What are the 3 elements of the epidemiological triangle?
Among the simplest of these is the epidemiologic triad or triangle, the traditional model for infectious disease. The triad consists of an external agent, a susceptible host, and an environment that brings the host and agent together.
Which is an example of an agent in the epidemiologic triangle?
The Agent—“What” Disease-causing microbes are bacteria, virus, fungi, and protozoa (a type of parasite).
What does the epidemiologic triangle show?
The Epidemiologic Triangle, sometimes referred to as the Epidemiologic Triad, is a tool that scientists use for addressing the three components that contribute to the spread of disease: an external agent, a susceptible host and an environment that brings the agent and host together.
What is the epidemiologic triad of tuberculosis?
The main factors predisposing to TB acquisition follow the causal model of the epidemiological triad, which shows that the interaction among the bacillus, the host and environmental factors increases the probability of catching TB(1).
Which component of the epidemiology triangle represents the organism that is causing disease?
Agent. The agent within the epidemiological triad is microbes that cause disease to occur. When considering infectious diseases, the agent is an external microorganism that needs to be present in order for the disease to occur.
What are the 3 factors that cause disease?
Infectious diseases can be caused by:
- Bacteria. These one-cell organisms are responsible for illnesses such as strep throat, urinary tract infections and tuberculosis.
- Viruses. Even smaller than bacteria, viruses cause a multitude of diseases ranging from the common cold to AIDS.
- Fungi.
- Parasites.
What are the 5 W’s of epidemiology?
The difference is that epidemiologists tend to use synonyms for the 5 W’s: diagnosis or health event (what), person (who), place (where), time (when), and causes, risk factors, and modes of transmission (why/how).
What part of the epidemiological triad does the infectious agent represent?
Agent. The agent within the epidemiological triad is microbes that cause disease to occur. When considering infectious diseases, the agent is an external microorganism that needs to be present in order for the disease to occur. These pathogens include viruses, bacteria, fungi, parasites, and other microorganisms.
What is importance of epidemiological triad?
The Epidemiological Triad is one of the traditional models for depicting disease causation, but is by far the simplest of them all. The triad is used to determine the cause of infectious diseases, non-infectious diseases, and accidents or injuries.
When can a TB patient be considered noninfectious?
Patients can be considered noninfectious when they meet all of the following three criteria: They have three consecutive negative AFB sputum smears collected in 8- to 24-hour intervals (one should be an early morning specimen); They are compliant with an adequate treatment regimen for two weeks or longer; and.
What role does the epidemiological triangle play in environmental health?
Epidemiologists use a tool to help understand infectious disease known as the epidemiologic triangle. The epidemiologic triangle is a model for explaining the organism causing the disease and the conditions that allow it to reproduce and spread.
Which of the following is an indirect infectious disease transmission mode?
Indirect contact infections spread when an infected person sneezes or coughs, sending infectious droplets into the air. If healthy people inhale the infectious droplets, or if the contaminated droplets land directly in their eyes, nose or mouth, they risk becoming ill.