Quick Answer: What Are The 5 Infectious Agents?

What are the 4 infectious agents?

Infectious agents are organisms that are capable of producing infection or infectious disease.

They include bacteria, fungi, viruses, and parasites..

What are the 5 basic modes of transmission of infection?

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.

How do you identify an infectious agent?

Microscopy may identify microorganisms. Immunofluorescence, immuno-peroxidase staining, and other immunoassays may detect specific microbial antigens. Genetic probes identify genus- or species-specific DNA or RNA sequences. Culture: Isolation of infectious agents frequently requires specialized media.

Where Can infectious agents be found?

Source: Places where infectious agents (germs) live (e.g., sinks, surfaces, human skin) Susceptible Person with a way for germs to enter the body….People are one source of germs including:Patients.Healthcare workers.Visitors and household members.

What are the 5 most common infectious diseases?

The 5 Most Common Infectious DiseasesHepatitis B. According to current statistics, hepatitis B is the most common infectious disease in the world, affecting some 2 billion people — that’s more than one-quarter of the world’s population. … Malaria. … Hepatitis C. … Dengue. … Tuberculosis.

What is an example of an infectious agent?

Infectious agents come in many shapes and sizes. Bacteria and protozoans are microscopic one-celled organisms, while viruses are even smaller. Fungi grow like plants, and helminths resemble worms.

What are the main ways infectious agents are transmitted?

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 is the most common type of infectious agent?

There are different types of pathogens, but we’re going to focus on the four most common types: viruses, bacteria, fungi, and parasites.

What is the smallest infectious agent?

prionsThe smallest known infectious agents, prions are composed of a single protein and viroids are a simple circle of ribonucleic acid (RNA). Prions infect brain tissue and cause normal proteins to change shape leading to cell death.

Where do infectious agents come from?

Pathogens associated with HAIs are derived primarily from human sources, but contaminated objects and environmental sources are also implicated. Human sources include patients, HCP, house hold members, and visitors.

How many types of infection are there?

Viral infections. Viral infections occur due to infection with a virus. Millions of different viruses may exist, but researchers have only identified about 5,000 types to date.

What is infectious disease?

Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They’re normally harmless or even helpful. But under certain conditions, some organisms may cause disease. Some infectious diseases can be passed from person to person.