Question: What Are The Three Factors Of The Epidemiological Triangle?

Why are epidemiological measures useful?

The essence of epidemiology is to measure disease occurrence and make comparisons between population groups.

The current section introduces the commonly used measures that help our understanding of the distribution of disease in a given population..

What are epidemiological factors?

By definition, epidemiology is the study (scientific, systematic, and data-driven) of the distribution (frequency, pattern) and determinants (causes, risk factors) of health-related states and events (not just diseases) in specified populations (neighborhood, school, city, state, country, global).

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.

What are the 6 modes of transmission?

Modes of transmissionDirect. Direct contact. Droplet spread.Indirect. Airborne. Vehicleborne. Vectorborne (mechanical or biologic)

What are the five core functions of epidemiology?

Section 4: Core Epidemiologic Functions. In the mid-1980s, five major tasks of epidemiology in public health practice were identified: public health surveillance, field investigation, analytic studies, evaluation, and linkages.

What are the 3 major types of epidemiological studies?

Three major types of epidemiologic studies are cohort, case-control, and cross-sectional studies (study designs are discussed in more detail in IOM, 2000). A cohort, or longitudinal, study follows a defined group over time.

What are the two types of epidemiology?

Epidemiologic studies fall into two categories: experimental and observational.

What three factors are considered in 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.

What is the role of epidemiology?

It is the scientific method of investigation problem-solving used by disease detectives— epidemiologists, laboratory scientists, statisticians, physicians and other health care providers, and public health professionals—to get to the root of health problems and outbreaks in a community.

What is the difference between a mechanical and a biological vector of a disease?

Biological vectors, such as mosquitoes and ticks may carry pathogens that can multiply within their bodies and be delivered to new hosts, usually by biting. Mechanical vectors, such as flies can pick up infectious agents on the outside of their bodies and transmit them through physical contact.

What are the five modes of disease transmission?

The transmission of microorganisms can be divided into the following five main routes: direct contact, fomites, aerosol (airborne), oral (ingestion), and vectorborne. Some microorganisms can be transmitted by more than one route.

What are the predisposing factors of disease?

Key PointsSome predisposing factors of contracting infectious diseases can be anatomical, genetic, general and disease specific.Climate and weather, and other environmental factors that are affected by them, can also predispose people to infectious agents.More items…•

What is the host agent environment triangle?

The classical epidemiological triangle of host-agent-environment describes how individuals become ill. Disease occurs when an outside agent (vector) capable of causing disease or injury meets a host that is vulnerable to the agent. This happens in an environment that allows the agent and host to interact.

What are the three most essential elements of descriptive epidemiology?

In descriptive epidemiology, we organize and summarize data according to time, place, and person. These three characteristics are sometimes called the epidemiologic variables.

What is the agent host and environment of Ebola?

Some fruit bats are considered to be the natural host of Ebola virus. In Africa, infection has been documented through the handling of infected chimpanzees, gorillas, fruit bats, monkeys, forest antelope and porcupines found ill or dead in the rainforest.

Why are epidemiological measures useful quizlet?

Epidemiological measures are useful tools because: They help determine which diseases may need greater public health campaign or prevention efforts. … An estimated 1.8 million infected individuals died from the disease. Calculate the incidence rate of tuberculosis per 100,000 in the population in 2015.

What is epidemiological evidence?

Unlike laboratory experiments, epidemiology provides evidence based on studies of human populations under real-world conditions. It largely avoids the extrapolations across species and levels of exposure that are required for the use of data from animal experiments, and which contribute large uncertainties.

What is the epidemiological triangle?

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 are the four 4 common modes of disease transmission?

The modes (means) of transmission are: Contact (direct and/or indirect), Droplet, Airborne, Vector and Common Vehicle. The portal of entry is the means by which the infectious microorganisms gains access into the new host.

What are the 3 types of risk factors?

The three categories of risk factors are detailed here:Increasing Age. The majority of people who die of coronary heart disease are 65 or older. … Male gender. … Heredity (including race) … Tobacco smoke. … High blood cholesterol. … High blood pressure. … Physical inactivity. … Obesity and being overweight.More items…

What are the three factors of the epidemiological triangle quizlet?

The epidemiological Triangle model includes three key elements: the agent, host, and environment.