Create an account
1. suspect pathogen must be present in every case of the disease
2.pathogen must be isolated and grown in pure culture
3. cultured pathogen must cause the disease when introduced into a healthy host
4. same pathogen must be reisolated from the diseased host
the spread of pathogens via air, drinking water, and food as well as bodily fluids being handled outside the body
this involves the spread of pathogens to teh respiratory mucous membranes of a new host via an aerosol
Vectors that not only transmit pathogens but also serve as hosts for the multiplication of a pathogen during some stage of its life cycle
Vectors that are not required as hosts by the pathogens they transmit;such vectors only passively carry pathogens on their feet or other body parts
when the organism evades bodys external defenses, multiplies and becomes established in the body
virulence factors that contribute to virulence
adhesion, biofilms, extracellular enzymes, toxins, antiphagocytic factors.
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together