are no s+s. It is the gradual recovery of health and strength after an ilness
what is the latent period of an infectious disease
The period of replication before shedding can occur
what is the communicable period of an infectious disease
Follows latency period and begins with shedding of the agent
(frequently the communicable period begins before symptoms are present)
What is an incubatory and covalescent carrier
Incubatory- those who can trnsmit the adjent during the incubation period before clinical illness
Covalescent- revovered from the ilness but remain cablable of transmitting
What is an acute self limited infection
grows until disease develops has short course then complete recovery
What is a persistent latent infection
microbe continous to be in pts. body following initial recovery in latent form.
reactivation with microbial growth and shedding will occur again
What is a persistent slow infection follwing acute infection
Following the initial recovery of the acute attack, microbe growth coninous over a long period of time during good growth conditions until max symptoms
