Unit 6 - Infection Flashcards
Types of microorganisms causing infections:
- most commonly cause infection
bacteria
Types of microorganisms causing infections:
- nucleic acid, must enter living cells
viruses
Types of microorganisms causing infections:
- yeasts, molds
fungi
Types of microorganisms causing infections:
- protozoa, helminths, arthropods
parasites
what happens when infection occurs
microorganisms invade body part with ineffective defenses
4 types of infection
- local
- systemic
- acute
- chronic
Six links chain of infection:
- etiological agent
- reservoir
- portal of exit from reservoir
- method of transmission
- Portal of entry
- Susceptible host
Portal of Entry:
- skin is _____ to infectious agents
- break in skin can readily serve as a _____ _____ _____
- enter the body as the _____ route they left the source
- mouth, throat, nose, eyes, and genitalia are most frequent _____ _____ _____
- barrier
- portal of entry
- same
- portals of entry
3 methods of transmission
- direct
- indirect
- airborne
infants begin to synthesize immune system at _____-_____ months of age
1-3
Alterations:
- microorganisms invade human body and proliferate when they are undetected, uncontrolled, or not eliminated by the _____ and _____ responses
inflammatory and immune
_____-_____ and _____ routes are most common modes of transmission in children
Fecal-Oral and respiratory
T/F: poor hand hygiene is a common source of transmission
T
Bacteria, viruses, fungi, and parasites are all types of _____
pathogens
soluble proteins that the microorganisms secrete into surrounding tissue
exotoxins
T/F: exotoxins are highly poisonous
T
exotoxins cause cell _____ or _____
death or dysfunction
Where are endotoxins found
in the cell wall of gram-negative bacteria
When are endotoxins released
only when the cell wall is disrupted
Stages of the infectious process:
- incubation
- prodromal stage
- illness
- convalescent stage
What happens in the carrier state
- host defenses eliminate infectious disease
- organism continues to multiply
Infections cause predictable diseases depending on the _____ _____
infecting microorganism
Complications of infectious diseases:
- typically _____ to the infecting organism and the body system affected
- _____ is a severe reaction to infection
- _____ _____ leads to diffuse cell and tissue injury and potentially to organ failure
- specific
- sepsis
- septic shock
_____ infection is the most common type of HAIs
UTI