What Are The 3 Factors That Cause Disease?

What three factors interact in the natural history of disease?

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..

How quickly can germs spread?

Researchers at the University of Bristol assessed the airborne survival of bacteria in aerosol droplets from coughs and sneezes. They found the average sneeze or cough can send around 100,000 contagious germs into the air at speeds up to 100 miles per hour.

What factors contribute to disease?

Water, sanitation, food and air quality are vital elements in the transmission of communicable diseases and in the spread of diseases prone to cause epidemics. A number of environmental factors influence the spread of communicable diseases that are prone to cause epidemics. The most important of these are: water supply.

What are the 5 stages of disease?

The five periods of disease (sometimes referred to as stages or phases) include the incubation, prodromal, illness, decline, and convalescence periods (Figure 2). The incubation period occurs in an acute disease after the initial entry of the pathogen into the host (patient).

Are diseases curable?

Some diseases can be cured. Others, like hepatitis B, have no cure. The person will always have the condition, but medical treatments can help to manage the disease. Medical professionals use medicine, therapy, surgery, and other treatments to help lessen the symptoms and effects of a disease.

What are 3 ways diseases can spread?

Infectious diseases can spread in a variety of ways: through the air, from direct or indirect contact with another person, soiled objects, skin or mucous membrane, saliva, urine, blood and body secretions, through sexual contact, and through contaminated food and water.

What are the 3 types of diseases?

There are four main types of disease: infectious diseases, deficiency diseases, hereditary diseases (including both genetic diseases and non-genetic hereditary diseases), and physiological diseases. Diseases can also be classified in other ways, such as communicable versus non-communicable diseases.

What are the 5 standard precautions for infection control?

Standard PrecautionsHand hygiene.Use of personal protective equipment (e.g., gloves, masks, eyewear).Respiratory hygiene / cough etiquette.Sharps safety (engineering and work practice controls).Safe injection practices (i.e., aseptic technique for parenteral medications).Sterile instruments and devices.More items…

What are the four stages of infection?

Key Points. The first phase is characterized by complete lack or very few symptoms. … Key Terms. … Stages of Disease. … STAGE 1: INCUBATION PERIOD. … STAGE 2: PRODROMAL PERIOD. … STAGE 3: ACUTE PERIOD. … STAGE 4: CONVALESCENCE PERIOD.

How can we prevent germs from spreading at home?

Keep the germs away:Wash your hands before eating, or touching your eyes, nose or mouth.Wash your hands after touching anyone who is sneezing, coughing or blowing their nose.Don’t share things like towels, lipstick, toys, or anything else that might be contaminated with respiratory germs.More items…

Can your own germs make you sick?

As for re-exposure, that virus on the toothbrush, lip balm, mascara, sheets or towels won’t make you sick again. But if other viruses and bacteria linger on these items, a new illness can develop.

What are the three major factors of the epidemiologic triangle?

The epidemiologic triangle is made up of three parts: agent, host and environment.

What is disease process?

Diseases are generally understood to be medical conditions that involve a pathological process associated with a specific set of symptoms. Localized diseases affect specific parts of the body; disseminated diseases spread to other parts of the body; and systemic diseases affect the entire body.

What can kill bacteria?

Although using normal cleaning products can help reduce bacteria on household surfaces, disinfectants can kill them. Some examples of disinfectants that can kill bacteria on surfaces include: products that contain alcohol, such as ethanol and isopropyl alcohol. household bleach.

What are the 7 killer diseases?

When people think of the deadliest diseases in the world, their minds probably jump to the fast-acting, incurable ones that grab headlines from time to time. … Stroke. … Chronic obstructive pulmonary disease. … Trachea, bronchus, and lung cancers. … Diabetes mellitus. … Dehydration due to diarrheal diseases.

What are the 10 most common diseases?

Heart disease. Share on Pinterest Many of the top 10 causes of death are preventable through lifestyle changes and regular checkups. … Cancer. Deaths in 2017: 599,108. … Unintentional injuries. … Chronic lower respiratory disease. … Stroke and cerebrovascular diseases. … Alzheimer’s disease. … Diabetes. … Influenza and pneumonia.More items…•