Quick Answer: What Is An Example Of An Infectious Agent?

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..

Which infectious agent is the smallest?

What Are Viruses, Bacteria, Fungi, and Parasites? The 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.

What are the 7 pathogens?

Infectious diseases are caused by pathogens, which include bacteria, fungi, protozoa, worms, viruses, and even infectious proteins called prions.

Which is the most contagious disease?

The top five are as follows:HIV/AIDS: 1.6 million deaths in 2012.Tuberculosis: 1.3 million deaths in 2012.Pneumonia: 1.1 million children under the age of five, according to yearly estimates.Infectious diarrhea: 760,000 children under the age of five, according to yearly estimates.Malaria: 627,000 deaths.

What is the most common virus in humans?

The most common type of viral disease is the common cold, which is caused by a viral infection of the upper respiratory tract (nose and throat). Other common viral diseases include: Chickenpox. Flu (influenza)

What are the 4 types of infections?

This article will focus on the most common and deadly types of infection: bacterial, viral, fungal, and prion.

Where do infectious diseases come from?

Most major human infectious diseases have animal origins, and we continue to be bombarded by novel animal pathogens. Yet there is no ongoing systematic global effort to monitor for pathogens emerging from animals to humans.

What is the infectious disease process?

The Infectious Disease Process. [last update 11/24/03] The infectious disease process includes the following components: (1) agent (2) reservoir (3) portals of entry and exit (4) mode of transmission (5) immunity. Types of agents range from the submicroscopic to the large parasites.

How long does a bacterial infection last?

Bacterial Infections Symptoms persist longer than the expected 10-14 days a virus tends to last. Fever is higher than one might typically expect from a virus. Fever gets worse a few days into the illness rather than improving.

What are the 5 major types of infectious agents?

There are five major types of infectious agents: bacteria, viruses, fungi, protozoa, and helminths. In addition, a new class of infectious agents, the prions, has recently been recognized. A brief review of the general characteristics of each of these agents and examples of some diseases they cause follows.

What are the 3 main ways infection can get into the body?

Infections can be spread through these 5 different ways:Physical contact. Infections, especially skin contagions, are spread by direct physical contact. … Droplet spreading. Colds, strep throat etc. … Contaminated items. … Bowel movements. … Exposure to blood.

What are the five signs of an infection?

Know the Signs and Symptoms of InfectionFever (this is sometimes the only sign of an infection).Chills and sweats.Change in cough or a new cough.Sore throat or new mouth sore.Shortness of breath.Nasal congestion.Stiff neck.Burning or pain with urination.More items…

What is the rarest disease on Earth?

RPI deficiency According to the Journal of Molecular Medicine, Ribose-5 phosphate isomerase deficiency, or RPI Deficinecy, is the rarest disease in the world with MRI and DNA analysis providing only one case in history.

What are infectious agents give example?

The agents that cause disease fall into five groups: viruses, bacteria, fungi, protozoa, and helminths (worms). Protozoa and worms are usually grouped together as parasites, and are the subject of the discipline of parasitology, whereas viruses, bacteria, and fungi are the subject of microbiology.

Where Can infectious agents be found?

Source: Places where infectious agents (germs) live (e.g., sinks, surfaces, human skin)…Contact moves germs by touch (example: MRSA or VRE). … Sprays and splashes occur when an infected person coughs or sneezes, creating droplets which carry germs short distances (within approximately 6 feet).More items…

How can infectious agents be prevented?

Preventing the Spread of Infectious DiseasesWash your hands often. … Get vaccinated. … Use antibiotics sensibly. … Stay at home if you have signs and symptoms of an infection. … Be smart about food preparation. … Disinfect the ‘hot zones’ in your residence. … Practice safer sex. … Don’t share personal items.More items…

How do you know your body is fighting an infection?

However, some general symptoms of a bacterial infection include: fever. feeling tired or fatigued. swollen lymph nodes in the neck, armpits, or groin.

What are infectious agents?

Infectious agents are organisms that are capable of producing infection or infectious disease. They include bacteria, fungi, viruses, and parasites.