Chapter 14 Flashcards
Symbiosis means
To live together
We have symbiotic relationships with countless
Microorganisms.
Normal Microbiota in Hosts also termed _______ and _________.
Normal flora
Indigenous microbiota
Normal flora and indigenous microbiota
Organisms that colonize the body’s surface without normally causing disease
Part of microbiota for life
Resident microbiota
remain in body for hours
Transient microbiota
Resident microbiota and transient microbiota cannot
persist in the body; competition from other microbiota
- Elimination by the body’s defense cells(White Blood Cells)
- Chemical or physical changes in the body
Normal microbiota in hosts
- Aquisition of normal microbiota
- Development in womb, free of microorganisms (axenic enviroment)
Microbiota begin to develop during
Birthing process
Much of one’s resident microbiota establish during
first months of life
Normal microbiota that cause disease under certain circumstances
Opportunistic pathogens
Conditions that provide opportunities for pathogens
- Introduction of normal microbiota into unusual site in body
- Immune system
- Change in normal microbiota
- Change in relative abundance may allow opportunity for a member to thrive and causes disease
Most pathogens cannot survive long outside a
Host
Sites where pathogens are maintained as a source of infection
Reservoirs of infection
Three types of reservoirs
Animal reservoirs
Human reservoirs
Nonliving reservoirs
