Disease Patterns
Epidemiology Triangle
Chain of Infection
Types of Carriers
Levels of Prevention
100

This type of disease pattern occurs randomly and infrequently, without a predictable pattern.

What is Sporadic?

100

In the epidemiology triangle, this type of disease lives inside humans, animals and organisms

What is a Host?

100

The location where an infectious agent normally lives and multiplies.

What is a Reservoir?

100

Someone who currently has symptoms and is spreading it to their coworkers

What is an Active Carrier?

100

A routine mammogram meant to catch breast cancer early

What is Secondary Prevention?

200

COVID-19 is an example of this disease pattern, since it spread across multiple countries and continents.

What is a Pandemic?

200

Weather, sanitation, climate, and living conditions are examples of factors that allow a disease to spread.

What is an Environment?

200

An individual, animal, or plant vulnerable to infection or disease caused by a specific pathogen

What is a Specific Host?

200

A person recovering from typhoid fever who no longer feels sick but can still pass on the bacteria.

What is a Convalescent Carrier?

200

A person drinking tap water that's already been fluoridated, with no effort on your part, 

What is Passive Primary Prevention?

300

When cases of a disease suddenly rise in one specific, limited area, like a town.

What is an Outbreak?

300

Bacteria, viruses, fungi, and parasites are all examples that can caused a human, animal, or an organism to be infected.

What is an Agent/Pathogen?

300

Coughing and sneezing are examples of ways an infectious agent leaves this part of the chain.

What is Portal of Exit?

300

Someone who can spread chickenpox a day or two before their rash even appears is this type of carrier.

What is an Incubatory Carrier?

300

Physical therapy after a stroke, meant to help someone regain function.

What is Tertiary Prevention?

400

This disease pattern is native to a particular area or population.

What is an Endemic?

400

The relationship between when a disease appears, how long it lasts, and how quickly it spreads.

What is Time?

400

A pathogen entering the body through the respiratory tract, digestive system, or broken skin.

What is Portal of Entry?

400

A person that harbors and can transmit a pathogen but never develops any symptoms at all.

What is a Healthy/Passive Carrier?

400

An individual voluntarily changing their diet to lower their personal risk of heart disease.

What is Active Primary Prevention?

500

An influenza outbreak occurs in one city and affects more people than health officials expected it to for that time of year, this disease pattern is called...

What is an Epidemic?

500

A mosquito carrying malaria from a person, animal or organism to the next is called a... (Sometimes included in the Epidemiological Triangle)

What is a Vector?

500

Sharing contaminated objects, touching surfaces, or coming into contact with infected individuals are examples of this process.

What is Modes of Transmission?

500

Someone who sheds a pathogen periodically, rather than constantly.

What is an Intermittent Carrier?

500

A city passing a law requiring seatbelts, aimed at stopping harm before a crash ever occurs.

What is Primary Prevention?

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