1 Flashcards
1
Q
What is a pathogen?
A
Bacteria, protozoa, virus, prions, protozoa
2
Q
What are Koch’s postulates
A
Organism regularly found in disease lesions
Organisms may be isolated from diseased host in pure culture or artificial medium (except mycobacterium leprae, or Trepena pallidum)
Inoculation of culture into healthy host produces similar disease
May be recovered from re-inoculated experimental host and identified as identical to original causative organism
3
Q
What organisms cannot be cultured? Why can’t they be cultured?
A
Mycobacterium leprae and Trepena pallidum, they need extremely specific environments to grow in
4
Q
Examples of artificial culture
A
Solid agar media, tissue culture, liquid culture media
