Infection Control and Nursing Assistant Safety

Comprehensive vocabulary flashcards covering basic microorganisms, the chain of infection, standard precautions, hand hygiene guidelines, PPE protocols, and isolation categories.

Microorganisms

Commonly known as germs; microscopic organisms found in soil, air, water, and on or in human bodies that can cause infection when they enter the body and multiply.

Infection

A condition that occurs when germs enter the body, increase in number, and cause a harmful reaction in the body.

Colonization

A state in which a person harbors germs without showing any symptoms of infection, but is still capable of passing those germs to others.

Infectious Agent

The specific microorganism, such as a virus, bacterium, or fungus, that causes harmful infections and illness.

Reservoir

The place where germs live and multiply, which can be a person (such as a patient or healthcare worker) or an environmental object (such as medical equipment or water).

Portal of Exit

The path or method by which a germ escapes from a reservoir, such as bodily fluids, open wounds, respiratory drops from coughing or sneezing, or vomit and diarrhoea.

Mode of Transmission

The mechanism by which germs travel from a reservoir to a susceptible host, including direct contact, sprays/splashes, air currents, or sharp injuries.

Portal of Entry

The route by which a pathogen enters a new person, such as through open wounds, mucous membranes (eyes and mouth), ingested food, or inserted tubes like catheters and feeding tubes.

Susceptible Host

A person at risk of infection who lacks sufficient resistance to fight off a pathogen, often due to age, immunocompromised status, underlying illness, or invasive treatments.

Chain of Infection

A series of six interconnected steps—infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host—that must occur in sequence for an infection to spread.

Standard Precautions

The minimum infection prevention practices applied to all patient care in any healthcare setting, operating on the assumption that all blood, body fluids, non-intact skin, and mucous membranes are infectious.

Personal Protective Equipment (PPE)

Specialized clothing or equipment worn by healthcare employees for protection against exposure to infectious materials.

Gloves

Disposable, clean protective hand coverings worn when contact with blood, body fluids, secretions, excretions, mucous membranes, or non-intact skin is anticipated.

Gowns

Protective garments worn to shield skin and clothing when anticipating exposure or splashes from body fluids during patient care.

Donning PPE Sequence

The standard four-step order for putting on protective gear: 1. Gown, 2. Mask, 3. Goggles or face shield, 4. Gloves.

Alcohol-Based Hand Rub

The preferred product for routine hand decontamination when hands are not visibly soiled, providing the highest effectiveness in reducing bacterial counts.

CDC Fingernail Standard

The recommendation by the Centers for Disease Control and Prevention that healthcare workers maintain natural fingernails no longer than $\frac{1}{4}\,\text{inch}$ to prevent bacterial buildup.

Healthcare-Acquired Infections (HAI)

Infections that patients acquire while receiving medical treatment within a healthcare facility.

Contact Isolation

Infection control precautions implemented for diseases transmitted by direct touching of the patient or indirect contact with contaminated environmental items.

Airborne Isolation

Infection control precautions used for infectious agents spread via aerosolized particles that remain infectious while suspended in air currents over long distances and time.

Droplet Isolation

Infection control precautions used for pathogens transmitted through large respiratory sprays generated by coughing or sneezing, traveling approximately $6\,\text{feet}$.

Reverse Isolation

Precautions designed to protect vulnerable, immunocompromised patients from infectious agents present in the surrounding environment or carried by staff and visitors.