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Asepsis
Absence of pathogens/infections
Medical asepsis
clean technique (hand washing, Environment cleaning)
Aseptic Technique
Methods to decrease the transfer of microorganisms from one place to another
Nosocomial/Iatrogenic Infection
Infection acquired in a health care facility that was not present or incubating when the
client was admitted (Acquired while in a health care service)
Chain of infection
infectious agent, reservoir (source), portal of exit, mode of transmission, portal of entry,
susceptible host
Flora
Microorganisms that occur or have adapted to live in a specific environment
Flora: Resident
Always Present
Flora: Transient
Episodic (Having symptom-free periods that alternate with the presence of symptoms)
Virulence
ability of a pathogen:
- to cause disease
- survive on host
- susceptibility of host
Causative/Infectious Agent
The presence of an infectious agent alone is insufficient to cause disease:
Bacteria, Viruses, Fungi, Protozoa
Reservoir/Source
The environment for the pathogen to survive:
Oxygen, water, food, pH, Light, temperature
Portal of Exit/Entry
The path by which a pathogen leaves its host
Modes of transmission
- Droplet
- Airborne
- Contact
Susceptible Host (where they thrive and multiply)
Lacks resistance to an agent and is vulnerable to disease
Compromised Host
Has impaired defence mechanisms and is susceptible to infection
Hand washing
Most effective way to prevent the spread of infection (to "break the chain")