Bacterial pathogenicity Flashcards
what are pathogenic bacteria?
bacteria that cause disease
what is a commensal organism?
organism in normal flora
what is pathogenicity?
ability to cause disease
what is virulence?
ability to cause severe disease
what are micro-organisms?
agents of infectious disease that are ubiquitous (found everywhere), most are harmless
give examples of microorganisms?
bacteria, fungi, virus, prion, parasite
what is colonisation?
when a microbe multiplies in a host
if a microbe form an individuals flora causes disease, the disease is said to be?
endogenous infection
if a microbe from outwit a patients body causes infection, the infection is said to be a?
exogenous infection
what does Koch’s Postulates or germ theory of disease ultimately show?
1 organism causes a particular disease
how may infection be transmitted?
- person to person
- fomites (object carrying infection)
- insect
- water
- food
how are prokaryotic cells different from eukaryotic?
Prokaryotic cells do not contain a nucleus or any other membrane-bound organelle.
what is the prokaryotic capsule?
polysaccharide layer that lies outside the cell envelope of bacteria
what are fibre and what do they do?
arms- attach to specific surfaces
what is the function of a flagellum?
allow prokaryote to swim