What can cause an infectious disease when they enter your body?

What can cause an infectious disease when they enter your body?

Infectious diseases are caused by microorganisms such as viruses, bacteria, fungi or parasites and can spread between individuals.

What are three ways to get an infectious disease?

Germs can spread from person to person through:

• the air as droplets or aerosol particles.
• faecal-oral spread.
• blood or other body fluids.
• skin or mucous membrane contact.
• sexual contact.

Why does infection develop?

An infection occurs when germs enter the body, increase in number, and cause a reaction of the body. Three things are necessary for an infection to occur: Source: Places where infectious agents (germs) live (e.g., sinks, surfaces, human skin) Susceptible Person with a way for germs to enter the body.

What can cause an infectious disease when they enter your body and multiply quizlet?

Infection, often the first step, occurs when bacteria, viruses or other microbes that cause disease enter your body and begin to multiply.

What are common sources of infection explain your answer?

Inhalation, e.g. breathing in airborne bacteria from coughs and sneezes. Ingestion e.g. from eating contaminated food. Direct contact, e.g. breaks in skin due to injury, skin conditions, poor hand drying. Physical contact with infected matter from wounds and bodily fluids.

What are the most common sources infectious agents are transmitted from?

The most common sources of infectious agents causing HAI, described in a scientific review of 1,022 outbreak investigations,20 are (listed in decreasing frequency) the individual patient, medical equipment or devices, the hospital environment, the health care personnel, contaminated drugs, contaminated food, and …

Can you develop a disease?

As individuals age, depending on their genetic inheritance along with what they do and what they are exposed to, they may develop a chronic disease which progresses over time. It is becoming more widely understood that chronic disease is often the result of multiple factors rather than one single factor.

How are viruses formed?

Viruses might have come from broken pieces of genetic material inside early cells. These pieces were able to escape their original organism and infect another cell. In this way, they evolved into viruses. Modern-day retroviruses, like the Human Immunodeficiency Virus (HIV), work in much the same way.

What causes an infectious disease when they enter your body and multiply?

Infection occurs when viruses, bacteria, or other microbes enter your body and begin to multiply. Disease, which typically happens in a small proportion of infected people, occurs when the cells in your body are damaged as a result of infection, and signs and symptoms of an illness appear.

What can cause an infectious disease when they enter your body and multiply *?

Viral Infections Viruses cause familiar infectious diseases such as the common cold, flu and warts. They also cause severe illnesses such as HIV/AIDS, smallpox and hemorrhagic fevers. Viruses are like hijackers. They invade living, normal cells and use those cells to multiply and produce other viruses like themselves.

Is sneezing indirect contact?

Indirect contact infections spread when an infected person sneezes or coughs, sending infectious droplets into the air.

What causes the development of an infectious disease?

Development of Infection. Infectious diseases are usually caused by microorganisms that invade the body and multiply. After invading the body, microorganisms must multiply to cause infection. After multiplication begins, one of three things can happen: Microorganisms continue to multiply and overwhelm the body’s defenses.

How does infection occur in the human body?

Infection occurs when viruses , bacteria, or other microbes enter your body and begin to multiply. Disease occurs when the cells in your body are damaged as a result of infection and signs and symptoms of an illness appear.

How do pathogens make us sick?

How Pathogens Make Us Sick. Infection with a pathogen does not necessarily lead to disease. Infection occurs when viruses, bacteria, or other microbes enter your body and begin to multiply. Disease occurs when the cells in your body are damaged as a result of infection and signs and symptoms of an illness appear.

How does an infectious disease spread from one person to another?

Direct contact. A common way for infectious diseases to spread is through the direct transfer of bacteria, viruses or other germs from one person to another. This can occur when an individual with the bacterium or virus touches, kisses, or coughs or sneezes on someone who isn’t infected.