Module I Infection Powerpoint Flashcards
What are the components of the infection cycle?
- Infectious agent
- Portal of exit
- reservoir
- means of transportation
- Portal of entry
- susceptible host
What are examples of infections agents?
- Bacteria
- viruses
- fungi
Define reservoir
- Natural habitat of the organism
Define portal of exit
- Point of escape for the organism
What are the means of transmission?
- Direct contact
- indirect contact
- airborne route
Define portal of entry
- Point at which organisms enter a new host
Define susceptible host
- Must overcome resistance mounted by host’s defenses
Define bacteria
- Most significant and most prevalent in hospital settings
Define virus
Smallest of all microorganisms
Define fungi
Plant like organisms present in the air, soil, and water
Define parasites
Live on or in a host and rely on it for nourishment
What shapes are bacteria categorized with
- Spherical (cocci)
- rod shaped (bacilli)
- corkscrew shape (spirochetes)
What gram staining are bacteria categorized as?
- Gram positive
- gram negative
What are the bacteria oxygen categories?
- Aerobic: need oxygen to live
- anaerobic: can live without oxygen
What are the possible reservoirs for microorganisms?
- Other people
- animals
- soil
- food, water, milk
- inanimate objects
What are the common portals of exit?
- Respiratory
- gastrointestinal
- genitourinary tracts
- breaks in skin
- blood and issue
What are the means of transmission?
- Direct contact
- indirect contact: vector, fomite
- droplet
- airborne
What are the stages of infection?
- Incubation period
- prodromal stage
- full stage of illness
- convalescent period
What occurs in the incubation period?
When organisms grow and multiply
What occurs in the prodromal stage?
When the person is most infectious, vague and nonspecific signs of disease
What occurs in the full stage of illness?
- The presence of specific signs and symptoms of disease