Chain of Infection HS 1 Chain of Infection
- Slides: 16
Chain of Infection HS 1
Chain of Infection
For disease to occur and spread from one person to another, certain conditions must be met. These are called the chain of infection.
Chain of Infection • Transmission of infections occurs when the agent leaves its reservoir or host through a portal of exit, is conveyed by some mode of transmission, and enters through an appropriate portal of entry to infect a susceptible host.
Causative Agent • A pathogen that can cause disease • Example: bacteria or virus
Reservoir • Area where the causative agent can live • Example: human body, animals, environment • Fomites-objects contaminated with infections material that contains pathogens • Example: doorknobs, bedpans, urinals, linens, & instruments
Portal of Exit • A way for the causative agent to escape from the reservoir in which it has been growing. • Example: Urine, feces, saliva, blood, tears, mucous discharge, sexual secretions, & draining wound
Mode of Transmission • A way that the causative agent can be transmitted to another reservoir or host where it can live. • Can be through direct or indirect contact
Mode of Transmission • Direct contact: person-to-person contact (physical or sexual) • Example-contaminated hands
Mode of Transmission • Indirect contact: pathogen is transmitted from contaminated substance (food, air, soil, insects, feces, clothing, instruments, & equipment) • Example-touching contaminated equipment & spreading the pathogen on the hands, breathing in droplets carrying airborne infections, & contacting vectors (insects, rodents, or small animals), such as being bitten by an insect carrying a pathogen
Portal of Entry • A way for the causative agent to enter a new reservoir or host • Example: breaks in the skin or mucous membrane; respiratory, digestive, genitourinary, and circulatory system
Susceptible Host • A person likely to get an infection or disease, usually because body defenses are weak
Break the Chain! • If any part of the chain is eliminated, the spread of disease or infection will be stopped
Do You Know? • In the chain of infection, an instrument contaminated with blood acts as a ______? A) causative agent B) reservoir C) portal of exit D) Portal of entry Answer is……
Do You Know? • In the chain of infection, a pathogen leaving the body is an example of _____? A) portal of exit B) reservoir C) mode of transmission D) causative agent And the answer is…. .
- Grazing food chain diagram
- Main sources of food
- Chain of infection
- Chain of infection for lyme disease
- Infection process cycle
- The chain of infection
- Spiderbite ngt
- Value chain and supply chain difference
- Closed chain kinematics
- Focal infection
- Différence entre ias et infection nosocomiale
- Mycotic infection rabbit
- Infection control surveyor worksheet
- Lrti
- Defination of infection
- Postpartum infection
- Root locus drawer