lecture 35 Flashcards
what are the 5 stages in human response to disease
incubation period , prodromal period, illness, decline and Convalescence
describe the incubation period
the pathogen is beginning to multiply but the population is not yet big enough to cause any symptoms, but the pathogen has at this point invaded the host tissue.
describe the prodromal period
this is when we see the onset of the first vague symptoms of the disease.
describe the illness stage
for most infections this is when the symptoms are at their peak, this is the most infectious time during the immune response
describe the decline
the immune system, drug or therapy is at its highest level in the response. As these are in their highest response in this time there is the decrease in the pathogen population
describe the convalescence stage
all signs of the virus are now disappearing, still infectious in this stage.
what’s the cause of the common cold
a rhinovirus
what temp does a rhinovirus prefer to grow at and where does it find these conditions
32 degrees, this is not the temperature of core body but the air temperature in the nasal cavity
whats the chain of infection
the six required components for an infection to spread from one person to another
whats the study of disease transmission called
it is called epidemiology
what are the 6 key components of the chain of infection
Causative agent, A reservoir or source of infection, means of exit, mode of transmission, portal of entry and person at risk
define causative agent:
what causes the disease in the first place
define “ A reservoir or source of infection”
where can the bug be stored and be waiting for transmission
reservoir examples
Human / Animal / Fomite /
Food / Water
whats a fomite
objects or materials which are likely to carry infection, such as clothes, utensils, and furniture.
