Infectious Disease Flashcards
define infectious disease
disease that is able to be passed from one person, animal or plant to another
define zoonosis (zoonotic disease)
disease that can be passed from humans to animals
give an example of a zoonotic disease
leptosporosis
define reverse zoonosis
a disease that can be passed from humans to animals
what is a community acquired disease?
a disease that is acquired within the community
what is a hospital acquired / nosocomial disease?
disease acquired in hospital
what is a pathogen?
disease causing organism
what are commensals?
organism that inhabits a specific mucosal surface in the body and is a normal finding
what type of organisms are bacteria?
single celled
why are bacterial cells prokaryotic?
have no nucleus
how do bacteria reproduce?
binary fission
describe how binary fission works
adult cell splits into two identical daughter cells
what are the 3 main bacteria shapes/morphology?
coccoid (spherical)
bacillus (rods)
spiral
what is an example of a coccoid bacteria?
Staphylococcus
what is an example of a bacillus bacteria?
Escherichia coli
what is an example of spiral bacteria?
Leptosporosis
as well as morphology how do bacteria vary?
staining and cellular characteristic
what are the 2 ways bacterial infections are diagnosed?
organism detection
demonstration of antibody (for some)
how can bacteria be detected?
microscopy and/or culture
what size are viruses?
sub-microscopic
what is required by a virus in order to replicate?
host cell