What are the three elements of the epidemiologic triangle list and describe each element and include an example for each element?
The epidemiologic triangle is made up of three parts: agent, host and environment.
- Agent. The agent is the microorganism that actually causes the disease in question.
- Host. The agent infects the host, which is the organism that carries the disease.
- Environment.
- HIV.
How does the epidemiology triad relate to environmental health?
The triad consists of an external agent, a susceptible host, and an environment that brings the host and agent together. In this model, disease results from the interaction between the agent and the susceptible host in an environment that supports transmission of the agent from a source to that host.
What is an example of a reservoir?
Reservoirs include humans, animals, and the environment. The reservoir may or may not be the source from which an agent is transferred to a host. For example, the reservoir of Clostridium botulinum is soil, but the source of most botulism infections is improperly canned food containing C. botulinum spores.
Is environment an epidemiology?
Environmental epidemiology is the study of the distribution and environmental determinants of disease. This observational science relies upon events occurring within human populations, so-called natural experiments, from which inference is drawn to identify causes of disease.
What is the importance of descriptive epidemiology?
This makes it possible to identify trends in health and disease and also provides a means of planning resources for populations. In addition, descriptive epidemiology is important for generating hypotheses (possible explanations) about the determinants of health and disease.
Why is place important in epidemiology?
Analyzing data by place can identify communities at increased risk of disease. Even if the data cannot reveal why these people have an increased risk, it can help generate hypotheses to test with additional studies.
What is an environmental reservoir?
Environmental reservoirs include living and non-living reservoirs that harbor infectious pathogens outside the bodies of animals. These reservoirs may exist on land (plants and soil), in water, or in the air. Pathogens found in these reservoirs are sometimes free-living.
What are the 4 water reservoirs?
Throughout Earth’s history, water has been distributed between four distinct reservoirs—the oceans, ice sheets and glaciers (the cryosphere), terrestrial storage and the atmosphere.
What are the 10 environmental factors?
Temperature, oxygen, pH, water activity, pressure, radiation, lack of nutrients…these are the primary ones. We will cover more about metabolism (i.e. what type of food can they eat?) later, so let us focus now on the physical characteristics of the environment and the adaptations of microbes.
What is organism and their environment ecology?
Ecology Organisms And Their Environment Ecology: Organisms and Their Environment Ecology is the study of the interaction of organisms in an area with the surrounding environment. This interaction constitutes an overall adaptation of the organisms to their environment which also includes the continuity of species.
What is ecology and its importance?
Ecology is the study of the interaction of organisms in an area with the surrounding environment. This interaction constitutes an overall adaptation of the organisms to their environment which also includes the continuity of species.
What factors affect the availability of organisms in an area?
However, the availability of organisms in an area is dependent on the type of environment. Thus, the availability of specific species is indirectly dependent on the various factors like annual rainfall, average temperature conditions, the position of the earth with respect to the sun, etc.
What is the relationship between organisms and their environment?
Ecology: Organisms and Their Environment. Ecology is the study of the interaction of organisms in an area with the surrounding environment. This interaction constitutes an overall adaptation of the organisms to their environment which also includes the continuity of species. However, the availability of organisms in an area is dependent on