Study Guides (248,169)
United States (123,294)
BIOL 2051 (73)
All (69)

Final Microbiology Exam Chp 25 26 (got 94% in the course)

18 Pages
Unlock Document

Biological Sciences
BIOL 2051
All Professors

Chapter 25 Microbial PathogenesisHostPathogen InteractionsInfectionentry of pathogen or parasiteInfection doesnt always cause diseaseMost infections removed by immune systemPrimary pathogensHave ability to penetrate host defensesOpportunistic pathogensCause disease only in comprised hostsImmune system defectiveBreak in tissue allows organism access to new siteLoss of other microfloraallows organism to bloomPathogenicity of organismMeasure of ability to cause diseaseDetermined by genetic makeup of organismInfectious dose ID50Number of organisms to colonize 50 of hostsVirulenceRate of lethal infectionsLethal doseLD 50Number of organisms to kill 50 of hostsInfection CycleSpread by direct contact Spread by indirect contactContact with fomitesinanimate object or substance that can carry infectious microbesHorizontal transmission via vectors typically insectsMosquitoes Yellow fever malaria Reservoir for disease organism could be a bird bird to mosquito to humanMay not show disease symptomsMode of entry depends on pathogenMucosal surfaces wounds insect bitesVirulence FactorsVirulence genesEncode factors allowing pathogen to invade hostToxins attachment proteins capsulesPathogenicity islandsSection of genomeContain multiple virulence genesOften encode related functionsEg protein secretion system toxin productionTransferred as a block from other organism
More Less

Related notes for BIOL 2051

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.