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DEFINING DISEASE 1
Diseases can be…
Infectious/comm
unicable
Lifestyle/human
induced
Degenerative
Genetic
Deficiency
Often causes are
multifactorial and depend
Symptoms- Indications of a
on ine interplay between
Aetiology - the cause of a disease and
disease noticed by the patient
genes
factors underlying the spread of the and the
environment
disease
Signs- Indications of a disease that are
Epidemiology - the study and analysis
picked up by the doctor but not
of the patterns, causes, and effects of
necessarily by the patient
health and disease conditions in
defined populations
Infectious diseases are
caused by pathogens
Pandemic - an epidemic of infectious
disease that has spread through
Pathogens are organisms
human populations across a large
that invade the body and
region e
...
multiple continents or
cause harm
worldwide
DISEASE- a condition with
a specific cause in which
part/all of an organism is
made to function in an
abnormal/less efficient
manner
Epidemic - a widespread occurrence
of an infectious disease in a community
at a particular time
Host - a living cell in which a virus reproduces
Primary host - a host in which a parasite reaches
maturity and if possible reproduces
Reservoir host - a host that can harbor a pathogen
indefinitely with no ill effects
Reservoir - animate/inanimate sources which
normally harbor disease causing organisms and thus
serve as a potential source of continuous disease
Vector - any living organism that transmits an
infectious agent from one host to another host
Carrier - asymptomatic carrier, a person or organism
infected with an infectious disease agent, but displays
no symptoms
Communicable disease are
infectious diseases that can
be passed from one person to
another