Bacterial Pathogenicity Flashcards
what is the life cycle of a parasite?
enter - attach - colonise - evade host immunity - produce harmful proteins - disseminate - release from host
what is a pathogen?
an organism capable of causing disease
what is a commensal?
an organism that is part of the normal flora
what is pathogenicity?
the ability to cause disease
what is virulence?
the ability to cause severe disease
what are microorganisms divided into?
bacteria, fungi, viruses, prions, parasites
what is colonisation?
when microbes find a new host and start to multiply
how is normal flora acheived?
getting a balance between colonised microbes and humans
what is an infection?
a disease caused by a microbe
what is it called when a patient’s own flora causes an infection?
endogenous infection
what is an exogenous infection?
if the source of microbe is flora from outside the patients body
what is Kochs postulates?
the microbe must be present in every case of the disease, the microbe must be isolated from the diseased host and grown in pure culture, the disease must be reproduced when a pure culture is introduced into a susceptible host, the microbe must be recovered from an experimentally infected host
what are the different ways that parasites can be transmitted?
person-to-person, fomites, insects, water and food
how are parasites transmitted via person-to-person
contaminated blood or other bodily fluids, touch, saliva and air
which part of the prokaryotic cell is used for attachment?
pili(fimbriae)
